在 ios 中以编程方式单击 UIImageView 上的 Event

Simply add a UITapGesture on the image but remember to make its UserInteraction Enabled.

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

SWIFT 5

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


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

Objective-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");
}

Using story board with view in view controller.

After selecting one of the gesture recognizer drag it to your controller.
Now it will display in "Document outline" and header of view controller xib.

Drag gesture to UILable

create IBAction method in header file
Now drag it from handler to gesture icon in xib

Now in 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")
}

Swift 3

On UIImageView enable 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!)
}
}
}

If your UIImageView is an IBOutlet which you get from a Storyboard or Nib, you could add a UIGestureRecognizer to the image view, enable user interaction and connect a IBAction to the gesture recognizer.

For more info check my answer on this question: How to you make a UIImageView on the storyboard clickable (swift)

Here's another option: Cheat.

I mean, think laterally.

Set up your UIImage how you want, cropped, aspect fit, whatever.

Overlay this with a UIView (equal dimensions, position etc.)

Set the background to clearcolour, and the class to UIControl.

Point the touch up inside event to your handler, and voila.

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")
}