仿网易新闻/View从中间缩放透明/消失效果

2019独角兽企业重金招聘Python工程师标准>>>

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    // MARK: 关闭   view
    @objc  private func close() {

        UIView .animateWithDuration(0.4, animations: {
            
            self.startShareView.width = 0;
            
            self.startShareView.height = 0;
            
            // 不设置的话 会从 左上角消失
            self.startShareView.center = self.view.center;
            
            self.startShareView.alpha = 0;
        
            
        }) { (_) in
            
            self.startShareView.removeFromSuperview();
  
        }
        
    }

转载于:https://my.oschina.net/codeismygirl/blog/666548