ios - 适用于iOS 8中iPhone的UIPopoverController显示白屏

在iphone的ios8.0以下使用UIPopovercontroller可以很好地与此代码一起使用。但是在ios8中，它显示白屏。

代码 :

pickerController = [[UIViewController alloc] init];
UIView *viewV = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 150, 160)];
[viewV setBackgroundColor:[UIColor clearColor]];
popOverController = [[UIPopoverController alloc] initWithContentViewController:pickerController];
popOverController.popoverContentSize = CGSizeMake(150, 160);
[popOverController setDelegate:self];

CGRect ImageBtnFrame = [self.view convertRect:sender.frame fromView:self.view];
[popOverController presentPopoverFromRect:ImageBtnFrame inView:self.view permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];

ios8的任何替代方法，都需要建议。

最佳答案

尝试将新的iOS 8 API用于弹出窗口。

pickerController = [[UIViewController alloc] init];
UIView *viewV = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 150, 160)];
[viewV setBackgroundColor:[UIColor clearColor]];

UIPopoverPresentationController *popOverController = pickerController .popoverPresentationController;
popOverController.popoverContentSize = CGSizeMake(150, 160);
[popOverController setDelegate:self];

popOverController.sourceView = self.view;
popOverController.sourceRect = sender.frame;
popOverController.permittedArrowDirections = UIPopoverArrowDirectionUp;

[self presentViewController:popOverController
                     animated:YES
                   completion:nil];