swift camera overlay查看

我是一个新手，我正在尝试制作一个简单的应用程序，可以让您拍摄一张照片，然后在相机上以较不透明的方式查看它。一切似乎很好，但overlayView放大，我找不到原因。我该怎么做才能让相机上的overlayView显示整张照片？这里是我的代码：swift camera overlay查看

import UIKit 

class ViewController: UIViewController, 
UIImagePickerControllerDelegate, UINavigationControllerDelegate { 
@IBOutlet var pickedImage: UIImageView! 

var array = [UIImage]() 
var temp = UIImage() 

override func viewDidLoad() { 
    super.viewDidLoad() 
    // Do any additional setup after loading the view, typically from a nib. 
} 

override func didReceiveMemoryWarning() { 
    super.didReceiveMemoryWarning() 
    // Dispose of any resources that can be recreated. 
} 


@IBAction func photoLibrary(_ sender: UIButton) { 
    if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.photoLibrary){ 
     let imagePicker = UIImagePickerController() 
     imagePicker.delegate = self 
     imagePicker.sourceType = UIImagePickerControllerSourceType.photoLibrary; 
     imagePicker.allowsEditing = true 
     self.present(imagePicker, animated: true,completion: nil) 


    } 
} 
@IBAction func saveButton(_ sender: UIButton) { 
    let imageData = UIImageJPEGRepresentation(pickedImage.image!, 0.5) 
    let compressedJPEGImage = UIImage(data: imageData!) 

    UIImageWriteToSavedPhotosAlbum(compressedJPEGImage!, nil, nil, nil) 
    array.append(compressedJPEGImage!) 


} 
@IBAction func cameraButton(_ sender: UIButton) { 

    if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.camera) 
    { 
     let imagePicker = UIImagePickerController() 
     imagePicker.delegate = self 
     imagePicker.sourceType = UIImagePickerControllerSourceType.camera 
     ; 

     imagePicker.allowsEditing = false 

     self.present(imagePicker, animated: true,completion: nil) 
     //------------------------------------------------------------------- 
    // let screenSize: CGRect = UIScreen.main.bounds 

     let overlayView = UIImageView(frame: imagePicker.cameraOverlayView!.frame) 
     let crosshairLabel = UIImageView() 


     if array.count >= 1{ 

      var overlayViewInt = array.count - 1 
      crosshairLabel.image = array[overlayViewInt] 
     } else { 
      crosshairLabel.image = UIImage(named: "camera") 

     } 

     overlayView.bounds = UIScreen.main.bounds 


     crosshairLabel.alpha = 0.4 
     crosshairLabel.translatesAutoresizingMaskIntoConstraints = false 
     overlayView.addSubview(crosshairLabel) 

     crosshairLabel.centerXAnchor.constraint(equalTo: overlayView.centerXAnchor).isActive = true 
     crosshairLabel.centerYAnchor.constraint(equalTo: overlayView.centerYAnchor).isActive = true 

     // To avoid blocking the underneath default camera controls 
     overlayView.isUserInteractionEnabled = false 

     imagePicker.cameraOverlayView = overlayView 
     //------------------------------------------------------------------- 

    } 
} 
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingImage image: UIImage!, editingInfo: [NSObject: AnyObject]!) { 
    pickedImage.image = image 
    self.dismiss(animated: true, completion: nil) 
} 

}

来源

2017-07-24 Rytis Razmus

这是不是很清楚什么视图应该实际显示图像，但我认为这是'crosshairLabel'。您需要添加宽度和高度约束：

crosshairLabel.heightAnchor.constraint(equalTo: overlayView.heightAnchor, multiplier: 1.0).isActive = true 
crosshairLabel.widthAnchor.constraint(equalTo: overlayView.widthAnchor, multiplier: 1.0).isActive = true

来源

2017-07-24 19:50:37

非常感谢！现在，该应用按我的意愿工作。 –

swift camera overlay查看

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