From 933356e2a605d9abc423eebc91bd84132875cb56 Mon Sep 17 00:00:00 2001
From: zhongwuzw <zhongwuzw@qq.com>
Date: Tue, 19 Nov 2024 14:06:20 -0800
Subject: [PATCH] Fabric: Fixes custom font of weight is not honored (#47691)

Summary:
Fixes https://github.com/facebook/react-native/issues/47656 .

## Changelog:

[IOS] [FIXED] - Fabric: Fixes custom font of weight is not honored

Pull Request resolved: https://github.com/facebook/react-native/pull/47691

Test Plan: Demo in https://github.com/facebook/react-native/issues/47656

Reviewed By: cipolleschi

Differential Revision: D66174732

Pulled By: javache

fbshipit-source-id: 5e6a8c870d3a13283548c736aed73193f7976bfc
---
 .../ios/react/renderer/textlayoutmanager/RCTFontUtils.mm | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/packages/react-native/ReactCommon/react/renderer/textlayoutmanager/platform/ios/react/renderer/textlayoutmanager/RCTFontUtils.mm b/packages/react-native/ReactCommon/react/renderer/textlayoutmanager/platform/ios/react/renderer/textlayoutmanager/RCTFontUtils.mm
index e6169c664a0..5f744790a94 100644
--- a/packages/react-native/ReactCommon/react/renderer/textlayoutmanager/platform/ios/react/renderer/textlayoutmanager/RCTFontUtils.mm
+++ b/packages/react-native/ReactCommon/react/renderer/textlayoutmanager/platform/ios/react/renderer/textlayoutmanager/RCTFontUtils.mm
@@ -170,12 +170,15 @@ UIFont *RCTFontWithFontProperties(RCTFontProperties fontProperties)
       // Gracefully handle being given a font name rather than font family, for
       // example: "Helvetica Light Oblique" rather than just "Helvetica".
       font = [UIFont fontWithName:fontProperties.family size:effectiveFontSize];
-
-      if (!font) {
+      if (font) {
+        fontNames = [UIFont fontNamesForFamilyName:font.familyName];
+      } else {
         // Failback to system font.
         font = [UIFont systemFontOfSize:effectiveFontSize weight:fontProperties.weight];
       }
-    } else {
+    }
+
+    if (fontNames.count > 0) {
       // Get the closest font that matches the given weight for the fontFamily
       CGFloat closestWeight = INFINITY;
       for (NSString *name in fontNames) {