什么时候,我从相机捕获图像,然后它在ios7的控制台上给出错误.我首先尝试没有在代码中添加Thread.sleep(3000),但这也无法正常工作.
完整错误：
快照未呈现的视图会导致空快照.确保在屏幕更新后快照或快照之前,您的视图至少呈现过一次.
码：
public override void ViewDidLoad ()
{
base.ViewDidLoad ();
// Perform any additional setup after loading the view,typically from a nib.
PictureFromCameraButton.TouchUpInside += PictureFromCameraButton_Click;
}
private void PictureFromCameraButton_Click (object sender,EventArgs e)
{
try {
Thread.Sleep (4000);
ImagePickerController.SetSourceType(UIImagePickerControllerSourceType.Camera);
this.PresentViewController (ImagePickerController,true,null);
} catch (NotSupportedException exception) {
//Logging Exception in Flurry
FA.Flurry.LogError(exception.GetType().Name,exception.Message,new NSError(NSError.CocoaErrorDomain,3584));
BeginInvokeOnMainThread (() => {
UIAlertView ErrorAlert = new UIAlertView ("Device unsupported","Your device does not support this feature",new UIAlertViewDelegate (),"OK");
ErrorAlert.Show ();
});
} catch (Exception ex) {
//Logging Exception in Flurry
FA.Flurry.LogError(ex.GetType().Name,ex.Message,3584));
this.ShowErrorInProcessingalertView ();
}
}
解决方法
要在iOS 7中解决此问题,这就解决了我的同样错误.
当我呈现UIImagePickerController时,在我的情况下称为imagePickerController
不要使用nil或NULL.相反,我使用下面的代码,打开相机时不再出现错误.
[self presentViewController:imagePickerController animated:YES completion:^{....}];