iOS實現AVPlayer邊加載邊播

當使用 AVPlayer播放流媒體時，需要將automaticallyWaitsToMinimizeStalling屬性設爲NO

    NSURL * url = [NSURL URLWithString:path];
    self.player = [AVPlayer playerWithURL:url];
    self.player.automaticallyWaitsToMinimizeStalling = NO;