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Morgan Pretty authored
Summary: Currently the RCTActionSheetManager attempts to present itself from the 'rootViewController' of the key window, presenting a modal from a view controller which is already presenting a modal is not allowed on iOS and this fails with the following error appearing in the XCode debugger (but not the chrome debugger): ``` Warning: Attempt to present <UIAlertController: 0x7fca85b14f40> on <UINavigationController: 0x7fca84812000> whose view is not in the window hierarchy! ``` This change recursively looks through modally presented view controllers until it finds the top one and then uses that to present the action sheet. Closes https://github.com/facebook/react-native/pull/5263 Reviewed By: svcscm Differential Revision: D2823201 Pulled By: nicklockwood fb-gh-sync-id: aad1ad88115563f633fd9aaea8e27d1d155a6c27
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