ios - didFinishPickingMediaWithInfo 未调用

Question

我有一个 UITableViewCell 按钮可以拍摄图像并将其放回单元格中。当我调用 UIImagePickerController 并拍摄图像时，它不会调用以下委托(delegate):

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject], sender:AnyObject)

这是我在 UITableViewController 中的 takePhotoFunction:

@IBAction func takePhoto(sender: AnyObject) {
let imagePickerController = UIImagePickerController()
imagePickerController.delegate = self
imagePickerController.allowsEditing = true

let actionSheet = UIAlertController(title: "Choose image souruce", message: nil, preferredStyle: UIAlertControllerStyle.ActionSheet)

actionSheet.addAction(UIAlertAction(title: "Take Image", style: UIAlertActionStyle.Default, handler: { (alert:UIAlertAction!) -> Void in
    imagePickerController.sourceType = UIImagePickerControllerSourceType.Camera
    self.presentViewController(imagePickerController, animated: true, completion: nil)
}))

actionSheet.addAction(UIAlertAction(title: "Photo Library", style: UIAlertActionStyle.Default, handler: { (alert:UIAlertAction!) -> Void in
    imagePickerController.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
    self.presentViewController(imagePickerController, animated: true, completion: nil)
}))
actionSheet.addAction(UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel, handler: nil))
self.presentViewController(actionSheet, animated: true, completion: nil)}

Answer 1

在 Swift 3 中，这个委托(delegate)方法现在被称为:

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any])

区别是:

1. 选择器前有一个下划线_
2. 末尾的信息类型从 [String : AnyObject] 更改为 [String : Any]

我遇到了同样的问题，当我进行这些更改时它起作用了。