本文主要是介绍swift 音乐播放器项目-《lxy的杰伦情歌》开发实战演练,希望对大家解决编程问题提供一定的参考价值,需要的开发者们随着小编来一起学习吧!
最近准备将项目转化为OC与swift混合开发,试着写一个swift音乐播放器的demo,体会到了swift相对OC的优势所在,废话不多说,先上效果图:
ps:身为杰伦的铁粉,demo的主题必须跟杰伦有关,哈哈!而且自我感觉我有转型UI的天赋,有木有?
一、导入OC文件
创建好swift项目之后,导入OC工具类文件,Xcode会自动生成桥接文件
打开这个文件,在开头导入OC工具类的头文件,就可以调用OC工具类了
//
// Use this file to import your target's public headers that you would like to expose to Swift.
//
#import "UIView+Frame.h"
二、界面绘制
这里方便起见,没有考虑性能问题,只是简单的demo,所以直接创建十个音乐按钮,加上一个播放按钮和一个暂停按钮。十个乐曲按钮放在一个UIScrollView上面。而且播放的音乐是本地音乐,首先在viewDidLoad前创建全局变量,代码如下:
var btnIndex = 0let arrMusicName = ["蒲公英的约定","窃爱","退后","告白气球","阳光宅男","甜甜的","彩虹","心雨","哪里都是你","说好的幸福呢"]let btnPlay:UIButton = UIButton(type:.System)let btnPause:UIButton = UIButton(type:.System)override func viewDidLoad() {
界面绘制代码如下:
let SCREEN_W = UIScreen.mainScreen().bounds.size.widthlet SCREEN_H = UIScreen.mainScreen().bounds.size.heightlet ivBack:UIImageView = UIImageView(frame:CGRect(x:0, y:20, width:SCREEN_W, height:SCREEN_H))ivBack.image = UIImage(named:"aa.jpg")self.view.addSubview(ivBack)let lbTitle:UILabel = UILabel(frame:CGRect(x:0, y:20, width:SCREEN_W, height:44))lbTitle.text = "LXY的杰伦情歌"lbTitle.textColor = UIColor.whiteColor()lbTitle.textAlignment = NSTextAlignment.CenterlbTitle.backgroundColor = UIColor.blackColor()lbTitle.alpha = 0.2self.view.addSubview(lbTitle)let scv:UIScrollView = UIScrollView(frame:CGRect(x:0, y:64, width:SCREEN_W, height:SCREEN_H - 74 - 44))scv.backgroundColor = UIColor.clearColor()self.view.addSubview(scv)var boom:Int = 0for st in arrMusicName {print(st)if let index = arrMusicName.indexOf(st) {let btn:UIButton = UIButton(type:.System)btn.backgroundColor = UIColor.whiteColor()btn.alpha = 0.5btn.setTitle(st, forState: UIControlState.Normal)btn.setTitleColor(UIColor.blackColor(), forState: UIControlState.Normal)btn.titleLabel?.font = UIFont.systemFontOfSize(16)btn.layer.masksToBounds = truebtn.layer.shadowOffset = CGSizeMake(0, 10)btn.layer.shadowColor = UIColor.grayColor().CGColorbtn.layer.shadowOpacity = 1btn.layer.shadowRadius = 10btn.layer.cornerRadius = 6btn.tag = index//传递触摸对象(即点击的按钮),需要在定义action参数时,方法名称后面带上冒号btn.addTarget(self, action:#selector(play(_:)), forControlEvents:.TouchUpInside)if index%2 == 0 {btn.frame = CGRectMake(SCREEN_W/9, 20 + (SCREEN_W/3 + SCREEN_W/9)*CGFloat(index/2),SCREEN_W/3,SCREEN_W/3)}else {btn.frame = CGRectMake(5*SCREEN_W/9, 20 + (SCREEN_W/3 + SCREEN_W/9)*CGFloat(index/2),SCREEN_W/3,SCREEN_W/3)}scv.addSubview(btn)boom = Int(btn.bottom)}}scv.contentSize = CGSizeMake(SCREEN_W,CGFloat(boom + 20))btnPlay.frame = CGRectMake(0, scv.bottom, SCREEN_W/2 - 10, 44)btnPlay.backgroundColor = UIColor.whiteColor()btnPlay.alpha = 0.5btnPlay.setTitle("播放", forState: UIControlState.Normal)btnPlay.setTitleColor(UIColor.blueColor(), forState: UIControlState.Normal)btnPlay.titleLabel?.font = UIFont.systemFontOfSize(16)btnPlay.addTarget(self, action:#selector(MPMediaPlayback.play), forControlEvents:.TouchUpInside)btnPlay.hidden = trueself.view.addSubview(btnPlay)btnPause.frame = CGRectMake(10 + SCREEN_W/2, scv.bottom, SCREEN_W/2 - 10, 44)btnPause.backgroundColor = UIColor.whiteColor()btnPause.alpha = 0.5btnPause.setTitle("暂停", forState: UIControlState.Normal)btnPause.setTitleColor(UIColor.blueColor(), forState: UIControlState.Normal)btnPause.titleLabel?.font = UIFont.systemFontOfSize(16)btnPause.addTarget(self, action:#selector(MPMediaPlayback.pause), forControlEvents:.TouchUpInside)btnPause.hidden = trueself.view.addSubview(btnPause)}func play(btn: UIButton){btnIndex = btn.taglet music = arrMusicName[btn.tag]let path = NSBundle.mainBundle().pathForResource(music, ofType: "mp3")let pathURL=NSURL(fileURLWithPath: path!)do {audioPlayer = try AVAudioPlayer(contentsOfURL: pathURL)} catch {audioPlayer = nil}audioPlayer?.prepareToPlay()audioPlayer.play()btnPause.hidden = falsebtnPlay.hidden = false
三、音乐播放器创建
class AudioManager: NSObject, AVAudioPlayerDelegate {static let sharedManager = AudioManager() // singletonvar audioPlayer: AVAudioPlayer!
}
然后在曲剧变量里实例化播放器
var audioPlayer = AudioManager.sharedManager.audioPlayer
四、按钮事件绑定
1、音乐按钮播放音乐事件
func playWitnIndex(index: Int){let music = arrMusicName[index]let path = NSBundle.mainBundle().pathForResource(music, ofType: "mp3")let pathURL=NSURL(fileURLWithPath: path!)do {audioPlayer = try AVAudioPlayer(contentsOfURL: pathURL)} catch {audioPlayer = nil}audioPlayer?.prepareToPlay()audioPlayer.play()btnPause.hidden = falsebtnPlay.hidden = false}
这个方法吧button带过来,通过button的tag值判断所点击的按钮
2、播放按钮的点击事件
func play(){audioPlayer.play()}
3、暂停按钮的点击事件
func pause(){audioPlayer.pause()}
到这里,音乐播放器的基本功能就已经实现了,点击就会有音乐播放了,并且播放暂停功能都已经实现
五、音乐后台播放的实现
要实现后台音乐播放功能,还学要对音乐播放器设置一下
在viewDidLoad方法中添加一下代码:
UIApplication.sharedApplication().beginReceivingRemoteControlEvents()do {try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayAndRecord)try AVAudioSession.sharedInstance().setActive(true)} catch {}
只添加这个还不够,需要对工程进行设置
在info.plist添加Required background modes,具体如图:
这样,音乐播放器就实现了后台播放功能
六、音乐播放器锁屏音乐播放设置
添加setLockView方法,代码如下:
func setLockView(){MPNowPlayingInfoCenter.defaultCenter().nowPlayingInfo = [// 歌曲名称MPMediaItemPropertyTitle:arrMusicName[btnIndex],// 演唱者MPMediaItemPropertyArtist:"周杰伦",// 锁屏图片MPMediaItemPropertyArtwork:MPMediaItemArtwork(image: UIImage(named: "aa.jpg")!),//MPNowPlayingInfoPropertyPlaybackRate:1.0,// 总时长 MPMediaItemPropertyPlaybackDuration:audioPlayer.duration,// 当前时间 MPNowPlayingInfoPropertyElapsedPlaybackTime:audioPlayer.currentTime]}
在viewDidLoad方法中调用这个方法:
self.setLockView()
这样就实现了锁屏界面了按钮设置
锁屏按钮点击事件实现需要重写remoteControlReceivedWithEvent方法,代码如下:
override func remoteControlReceivedWithEvent(event: UIEvent?) {switch event!.subtype {case .RemoteControlPlay: // play按钮audioPlayer.play()case .RemoteControlPause: // pause按钮audioPlayer.pause()case .RemoteControlNextTrack: // next// ▶▶self.btnIndex = self.btnIndex + 1self.playWitnIndex(self.btnIndex)self.setLockView()breakcase .RemoteControlPreviousTrack: // previous// ◀◀if self.btnIndex>0 {self.btnIndex = self.btnIndex - 1self.playWitnIndex(self.btnIndex)self.setLockView()}breakdefault:break}}
七、外放问题的解决
此时,虽然功能都实现了,但是会发现音乐播放声音特别小,因为AVAudioPlayer默认是听筒播放,而不是扬声器播放
这里需要在播放器设置里添加如下设置代码
let session = AVAudioSession.sharedInstance()try session.setCategory(AVAudioSessionCategoryPlayAndRecord, withOptions: AVAudioSessionCategoryOptions.DefaultToSpeaker)
其他设置如图所示:
到这里,这个swift版的lxy杰伦情歌APP就大功告成了,文章最后附上项目源码(由于音乐文件太大,只保留前两首歌曲),希望大家喜欢:
项目源码下载地址
这篇关于swift 音乐播放器项目-《lxy的杰伦情歌》开发实战演练的文章就介绍到这儿,希望我们推荐的文章对编程师们有所帮助!