Question

我正在尝试将UITapGestureRecogniser添加到我为UIImagePickerController创建的覆盖视图中。但是没有检测到水龙头。以下是我的代码：

 //Setting up image picker controller
 let imagePicker = UIImagePickerController()
 imagePicker.delegate = self
 imagePicker.sourceType = .camera
 imagePicker.showsCameraControls = false

 //Setting up the tap gesture
 let tapGesture = UITapGestureRecognizer(target: self, action: #selector(self.cropImageAroundTap(sender:)))
 tapGesture.delegate = self

 //Setting up overlay view
 let overlayView = UIView.init(frame: self.view.frame)
 overlayView.isOpaque = false
 overlayView.isUserInteractionEnabled = true
 overlayView.backgroundColor = UIColor.clear
 overlayView.addGestureRecognizer(tapGesture)

 imagePicker.cameraOverlayView = overlayView
 self.present(imagePicker, animated: true, completion: nil )

如果我将手势识别器添加到imagePicker.view，那么相机控制的部分会检测水龙头而不是预览窗口。以下是我检测水龙头的功能：

func cropImageAroundTap(sender: UITapGestureRecognizer) {

     if sender.state == .ended {

       NSLog("hello")
     }

}

有没有办法检测预览窗口上的点击？

Answer 1

我能够在图像选择器的预览视图中检测到轻击手势，而不是设置：

 imagePicker.cameraOverlayView = overlayView

我将overlayView添加为imagePicker的子视图

 imagePicker.view.addSubview(overlayView)

如何识别ImagePickerController（）中叠加视图上的TapGesture？

1 个答案: