zhongwuzw a51fa6c002 Call RCTInitializeUIKitProxies before bridge create (#49776)
Summary:
In bridge mode, we missed the call of `RCTInitializeUIKitProxies`, leading to UI API called on a background thread.  bridgeless is ok because we call it when create host https://github.com/facebook/react-native/pull/49600 .

```

=================================================================
Main Thread Checker: UI API called on a background thread: -[UIApplication connectedScenes]
PID: 91600, TID: 2326173, Thread name: com.facebook.react.JavaScript, Queue name: com.apple.root.default-qos.overcommit, QoS: 0
Backtrace:
4   React                               0x000000010695c700 RCTKeyWindow + 84
5   React                               0x0000000106942a44 -[RCTTraitCollectionProxy init] + 120
6   React                               0x00000001069429ac __41+[RCTTraitCollectionProxy sharedInstance]_block_invoke + 36
7   libdispatch.dylib                   0x0000000107bd65d0 _dispatch_client_callout + 16
8   libdispatch.dylib                   0x0000000107bd8088 _dispatch_once_callout + 84
9   React                               0x0000000106942960 +[RCTTraitCollectionProxy sharedInstance] + 88
10  CoreModules                         0x000000010538c488 -[RCTPlatform getConstants] + 80
11  CoreModules                         0x000000010538c42c -[RCTPlatform constantsToExport] + 32
12  React                               0x00000001068f2440 -[RCTModuleData gatherConstantsAndSignalJSRequireEnding:] + 752
13  React                               0x00000001068f26c4 -[RCTModuleData exportedConstants] + 40
14  React                               0x00000001068fd6e8 _ZN8facebook5react15RCTNativeModule12getConstantsEv + 200
15  cxxreact                            0x00000001090e55d0 _ZN8facebook5react14ModuleRegistry9getConfigERKNSt3__112basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEE + 1280
16  jsireact                            0x0000000108fb742c _ZN8facebook5react16JSINativeModules12createModuleERNS_3jsi7RuntimeERKNSt3__112basic_stringIcNS5_11char_traitsIcEENS5_9allocatorIcEEEE + 188
17  jsireact                            0x0000000108fb7120 _ZN8facebook5react16JSINativeModules9getModuleERNS_3jsi7RuntimeERKNS2_10PropNameIDE + 332
18  jsireact                            0x0000000108f9ff88 _ZN8facebook5react11JSIExecutor17NativeModuleProxy3getERNS_3jsi7RuntimeERKNS3_10PropNameIDE + 292
19  reacthermes                         0x0000000109478644 _ZN8facebook3jsi19DecoratedHostObject3getERNS0_7RuntimeERKNS0_10PropNameIDE + 92
20  hermes                              0x0000000109edb344 _ZN8facebook6hermes17HermesRuntimeImpl8JsiProxy3getEN6hermes2vm8SymbolIDE + 88
21  hermes                              0x0000000109fc5590 _ZN6hermes2vm8JSObject27getComputedWithReceiver_RJSENS0_6HandleIS1_EERNS0_7RuntimeENS2_INS0_11HermesValueEEES7_ + 712
22  hermes                              0x0000000109fb0e90 _ZN6hermes2vm11Interpreter17interpretFunctionILb0ELb0EEENS0_10CallResultINS0_11HermesValueELNS0_6detail20CallResultSpecializeE2EEERNS0_7RuntimeERNS0_16InterpreterStateE + 10024
23  hermes                              0x0000000109fae734 _ZN6hermes2vm7Runtime21interpretFunctionImplEPNS0_9CodeBlockE + 132
24  hermes                              0x0000000109fe92d8 _ZN6hermes2vm7Runtime11runBytecodeEONSt3__110shared_ptrINS_3hbc14BCProviderBaseEEENS0_18RuntimeModuleFlagsEN4llvh9StringRefENS0_6HandleINS0_11EnvironmentEEENSB_INS0_11HermesValueEEE + 1420
25  hermes                              0x0000000109ecde7c _ZN8facebook6hermes17HermesRuntimeImpl26evaluatePreparedJavaScriptERKNSt3__110shared_ptrIKNS_3jsi18PreparedJavaScriptEEE + 220
26  hermes                              0x0000000109ecdd04 _ZN8facebook6hermes17HermesRuntimeImpl31evaluateJavaScriptWithSourceMapERKNSt3__110shared_ptrIKNS_3jsi6BufferEEES9_RKNS2_12basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEE + 116
27  hermes                              0x0000000109ecec9c _ZN8facebook6hermes17HermesRuntimeImpl18evaluateJavaScriptERKNSt3__110shared_ptrIKNS_3jsi6BufferEEERKNS2_12basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEE + 32
28  reacthermes                         0x0000000109476514 _ZN8facebook3jsi16RuntimeDecoratorINS0_7RuntimeES2_E18evaluateJavaScriptERKNSt3__110shared_ptrIKNS0_6BufferEEERKNS4_12basic_stringIcNS4_11char_traitsIcEENS4_9allocatorIcEEEE + 64
29  reacthermes                         0x00000001094736f4 _ZN8facebook3jsi20WithRuntimeDecoratorINS_5react12_G
Main Thread Checker: UI API called on a background thread: -[UIApplication connectedScenes]
PID: 91600, TID: 2326173, Thread name: com.facebook.react.JavaScript, Queue name: com.apple.root.default-qos.overcommit, QoS: 0
Backtrace:
4   React                               0x000000010695c700 RCTKeyWindow + 84
5   React                               0x0000000106942a44 -[RCTTraitCollectionProxy init] + 120
6   React                               0x00000001069429ac __41+[RCTTraitCollectionProxy sharedInstance]_block_invoke + 36
7   libdispatch.dylib                   0x0000000107bd65d0 _dispatch_client_callout + 16
8   libdispatch.dylib                   0x0000000107bd8088 _dispatch_once_callout + 84
9   React                               0x0000000106942960 +[RCTTraitCollectionProxy sharedInstance] + 88
10  CoreModules                         0x000000010538c488 -[RCTPlatform getConstants] + 80
11  CoreModules                         0x000000010538c42c -[RCTPlatform constantsToExport] + 32
12  React                               0x00000001068f2440 -[RCTModuleData gatherConstantsAndSignalJSRequireEnding:] + 752
13  React                               0x00000001068f26c4 -[RCTModuleData exportedConstants] + 40
14  React                               0x00000001068fd6e8 _ZN8facebook5react15RCTNativeModule12getConstantsEv + 200
15  cxxreact                            0x00000001090e55d0 _ZN8facebook5react14ModuleRegistry9getConfigERKNSt3__112basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEE + 1280
16  jsireact                            0x0000000108fb742c _ZN8facebook5react16JSINativeModules12createModuleERNS_3jsi7RuntimeERKNSt3__112basic_stringIcNS5_11char_traitsIcEENS5_9allocatorIcEEEE + 188
17  jsireact                            0x0000000108fb7120 _ZN8facebook5react16JSINativeModules9getModuleERNS_3jsi7RuntimeERKNS2_10PropNameIDE + 332
18  jsireact                            0x0000000108f9ff88 _ZN8facebook5react11JSIExecutor17NativeModuleProxy3getERNS_3jsi7RuntimeERKNS3_10PropNameIDE + 292
19  reacthermes                         0x0000000109478644 _ZN8facebook3jsi19DecoratedHostObject3getERNS0_7RuntimeERKNS0_10PropNameIDE + 92
20  hermes                              0x0000000109edb344 _ZN8facebook6hermes17HermesRuntimeImpl8JsiProxy3getEN6hermes2vm8SymbolIDE + 88
21  hermes                              0x0000000109fc5590 _ZN6hermes2vm8JSObject27getComputedWithReceiver_RJSENS0_6HandleIS1_EERNS0_7RuntimeENS2_INS0_11HermesValueEEES7_ + 712
22  hermes                              0x0000000109fb0e90 _ZN6hermes2vm11Interpreter17interpretFunctionILb0ELb0EEENS0_10CallResultINS0_11HermesValueELNS0_6detail20CallResultSpecializeE2EEERNS0_7RuntimeERNS0_16InterpreterStateE + 10024
23  hermes                              0x0000000109fae734 _ZN6hermes2vm7Runtime21interpretFunctionImplEPNS0_9CodeBlockE + 132
24  hermes                              0x0000000109fe92d8 _ZN6hermes2vm7Runtime11runBytecodeEONSt3__110shared_ptrINS_3hbc14BCProviderBaseEEENS0_18RuntimeModuleFlagsEN4llvh9StringRefENS0_6HandleINS0_11EnvironmentEEENSB_INS0_11HermesValueEEE + 1420
25  hermes                              0x0000000109ecde7c _ZN8facebook6hermes17HermesRuntimeImpl26evaluatePreparedJavaScriptERKNSt3__110shared_ptrIKNS_3jsi18PreparedJavaScriptEEE + 220
26  hermes                              0x0000000109ecdd04 _ZN8facebook6hermes17HermesRuntimeImpl31evaluateJavaScriptWithSourceMapERKNSt3__110shared_ptrIKNS_3jsi6BufferEEES9_RKNS2_12basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEE + 116
27  hermes                              0x0000000109ecec9c _ZN8facebook6hermes17HermesRuntimeImpl18evaluateJavaScriptERKNSt3__110shared_ptrIKNS_3jsi6BufferEEERKNS2_12basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEE + 32
28  reacthermes                         0x0000000109476514 _ZN8facebook3jsi16RuntimeDecoratorINS0_7RuntimeES2_E18evaluateJavaScriptERKNSt3__110shared_ptrIKNS0_6BufferEEERKNS4_12basic_stringIcNS4_11char_traitsIcEENS4_9allocatorIcEEEE + 64
29  reacthermes                         0x00000001094736f4 _ZN8facebook3jsi20WithRuntimeDecoratorINS_5react12_G
=================================================================
Main Thread Checker: UI API called on a background thread: -[UIScene activationState]
PID: 91600, TID: 2326173, Thread name: com.facebook.react.JavaScript, Queue name: com.apple.root.default-qos.overcommit, QoS: 0
Backtrace:
4   React                               0x000000010695c808 RCTKeyWindow + 348
5   React                               0x0000000106942a44 -[RCTTraitCollectionProxy init] + 120
6   React                               0x00000001069429ac __41+[RCTTraitCollectionProxy sharedInstance]_block_invoke + 36
7   libdispatch.dylib                   0x0000000107bd65d0 _dispatch_client_callout + 16
8   libdispatch.dylib                   0x0000000107bd8088 _dispatch_once_callout + 84
9   React                               0x0000000106942960 +[RCTTraitCollectionProxy sharedInstance] + 88
10  CoreModules                         0x000000010538c488 -[RCTPlatform getConstants] + 80
11  CoreModules                         0x000000010538c42c -[RCTPlatform constantsToExport] + 32
12  React                               0x00000001068f2440 -[RCTModuleData gatherConstantsAndSignalJSRequireEnding:] + 752
13  React                               0x00000001068f26c4 -[RCTModuleData exportedConstants] + 40
14  React                               0x00000001068fd6e8 _ZN8facebook5react15RCTNativeModule12getConstantsEv + 200
15  cxxreact                            0x00000001090e55d0 _ZN8facebook5react14ModuleRegistry9getConfigERKNSt3__112basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEE + 1280
16  jsireact                            0x0000000108fb742c _ZN8facebook5react16JSINativeModules12createModuleERNS_3jsi7RuntimeERKNSt3__112basic_stringIcNS5_11char_traitsIcEENS5_9allocatorIcEEEE + 188
17  jsireact                            0x0000000108fb7120 _ZN8facebook5react16JSINativeModules9getModuleERNS_3jsi7RuntimeERKNS2_10PropNameIDE + 332
18  jsireact                            0x0000000108f9ff88 _ZN8facebook5react11JSIExecutor17NativeModuleProxy3getERNS_3jsi7RuntimeERKNS3_10PropNameIDE + 292
19  reacthermes                         0x0000000109478644 _ZN8facebook3jsi19DecoratedHostObject3getERNS0_7RuntimeERKNS0_10PropNameIDE + 92
20  hermes                              0x0000000109edb344 _ZN8facebook6hermes17HermesRuntimeImpl8JsiProxy3getEN6hermes2vm8SymbolIDE + 88
21  hermes                              0x0000000109fc5590 _ZN6hermes2vm8JSObject27getComputedWithReceiver_RJSENS0_6HandleIS1_EERNS0_7RuntimeENS2_INS0_11HermesValueEEES7_ + 712
22  hermes                              0x0000000109fb0e90 _ZN6hermes2vm11Interpreter17interpretFunctionILb0ELb0EEENS0_10CallResultINS0_11HermesValueELNS0_6detail20CallResultSpecializeE2EEERNS0_7RuntimeERNS0_16InterpreterStateE + 10024
23  hermes                              0x0000000109fae734 _ZN6hermes2vm7Runtime21interpretFunctionImplEPNS0_9CodeBlockE + 132
24  hermes                              0x0000000109fe92d8 _ZN6hermes2vm7Runtime11runBytecodeEONSt3__110shared_ptrINS_3hbc14BCProviderBaseEEENS0_18RuntimeModuleFlagsEN4llvh9StringRefENS0_6HandleINS0_11EnvironmentEEENSB_INS0_11HermesValueEEE + 1420
25  hermes                              0x0000000109ecde7c _ZN8facebook6hermes17HermesRuntimeImpl26evaluatePreparedJavaScriptERKNSt3__110shared_ptrIKNS_3jsi18PreparedJavaScriptEEE + 220
26  hermes                              0x0000000109ecdd04 _ZN8facebook6hermes17HermesRuntimeImpl31evaluateJavaScriptWithSourceMapERKNSt3__110shared_ptrIKNS_3jsi6BufferEEES9_RKNS2_12basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEE + 116
27  hermes                              0x0000000109ecec9c _ZN8facebook6hermes17HermesRuntimeImpl18evaluateJavaScriptERKNSt3__110shared_ptrIKNS_3jsi6BufferEEERKNS2_12basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEE + 32
28  reacthermes                         0x0000000109476514 _ZN8facebook3jsi16RuntimeDecoratorINS0_7RuntimeES2_E18evaluateJavaScriptERKNSt3__110shared_ptrIKNS0_6BufferEEERKNS4_12basic_stringIcNS4_11char_traitsIcEENS4_9allocatorIcEEEE + 64
29  reacthermes                         0x00000001094736f4 _ZN8facebook3jsi20WithRuntimeDecoratorINS_5react12_GLOBAL
Main Thread Checker: UI API called on a background thread: -[UIScene activationState]
PID: 91600, TID: 2326173, Thread name: com.facebook.react.JavaScript, Queue name: com.apple.root.default-qos.overcommit, QoS: 0
Backtrace:
4   React                               0x000000010695c808 RCTKeyWindow + 348
5   React                               0x0000000106942a44 -[RCTTraitCollectionProxy init] + 120
6   React                               0x00000001069429ac __41+[RCTTraitCollectionProxy sharedInstance]_block_invoke + 36
7   libdispatch.dylib                   0x0000000107bd65d0 _dispatch_client_callout + 16
8   libdispatch.dylib                   0x0000000107bd8088 _dispatch_once_callout + 84
9   React                               0x0000000106942960 +[RCTTraitCollectionProxy sharedInstance] + 88
10  CoreModules                         0x000000010538c488 -[RCTPlatform getConstants] + 80
11  CoreModules                         0x000000010538c42c -[RCTPlatform constantsToExport] + 32
12  React                               0x00000001068f2440 -[RCTModuleData gatherConstantsAndSignalJSRequireEnding:] + 752
13  React                               0x00000001068f26c4 -[RCTModuleData exportedConstants] + 40
14  React                               0x00000001068fd6e8 _ZN8facebook5react15RCTNativeModule12getConstantsEv + 200
15  cxxreact                            0x00000001090e55d0 _ZN8facebook5react14ModuleRegistry9getConfigERKNSt3__112basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEE + 1280
16  jsireact                            0x0000000108fb742c _ZN8facebook5react16JSINativeModules12createModuleERNS_3jsi7RuntimeERKNSt3__112basic_stringIcNS5_11char_traitsIcEENS5_9allocatorIcEEEE + 188
17  jsireact                            0x0000000108fb7120 _ZN8facebook5react16JSINativeModules9getModuleERNS_3jsi7RuntimeERKNS2_10PropNameIDE + 332
18  jsireact                            0x0000000108f9ff88 _ZN8facebook5react11JSIExecutor17NativeModuleProxy3getERNS_3jsi7RuntimeERKNS3_10PropNameIDE + 292
19  reacthermes                         0x0000000109478644 _ZN8facebook3jsi19DecoratedHostObject3getERNS0_7RuntimeERKNS0_10PropNameIDE + 92
20  hermes                              0x0000000109edb344 _ZN8facebook6hermes17HermesRuntimeImpl8JsiProxy3getEN6hermes2vm8SymbolIDE + 88
21  hermes                              0x0000000109fc5590 _ZN6hermes2vm8JSObject27getComputedWithReceiver_RJSENS0_6HandleIS1_EERNS0_7RuntimeENS2_INS0_11HermesValueEEES7_ + 712
22  hermes                              0x0000000109fb0e90 _ZN6hermes2vm11Interpreter17interpretFunctionILb0ELb0EEENS0_10CallResultINS0_11HermesValueELNS0_6detail20CallResultSpecializeE2EEERNS0_7RuntimeERNS0_16InterpreterStateE + 10024
23  hermes                              0x0000000109fae734 _ZN6hermes2vm7Runtime21interpretFunctionImplEPNS0_9CodeBlockE + 132
24  hermes                              0x0000000109fe92d8 _ZN6hermes2vm7Runtime11runBytecodeEONSt3__110shared_ptrINS_3hbc14BCProviderBaseEEENS0_18RuntimeModuleFlagsEN4llvh9StringRefENS0_6HandleINS0_11EnvironmentEEENSB_INS0_11HermesValueEEE + 1420
25  hermes                              0x0000000109ecde7c _ZN8facebook6hermes17HermesRuntimeImpl26evaluatePreparedJavaScriptERKNSt3__110shared_ptrIKNS_3jsi18PreparedJavaScriptEEE + 220
26  hermes                              0x0000000109ecdd04 _ZN8facebook6hermes17HermesRuntimeImpl31evaluateJavaScriptWithSourceMapERKNSt3__110shared_ptrIKNS_3jsi6BufferEEES9_RKNS2_12basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEE + 116
27  hermes                              0x0000000109ecec9c _ZN8facebook6hermes17HermesRuntimeImpl18evaluateJavaScriptERKNSt3__110shared_ptrIKNS_3jsi6BufferEEERKNS2_12basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEE + 32
28  reacthermes                         0x0000000109476514 _ZN8facebook3jsi16RuntimeDecoratorINS0_7RuntimeES2_E18evaluateJavaScriptERKNSt3__110shared_ptrIKNS0_6BufferEEERKNS4_12basic_stringIcNS4_11char_traitsIcEENS4_9allocatorIcEEEE + 64
29  reacthermes                         0x00000001094736f4 _ZN8facebook3jsi20WithRuntimeDecoratorINS_5react12_GLOBAL
=================================================================
Main Thread Checker: UI API called on a background thread: -[UIWindowScene keyWindow]
PID: 91600, TID: 2326173, Thread name: com.facebook.react.JavaScript, Queue name: com.apple.root.default-qos.overcommit, QoS: 0
Backtrace:
4   React                               0x000000010695c968 RCTKeyWindow + 700
5   React                               0x0000000106942a44 -[RCTTraitCollectionProxy init] + 120
6   React                               0x00000001069429ac __41+[RCTTraitCollectionProxy sharedInstance]_block_invoke + 36
7   libdispatch.dylib                   0x0000000107bd65d0 _dispatch_client_callout + 16
8   libdispatch.dylib                   0x0000000107bd8088 _dispatch_once_callout + 84
9   React                               0x0000000106942960 +[RCTTraitCollectionProxy sharedInstance] + 88
10  CoreModules                         0x000000010538c488 -[RCTPlatform getConstants] + 80
11  CoreModules                         0x000000010538c42c -[RCTPlatform constantsToExport] + 32
12  React                               0x00000001068f2440 -[RCTModuleData gatherConstantsAndSignalJSRequireEnding:] + 752
13  React                               0x00000001068f26c4 -[RCTModuleData exportedConstants] + 40
14  React                               0x00000001068fd6e8 _ZN8facebook5react15RCTNativeModule12getConstantsEv + 200
15  cxxreact                            0x00000001090e55d0 _ZN8facebook5react14ModuleRegistry9getConfigERKNSt3__112basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEE + 1280
16  jsireact                            0x0000000108fb742c _ZN8facebook5react16JSINativeModules12createModuleERNS_3jsi7RuntimeERKNSt3__112basic_stringIcNS5_11char_traitsIcEENS5_9allocatorIcEEEE + 188
17  jsireact                            0x0000000108fb7120 _ZN8facebook5react16JSINativeModules9getModuleERNS_3jsi7RuntimeERKNS2_10PropNameIDE + 332
18  jsireact                            0x0000000108f9ff88 _ZN8facebook5react11JSIExecutor17NativeModuleProxy3getERNS_3jsi7RuntimeERKNS3_10PropNameIDE + 292
19  reacthermes                         0x0000000109478644 _ZN8facebook3jsi19DecoratedHostObject3getERNS0_7RuntimeERKNS0_10PropNameIDE + 92
20  hermes                              0x0000000109edb344 _ZN8facebook6hermes17HermesRuntimeImpl8JsiProxy3getEN6hermes2vm8SymbolIDE + 88
21  hermes                              0x0000000109fc5590 _ZN6hermes2vm8JSObject27getComputedWithReceiver_RJSENS0_6HandleIS1_EERNS0_7RuntimeENS2_INS0_11HermesValueEEES7_ + 712
22  hermes                              0x0000000109fb0e90 _ZN6hermes2vm11Interpreter17interpretFunctionILb0ELb0EEENS0_10CallResultINS0_11HermesValueELNS0_6detail20CallResultSpecializeE2EEERNS0_7RuntimeERNS0_16InterpreterStateE + 10024
23  hermes                              0x0000000109fae734 _ZN6hermes2vm7Runtime21interpretFunctionImplEPNS0_9CodeBlockE + 132
24  hermes                              0x0000000109fe92d8 _ZN6hermes2vm7Runtime11runBytecodeEONSt3__110shared_ptrINS_3hbc14BCProviderBaseEEENS0_18RuntimeModuleFlagsEN4llvh9StringRefENS0_6HandleINS0_11EnvironmentEEENSB_INS0_11HermesValueEEE + 1420
25  hermes                              0x0000000109ecde7c _ZN8facebook6hermes17HermesRuntimeImpl26evaluatePreparedJavaScriptERKNSt3__110shared_ptrIKNS_3jsi18PreparedJavaScriptEEE + 220
26  hermes                              0x0000000109ecdd04 _ZN8facebook6hermes17HermesRuntimeImpl31evaluateJavaScriptWithSourceMapERKNSt3__110shared_ptrIKNS_3jsi6BufferEEES9_RKNS2_12basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEE + 116
27  hermes                              0x0000000109ecec9c _ZN8facebook6hermes17HermesRuntimeImpl18evaluateJavaScriptERKNSt3__110shared_ptrIKNS_3jsi6BufferEEERKNS2_12basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEE + 32
28  reacthermes                         0x0000000109476514 _ZN8facebook3jsi16RuntimeDecoratorINS0_7RuntimeES2_E18evaluateJavaScriptERKNSt3__110shared_ptrIKNS0_6BufferEEERKNS4_12basic_stringIcNS4_11char_traitsIcEENS4_9allocatorIcEEEE + 64
29  reacthermes                         0x00000001094736f4 _ZN8facebook3jsi20WithRuntimeDecoratorINS_5react12_GLOBAL
Main Thread Checker: UI API called on a background thread: -[UIWindowScene keyWindow]
PID: 91600, TID: 2326173, Thread name: com.facebook.react.JavaScript, Queue name: com.apple.root.default-qos.overcommit, QoS: 0
Backtrace:
4   React                               0x000000010695c968 RCTKeyWindow + 700
5   React                               0x0000000106942a44 -[RCTTraitCollectionProxy init] + 120
6   React                               0x00000001069429ac __41+[RCTTraitCollectionProxy sharedInstance]_block_invoke + 36
7   libdispatch.dylib                   0x0000000107bd65d0 _dispatch_client_callout + 16
8   libdispatch.dylib                   0x0000000107bd8088 _dispatch_once_callout + 84
9   React                               0x0000000106942960 +[RCTTraitCollectionProxy sharedInstance] + 88
10  CoreModules                         0x000000010538c488 -[RCTPlatform getConstants] + 80
11  CoreModules                         0x000000010538c42c -[RCTPlatform constantsToExport] + 32
12  React                               0x00000001068f2440 -[RCTModuleData gatherConstantsAndSignalJSRequireEnding:] + 752
13  React                               0x00000001068f26c4 -[RCTModuleData exportedConstants] + 40
14  React                               0x00000001068fd6e8 _ZN8facebook5react15RCTNativeModule12getConstantsEv + 200
15  cxxreact                            0x00000001090e55d0 _ZN8facebook5react14ModuleRegistry9getConfigERKNSt3__112basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEE + 1280
16  jsireact                            0x0000000108fb742c _ZN8facebook5react16JSINativeModules12createModuleERNS_3jsi7RuntimeERKNSt3__112basic_stringIcNS5_11char_traitsIcEENS5_9allocatorIcEEEE + 188
17  jsireact                            0x0000000108fb7120 _ZN8facebook5react16JSINativeModules9getModuleERNS_3jsi7RuntimeERKNS2_10PropNameIDE + 332
18  jsireact                            0x0000000108f9ff88 _ZN8facebook5react11JSIExecutor17NativeModuleProxy3getERNS_3jsi7RuntimeERKNS3_10PropNameIDE + 292
19  reacthermes                         0x0000000109478644 _ZN8facebook3jsi19DecoratedHostObject3getERNS0_7RuntimeERKNS0_10PropNameIDE + 92
20  hermes                              0x0000000109edb344 _ZN8facebook6hermes17HermesRuntimeImpl8JsiProxy3getEN6hermes2vm8SymbolIDE + 88
21  hermes                              0x0000000109fc5590 _ZN6hermes2vm8JSObject27getComputedWithReceiver_RJSENS0_6HandleIS1_EERNS0_7RuntimeENS2_INS0_11HermesValueEEES7_ + 712
22  hermes                              0x0000000109fb0e90 _ZN6hermes2vm11Interpreter17interpretFunctionILb0ELb0EEENS0_10CallResultINS0_11HermesValueELNS0_6detail20CallResultSpecializeE2EEERNS0_7RuntimeERNS0_16InterpreterStateE + 10024
23  hermes                              0x0000000109fae734 _ZN6hermes2vm7Runtime21interpretFunctionImplEPNS0_9CodeBlockE + 132
24  hermes                              0x0000000109fe92d8 _ZN6hermes2vm7Runtime11runBytecodeEONSt3__110shared_ptrINS_3hbc14BCProviderBaseEEENS0_18RuntimeModuleFlagsEN4llvh9StringRefENS0_6HandleINS0_11EnvironmentEEENSB_INS0_11HermesValueEEE + 1420
25  hermes                              0x0000000109ecde7c _ZN8facebook6hermes17HermesRuntimeImpl26evaluatePreparedJavaScriptERKNSt3__110shared_ptrIKNS_3jsi18PreparedJavaScriptEEE + 220
26  hermes                              0x0000000109ecdd04 _ZN8facebook6hermes17HermesRuntimeImpl31evaluateJavaScriptWithSourceMapERKNSt3__110shared_ptrIKNS_3jsi6BufferEEES9_RKNS2_12basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEE + 116
27  hermes                              0x0000000109ecec9c _ZN8facebook6hermes17HermesRuntimeImpl18evaluateJavaScriptERKNSt3__110shared_ptrIKNS_3jsi6BufferEEERKNS2_12basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEE + 32
28  reacthermes                         0x0000000109476514 _ZN8facebook3jsi16RuntimeDecoratorINS0_7RuntimeES2_E18evaluateJavaScriptERKNSt3__110shared_ptrIKNS0_6BufferEEERKNS4_12basic_stringIcNS4_11char_traitsIcEENS4_9allocatorIcEEEE + 64
29  reacthermes                         0x00000001094736f4 _ZN8facebook3jsi20WithRuntimeDecoratorINS_5react12_GLOBAL
=================================================================
Main Thread Checker: UI API called on a background thread: -[UIWindow traitCollection]
PID: 91600, TID: 2326173, Thread name: com.facebook.react.JavaScript, Queue name: com.apple.root.default-qos.overcommit, QoS: 0
Backtrace:
4   React                               0x0000000106942a64 -[RCTTraitCollectionProxy init] + 152
5   React                               0x00000001069429ac __41+[RCTTraitCollectionProxy sharedInstance]_block_invoke + 36
6   libdispatch.dylib                   0x0000000107bd65d0 _dispatch_client_callout + 16
7   libdispatch.dylib                   0x0000000107bd8088 _dispatch_once_callout + 84
8   React                               0x0000000106942960 +[RCTTraitCollectionProxy sharedInstance] + 88
9   CoreModules                         0x000000010538c488 -[RCTPlatform getConstants] + 80
10  CoreModules                         0x000000010538c42c -[RCTPlatform constantsToExport] + 32
11  React                               0x00000001068f2440 -[RCTModuleData gatherConstantsAndSignalJSRequireEnding:] + 752
12  React                               0x00000001068f26c4 -[RCTModuleData exportedConstants] + 40
13  React                               0x00000001068fd6e8 _ZN8facebook5react15RCTNativeModule12getConstantsEv + 200
14  cxxreact                            0x00000001090e55d0 _ZN8facebook5react14ModuleRegistry9getConfigERKNSt3__112basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEE + 1280
15  jsireact                            0x0000000108fb742c _ZN8facebook5react16JSINativeModules12createModuleERNS_3jsi7RuntimeERKNSt3__112basic_stringIcNS5_11char_traitsIcEENS5_9allocatorIcEEEE + 188
16  jsireact                            0x0000000108fb7120 _ZN8facebook5react16JSINativeModules9getModuleERNS_3jsi7RuntimeERKNS2_10PropNameIDE + 332
17  jsireact                            0x0000000108f9ff88 _ZN8facebook5react11JSIExecutor17NativeModuleProxy3getERNS_3jsi7RuntimeERKNS3_10PropNameIDE + 292
18  reacthermes                         0x0000000109478644 _ZN8facebook3jsi19DecoratedHostObject3getERNS0_7RuntimeERKNS0_10PropNameIDE + 92
19  hermes                              0x0000000109edb344 _ZN8facebook6hermes17HermesRuntimeImpl8JsiProxy3getEN6hermes2vm8SymbolIDE + 88
20  hermes                              0x0000000109fc5590 _ZN6hermes2vm8JSObject27getComputedWithReceiver_RJSENS0_6HandleIS1_EERNS0_7RuntimeENS2_INS0_11HermesValueEEES7_ + 712
21  hermes                              0x0000000109fb0e90 _ZN6hermes2vm11Interpreter17interpretFunctionILb0ELb0EEENS0_10CallResultINS0_11HermesValueELNS0_6detail20CallResultSpecializeE2EEERNS0_7RuntimeERNS0_16InterpreterStateE + 10024
22  hermes                              0x0000000109fae734 _ZN6hermes2vm7Runtime21interpretFunctionImplEPNS0_9CodeBlockE + 132
23  hermes                              0x0000000109fe92d8 _ZN6hermes2vm7Runtime11runBytecodeEONSt3__110shared_ptrINS_3hbc14BCProviderBaseEEENS0_18RuntimeModuleFlagsEN4llvh9StringRefENS0_6HandleINS0_11EnvironmentEEENSB_INS0_11HermesValueEEE + 1420
24  hermes                              0x0000000109ecde7c _ZN8facebook6hermes17HermesRuntimeImpl26evaluatePreparedJavaScriptERKNSt3__110shared_ptrIKNS_3jsi18PreparedJavaScriptEEE + 220
25  hermes                              0x0000000109ecdd04 _ZN8facebook6hermes17HermesRuntimeImpl31evaluateJavaScriptWithSourceMapERKNSt3__110shared_ptrIKNS_3jsi6BufferEEES9_RKNS2_12basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEE + 116
26  hermes                              0x0000000109ecec9c _ZN8facebook6hermes17HermesRuntimeImpl18evaluateJavaScriptERKNSt3__110shared_ptrIKNS_3jsi6BufferEEERKNS2_12basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEE + 32
27  reacthermes                         0x0000000109476514 _ZN8facebook3jsi16RuntimeDecoratorINS0_7RuntimeES2_E18evaluateJavaScriptERKNSt3__110shared_ptrIKNS0_6BufferEEERKNS4_12basic_stringIcNS4_11char_traitsIcEENS4_9allocatorIcEEEE + 64
28  reacthermes                         0x00000001094736f4 _ZN8facebook3jsi20WithRuntimeDecoratorINS_5react12_GLOBAL__N_115ReentrancyCheckENS0_7RuntimeES5_E18evaluateJavaScriptERKNSt3__110share
Main Thread Checker: UI API called on a background thread: -[UIWindow traitCollection]
PID: 91600, TID: 2326173, Thread name: com.facebook.react.JavaScript, Queue name: com.apple.root.default-qos.overcommit, QoS: 0
Backtrace:
4   React                               0x0000000106942a64 -[RCTTraitCollectionProxy init] + 152
5   React                               0x00000001069429ac __41+[RCTTraitCollectionProxy sharedInstance]_block_invoke + 36
6   libdispatch.dylib                   0x0000000107bd65d0 _dispatch_client_callout + 16
7   libdispatch.dylib                   0x0000000107bd8088 _dispatch_once_callout + 84
8   React                               0x0000000106942960 +[RCTTraitCollectionProxy sharedInstance] + 88
9   CoreModules                         0x000000010538c488 -[RCTPlatform getConstants] + 80
10  CoreModules                         0x000000010538c42c -[RCTPlatform constantsToExport] + 32
11  React                               0x00000001068f2440 -[RCTModuleData gatherConstantsAndSignalJSRequireEnding:] + 752
12  React                               0x00000001068f26c4 -[RCTModuleData exportedConstants] + 40
13  React                               0x00000001068fd6e8 _ZN8facebook5react15RCTNativeModule12getConstantsEv + 200
14  cxxreact                            0x00000001090e55d0 _ZN8facebook5react14ModuleRegistry9getConfigERKNSt3__112basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEE + 1280
15  jsireact                            0x0000000108fb742c _ZN8facebook5react16JSINativeModules12createModuleERNS_3jsi7RuntimeERKNSt3__112basic_stringIcNS5_11char_traitsIcEENS5_9allocatorIcEEEE + 188
16  jsireact                            0x0000000108fb7120 _ZN8facebook5react16JSINativeModules9getModuleERNS_3jsi7RuntimeERKNS2_10PropNameIDE + 332
17  jsireact                            0x0000000108f9ff88 _ZN8facebook5react11JSIExecutor17NativeModuleProxy3getERNS_3jsi7RuntimeERKNS3_10PropNameIDE + 292
18  reacthermes                         0x0000000109478644 _ZN8facebook3jsi19DecoratedHostObject3getERNS0_7RuntimeERKNS0_10PropNameIDE + 92
19  hermes                              0x0000000109edb344 _ZN8facebook6hermes17HermesRuntimeImpl8JsiProxy3getEN6hermes2vm8SymbolIDE + 88
20  hermes                              0x0000000109fc5590 _ZN6hermes2vm8JSObject27getComputedWithReceiver_RJSENS0_6HandleIS1_EERNS0_7RuntimeENS2_INS0_11HermesValueEEES7_ + 712
21  hermes                              0x0000000109fb0e90 _ZN6hermes2vm11Interpreter17interpretFunctionILb0ELb0EEENS0_10CallResultINS0_11HermesValueELNS0_6detail20CallResultSpecializeE2EEERNS0_7RuntimeERNS0_16InterpreterStateE + 10024
22  hermes                              0x0000000109fae734 _ZN6hermes2vm7Runtime21interpretFunctionImplEPNS0_9CodeBlockE + 132
23  hermes                              0x0000000109fe92d8 _ZN6hermes2vm7Runtime11runBytecodeEONSt3__110shared_ptrINS_3hbc14BCProviderBaseEEENS0_18RuntimeModuleFlagsEN4llvh9StringRefENS0_6HandleINS0_11EnvironmentEEENSB_INS0_11HermesValueEEE + 1420
24  hermes                              0x0000000109ecde7c _ZN8facebook6hermes17HermesRuntimeImpl26evaluatePreparedJavaScriptERKNSt3__110shared_ptrIKNS_3jsi18PreparedJavaScriptEEE + 220
25  hermes                              0x0000000109ecdd04 _ZN8facebook6hermes17HermesRuntimeImpl31evaluateJavaScriptWithSourceMapERKNSt3__110shared_ptrIKNS_3jsi6BufferEEES9_RKNS2_12basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEE + 116
26  hermes                              0x0000000109ecec9c _ZN8facebook6hermes17HermesRuntimeImpl18evaluateJavaScriptERKNSt3__110shared_ptrIKNS_3jsi6BufferEEERKNS2_12basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEE + 32
27  reacthermes                         0x0000000109476514 _ZN8facebook3jsi16RuntimeDecoratorINS0_7RuntimeES2_E18evaluateJavaScriptERKNSt3__110shared_ptrIKNS0_6BufferEEERKNS4_12basic_stringIcNS4_11char_traitsIcEENS4_9allocatorIcEEEE + 64
28  reacthermes                         0x00000001094736f4 _ZN8facebook3jsi20WithRuntimeDecoratorINS_5react12_GLOBAL__N_115ReentrancyCheckENS0_7RuntimeES5_E18evaluateJavaScriptERKNSt3__110share
=================================================================
Main Thread Checker: UI API called on a background thread: -[UIView bounds]
PID: 91600, TID: 2326173, Thread name: com.facebook.react.JavaScript, Queue name: com.apple.root.default-qos.overcommit, QoS: 0
Backtrace:
4   React                               0x00000001068dc7bc -[RCTKeyWindowValuesProxy init] + 196
5   React                               0x00000001068dc6d8 __41+[RCTKeyWindowValuesProxy sharedInstance]_block_invoke + 36
6   libdispatch.dylib                   0x0000000107bd65d0 _dispatch_client_callout + 16
7   libdispatch.dylib                   0x0000000107bd8088 _dispatch_once_callout + 84
8   React                               0x00000001068dc68c +[RCTKeyWindowValuesProxy sharedInstance] + 88
9   CoreModules                         0x0000000105369ce8 -[RCTDeviceInfo init] + 124
10  React                               0x00000001068ef440 __115-[RCTModuleData initWithModuleClass:bridge:moduleRegistry:viewRegistry_DEPRECATED:bundleManager:callableJSModules:]_block_invoke + 36
11  React                               0x00000001068efca4 -[RCTModuleData setUpInstanceAndBridge:] + 1440
12  React                               0x00000001068f1e40 -[RCTModuleData instance] + 1168
13  React                               0x00000001068f2300 -[RCTModuleData gatherConstantsAndSignalJSRequireEnding:] + 432
14  React                               0x00000001068f26c4 -[RCTModuleData exportedConstants] + 40
15  React                               0x00000001068fd6e8 _ZN8facebook5react15RCTNativeModule12getConstantsEv + 200
16  cxxreact                            0x00000001090e55d0 _ZN8facebook5react14ModuleRegistry9getConfigERKNSt3__112basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEE + 1280
17  jsireact                            0x0000000108fb742c _ZN8facebook5react16JSINativeModules12createModuleERNS_3jsi7RuntimeERKNSt3__112basic_stringIcNS5_11char_traitsIcEENS5_9allocatorIcEEEE + 188
18  jsireact                            0x0000000108fb7120 _ZN8facebook5react16JSINativeModules9getModuleERNS_3jsi7RuntimeERKNS2_10PropNameIDE + 332
19  jsireact                            0x0000000108f9ff88 _ZN8facebook5react11JSIExecutor17NativeModuleProxy3getERNS_3jsi7RuntimeERKNS3_10PropNameIDE + 292
20  reacthermes                         0x0000000109478644 _ZN8facebook3jsi19DecoratedHostObject3getERNS0_7RuntimeERKNS0_10PropNameIDE + 92
21  hermes                              0x0000000109edb344 _ZN8facebook6hermes17HermesRuntimeImpl8JsiProxy3getEN6hermes2vm8SymbolIDE + 88
22  hermes                              0x0000000109fc5590 _ZN6hermes2vm8JSObject27getComputedWithReceiver_RJSENS0_6HandleIS1_EERNS0_7RuntimeENS2_INS0_11HermesValueEEES7_ + 712
23  hermes                              0x0000000109fb0e90 _ZN6hermes2vm11Interpreter17interpretFunctionILb0ELb0EEENS0_10CallResultINS0_11HermesValueELNS0_6detail20CallResultSpecializeE2EEERNS0_7RuntimeERNS0_16InterpreterStateE + 10024
24  hermes                              0x0000000109fae734 _ZN6hermes2vm7Runtime21interpretFunctionImplEPNS0_9CodeBlockE + 132
25  hermes                              0x0000000109fe92d8 _ZN6hermes2vm7Runtime11runBytecodeEONSt3__110shared_ptrINS_3hbc14BCProviderBaseEEENS0_18RuntimeModuleFlagsEN4llvh9StringRefENS0_6HandleINS0_11EnvironmentEEENSB_INS0_11HermesValueEEE + 1420
26  hermes                              0x0000000109ecde7c _ZN8facebook6hermes17HermesRuntimeImpl26evaluatePreparedJavaScriptERKNSt3__110shared_ptrIKNS_3jsi18PreparedJavaScriptEEE + 220
27  hermes                              0x0000000109ecdd04 _ZN8facebook6hermes17HermesRuntimeImpl31evaluateJavaScriptWithSourceMapERKNSt3__110shared_ptrIKNS_3jsi6BufferEEES9_RKNS2_12basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEE + 116
28  hermes                              0x0000000109ecec9c _ZN8facebook6hermes17HermesRuntimeImpl18evaluateJavaScriptERKNSt3__110shared_ptrIKNS_3jsi6BufferEEERKNS2_12basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEE + 32
29  reacthermes                         0x0000000109476514 _ZN8facebook3jsi16RuntimeDecoratorINS0_7RuntimeES2_E18evaluateJavaScriptERKNSt3__110shar
Main Thread Checker: UI API called on a background thread: -[UIView bounds]
PID: 91600, TID: 2326173, Thread name: com.facebook.react.JavaScript, Queue name: com.apple.root.default-qos.overcommit, QoS: 0
Backtrace:
4   React                               0x00000001068dc7bc -[RCTKeyWindowValuesProxy init] + 196
5   React                               0x00000001068dc6d8 __41+[RCTKeyWindowValuesProxy sharedInstance]_block_invoke + 36
6   libdispatch.dylib                   0x0000000107bd65d0 _dispatch_client_callout + 16
7   libdispatch.dylib                   0x0000000107bd8088 _dispatch_once_callout + 84
8   React                               0x00000001068dc68c +[RCTKeyWindowValuesProxy sharedInstance] + 88
9   CoreModules                         0x0000000105369ce8 -[RCTDeviceInfo init] + 124
10  React                               0x00000001068ef440 __115-[RCTModuleData initWithModuleClass:bridge:moduleRegistry:viewRegistry_DEPRECATED:bundleManager:callableJSModules:]_block_invoke + 36
11  React                               0x00000001068efca4 -[RCTModuleData setUpInstanceAndBridge:] + 1440
12  React                               0x00000001068f1e40 -[RCTModuleData instance] + 1168
13  React                               0x00000001068f2300 -[RCTModuleData gatherConstantsAndSignalJSRequireEnding:] + 432
14  React                               0x00000001068f26c4 -[RCTModuleData exportedConstants] + 40
15  React                               0x00000001068fd6e8 _ZN8facebook5react15RCTNativeModule12getConstantsEv + 200
16  cxxreact                            0x00000001090e55d0 _ZN8facebook5react14ModuleRegistry9getConfigERKNSt3__112basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEE + 1280
17  jsireact                            0x0000000108fb742c _ZN8facebook5react16JSINativeModules12createModuleERNS_3jsi7RuntimeERKNSt3__112basic_stringIcNS5_11char_traitsIcEENS5_9allocatorIcEEEE + 188
18  jsireact                            0x0000000108fb7120 _ZN8facebook5react16JSINativeModules9getModuleERNS_3jsi7RuntimeERKNS2_10PropNameIDE + 332
19  jsireact                            0x0000000108f9ff88 _ZN8facebook5react11JSIExecutor17NativeModuleProxy3getERNS_3jsi7RuntimeERKNS3_10PropNameIDE + 292
20  reacthermes                         0x0000000109478644 _ZN8facebook3jsi19DecoratedHostObject3getERNS0_7RuntimeERKNS0_10PropNameIDE + 92
21  hermes                              0x0000000109edb344 _ZN8facebook6hermes17HermesRuntimeImpl8JsiProxy3getEN6hermes2vm8SymbolIDE + 88
22  hermes                              0x0000000109fc5590 _ZN6hermes2vm8JSObject27getComputedWithReceiver_RJSENS0_6HandleIS1_EERNS0_7RuntimeENS2_INS0_11HermesValueEEES7_ + 712
23  hermes                              0x0000000109fb0e90 _ZN6hermes2vm11Interpreter17interpretFunctionILb0ELb0EEENS0_10CallResultINS0_11HermesValueELNS0_6detail20CallResultSpecializeE2EEERNS0_7RuntimeERNS0_16InterpreterStateE + 10024
24  hermes                              0x0000000109fae734 _ZN6hermes2vm7Runtime21interpretFunctionImplEPNS0_9CodeBlockE + 132
25  hermes                              0x0000000109fe92d8 _ZN6hermes2vm7Runtime11runBytecodeEONSt3__110shared_ptrINS_3hbc14BCProviderBaseEEENS0_18RuntimeModuleFlagsEN4llvh9StringRefENS0_6HandleINS0_11EnvironmentEEENSB_INS0_11HermesValueEEE + 1420
26  hermes                              0x0000000109ecde7c _ZN8facebook6hermes17HermesRuntimeImpl26evaluatePreparedJavaScriptERKNSt3__110shared_ptrIKNS_3jsi18PreparedJavaScriptEEE + 220
27  hermes                              0x0000000109ecdd04 _ZN8facebook6hermes17HermesRuntimeImpl31evaluateJavaScriptWithSourceMapERKNSt3__110shared_ptrIKNS_3jsi6BufferEEES9_RKNS2_12basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEE + 116
28  hermes                              0x0000000109ecec9c _ZN8facebook6hermes17HermesRuntimeImpl18evaluateJavaScriptERKNSt3__110shared_ptrIKNS_3jsi6BufferEEERKNS2_12basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEE + 32
29  reacthermes                         0x0000000109476514
```

## Changelog:

[IOS] [FIXED] - Call RCTInitializeUIKitProxies before bridge create

Pull Request resolved: https://github.com/facebook/react-native/pull/49776

Test Plan:
Run RNTester in bridge mode. no UI main thread checker issue.

1. Test Headset pairing through Twilight app.
2. Test going to Horizon Worlds

|pictures of successful pairing| going into Horizon world|
|{F1975774792}{F1975774799}|{F1975774801}

Reviewed By: cipolleschi

Differential Revision: D70557608

Pulled By: sammy-SC

fbshipit-source-id: 2cbc09e126dc6f942a63b966ff32ff5801a24ec3
2025-03-06 05:15:43 -08:00
2025-02-27 03:13:26 -08:00
2025-03-04 21:35:46 -08:00
2023-09-12 09:21:08 -07:00
2025-02-27 03:13:26 -08:00
2025-02-27 03:13:26 -08:00

React Native

Learn once, write anywhere:
Build mobile apps with React.

React Native is released under the MIT license. Current npm package version. PRs welcome! Follow @reactnative

Getting Started · Learn the Basics · Showcase · Contribute · Community · Support

React Native brings React's declarative UI framework to iOS and Android. With React Native, you use native UI controls and have full access to the native platform.

  • Declarative. React makes it painless to create interactive UIs. Declarative views make your code more predictable and easier to debug.
  • Component-Based. Build encapsulated components that manage their state, then compose them to make complex UIs.
  • Developer Velocity. See local changes in seconds. Changes to JavaScript code can be live reloaded without rebuilding the native app.
  • Portability. Reuse code across iOS, Android, and other platforms.

React Native is developed and supported by many companies and individual core contributors. Find out more in our ecosystem overview.

Contents

📋 Requirements

React Native apps may target iOS 15.1 and Android 7.0 (API 24) or newer. You may use Windows, macOS, or Linux as your development operating system, though building and running iOS apps is limited to macOS. Tools like Expo can be used to work around this.

🎉 Building your first React Native app

Follow the Getting Started guide. The recommended way to install React Native depends on your project. Here you can find short guides for the most common scenarios:

📖 Documentation

The full documentation for React Native can be found on our website.

The React Native documentation discusses components, APIs, and topics that are specific to React Native. For further documentation on the React API that is shared between React Native and React DOM, refer to the React documentation.

The source for the React Native documentation and website is hosted on a separate repository, @facebook/react-native-website.

🚀 Upgrading

Upgrading to new versions of React Native may give you access to more APIs, views, developer tools, and other goodies. See the Upgrading Guide for instructions.

React Native releases are discussed in this discussion repo.

👏 How to Contribute

The main purpose of this repository is to continue evolving React Native core. We want to make contributing to this project as easy and transparent as possible, and we are grateful to the community for contributing bug fixes and improvements. Read below to learn how you can take part in improving React Native.

Code of Conduct

Facebook has adopted a Code of Conduct that we expect project participants to adhere to. Please read the full text so that you can understand what actions will and will not be tolerated.

Contributing Guide

Read our Contributing Guide to learn about our development process, how to propose bugfixes and improvements, and how to build and test your changes to React Native.

Open Source Roadmap

You can learn more about our vision for React Native in the Roadmap.

Good First Issues

We have a list of good first issues that contain bugs which have a relatively limited scope. This is a great place to get started, gain experience, and get familiar with our contribution process.

Discussions

Larger discussions and proposals are discussed in @react-native-community/discussions-and-proposals.

📄 License

React Native is MIT licensed, as found in the LICENSE file.

React Native documentation is Creative Commons licensed, as found in the LICENSE-docs file.

Languages
C++ 33%
Kotlin 20%
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Objective-C++ 11.5%
Objective-C 7.1%
Other 9.7%