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Param Aggarwal
0f2d8e662e
Summary: The `ScrollView` sends important `updatedChildFrames` data to the `ListView` to be able to implement `onChangeVisibleRows` method. Coalescing operates very strongly on older devices like the iPhone 4s where this data is then lost. Fixes #1782. `ListView` has a method called `onChangeVisibleRows` that is called whenever the rows visible on screen change. This method is critical to be able to implement deletion/creation of views and hence be conservative in memory usage. I have an infinite scrolling view which uses this method to only render the full rows for what is visible on screen and put placeholders for everything else. In the `RCTEventDispatcher`, we [coalesce events](https://github.com/facebook/react-native/blob/522fd33d6f3c8fb339b0dde35b05df34c1233306/React/Base/RCTEventDispatcher.m#L135-L152) that are meant to be sent across the bridge. They are [dequeued](https://github.com/facebook/react-native/blob/522fd33d6f3c8fb339b0dde35b05df34c1233306/React/Base/RCTEventDispatcher.m#L180-L188) on each Closes https://github.com/facebook/react-native/pull/1783 Github Author: Param Aggarwal <paramaggarwal@gmail.com>