Ios UIImageView图像随歌曲的不同而变化
我有一个简单的媒体播放器,我试图让它随着歌曲的变化而改变图片。使用我现在的代码,当你点击play时,它将显示艺术品,但当我点击next按钮跳到下一个项目时,它将保持不变,除非你点击另一个按钮 如何使UIImageView图像随着歌曲媒体项的更改而更改Ios UIImageView图像随歌曲的不同而变化,ios,swift,media-player,Ios,Swift,Media Player,我有一个简单的媒体播放器,我试图让它随着歌曲的变化而改变图片。使用我现在的代码,当你点击play时,它将显示艺术品,但当我点击next按钮跳到下一个项目时,它将保持不变,除非你点击另一个按钮 如何使UIImageView图像随着歌曲媒体项的更改而更改 import UIKit import MediaPlayer class ViewController: UIViewController { @IBOutlet weak var coverImageView: UIImageView
import UIKit
import MediaPlayer
class ViewController: UIViewController {
@IBOutlet weak var coverImageView: UIImageView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
createQueue()
}
func showArt(){
coverImageView.image =
myMediaPlayer.nowPlayingItem?.artwork!.image(at: CGSize.init(width: 500, height: 500))
coverImageView.isUserInteractionEnabled = true
}
@IBAction func playButton(_ sender: UIButton) {
togglePlay(on: sender)
showArt()
}
@IBAction func backButton(_ sender: UIButton) {
back()
}
@IBAction func nextButton(_ sender: UIButton) {
skip()
}
}
我的其他职能如下:
import MediaPlayer
let myMediaPlayer = MPMusicPlayerApplicationController.systemMusicPlayer
let playDrake = MPMediaPropertyPredicate(value: "Drake", forProperty: MPMediaItemPropertyArtist, comparisonType: MPMediaPredicateComparison.equalTo)
let myFilterSet: Set<MPMediaPropertyPredicate> = [playDrake]
func createQueue() {
let drakeQuery = MPMediaQuery(filterPredicates: myFilterSet)
myMediaPlayer.setQueue(with: drakeQuery)
}
func skip() {
myMediaPlayer.skipToNextItem()
}
func back() {
if myMediaPlayer.currentPlaybackTime > 0.05 {
myMediaPlayer.skipToPreviousItem()
} else if myMediaPlayer.currentPlaybackTime < 0.05 {
myMediaPlayer.skipToBeginning()
} else {
//do nothing
}
}
func togglePlay(on: UIButton) {
if myMediaPlayer.playbackState.rawValue == 2 || myMediaPlayer.playbackState.rawValue == 0 {
on.setTitle("Pause", for: UIControlState.normal)
myMediaPlayer.play()
} else if myMediaPlayer.playbackState.rawValue == 1{
on.setTitle("Play", for: UIControlState.normal)
myMediaPlayer.pause()
} else {
// do nothing
}
}
导入MediaPlayer
让myMediaPlayer=MPMusicLayerApplicationController.SystemMusicLayer
让playDrake=MPMediaPropertyPredicate(值:“Drake”,forProperty:MPMediaItemPropertyAttribute,comparisonType:MPMediaPredicateComparison.equalTo)
让myFilterSet:Set=[playDrake]
func createQueue(){
让drakeQuery=MPMediaQuery(filterPredicates:myFilterSet)
myMediaPlayer.setQueue(带:drakeQuery)
}
func skip(){
myMediaPlayer.skipToNextItem()
}
func back(){
如果myMediaPlayer.currentPlaybackTime>0.05{
myMediaPlayer.skipToPreviousItem()的名称
}否则,如果myMediaPlayer.currentPlaybackTime<0.05{
myMediaPlayer.skiptobeging()
}否则{
//无所事事
}
}
func togglePlay(打开:UIButton){
如果myMediaPlayer.playbackState.rawValue==2 | | myMediaPlayer.playbackState.rawValue==0{
on.setTitle(“暂停”,用于:uicontrol状态.normal)
myMediaPlayer.play()
}如果myMediaPlayer.playbackState.rawValue==1,则为else{
on.setTitle(“播放”,用于:uicontrol状态.normal)
myMediaPlayer.pause()
}否则{
//无所事事
}
}
尝试异步加载映像
DispatchQueue.global(qos: .background).async {
myMediaPlayer.nowPlayingItem?.artwork!.image(at: CGSize.init(width: 500, height: 500))
}
您是否尝试过将
showArt()
添加到下一步和后退操作中?您的skip
函数定义在哪里?您应该像@kbunarjo questions一样显示skip和后退()。@MwcsMac我刚刚添加了其他函数。任何帮助都将不胜感激@我刚刚添加了其他函数。任何帮助都将不胜感激!我在原来的帖子中添加了我的支持功能。我会将该代码添加到视图控制器还是其他地方?