当尝试将事件从Obj-C发送到JS时，reactTag为nil

Question

当我尝试将事件从Obj-C原生UI组件发送到JS时，有人知道reactTag为nil为UIScrollView的原因吗？对于一个按钮，一切正常。 @implementation RCTTouchablePhotoViewManager

RCT_EXPORT_MODULE();

RCT_EXPORT_VIEW_PROPERTY(onTouchCustom, RCTDirectEventBlock);

- (TappableImageView *)imageView {
 if (!_imageView) {
   _imageView = [[TappableImageView alloc] initWithFrame:CGRectZero];
   _imageView.delegate = self;
   _imageView.userInteractionEnabled = YES;
   _imageView.contentMode = UIViewContentModeScaleAspectFit;
   [self.scrollView addSubview:_imageView];
 }
 return _imageView;
}

- (UIReactScrollView *)scrollView {
 if (!_scrollView) {
   _scrollView = [[UIReactScrollView alloc] init];
   _scrollView.delegate = self;
   _scrollView.minimumZoomScale = 0.2;
   _scrollView.maximumZoomScale = 4.0;
 }
 return _scrollView;
}

- (UIView *)view {
 return self.scrollView;
}

...

@end



// UIReactScrollView.h

@interface UIReactScrollView : UIScrollView

@property (nonatomic, copy) RCTDirectEventBlock onTouchCustom;

@end