How does the iphone notification bar icon disappear on the screen?

1. Unlock iPhone to the home page of the screen.

2. Press and hold the top of the iPhone screen and pull it down.

3. In the notification bar page, select the icon information of the notification bar to be touched, and then select the Clear button on the right side of the message.

4. After pressing the Clear key, the icon under the notification bar of iPhone will be cleared and disappear on the screen.