//1.2加入商家标题评分容器 let titleWarp=UIView(frame: CGRectMake(0, 150, screenObject.width, 50)); titleWarp.backgroundColor=UIColor.blackColor().colorWithAlphaComponent(0.5); //记住不要加下面这句代码 //titleWarp.alpha=0.2;
原文：http://www.cnblogs.com/brance/p/5000762.html