Objective c 如何取消全屏UIImageView？

当在我的应用程序中单击一个按钮时，我正在创建这样的UIImageView

CGRect screenRect = [[UIScreen mainScreen] bounds];
    CGFloat screenWidth = screenRect.size.width;
    CGFloat screenHeight = screenRect.size.height;

    NSData *imageData = [NSData dataWithContentsOfURL:[NSURL URLWithString:selectedVariantDetail[@"fcVariantImageUrl"]]];

    UIImageView *dot =[[UIImageView alloc] initWithFrame:CGRectMake(0,0,screenWidth,screenHeight)];
    dot.image=[UIImage imageWithData:imageData];
    dot.tag = 2;
    [self.view addSubview:dot];

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但是，当点击同一视图时，如何关闭它？

您可以在

UIImageView

中添加

UIAppgestureRecognitizer

，并在其操作中删除

UIImageView

//Add tap Gesture
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(dismissTapGesture:)];
[dot addGestureRecognizer:tapGesture];
//Set userInteractionEnabled property of imageView to true because by defaults its false
dot.userInteractionEnabled = YES;

现在只需删除

UIImageView

在

UIApgestureRecognitizer

中的操作方法

- (void)dismissTapGesture:(UITapGestureRecognizer*)gesture {
    [gesture.view removeFromSuperview];
}