我正在尝试正确设置已播放的播放时间.当调用player.seek功能或暂停曲目时,不会更新nowplayinginfocenter经过的时间.我现在使用setNowPlaying()初始化inffinenter,然后在寻求在信息中心更新它时调用setNowPlayingCurrentTime.
但是,当调用此时,经过的时间将重置为0.
任何建议都非常有用.
private func setNowPlaying(track: Track) {
//set now playing info center
if NSClassFromString("MPNowPlayingInfoCenter") != nil {
//artwork
var url = NSURL(string: track.artworkUrl!)
var data = NSData(contentsOfURL: url!)
var image = UIImage(data: data!)
var albumArt = MPMediaItemArtwork(image: image)
var songInfo: NSMutableDictionary = [
MPMediaItemPropertyTitle: track.title!,MPMediaItemPropertyArtwork: albumArt,MPMediaItemPropertyArtist: track.userName!,MPMediaItemPropertyPlaybackDuration: track.duration!,MPNowPlayingInfoPropertyPlaybackRate: 0
]
MPNowPlayingInfoCenter.defaultCenter().nowPlayingInfo = songInfo as NSObject as! [NSObject : AnyObject]
}
if (AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback,error: nil)) {
println("Receiving remote control events")
UIApplication.sharedApplication().beginReceivingRemoteControlEvents()
} else {
println("Audio Session error.")
}
}
private func setNowPlayingCurrentTime(track: Track,time: Float64) {
var songInfo: NSDictionary = MPNowPlayingInfoCenter.defaultCenter().nowPlayingInfo
songInfo.mutableCopy().setValue(Double(time),forKey: MPNowPlayingInfoPropertyElapsedPlaybackTime)
println("test")
println(songInfo.mutableCopy().valueForKey(MPNowPlayingInfoPropertyElapsedPlaybackTime))
MPNowPlayingInfoCenter.defaultCenter().nowPlayingInfo = songInfo.mutableCopy() as! NSObject as! [NSObject : AnyObject]
}
解决方法
我是通过以下方式完成的(Swift 2) – 关键是在播放/暂停时正确设置属性.
func play() {
if self.player.currentItem != nil {
player.play()
//mpnowplaying info center
MPNowPlayingInfoCenter.defaultCenter().nowPlayingInfo![MPNowPlayingInfoPropertyElapsedPlaybackTime] = CMTimeGetSeconds(player.currentTime())
MPNowPlayingInfoCenter.defaultCenter().nowPlayingInfo![MPNowPlayingInfoPropertyPlaybackRate] = 1
} else {
loadTrackToPlayer()
player.play()
//mpnowplaying info center
MPNowPlayingInfoCenter.defaultCenter().nowPlayingInfo![MPNowPlayingInfoPropertyElapsedPlaybackTime] = CMTimeGetSeconds(player.currentTime())
MPNowPlayingInfoCenter.defaultCenter().nowPlayingInfo![MPNowPlayingInfoPropertyPlaybackRate] = 1
}
}
func pause() {
if self.player.currentItem != nil {
player.pause()
MPNowPlayingInfoCenter.defaultCenter().nowPlayingInfo![MPNowPlayingInfoPropertyPlaybackRate] = 0
MPNowPlayingInfoCenter.defaultCenter().nowPlayingInfo![MPNowPlayingInfoPropertyElapsedPlaybackTime] = CMTimeGetSeconds(player.currentTime())
}
}
