iOS7相机选取器从相机获取照片时被冻结

Question

iOS7相机选取器从相机获取照片时被冻结

iosxamarin.iosuiimagepickercontrollerxamarin

4

我有一个相机视图控制器的简单代码：

UIImagePickerController picker = new UIImagePickerController();
picker.PrefersStatusBarHidden ();
picker.SourceType = UIImagePickerControllerSourceType.Camera;
UIImagePickerControllerCameraDevice dev = picker.CameraDevice;
PresentViewController (picker, false, null);
picker.FinishedPickingMedia += (object sender, UIImagePickerMediaPickedEventArgs e) => BeginInvokeOnMainThread (delegate {DismissViewController (false, null);});

我的应用程序启动时，我可以正常拍照，但是当我再次打开选择器时，相机视图出现，但是来自上一个拍摄的帧（图像）显示并冻结。如果我移动设备，图像不会改变。换句话说，我只能使用一次相机，但我不能使用两次。我做错了什么？在iOS6设备上，它完美地工作。

- milan.rancic

1个回答

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- Florian Schaal · Accepted Answer

我的建议是创建一个PickerDelegate类来解决问题。你只需要在构造函数中传递当前的VC，这样你就可以在VC中处理图像。 PickerDelegate是指选择器代理类。

private class pickerDelegate : UIImagePickerControllerDelegate
        {
            private yourVC _vc;

            public pickerDelegate (yourVC controller) : base ()
            {
                _vc = controller;
            }

            public override void FinishedPickingImage (UIImagePickerController picker, UIImage image, NSDictionary editingInfo)
            {
               //Do something whit the image
                _vc.someButton.SetBackgroundImage (image, UIControlState.Normal);

                //Dismiss the pickerVC
                picker.DismissViewController (true, null);
            }
        }

ViewDidLoad

imagePicker = new UIImagePickerController ();

//Set the Delegate and pass the current VC
imagePicker.Delegate = new pickerDelegate (this);