如果用户单击播放/暂停，则为tvOS

分类：编程问答

如何解决如果用户单击播放/暂停，则为tvOS

只是想弄清楚如何在SwiftUI中知道用户是否单击了播放/暂停按钮？

如果用户单击“暂停/播放”按钮，我需要我的媒体播放器暂停或播放。

我看过类似的例子

override func pressesBegan(presses: Set<UIPress>,withEvent event: UIPressesEvent?) {
  if(presses.first?.type == UIPressType.PlayPause) {
    pushedPlay()
    // don't call to super class 
    } 
}

但是那行不通-实际上，该应用程序无法运行。

enter image description here

也看到了这个例子

override func pressesEnded(_ presses: Set<UIPress>,with event: UIPressesEvent?)
{
    for press in presses
    {
        if press.type == UIPress.PressType.playPause
        {
            // handle play pause action
            break
        }
        else
        {
            super.pressesEnded(presses,with: event)
        }
    }
}

但是我不能将其放在MusicPlayer.swift文件中，因为它不会覆盖任何内容。

我也不能放入

//
//  ContentView.swift
//  DRN1
//
//  Created by Russell Harrower on 10/10/20.
//

import SwiftUI
import AVKit


struct ContentView: View {
    var body: some View {
       
                            VStack{
                                
                                 
                                
                                Text("Testing Music Player").font(.headline).bold().multilineTextAlignment(.leading)
                                                               
                            
                                 Spacer()
                                                       
                           }
                         
                         
            
        .onAppear {
         //   self.navigationViewStyle(StackNavigationViewStyle())
            MusicPlayer.shared.startBackgroundMusic(url: "http://stream.radiomedia.com.au:8006/stream",type: "radio")
            
        }
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}

MusicPlayer.swift 

import SwiftUI
//import Foundation
import AVFoundation
import MediaPlayer
import AVKit

struct NowPlayingData: Codable,Identifiable {
    var id = UUID()
    var artist : String
    var song : String
    var cover : String
}

class MusicPlayer{
static let shared = MusicPlayer()
static var mediatype = ""
static var artist = ""
static var song = ""
static var cover = ""
static var uuid = UIDevice.current.identifierForVendor?.uuidString


var player: AVPlayer?
let playerViewController = AVPlayerViewController()

        
    func gettype(completion: @escaping (String) -> Void){
          
            completion(MusicPlayer.mediatype)
       
      }
    
    
        
      func getPodCastPlayerNP(completion: @escaping (NowPlayingData) -> ()) {
       // Timer.scheduledTimer(withTimeInterval: 15,repeats: true) { (timer) in
          let songdata = "{\"id\": \"1\",\"song\": \"\(MusicPlayer.song)\",\"artist\": \"\(MusicPlayer.artist)\",\"cover\": \"\(MusicPlayer.cover)\"}"
          let data: Foundation.Data = songdata.data(using: .utf8)!
          
          let podcast = try! JSONDecoder().decode(NowPlayingData.self,from: data)
                
                         //print(data!)
                        // let episode = podcast.programs
                        DispatchQueue.main.async{
                            // The array is stored under programs now
                          //print(podcast)
                          completion(podcast)
                        }
         // }
      }

    func startBackgroundMusic(url: String,type:String) {
     
        MusicPlayer.mediatype = String(type)
        
        //let urlString = "http://stream.radiomedia.com.au:8003/stream"
        let urlString = url+"?uuid="+MusicPlayer.uuid!
        print(urlString)
        guard let url = URL.init(string: urlString) else { return }

        let playerItem = AVPlayerItem.init(url: url)
        player = AVPlayer.init(playerItem: playerItem)
        
      
        do {

            try AVAudioSession.sharedInstance().setCategory(.playback,mode: .default,options: [.duckOthers,.mixWithOthers,.allowAirPlay])
            print("Playback OK")
           // let defaults = UserDefaults.standard
           // defaults.set("1",forKey: defaultsKeys.musicplayer_connected)
            try AVAudioSession.sharedInstance().setActive(true)
            print("Session is Active")
        } catch {
           // let defaults = UserDefaults.standard
          //  defaults.set("0",forKey: defaultsKeys.musicplayer_connected)
            print(error)
        }

         #if targetEnvironment(simulator)

        self.playerViewController.player = player
        self.playerViewController.player?.play()
        print("SIMULATOR")

         #else

        self.setupRemoteTransportControls()
        player?.play()

        #endif
        

    }
    
    
    func startBackgroundMusicTwo() {

        
        let urlString = "http://stream.radiomedia.com.au:8003/stream"
        //let urlString = url
        guard let url = URL.init(string: urlString) else { return }

        let playerItem = AVPlayerItem.init(url: url)
        player = AVPlayer.init(playerItem: playerItem)
        
      
        do {

            try AVAudioSession.sharedInstance().setCategory(.playback,forKey: defaultsKeys.musicplayer_connected)
            print(error)
        }

         #if targetEnvironment(simulator)

        self.playerViewController.player = player
        self.playerViewController.player?.play()
        print("SIMULATOR")

         #else

        self.setupRemoteTransportControls()
        player?.play()

        #endif

    }




func setupRemoteTransportControls() {
   // Get the shared MPRemoteCommandCenter
    let commandCenter = MPRemoteCommandCenter.shared()

    // Add handler for Play Command
    commandCenter.playCommand.addTarget { [unowned self] event in
        if self.player?.rate == 0.0 {
            self.player?.play()
            return .success
        }
        return .commandFailed
    }

    // Add handler for Pause Command
    commandCenter.pauseCommand.addTarget { [unowned self] event in
        if self.player?.rate == 1.0 {
            self.player?.pause()
            return .success
        }
        return .commandFailed
    }

   // self.nowplaying(artist: "Anna",song: "test")


}

func nowplaying(with artwork: MPMediaItemArtwork,artist: String,song: String){
  

MPNowPlayingInfoCenter.default().nowPlayingInfo = [
      MPMediaItemPropertyTitle:song,MPMediaItemPropertyArtist:artist,MPMediaItemPropertyArtwork: artwork,MPNowPlayingInfoPropertyIsLiveStream: true
]


   // self.getArtBoard();
}


func setupNowPlayingInfo(with artwork: MPMediaItemArtwork) {
      MPNowPlayingInfoCenter.default().nowPlayingInfo = [
        //   MPMediaItemPropertyTitle: "Some name",//   MPMediaItemPropertyArtist: "Some name",//MPMediaItemPropertyPlaybackDuration: CMTimeGetSeconds(currentItem.duration),//MPNowPlayingInfoPropertyPlaybackRate: 1,//MPNowPlayingInfoPropertyElapsedPlaybackTime: CMTimeGetSeconds(currentItem.currentTime())
       ]
   }



func getData(from url: URL,completion: @escaping (UIImage?) -> Void) {
    URLSession.shared.dataTask(with: url,completionHandler: {(data,response,error) in
        if let data = data {
            completion(UIImage(data:data))
        }
    })
        .resume()
}

func getArtBoard(artist: String,song: String,cover: String) {
   // MusicPlayer.JN = "[{'artist': \(artist),'song':\(song),'cover': \(cover)}]"
    MusicPlayer.artist = artist
    MusicPlayer.song = song
    MusicPlayer.cover = cover
    
    
    guard let url = URL(string: cover) else { return }
    getData(from: url) { [weak self] image in
        guard let self = self,let downloadedImage = image else {
                return
        }
        let artwork = MPMediaItemArtwork.init(boundsSize: downloadedImage.size,requestHandler: { _ -> UIImage in
            return downloadedImage
        })
        self.nowplaying(with: artwork,artist: artist,song: song)
    }
}



    func stopBackgroundMusic() {
        guard let player = player else { return }
        player.pause()

}
}

还尝试添加：

func onPlayPauseCommand(perform action: (() -> Void)?) -> ContentView{
    MusicPlayer.shared.player?.pause()
}

进入我的内容视图，但有错误

Cannot convert return expression of type 'Void?' to return type 'ContentView'

**更新**

所以我尝试使用以下内容：

struct ContentView: View {
    @State var showingDetail = false
    
    @State var showDetail = String(false)
    var body: some View {
       
                            VStack{
                                
                                 Text("Interactive Radio").font(.headline).bold().multilineTextAlignment(.leading)
                                 Text(showDetail)
                                                       
                                 Spacer()
                                                       
                           }
                         
                         
            
                            
        .onAppear {
         //   self.navigationViewStyle(StackNavigationViewStyle())
            MusicPlayer.shared.startBackgroundMusic(url: "http://url.com/stream",type: "radio")
            print(self.showingDetail)
               
        }
                            
        
        .onPlayPauseCommand(perform: {
            MusicPlayer.shared.player?.pause()
            
        })
    
    }
    

}

但是没有成功。我也尝试过长按，但也没有触发

.onLongPressGesture(minimumDuration: 0.5,perform: {
                                print("hello")
                            })

**已解决**

请注意以下原因使其起作用

//
//  ContentView.swift
//  DRN1
//
//  Created by Russell Harrower on 10/10/20.
//

import SwiftUI
import AVKit



struct ContentView: View {
    @State var showingDetail = false
    
    @State var showDetail = String(false)
    var body: some View {
       
                                    
                                    
        Button(action: {
            print("hello")
        },label: {
            Text("Button")
        })
                          
                         
                         
            
                            
        .onAppear {
         //   self.navigationViewStyle(StackNavigationViewStyle())
            MusicPlayer.shared.startBackgroundMusic(url: "http://URL:8006/stream",type: "radio")
            print(self.showingDetail)
               
        }
                            
                       
        .onPlayPauseCommand(perform: {
            
            if(MusicPlayer.shared.player?.rate != 0)
            {
                MusicPlayer.shared.player?.pause()
            }
            else{
                MusicPlayer.shared.player?.play()
            }
        })
    
    }
    

}


struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}

解决方法

在tvOS上有一个特殊的视图修饰符：onPlayPauseCommand（perform :)，只需将其添加到ContentView中，然后将其与播放/暂停代码一起传递给闭包即可。

struct ContentView: View {
    var body: some View {
        Text("Hello,world!")
        .focusable()
        .onPlayPauseCommand(perform: {
            print("hello")
        })
    }
}

请注意.focusable() －视图需要焦点才能播放/暂停，因此，如果视图没有按钮或其他可聚焦元素，则必须手动设置.focusable()。>

文档： https://developer.apple.com/documentation/swiftui/view/onplaypausecommand(perform:)

版权声明：本文内容由互联网用户自发贡献，该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容， 请发送邮件至 dio@foxmail.com 举报，一经查实，本站将立刻删除。

相关推荐

导入项目后报错问题
依赖报错 idea导入项目后依赖报错，解决方案：https://blog.csdn.net/weixin_42420249/article/details/81191861 依赖版本报错：更换其他版本 无法下载依赖可参考：https://blog.csdn.net/weixin_42628809/a
idea不能识别yaml文件
使用mybatis plus常见错误
错误1：代码生成器依赖和mybatis依赖冲突 启动项目时报错如下 2021-12-03 13:33:33.927 ERROR 7228 [ main] o.s.b.d.LoggingFailureAnalysisReporter : *************************** APPL
gradle常见问题与错误
错误1：gradle项目控制台输出为乱码 # 解决方案：https://blog.csdn.net/weixin_43501566/article/details/112482302 # 在gradle-wrapper.properties 添加以下内容 org.gradle.jvmargs=-Df
Mybatis Plus传入参数0不起作用
错误还原：在查询的过程中，传入的workType为0时，该条件不起作用 &lt;select id=&quot;xxx&quot;&gt; SELECT di.id, di.name, di.work_type, di.updated... &lt;where&gt; &lt;if test=&qu
linux中make编译源码包失败
报错如下，gcc版本太低 ^ server.c:5346:31: 错误：‘struct redisServer’没有名为‘server_cpulist’的成员 redisSetCpuAffinity(server.server_cpulist); ^ server.c: 在函数‘hasActiveC
微服务启动错误：Command line is too long. Shorten command line for
解决方案1 1、改项目中.idea/workspace.xml配置文件，增加dynamic.classpath参数 2、搜索PropertiesComponent，添加如下 &lt;property name=&quot;dynamic.classpath&quot; value=&quot;tru
vue常见错误
删除根组件app.vue中的默认代码后报错：Module Error (from ./node_modules/eslint-loader/index.js): 解决方案：关闭ESlint代码检测，在项目根目录创建vue.config.js，在文件中添加 module.exports = { lin
spark常见错误
查看spark默认的python版本 [root@master day27]# pyspark /home/software/spark-2.3.4-bin-hadoop2.7/conf/spark-env.sh: line 2: /usr/local/hadoop/bin/hadoop: No s
matplotlib报错：AttributeError: module 'backend_interagg' has no attribute 'FigureCanvas'. Did you mean: 'FigureCanvasAgg'?
使用本地python环境可以成功执行 import pandas as pd import matplotlib.pyplot as plt # 设置字体 plt.rcParams[&#39;font.sans-serif&#39;] = [&#39;SimHei&#39;] # 能正确显示负号 p
gitlab登录失败，报错：This challenge page was accidentally cached by an intermediary and is no longer available.
设置时间 控制面板
后端开发常见错误
错误1：Request method ‘DELETE‘ not supported 错误还原：controller层有一个接口，访问该接口时报错：Request method ‘DELETE‘ not supported 错误原因：没有接收到前端传入的参数，修改为如下 参考 错误2：cannot r
docker常见错误
错误1：启动docker镜像时报错：Error response from daemon: driver failed programming external connectivity on endpoint quirky_allen 解决方法：重启docker -&gt; systemctl r
idea常见错误
错误1：private field ‘xxx‘ is never assigned 按Altʾnter快捷键，选择第2项 参考：https://blog.csdn.net/shi_hong_fei_hei/article/details/88814070 错误2：启动时报错，不能找到主启动类 #
pip安装依赖失败
报错如下，通过源不能下载，最后警告pip需升级版本 Requirement already satisfied: pip in c:\users\ychen\appdata\local\programs\python\python310\lib\site-packages (22.0.4) Coll
maven常见错误
错误1：maven打包报错 错误还原：使用maven打包项目时报错如下 [ERROR] Failed to execute goal org.apache.maven.plugins:maven-resources-plugin:3.2.0:resources (default-resources)
cloud项目中常见错误
错误1：服务调用时报错 服务消费者模块assess通过openFeign调用服务提供者模块hires 如下为服务提供者模块hires的控制层接口 @RestController @RequestMapping(&quot;/hires&quot;) public class FeignControl
springboot常见错误
错误1：运行项目后报如下错误 解决方案 报错2：Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.1:compile (default-compile) on project sb 解决方案：在pom.
springmvc拦截器中使用redisTemplate报空指针异常
参考 错误原因 过滤器或拦截器在生效时，redisTemplate还没有注入 解决方案：在注入容器时就生效 @Component //项目运行时就注入Spring容器 public class RedisBean { @Resource private RedisTemplate&lt;String
vite报错：npm ERR! command C:WINDOWSsystem32cmd.exe /d /s /c C:UsersychenAppDataLocalTempnpx-dde1c848.cmd
使用vite构建项目报错 C:\Users\ychen\work&gt;npm init @vitejs/app @vitejs/create-app is deprecated, use npm init vite instead C:\Users\ychen\AppData\Local\npm-
pythonJavaScriptjavaHTMLPHPreactjsC#AndroidCSSNode.jssqlrpython-3.xMysqLjQueryc++pandasFlutterangularIOSdjangolinuxswifttypescript路由器JSON路由器设置无线路由器h3c华三华三路由器设置华三路由器电脑软件教程arraysdocker软件图文教程Cvue.jslaravelspring-boot