Swift 动画片段

   
        UIView.transitionWithView( self.WeatherDetailsView, duration: 0.7, options: .TransitionCrossDissolve, animations: {
            self.WeatherDetailsView.alpha = 0.75;
            self.WeatherView.alpha = 0;
            }, completion: nil)
【推广】 免费学中医，健康全家人
原文地址：https://www.cnblogs.com/yesicoo/p/Swift-dong-hua-pian-duan.html