项目中使用react-native 0.63.4版本及一下时，在iOS14中图片不显示。
需要修改一下文件：react-native/Libraries/Image/RCTUIImageViewAnimated.m
原代码：
- (void)displayLayer:(CALayer *)layer {
if (_currentFrame) {
layer.contentsScale = self.animatedImageScale;
layer.contents = (__bridge id)_currentFrame.CGImage;
}
}
修改为：
- (void)displayLayer:(CALayer *)layer {
if (_currentFrame) {
layer.contentsScale = self.animatedImageScale;
layer.contents = (__bridge id)_currentFrame.CGImage;
} else {
[super displayLayer:layer];
}
}
参考内容：https://github.com/facebook/react-native/issues/29279#issuecomment-756515665
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