UIImageView 触摸事件

Question

我想在触摸名为（image1）的uiimageview时调用我的按钮单击事件。放置在uiview（view1）中的Imageview。

这是我的代码：

- (IBAction)buttonClicked:(id)sender
{

 myTimer = [NSTimer scheduledTimerWithTimeInterval:2.0 target:self selector:@selector(alphabutt:) userInfo:nil repeats:NO];
 }


-(IBAction)alphabutt:(id)sender
{
 NSLog(@"alphabutt!");


 if(i==1)
 {
  NSLog(@"i==1");
  [image1 setImage:[UIImage imageNamed:@"appleimg.jpg"]];
  [view1 addSubview:image1];  
  transition1 = [CATransition animation];

  transition1.duration = 0.75;

  transition1.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];

  transition1.type=kCATransitionReveal;
  transition1.subtype=kCATransitionFromRight;
  transitioning = YES;
  transition1.delegate = self;
  [image1.layer addAnimation:transition1 forKey:nil];  
 }
 if(i==2)
 {
  NSLog(@"i==2");
  [image1 setImage:[UIImage imageNamed:@"boatimg.jpg"]];
  [view1 addSubview:image1];  
  transition2 = [CATransition animation];

  transition2.duration = 0.75;

  transition2.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];

  transition2.type=kCATransitionFade;
  transition2.subtype=kCATransitionFromRight;
  transitioning = YES;
  transition2.delegate = self;
  [image1.layer addAnimation:transition2 forKey:nil];

  i=0;
 }
i++;

}

上面是我在单击按钮时调用 buttonclicked 事件的代码。在 buttonclick 事件中，计时器正在以 2.0 的时间间隔调用 alphabutt（按钮单击事件）。每隔 2.0 调用一次 alphabutt。我想要当我触摸 uiimageview(image1) 时执行此动画，然后它只会调用按钮单击事件 (alphabutt)。 如何为 imageview 编写触摸事件...

请用一些代码简单解释一下执行uiimageview触摸事件...

Answer 1

您可以使用UITapGestureRecognizer 通过addGestureRecognizer 添加到UIImageView

sn-ps：

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

和

- (void)bannerTapped:(UIGestureRecognizer *)gestureRecognizer {
    NSLog(@"%@", [gestureRecognizer view]);
}

Answer 2

在 xib 中启用您的图像视图用户交互（或者如果您以编程方式添加它，则通过代码）并使用 UIResponder 方法 touchesBegan、touchesMoved、touchesEnded 等来检测图像视图上的触摸：

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {

    UITouch *touch = [touches anyObject];

    if ([touch view] == yourImageView)
    {
            //add your code for image touch here 
    }

}

Answer 3

在这里，我向您展示了在 Swift 中实现这一目标的两种可能性：

第一种可能性

import UIKit

class ViewController: UIViewController {
    @IBOutlet var myUIImageView: UIImageView!

    override func viewDidLoad() {
        super.viewDidLoad()
        // You can also manually set it through IB 
        // selecting the UIImageView in the storyboard
        // and checking "User Interaction Enabled" checkbox 
        // in the Attributes Inspector panel.
        self.myUIImageView.userInteractionEnabled = true
    }

    // You can choose to use one of the UIResponder methods:
    // touchesBegan, touchesMoved, touchesEnded etc, in order to detect the touch
    // on the UIImageView.
    override func touchesEnded(touches: Set<UITouch>, withEvent event: UIEvent?) {
       let touch: UITouch? = touches.first
       if touch?.view == myUIImageView {
          println("myUIImageView has been tapped by the user.")
       }
       super.touchesEnded(touches, withEvent: event)
    }
}

第二种可能性

import UIKit

class ViewController: UIViewController {
    @IBOutlet var myUIImageView: UIImageView!

    override func viewDidLoad() {
        super.viewDidLoad()
        let singleTap = UITapGestureRecognizer(target: self, action: "myUIImageViewTapped:")
        singleTap.numberOfTapsRequired = 1 // Initialized to 1 by default
        singleTap.numberOfTouchesRequired = 1 // Initialized to 1 by default
        self.myUIImageView.addGestureRecognizer(singleTap)
        self.myUIImageView.userInteractionEnabled = true
    }

    func myUIImageViewTapped(recognizer: UITapGestureRecognizer) {
        if(recognizer.state == UIGestureRecognizerState.Ended){
            println("myUIImageView has been tapped by the user.")
        }
    }
}

Answer 4

您还可以将UIButton 对象拖放到UIImageView 上。然后在情节提要编辑器中，只需将Custom 类型的UIButton 设置为，使UIButton 不可见。然后像处理任何按钮一样处理click 事件。