装相机还是用PhotoLibrary装UIImagePickerController？

Question

最近，我在iOS 10上的Swift 3中添加了一些代码，可以在Swift 3中拍摄一张照片，或者选择一张照片。当我调用打开的相机或照片库时，我的应用程序会以"Thread 14: signal SIGABRT“的方式崩溃，而没有其他迹象显示正在发生什么。对我来说，据我所调试，这是否发生在试图加载本机相机视图或照片库时。任何帮助都将不胜感激！

代码如下：

class CameraViewController: UIViewController, UINavigationControllerDelegate, UIImagePickerControllerDelegate {

@IBOutlet weak var imageView: UIImageView!


var imagePicker = UIImagePickerController()

override func viewDidLoad() {
    super.viewDidLoad()
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
}


@IBAction func BTN_takePhoto(_ sender: AnyObject) {

    print("button pressed")

    if (UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.camera)){

        print("source available")
        //imagePicker =  UIImagePickerController()
        print(1)
        imagePicker.delegate = self
        print(2)
        imagePicker.sourceType = UIImagePickerControllerSourceType.camera
        print(3)
        imagePicker.mediaTypes = [kUTTypeImage as String]
        print(4)
        imagePicker.allowsEditing = true
        print(5)
        self.present(imagePicker, animated: true, completion: nil)
        print(6)
    }
    else {
        print("ERROR: source not available")
        NSLog("No Camera")
        let alert = UIAlertController(title: "No camera", message: "Please allow this app the use of your camera in settings or buy a device that has a camera.", preferredStyle: UIAlertControllerStyle.alert)
        alert.addAction(UIAlertAction(title: "Dismiss", style: UIAlertActionStyle.default, handler: nil))
        self.present(alert, animated: true, completion: nil)
    }
}

@IBAction func BTN_pickFromLibrary(_ sender: AnyObject) {

    imagePicker.allowsEditing = false //2
    imagePicker.sourceType = UIImagePickerControllerSourceType.photoLibrary //3
    present(imagePicker, animated: true, completion: nil)//4


}


func imagePickerController(imagePicker: UIImagePickerController, didFinishPickingMediaWithInfo info: NSDictionary!) {
    NSLog("Received image from camera")
    let mediaType = info[UIImagePickerControllerMediaType] as! String
    var originalImage:UIImage?, editedImage:UIImage?, imageToSave:UIImage?
    let compResult:CFComparisonResult = CFStringCompare(mediaType as NSString!, kUTTypeImage, CFStringCompareFlags.compareCaseInsensitive)
    if ( compResult == CFComparisonResult.compareEqualTo ) {

        editedImage = info[UIImagePickerControllerEditedImage] as! UIImage?
        originalImage = info[UIImagePickerControllerOriginalImage] as! UIImage?

        if ( editedImage != nil ) {
            imageToSave = editedImage
        } else {
            imageToSave = originalImage
        }
        imageView.image = imageToSave
        imageView.reloadInputViews()
    }
    imagePicker.dismiss(animated: true, completion: nil)
}

func imagePickerControllerDidCancel(picker: UIImagePickerController) {
    imagePicker.dismiss(animated: true, completion: nil)
}


/*
private func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
    imagePicker.dismiss(animated: true, completion: nil)
    imageView.image = info[UIImagePickerControllerOriginalImage] as? UIImage
}
*/

}

Answer 1

您必须从Info.plist 10开始在iOS中添加一个键

<key>NSPhotoLibraryUsageDescription</key>
<string>Use Photos</string>

​

​

有关更多详细信息，请查看此链接