如何更改AVPlayer实时流媒体URL?

Hi developers and experts, I need your good suggestions and help. I am working an application which has four different radio channels(buttons). I am using AVPlayer for live streaming. I would like to create an AVPlayer object in ViewDidLoad and just change the streaming url by using the four different buttons without having to re-create the AVPlayer object again and again. I googled but not find any solution. So your good suggestions and help would be appreciated. ThanksHi developers and experts, I need your good sug