如何在Swift中流式传输MP3网址(iOS)？

概述目前下面的代码可以流式传输本地mp3文件,所以如果我打电话 audio.scheduleFile(NSBundle.mainBundle().URLForResource(“Moon River”,withExtension：“mp3”)！) 它将正确播放本地文件.现在我希望能够流式传输非本地网址. 我需要做什么才能让我流式传输MP3网址？ class Audio: NSObject { 目前下面的代码可以流式传输本地mp3文件,所以如果我打电话

audio.schedulefile(NSBundle.mainBundle().URLForResource(“Moon River”,withExtension：“mp3”)！)
它将正确播放本地文件.现在我希望能够流式传输非本地网址.

我需要做什么才能让我流式传输MP3网址？

class Audio: NSObject {    var graph: AUGraph    var filePlayerAU: AudioUnit    var filePlayerNode: AUNode    var outputAU: AudioUnit    var fileID: AudiofileID    var currentFrame: Int64    overrIDe init () {        graph = AUGraph()        filePlayerAU = AudioUnit()        filePlayerNode = AUNode()        outputAU = AudioUnit()        fileID = AudiofileID()        currentFrame = 0        super.init()        NewAUGraph(&graph)        // Add file player node        var cd = AudioComponentDescription(componentType: OSType(kAudioUnitType_Generator),componentSubType: OSType(kAudioUnitSubType_AudiofilePlayer),componentManufacturer: OSType(kAudioUnitManufacturer_Apple),componentFlags: 0,componentFlagsMask: 0)        AUGraphAddNode(graph,&cd,&filePlayerNode)        // Add output node        var outputNode = AUNode()        cd.componentType = OSType(kAudioUnitType_Output)        cd.componentSubType = OSType(kAudioUnitSubType_RemoteIO)        AUGraphAddNode(graph,&outputNode)        // Graph must be opened before we can get node info!        AUGraphOpen(graph)        AUGraphNodeInfo(graph,filePlayerNode,nil,&filePlayerAU)        AUGraphNodeInfo(graph,outputNode,&outputAU)        AUGraphConnectNodeinput(graph,0)        AUGraphInitialize(graph)        registerCallbackForAU(filePlayerAU,nil)    }    func schedulefile(url: NSURL) {        AudiofileOpenURL(url,1,&fileID)        // Step 1: schedule the file(s)        // kAudioUnitProperty_ScheduledfileIDs takes an array of AudiofileIDs        var filesToSchedule = [fileID]        AudioUnitSetProperty(filePlayerAU,AudioUnitPropertyID(kAudioUnitProperty_ScheduledfileIDs),AudioUnitScope(kAudioUnitScope_Global),filesToSchedule,UInt32(sizeof(AudiofileID)))    }    func scheduleRegion() {        // Step 2: Schedule the regions of the file(s) to play        // Swift forces us to fill out the structs completely,even if they are not used        let smpteTime = SMPTETime(mSubframes: 0,mSubframedivisor: 0,mCounter: 0,mType: 0,mFlags: 0,mHours: 0,mMinutes: 0,mSeconds: 0,mFrames: 0)        var timeStamp = AudioTimeStamp(mSampleTime: 0,mHostTime: 0,mRateScalar: 0,mWordClockTime: 0,mSMPTETime: smpteTime,mFlags: UInt32(kAudioTimeStampSampleTimeValID),mReserved: 0)        var region = ScheduledAudiofileRegion()        region.mTimeStamp = timeStamp        region.mCompletionProc = nil        region.mCompletionProcUserData = nil        region.mAudiofile = fileID        region.mLoopCount = 0        region.mStartFrame = currentFrame        region.mFramestoplay = UInt32.max        AudioUnitSetProperty(filePlayerAU,AudioUnitPropertyID(kAudioUnitProperty_ScheduledfileRegion),&region,UInt32(sizeof(ScheduledAudiofileRegion)))        // Step 3: Prime the file player        var primeFrames: UInt32 = 0        AudioUnitSetProperty(filePlayerAU,AudioUnitPropertyID(kAudioUnitProperty_ScheduledfilePrime),&primeFrames,UInt32(sizeof(UInt32)))        // Step 4: Schedule the start time (-1 = Now)        timeStamp.mSampleTime = -1        AudioUnitSetProperty(filePlayerAU,AudioUnitPropertyID(kAudioUnitProperty_ScheduleStartTimeStamp),&timeStamp,UInt32(sizeof(AudioTimeStamp)))    }}

解决方法 如果您要从服务器播放远程文件(mp3).我会研究使用AVPlayer().

https://developer.apple.com/documentation/avfoundation/avplayer

这是一个片段,可能会推动你朝着正确的方向前进.当然,这只是一个非常基本的例子.

func playRemotefile() {    let fileUrl = "http://www.foo.com/bar.mp3"    let url = NSURL(string: fileUrl)    var myPlayer = AVPlayer(URL: url)    myPlayer.play()}

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