如何將UIButton添加到UIButton

Question

如何在UIButton上添加UIButton？

這樣，如果我移動父UIButton，那么頂部的那個也會移動。

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];

Answer 2

[oneButton addSubview:otherButton];

請記住， UIButton是UIView的子類......

Answer 3

UIButton *parentBtn;
UIButton *childBtn;

parentBtn = [UIButton buttonWithType: // init the button];
childBtn = //same for child btn

[self.view addSubview:parentBtn]; //add the parent button to the view
[parentBtn addSubview:childBtn]; //add the child button on top of the parent button