Question

我需要将一个scrollView（里面有一个文本滚动）放到我的iPad App中。

我使用此代码：

- (void)showRootPopoverButtonItem:(UIBarButtonItem*)barButtonItem 
{
    movie_scroll.frame = CGRectMake(50, 430, 700, 600);
    movie_scroll.directionalLockEnabled = YES;
    movie_detail.frame = CGRectMake(0, 0, 600, 400);

    NSLog(@"You are in portrait from showRootPopoverButtonItem"); 
}

- (void)invalidateRootPopoverButtonItem:(UIBarButtonItem*)barButtonItem 
{
    movie_scroll.frame = CGRectMake(50, 540, 700, 400);
    movie_scroll.directionalLockEnabled = YES;
    movie_detail.frame = CGRectMake(0, 0, 600, 300);

    NSLog(@"You are in landscape from invalidateRootPopoverButtonItem"); 
}

这也是- (void)viewDidLoad

//change position for scrollView
if (UIDeviceOrientationIsLandscape(self.interfaceOrientation))
{
    movie_scroll.frame = CGRectMake(50, 540, 700, 400);
    movie_scroll.directionalLockEnabled = YES;
    movie_detail.frame = CGRectMake(0, 0, 600, 300);

    NSLog(@"You are in  landscape from viewDidLoad");   
}
else 
{
    movie_scroll.frame = CGRectMake(50, 430, 700, 600);
    movie_scroll.directionalLockEnabled = YES;
    movie_detail.frame = CGRectMake(0, 0, 600, 400);

    NSLog(@"You are in portrait da viewDidLoad");   
}

当我第一次以肖像方式运行应用程序时，我没有处于该位置的scrollView。如果我尝试旋转设备，则滚动视图开始位置...

为什么？

Answer 1

你应该把viewDidLoad代码放到viewWillAppear：中，因为在viewWillAppear：之前，viewDidLoad中可能没有设置所有内容的边界。我不明白你的上一个问题：“如果我尝试旋转设备，则滚动视图的起始位置......”

为什么我的scrollView不会以我的坐标开始？

1 个答案: