Question

我有一个包含两个子视图的UIScrollView，每个子视图都与设备屏幕的大小完全相同。我在AppDelegate：

中设置子视图的大小

CGRect screenRect = [[self window] bounds];
[[myViewController1 view] setFrame:screenRect];
screenRect.origin.x = screenRect.size.width;
[[myViewController2 view] setFrame:screenRect];

然后我将这些视图添加到UIScrollView并将UIScrollView的contentSize设置为屏幕宽度的两倍：

CGRect containerRect = CGRectMake(0, 0, screenRect.size.width * 2, screenRect.size.height);
UIScrollView *sv = (UIScrollView *)[myRootViewController view];
[sv addSubview:[myViewController1 view]];
[sv addSubview:[myViewController2 view]];
[sv setFrame:[[self window] bounds]];
[sv setContentSize:containerRect.size];

当应用程序运行时，我会按预期看到并排的视图。但是，两个视图都比屏幕宽度宽得多。此外，UIScrollView不限制垂直滚动，我期望它的高度等于屏幕高度。

如何让UIScrollView限制垂直滚动并强制其子项在适当大小的帧中渲染？

Answer 1

您是否已记录[[自我窗口]界限？它可能包含状态栏，这将使您的内容视图20pts太高（从而启用垂直滚动）。也许：

CGRect screenFrame = [[UIScreen mainScreen] applicationFrame];
myViewController1.view.frame = CGRectMake(0.0, 0.0, CGRectGetWidth(screenFrame), CGRectGetHeight(screenFrame));
myViewController2.view.frame = CGRectOffset(myViewController1.view.frame, CGRectGetWidth(screenFrame), 0.0);

然后：

CGRect contentRect = CGRectMake(0, 0, CGRectGetWidth(screenFrame), CGRectGetHeight(screenFrame));
UIScrollView *sv = (UIScrollView *)myRootViewController.view;
[sv addSubview:myViewController1.view];
[sv addSubview:myViewController2.view];
[sv setContentSize:contentRect.size];

在UIScrollView上设置边界

1 个答案: