Question

当iPhone的方向发生变化时，我试图改变UIViews的位置。它类似于this question;但不是3 views，而是{2} views。当iPhone处于纵向模式时，我希望views在另一个上面。在横向模式下，它们应该并排。

所以我尝试了以下方法：

willAnimateRotationToInterfaceOrientation:duration:

但该方法已被弃用。我该怎么做才能检查iPhone的方向何时发生变化？

更新

我尝试了以下内容：感谢@Sean的指导!!

- (void)viewDidLayoutSubviews
{
    [super viewDidLayoutSubviews];
    self.tableView.frame = CGRectMake(0, 0, 100, 200); // This Works
}

- (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator
{
    [super viewWillTransitionToSize:size withTransitionCoordinator:coordinator];

    CGFloat viewWidth = self.view.frame.size.width;
    CGFloat viewHeight = self.view.frame.size.height;


    if (size.width >= size.height)
    {
        self.containerView.frame = CGRectMake(0, 0, viewWidth, 272);
        self.tableView.frame = CGRectMake(self.containerView.frame.size.height, 0, viewWidth, viewHeight - self.containerView.frame.size.height);
        NSLog(@"Portrait Mode");  // Get the NSLog, but frames don't change
    }
    else
    {
        self.containerView.frame = CGRectMake(0, 0, viewWidth / 2, viewHeight);
        self.tableView.frame = CGRectMake(viewWidth / 2, 0, viewHeight / 2, viewHeight);
        NSLog(@"Landscape Mode");  // Get the NSLog, but frames don't change
    }
}

因此，当我更改viewDidLayoutSubviews中的帧时，它可以正常工作。但是，当我尝试在viewWillTransition...中更改它时，它并没有改变，但我得到了NSLogs。

Answer 1

Apple建议使用以下方法：

- (void)viewWillTransitionToSize:(CGSize)size
   withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator

示例：

- (void)viewWillTransitionToSize:(CGSize)size
   withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator
{
    [super viewWillTransitionToSize:size withTransitionCoordinator:coordinator];

    if (size.width >= size.height) {
        // Landscape frames
        self.subviewA.frame = CGRectMake(x, y, width, height);
        self.subviewB.frame = CGRectMake(x, y, width, height);
    } else {
        // Portrait frames
        self.subviewA.frame = CGRectMake(x, y, width, height);
        self.subviewB.frame = CGRectMake(x, y, width, height);
    }
}

确保在实施此解决方案时调用上面显示的超类方法。

Answer 2

您可以使用以下代码检查设备方向：

UIInterfaceOrientation orientation = [UIApplication sharedApplication].statusBarOrientation;

 if(orientation == 0) //Default orientation 
//UI is in Default (Portrait) -- this is really a just a failsafe. 

 else if(orientation == UIInterfaceOrientationPortrait)
//Do something if the orientation is in Portrait

 else if(orientation == UIInterfaceOrientationLandscapeLeft)
// Do something if Left

 else if(orientation == UIInterfaceOrientationLandscapeRight)
//Do something if right

您可以根据需要创建两个单独的视图，并根据设备方向显示它们。

iPhone方向更改时更改UIViews位置

2 个答案: