在iOS中以编程方式单击UIImageView上的事件

我正在显示代码中的图像，这是代码

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touch事件。

目标c

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 / 5

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")
}

只需UITapGesture在图像上添加一个，但要记得使其UserInteraction Enabled。

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

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")
}

迅捷3

在UIImageView上启用UserInterAction

 override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
        super.touchesEnded(touches, with: event)

        if let touch = touches.first {
            if touch.view == self.imgVwPostPreview { //image View property

                //Do your actions
                //self.delegate?.didClickOnCellImageView(indexPath: self.cellIndexPath!)
            }
        }
    }

在视图控制器中使用带有故事的故事板。

选择一个手势识别器后，将其拖到您的控制器上。
现在它将显示在“文档大纲”和视图控制器xib的标题中。

将手势拖动到UILable

在头文件中创建IBAction方法，然后
将其从处理程序拖动到xib中的手势图标

如果您的UIImageView是从情节提要或Nib获得的IBOutlet，则可以将UIGestureRecognizer添加到图像视图，启用用户交互并将IBAction连接到手势识别器。

有关更多信息，请检查我有关以下问题的答案：如何在情节提要板上使UIImageView可单击（快速）

这是另一个选择：作弊。

我的意思是，横向思考。

随心所欲地设置您的UIImage，裁剪，宽高比。

用UIView覆盖它（相等的尺寸，位置等）

将背景设置为clearcolour，将类设置为UIControl。

将内部补齐事件指向您的处理程序，然后瞧。

Xamarin.iOS

UIImageView preArrowImage; // also give it frame
var singleTap = new UITapGestureRecognizer(TapDetected);
singleTap.ShouldReceiveTouch -= TapGesture_ShouldReceiveTouch;
singleTap.ShouldReceiveTouch += TapGesture_ShouldReceiveTouch;
preArrowImage.UserInteractionEnabled = true;
preArrowImage.AddGestureRecognizer(singleTap)

bool TapGesture_ShouldReceiveTouch(UIGestureRecognizer recognizer, UITouch touch)
{
    return true;
}

void TapDetected(UITapGestureRecognizer tapGestureRecognizer)
{
    print("Imageview Clicked")
}