UIView hierarchy

Question

I am just curious if I have a webview, and I want to have another custom uiview set on top of it.

So basically I have a window, and I have two views:

|--View1--| |--webView|

how can I set these views based on the window on hierarchy manner? So one view and lay on top of another view?

Thanks

Answer 1

You can just add the uiview on top of the webview. Just set the frame for the otherview, and then add it.

otherView.frame = CGRectMake(0, 430, webView.frame.size.width, 50);
[webview addSubview:otherview];

Answer 2

从UIView类的subviews文档中：“数组中的子视图的顺序反映了它们在屏幕上的可见顺序，索引为0的视图是最后一个视图。”

Answer 3

You can change the order of currently added UIViews, there are some methods that you can use to control the hierarchy programatically, like that:

• addSubview:
• bringSubviewToFront:
• sendSubviewToBack:
• removeFromSuperview
• insertSubview:atIndex:
• insertSubview:aboveSubview:
• insertSubview:belowSubview:
• exchangeSubviewAtIndex:withSubviewAtIndex:
• isDescendantOfView:

Put special attention on the methods in bold, seems that is exactly what are you looking for. Also look around apple UIView documentation here .

See ya!.