Question

我有一个有两个选项的操作表：一个可以从库中选择图像，另一个可以从相机中拍摄照片。照片库功能正常，但我似乎无法让相机工作。

这是我的代码：

let takePhoto = UIAlertAction(title: "Take photo", style: .Default,   handler: {
    (alert: UIAlertAction!) -> Void in
    // present camera taker
    var cameraPicker = UIImagePickerController()
    cameraPicker.delegate = self
    cameraPicker.sourceType = .Camera
    self.presentViewController(cameraPicker, animated: true, completion: nil)   
})

func imagePickerController(picker: UIImagePickerController, didFinishPickingImage image: UIImage!, editingInfo: [NSObject : AnyObject]!) {
    var selectedAvatar = UIImagePickerControllerOriginalImage
    self.dismissViewControllerAnimated(false, completion: nil)
}

我似乎无法找到问题，任何人都可以帮助我吗？当我尝试运行它并单击拍照时，程序崩溃。

Answer 1

您最有可能在模拟器中运行。模拟器没有相机，所以在按下按钮时不要让应用程序崩溃，你必须检查cemera是否可用。

if UIImagePickerController.isSourceTypeAvailable(.Camera) {
    ...
}
else {
    print("Sorry cant take picture")
}

Answer 2

按照以下代码

func takePhoto()
{
  if(UIImagePickerController .isSourceTypeAvailable(UIImagePickerControllerSourceType.Camera))
  {
    picker!.sourceType = UIImagePickerControllerSourceType.Camera
    self .presentViewController(picker!, animated: true, completion: nil)
  }
  else
  {
    let alertWarning = UIAlertView(title:"Warning", message: "You don't have camera", delegate:nil, cancelButtonTitle:"OK", otherButtonTitles:"")
    alertWarning.show()
  }
}
func openGallary()
{
  picker!.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
  self.presentViewController(picker!, animated: true, completion: nil)
}

//PickerView Delegate Methods
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject])
{
  picker .dismissViewControllerAnimated(true, completion: nil)
  imageView.image=info[UIImagePickerControllerOriginalImage] as? UIImage
}
func imagePickerControllerDidCancel(picker: UIImagePickerController)
{
  println("picker cancel.")
}

Answer 3

另一个原因是，当Kirit Modi在下面的步骤中说到相机在真实设备中使用时可能会崩溃：

iOS 10 - App crashes To access photo library or device camera via UIImagePickerController

在iOS 10中。您必须为相机和相机设置隐私设置。图片库。相机＆amp; info.Plist上的照片隐私设置

这解决了我崩溃的问题！

UIImagePickerController摄像头不能正常工作

3 个答案: