Question

在iOS Swift 3.1中我试图访问相机，就像我在其他应用程序中成功完成一样。但是，在这个特定的应用程序中，它始终在self.present(imagePicker, animated: true, completion: nil)行崩溃。控制台中的消息为Message from debugger: Terminated due to signal 9。这通常会发出与内存相关的错误信号吗？

@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

您的plist文件中需要一个字符串，用于说明您的应用需要使用相机的权限。在iOS 10 - Changes in asking permissions of Camera, microphone and Photo Library causing application to crash的问题中对这些字符串进行了很好的总结，您可以在https://stackoverflow.com/a/40734360/968577的答案中复制一个列表

如果没有必要的字符串，您的应用就会以这种方式崩溃。但是，控制台输出将解释问题所在。

Answer 2

尝试这样我希望它会有所帮助！首先在info.plist中添加这两点

隐私权 - 相机使用说明
隐私 - 照片库使用说明

在类文件中添加这两个代理

UIImagePickerControllerDelegate

UINavigationControllerDelegate

 @IBAction func onclickImageAction(_ sender: Any){

print("onclickImageAction method called here")
let imagePicker = UIImagePickerController()
imagePicker.delegate = self
imagePicker.isEditing = false

let actionSheet =  UIAlertController(title: "Select Profile Photo", message: "", preferredStyle: UIAlertControllerStyle.actionSheet)

let libButton = UIAlertAction(title: "Select photo from library", style: UIAlertActionStyle.default){ (libSelected) in
    print("library selected")


    imagePicker.sourceType = UIImagePickerControllerSourceType.photoLibrary
    self.present(imagePicker, animated: true, completion: nil)
}
actionSheet.addAction(libButton)
let cameraButton = UIAlertAction(title: "Take a picture", style: UIAlertActionStyle.default) { (camSelected) in

    if (UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.camera))
    {
        imagePicker.sourceType = UIImagePickerControllerSourceType.camera
        self.present(imagePicker, animated: true, completion: nil)
    }
    else
    {
        actionSheet.dismiss(animated: false, completion: nil)
        let alert = UIAlertController(title: "Error", message: "There is no camera available", preferredStyle: .alert)
        alert.addAction(UIAlertAction(title: "Okay", style: .default, handler: { (alertAction) in

            alert.dismiss(animated: true, completion: nil)
        }))

    }

}
actionSheet.addAction(cameraButton)
let cancelButton = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.cancel) { (cancelSelected) in

    print("cancel selected")

}
actionSheet.addAction(cancelButton)
let albumButton = UIAlertAction(title: "Saved Album", style: UIAlertActionStyle.default) { (albumSelected) in

    print("Album selected")

    imagePicker.sourceType = UIImagePickerControllerSourceType.savedPhotosAlbum
    self.present(imagePicker, animated: true, completion: nil)

}
actionSheet.addAction(albumButton)
self.present(actionSheet, animated: true, completion:nil)
}

实施这些委托方法

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

当我打开相机设置时，我刚刚添加了exit（0）。它工作正常

选择＆＃34;相机＆＃34;由于信号9导致终止

3 个答案: