iphone - 如何将 UIButton 添加到 UIButton

Question

如何在 UIButton 之上添加 UIButton？

这样一来，如果我移动父 UIButton，顶部的 UIButton 也会移动。

Answer 1

UIButton *testButton = [UIButton buttonWithType:UIButtonTypeCustom];
testButton.backgroundColor = [UIColor redColor];

UIButton *smallerButton = [UIButton buttonWithType:UIButtonTypeCustom];
smallerButton.backgroundColor = [UIColor greenColor];
[testButton addSubview:smallerButton];

[self.view addSubview:testButton];