How to Resize View so That Its Subviews Get Resized Too

Question

My window adds a subview (my root ViewController's view).

Such subview is superview of several other subviews.

I have just finished an app, and now I want to add an ad.

Here's some code:

[window addSubview:viewController.view];
viewController.view.frame=CGRectMake(0,0,320,480-48);
viewController.clipToBounds=YES;
Ad *ad=[Ad alloc] initWithFrame:CGRectMake(0,480-48,320,48)];

上面的viewController有几个子视图,但它们不会调整大小.上面的viewController.view最初是320,480,完全填充了子视图,直到底部的最后一个像素.在我将其高度从480更改为460后,子视图不会调整大小,因此在视图的底部(广告所在的位置),某些子视图不可见.

我如何调整子视图以适应父视图(viewController.view),当后者的高度减少20px时？(我知道他们会变形一点)

Answer 1

您需要为子视图设置自动调整大小:

ad.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;

有关更多详细信息,请参阅UIView文档.