swift中，除了条形进度条，还有环形进度条，俗称“菊花”,效果如下图

1，创建

var activityIndicator:UIActivityIndicatorView!

func creatActivity(){        activityIndicator = UIActivityIndicatorView(activityIndicatorStyle:UIActivityIndicatorViewStyle.gray)        activityIndicator.center = self.view.center        self.view.addSubview(activityIndicator)        //开发触发        play()    }

func play(){        //进度条开始转动        activityIndicator.startAnimating()    }        func stop() {        //进度条停止转动        activityIndicator.stopAnimating()    }

2，判断点击屏幕一下，停止菊花，具体代码如下：

override func touchesBegan(_ touches: Set
     
      , with event: UIEvent?) {                for touch:AnyObject in touches {            let t:UITouch = touch as! UITouch            //当在屏幕上拍动一下时，终止环形进度条            if t.tapCount == 1{                self.stop()            }        }
     

 

结束！

1创建