目前导致崩溃的ImagePickerView

Question

这是我的代码，一个简单的类，其中包含一个在storyboard中创建的视图，其中包含一个用于显示imagePickerView的按钮。将呈现imagePickerView，然后应用程序崩溃libc++abi.dylib: terminating with uncaught exception of type NSException

import Foundation
import UIKit


class ImageSelectionView: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {


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

@IBAction func backButtonTapped(_ sender: AnyObject) {
    self.navigationController?.dismiss(animated: true, completion: nil)
}


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


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




}

无法弄清楚这出错的地方，任何帮助都会很棒，谢谢！

Answer 1

要访问照片库，您需要将Privacy - Photo Library Usage Description放入应用程序的.plist文件中，并附上一些说明，

如图所示

特别是在您的代码中，您已编写代码以呈现相同的imagePicker两次，如下所示。

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

因此我建议保留一个，可能是
 present(imagePicker, animated: true, completion: nil)

OR

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

希望它有所帮助。

快乐的编码......

Answer 2

当你调用imagepicker委托方法时，你的语法是错误的，然后一个viewcontroller被预先选择图像所以替换

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

使用

self.presentViewController(imagePicker, animated: true, completion: nil)

并且你没有在你的imageview中显示图像

func imagePickerController(picker: UIImagePickerController, didFinishPickingImage image: UIImage!, editingInfo: [NSObject : AnyObject]!) {
    "YOUR IMAGEVIEW".image = info[UIImagePickerControllerOriginalImage] as? UIImage
    self.dismiss(animated: true, completion: nil);
}

Answer 3

尝试我的代码，您的问题很容易解决。

[value]="todo.title"