Question

标题为，在iOS8中，[UIPopoverController presentPopoverFromRect]不再适用于[UIApplication sharedApplication] .keyWindow。（它在iOS7中工作）

我验证了以下代码：

TestViewController *test = [[TestViewController alloc] initWithNibName:nil bundle:nil];

if (testPopoverController == nil) {
    testPopoverController = [[UIPopoverController alloc] initWithContentViewController:test];
    testPopoverController.popoverContentSize = CGSizeMake(250, 95*5);


}

CGPoint point = [sender convertPoint:CGPointMake(0, 0) toView:nil];
CGRect rect = CGRectMake(point.x, point.y, 24, 24);

[testPopoverController presentPopoverFromRect:rect inView:[UIApplication sharedApplication].keyWindow permittedArrowDirections:UIPopoverArrowDirectionDown animated:YES];

Answer 1

我提出的最佳解决方案是有条件地处理它。如果在iOS 7上，使用我们在关键窗口上呈现UIPopoverController的工作代码。如果在iOS 8上，请使用以下内容：

     viewController.modalPresentationStyle = UIModalPresentationPopover;
     UIPopoverPresentationController *presentationController = viewController.popoverPresentationController;
     [presentationController setDelegate:self];
     presentationController.permittedArrowDirections = 0;
     presentationController.sourceView = [[UIApplication sharedApplication] keyWindow];
     presentationController.sourceRect = [[UIApplication sharedApplication] keyWindow].bounds;

     [viewController setPreferredContentSize:CGSizeMake(320, 480)];
     [parentController presentViewController:viewController animated:YES completion:nil];

这最终与以下功能完全相同：

     self.popoverController = [[UIPopoverController alloc] initWithContentViewController:viewController];
     [self.popoverController setDelegate:self];
     [self.popoverController setPopoverContentSize:isLandscape() ? CGSizeMake(480*2, 320*2) : CGSizeMake(320*2, 480*2)];
     [self.padPopover presentPopoverFromRect:CGSizeMake(320, 480)
                                      inView:[[UIApplication sharedApplication] keyWindow]
                    permittedArrowDirections:0
                                    animated:YES];

Answer 2

更改

中的inView参数

[testPopoverController presentPopoverFromRect:rect inView:[UIApplication sharedApplication].keyWindow permittedArrowDirections:UIPopoverArrowDirectionDown animated:YES];

到

[testPopoverController presentPopoverFromRect:rect inView:"your current View Controller's view" permittedArrowDirections:UIPopoverArrowDirectionDown animated:YES];

确保它在调度块中

  dispatch_async(dispatch_get_main_queue(), ^{

}）;

如果它在范围内

，也可以改变你的矩形原点n大小值

Answer 3

尝试此链接中的解决方案：http://github.com/werner77/WEPopover

1，让我们来做这段代码：

if ([viewController respondsToSelector:@selector(setPreferredContentSize:)]) {
    viewController.preferredContentSize = CGSizeMake(200, 300.0f);
} else {
    viewController.contentSizeForViewInPopover = CGSizeMake(200.0f, 300.0f);
}

self.popoverController = [[popoverClass alloc] initWithContentViewController:viewController];

if ([self.popoverController respondsToSelector:@selector(setContainerViewProperties:)]) {
    [self.popoverController setContainerViewProperties:[self improvedContainerViewProperties]];
}

self.popoverController.delegate = self;

[self.popoverController presentPopoverFromRect:[sender bounds]
      inView:sender
      permittedArrowDirections:UIPopoverArrowDirectionUp
      animated:YES];

我希望这会有所帮助。它已经过测试，适用于iOS6-iOS8。

PS。不要忘记检查viewDidLoad，并感谢WEPopover库。

Answer 4

我认为你必须在全视图/ viewcontroller中显示它，而不是在[UIApplication sharedApplication] .keyWindow

中显示它

所以改变这段代码：

[testPopoverController presentPopoverFromRect:rect inView:[UIApplication sharedApplication].keyWindow permittedArrowDirections:UIPopoverArrowDirectionDown animated:YES];

为：

[testPopoverController presentPopoverFromRect:rect inView:aViewControllerInYourApp permittedArrowDirections:UIPopoverArrowDirectionDown animated:YES];

在iOS8中：UIPopoverController presentPopoverFromRect不再适用于keyWindow

4 个答案: