IOS8如何移动一个活跃的popover

Question

我为iOS7开发了一个应用程序,现在尝试为iOS8更新它.问题我有以下几点:

应用程序屏幕方向可以旋转,在某些情况下,一些按钮会大幅移动.我有一些指向这些按钮的弹出窗口,所以如果在屏幕旋转时弹出窗口,按钮移动,我也需要弹出窗口.

在iOS7中我通过以下方式做到了这一点:当屏幕旋转时我更新了约束

- (void) updateViewConstraints 
{
    if (UIInterfaceOrientationIsLandscape(self.interfaceOrientation))
    {
        self.Button.constant = (CGFloat)10;
    }
    else
    {
        self.Button.constant = (CGFloat)5;
    }
    [super updateViewConstraints];
} 

我也移动了弹出窗口

- (void) didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation{

    if(TempDisplayPopoverController == examplePopoverController)
    {
        [examplePopoverController presentPopoverFromRect:[self ExamplePopoverPosition] inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
    }
}

我最初加载弹出窗口

- (void) LoadPopover{
    examplePopover = [[examplep alloc] initWithNibName:@"exampleP" bundle:nil];
    [examplePopover setDelegate:self];
    examplePopoverController = [[UIPopoverController alloc] initWithContentViewController: examplePopover];
    [examplePopoverController setDelegate:self];

    examplePopoverController.popoverContentSize = examplePopover.view.frame.size;

    TempDisplayPopoverController = examplePopoverController;


    if ([examplePopoverController isPopoverVisible])
    {
        [examplePopoverController dismissPopoverAnimated:YES];
    }
    else
    {
        [examplePopoverController presentPopoverFromRect:[self ExamplePopoverPosition] inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
    }
}

[self ExamplePopoverPosition] 只返回按钮位置.

这一切都很好,我很高兴,iPad很开心,一切都表现得很好.

现在由于iOS8我必须改变一些位.

self.interfaceOrientation 折旧

[examplePopoverController presentPopoverFromRect:[self ExamplePopoverPosition] inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];

在didRotateFromInterfaceOrientation抛出错误

"Application tried to represent an active popover presentation: <UIPopoverPresentationController: 0x7bf59280>"

我设法纠正self.interfaceOrientation了

- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
{
    [self SetUpScreen:toInterfaceOrientation];
}

- (void) SetUpScreen:(UIInterfaceOrientation)toInterfaceOrientation{
    if (toInterfaceOrientation == UIInterfaceOrientationLandscapeLeft ||
        toInterfaceOrientation == UIInterfaceOrientationLandscapeRight)
    {
        self.Button.constant = (CGFloat)10;
    }
    else
    {
        self.Button.constant = (CGFloat)5;
    }
    [super updateViewConstraints];
}

但不知道如何解决popover问题.我试过了

popoverController: willRepositionPopoverToRect: inView:

但似乎无法让它发挥作用.

谁能建议

谢谢

Answer 1

使用 时popoverController:willRepositionPopoverToRect:inView:，重新分配给rect参数时，请尝试使用：

*rect = myNewRect;

并不是：

rect = &presentingRect;

另外，请确保您已正确分配弹出窗口控制器的委托。