在ios中以编程方式单击UIImageView上的Event

Question

我在这里显示代码的图像是代码

UIImageView *preArrowImage =[[UIImageView alloc]init ];
preArrowImage.image =[UIImage imageNamed:@"arrowprev.png"];
preArrowImage.frame = CGRectMake(20, 60, 10, 30);
[self.view addSubview:preArrowImage];

我想以编程方式处理preArrowImage上的触摸事件.

Answer 1

Objective-C的

UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapDetected)];
singleTap.numberOfTapsRequired = 1;
[preArrowImage setUserInteractionEnabled:YES];
[preArrowImage addGestureRecognizer:singleTap];

-(void)tapDetected{
    NSLog(@"single Tap on imageview");
  }

SWIFT 4.2

let preArrowImage : UIImageView // also give it frame
let singleTap = UITapGestureRecognizer(target: self, action: #selector(tapDetected))
preArrowImage.isUserInteractionEnabled = true
preArrowImage.addGestureRecognizer(singleTap)

//Action
@objc func tapDetected() {
    print("Imageview Clicked")
}

Answer 2

只需UITapGesture在图像上添加一个,但请记住启用UserInteraction.

    UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self 
    action:@selector(singleTapGestureCaptured:)];
    [preArrowImage addGestureRecognizer:singleTap];
    [preArrowImage setMultipleTouchEnabled:YES];
    [preArrowImage setUserInteractionEnabled:YES];

Answer 3

现在在Swift！

let singleTap = UITapGestureRecognizer(target: self, action: Selector("tapDetected"))
singleTap.numberOfTapsRequired = 1

preArrowImage.userInteractionEnabled = true
preArrowImage.addGestureRecognizer(singleTap)


//Action
func tapDetected() {
    println("Single Tap on imageview")
}