AVPlayer和networkActivityIndi​​catorVisible

Question

从iOS 7开始,当流式传输和播放远程音频时,系统会自动显示networkActivityIndi​​cator(不是在模拟器中,而是在设备上).

NSString *URLString = @"http://streams.ffh.de/radioffh/mp3/hqlivestream.m3u";
AVPlayer *radioPlayer = [AVPlayer playerWithURL:[NSURL URLWithString:URLString]];
[radioPlayer play];

有没有办法阻止显示networkActivityIndi​​cator？