ios - removeFromSuperview UIImageView 不工作

Question

我正在尝试使用以下代码从现有 View 中删除图像:

-(void) deleteImage:(int)imageID{

//[self.imageArray removeObjectAtIndex:imageID];
//remove the image from the screen
for (UIView* view in self.view.subviews) {
    if ([view isKindOfClass:[UIImageView class]] && [view tag] == imageID) {
        //could be a bug here with the re-Ordering of the array (could add a helper method to reset all the tags on screen when this is called
        NSLog(@"view %@", view);
        //[self.imageArray removeObjectAtIndex:imageID];
        [view removeFromSuperview];
    }
  }
}

NSLog 输出以下内容:

view <UIImageView: 0x18b8d7b0; frame = (0 0; 768 2016); autoresize = RM+BM; userInteractionEnabled = NO; layer = <CALayer: 0x18b8d890>>

我遇到的问题是它似乎正在获取 ImageView 但它没有删除它。

Answer 1

由于您正在尝试修改用户界面，因此您必须在主线程上进行。因此，请执行以下操作:

dispatch_async(dispatch_get_main_queue(), ^{
    [view removeFromSuperview];
});