ios - Xcode 6.0.1新警告

在更新到最新版本的Xcode之前，我没有收到此错误警告吗？

Incompatible pointer types initializing 'MPNowPlayingInfoCenter' with an expression of type 'NSNotificationCenter’

码:

- (void)doUpdateNowPlayingCenter
{
    if (!self.updateNowPlayingCenter || !self.nowPlayingItem)
    {
        return;
    }

    Class playingInfoCenter = NSClassFromString(@"MPNowPlayingInfoCenter");

    if (!playingInfoCenter)
    {
        return;
    }

    MPNowPlayingInfoCenter *center = [playingInfoCenter defaultCenter];
    NSDictionary *songInfo = @
    {
         MPMediaItemPropertyTitle: [self.nowPlayingItem valueForProperty:MPMediaItemPropertyTitle],
         MPMediaItemPropertyPlaybackDuration: [self.nowPlayingItem valueForProperty:MPMediaItemPropertyPlaybackDuration]
    };

    center.nowPlayingInfo = songInfo;
}

最佳答案

您可以通过以下方式强制默认中心来使警告静音:

MPNowPlayingInfoCenter *center = (MPNowPlayingInfoCenter*)[playingInfoCenter defaultCenter];

关于ios - Xcode 6.0.1新警告，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/26220537/