选择“照相机”会因信号9而终止

Question

在iOS SWIFT3.1中，我试图访问相机，就像我在其他应用程序中成功地做的那样。然而，在这个特定的应用程序中，它总是在self.present(imagePicker, animated: true, completion: nil)行上崩溃。控制台中的消息是Message from debugger: Terminated due to signal 9。这通常表示与内存相关的错误吗？

@IBAction func onChooseImageClick(_ sender: AnyObject) {
    if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.savedPhotosAlbum){

        let imagePicker = UIImagePickerController()
        imagePicker.delegate = self

        //Create the AlertController and add Its action like button in Actionsheet
        let actionSheetControllerForImage: UIAlertController = UIAlertController(title: "Please select", message: "Option to select", preferredStyle: .actionSheet)

        let cancelActionButton: UIAlertAction = UIAlertAction(title: "Cancel", style: .cancel) { action -> Void in
            print("Cancel")
        }
        actionSheetControllerForImage.addAction(cancelActionButton)

        let cameraActionButton: UIAlertAction = UIAlertAction(title: "Camera", style: .default)
        { action -> Void in
            print("Camera")
            if(UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.camera)) {
                imagePicker.sourceType = UIImagePickerControllerSourceType.camera
                let mediaTypes:[String] = [kUTTypeImage as String]
                imagePicker.mediaTypes = mediaTypes
                imagePicker.allowsEditing = false

                self.present(imagePicker, animated: true, completion: nil)
            } else {
                let alertController = UIAlertController(title: "error", message: "Camera not found!", preferredStyle: .alert)

                let OKAction = UIAlertAction(title: "OK", style: .cancel) { action in
                    // ...
                }
                alertController.addAction(OKAction)

                self.present(alertController, animated: true)
            }
        }
        actionSheetControllerForImage.addAction(cameraActionButton)

        let galleryActionButton: UIAlertAction = UIAlertAction(title: "Image Gallery", style: .default)
        { action -> Void in
            imagePicker.sourceType = UIImagePickerControllerSourceType.savedPhotosAlbum;
            imagePicker.allowsEditing = false
            self.present(imagePicker, animated: true, completion: nil)
        }
        actionSheetControllerForImage.popoverPresentationController?.sourceView = self.view
        actionSheetControllerForImage.addAction(galleryActionButton)
   ===> self.present(actionSheetControllerForImage, animated: true, completion: nil)
    }
}

Answer 1

您需要在您的plist文件中的字符串，解释为什么您的应用程序需要许可使用相机。在iOS 10 - Changes in asking permissions of Camera, microphone and Photo Library causing application to crash的问题中有一个关于这些字符串的很好的总结，您可以在https://stackoverflow.com/a/40734360/968577的答案中复制一个列表

如果没有所需的字符串，您的应用程序将以这种方式崩溃。但是，控制台输出将解释问题所在。

Answer 2

试着这样做，我希望这会有帮助！首先在info.plist中添加这两点

1. 私隐相机使用说明
2. 隐私-照片库使用说明

将这两个委托添加到类文件中。

1. UIImagePickerControllerDelegate
2. UINavigationControllerDelegate @IBAction (_onclickImageAction: Any){ print("onclickImageAction方法在这里调用“)让imagePicker = UIImagePickerController() imagePicker.delegate = self imagePicker.isEditing = false let =UIAlertController(标题：”selected“，message：”，preferredStyle: UIAlertControllerStyle.actionSheet)让libButton =UIAlertAction(标题：“从库中选择照片”，样式: UIAlertActionStyle.default){ (libSelected) ){(LibSelected)在打印(“库被选中”) imagePicker.sourceType =onclickImageAction self.present(libSelected，动画: true :true)，完成:0)} actionSheet.addAction(libButton)让cameraButton =UIAlertAction(标题：“拍照”，样式: UIAlertActionStyle.default) { (camSelected)在if { imagePicker.sourceType = UIImagePickerControllerSourceType.camera self.present(imagePicker，动画:真，完成:0)}cameraButton{actionSheet.dismiss(动画:假，完成:零)让警报=UIAlertController(标题：“错误”，消息：“没有可用的照相机”，preferredStyle：.alert) alert.addAction(标题：“is”，样式：.default，处理程序：{ (alertAction) in alert.dismiss(动画:真，完成:零)}(CameraButton)让cancelButton =UIAlertAction(标题：“取消”，样式: UIAlertActionStyle.cancel) { (cancelSelected)在打印(“cancel selected") } actionSheet.addAction(cancelButton)让albumButton =UIAlertAction(标题：”已保存的相册“，style: UIAlertActionStyle.default) { (albumSelected) {(AlbumSelected)在打印(”相册选定“) imagePicker.sourceType =actionSheet.addAction self.present(imagePicker，动画:真，完成:0)} actionSheet.addAction(albumButton) self.present(actionSheet，动画:真，完成:0)}self.present

实现这些委托方法

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any])
{if let PickedImage = info[UIImagePickerControllerOriginalImage] as? UIImage
        {
            yourimageview.image = PickedImage
            dismiss(animated: true, completion: nil)   
        }
    }

Answer 3

打开相机设置时，我刚刚添加了exit(0)。很好用