iOS UIImagePickerController 显示空白页面 [英] iOS UIImagePickerController showed blank page

问题描述

我试图呈现和关闭 UIImagePickerController 的连续性

I tried to present and dismiss the UIImagePickerController continuity

这是我的代码

var imagePicker = UIImagePickerController()
func viewDidLoad() {
    super.viewDidLoad()
    imagePicker.allowsEditing = false
    imagePicker.delegate = self
}

func showImagePickerController() {
    imagePicker.sourceType = .photoLibrary
    present(self.imagePicker, animated: true)
}

// MARK: - UIImagePickerControllerDelegate
private func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String: Any]) {
    if let image = info[UIImagePickerController.InfoKey.originalImage.rawValue] as? UIImage {
        imageViewGroup.image = image
        isChoosePhoto = true
    }
    dismiss(animated: true)
}

结果如下:

这是错误日志:

UIImagePickerController UIViewController 创建错误:错误域=NSCocoaErrorDomain 代码=4099与名为 com.apple.mobileslideshow.photo-picker.viewservice 的服务的连接被中断，但消息是通过附加代理发送的，因此该代理已成为无效的."UserInfo={NSDebugDescription=与名为 com.apple.mobileslideshow.photo-picker.viewservice 的服务的连接中断，但消息是通过其他代理发送的，因此该代理已失效.}

UIImagePickerController UIViewController create error: Error Domain=NSCocoaErrorDomain Code=4099 "The connection to service named com.apple.mobileslideshow.photo-picker.viewservice was interrupted, but the message was sent over an additional proxy and therefore this proxy has become invalid." UserInfo={NSDebugDescription=The connection to service named com.apple.mobileslideshow.photo-picker.viewservice was interrupted, but the message was sent over an additional proxy and therefore this proxy has become invalid.}

那么，我该怎么做才能解决这个问题

So, what should I do to fix this issue

推荐答案

使用 Swift 4，UIImagePicker 有两个先决条件.检查您是否已这样做

Using Swift 4 there are two pre-requisite for the UIImagePicker. Check if you have done that

1) UIImagePickerController 的委托是 UIImagePickerControllerDelegate &UINavigationControllerDelegate 所以需要显式添加 UINavigationControllerDelegate 作为协议之一:

1) The delegate for the UIImagePickerController is UIImagePickerControllerDelegate & UINavigationControllerDelegate so need to explicitly add the UINavigationControllerDelegate as one of the protocols:

class ViewController:UIViewController, UIImagePickerControllerDelegate, 
UINavigationControllerDelegate { .... } 

2) 确保 info.plist 设置了 Privacy - Photo library Usage Description 键和 String 值.

2) Make sure that the info.plist has the Privacy - Photo library Usage Description key and String value set.

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