複数回addSubviewを呼んだ時の挙動について - Qiita

//view1, view1Aにview2を追加したい場合 var view1 = UIView(frame:CGRectMake(0, 0, 200, 200)) view1.backgroundColor = UIColor.blueColor() var view1A = UIView(frame:CGRectMake(0, 300, 200, 200)) view1A.backgroundColor = UIColor.redColor() var view2 = UIView(frame:CGRectMake(50, 50, 100, 100)) view2.backgroundColor = UIColor.greenColor() view1.addSubview(view2) view1A.addSubview(view2) let averageHeight = CGRe