IOS App不在后台运行-Java 学习之路

我希望我的应用程序音频在后台运行，我跟着this tutorial但它没有用 . 当我按下主页按钮时我的应用程序音频仍然停止，我意识到它没有调用"applicationDidBecomeActive"或"applicationDidEnterBackground"（即使我已经禁用了设置"Application does not run in background"，问题仍然存在） . 过去一周我一直在处理这个问题 .

到目前为止我已经完成了这个步骤：

添加了AVFoundation框架并声明

#import <AVFoundation/AVFoundation.h>

enter image description here

在音频中设置AVAudioSession

NSString *audioName = [NSString stringWithFormat:@"audio%d", (nimages)];
        NSString *soundPath =[[NSBundle mainBundle]pathForResource:audioName ofType:@"mp3"];
        NSURL *soundURL = [NSURL fileURLWithPath:soundPath];
        NSError *error = nil;
        AVAudioPlayer *audio = nil;
        audio = [[AVAudioPlayer alloc]initWithContentsOfURL:soundURL error:&error];
        audio.numberOfLoops = -1;
        audio.volume = 0.9;
        if (error) {
            NSLog(@"%@", [error localizedDescription]);
            NSLog(@"Unable to load file");                
        }else {
            //Make sure the system follows our playback status
            [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];
            [[AVAudioSession sharedInstance] setActive: YES error: nil];
            //Load the audio into memory
            [audio prepareToPlay];
        }

在plist中添加行

enter image description here

Updated:

My app is an audio app which the user can play specific soundtrack of my app even though it enter the background. Is it possible?

3 回答

0

我认为必须积极播放音频才能实现这一目标 . 如果您的应用程序“实际上不是音频应用程序”，您可以尝试将应用程序设置为VoIP;这不需要主动连接 . 它也不会阻止其他想要使用音频的应用程序 . 只需设置后台模式为“App提供IP语音服务”，然后它将在后台运行一次最多十分钟;你可以连接一个VoIP套接字并将内容推送到它，如果你想让它保持活动或唤醒它 .

回复于 2024-05-10T19:51:02+08:00
0

我建议你阅读"Apple Human Interface" by clicking here

在允许应用程序在后台工作的情况有限，例如（音频，下载，更新等），您可以在我提供给您的链接中找到所有内容 .

回复于 2024-05-10T19:51:02+08:00

使用它，它将运行其正在运行的代码 .

NSURL * url = [NSURL fileURLWithPath：[NSString stringWithFormat：@“％@ / notification.wav”，[[NSBundle mainBundle] resourcePath]]];

NSError *error;

[[AVAudioSession sharedInstance] setCategory：AVAudioSessionCategoryPlayback error：nil];

AudioSessionInitialize( NULL, NULL, NULL,NULL);
            UInt32 sessionCategory = kAudioSessionCategory_PlayAndRecord;
            AudioSessionSetProperty(kAudioSessionProperty_AudioCategory, sizeof(sessionCategory), &sessionCategory);
            UInt32 value = YES;
            AudioSessionSetProperty(kAudioSessionProperty_OverrideCategoryMixWithOthers, sizeof(value), &value);
            AudioSessionSetProperty(kAudioSessionProperty_OtherMixableAudioShouldDuck, sizeof(value), &value);
            [[AVAudioSession sharedInstance] setActive: YES error: nil];
            AudioSessionSetActive(true);



            // self.appAudioPlayer=audioPlayer;
             AVAudioPlayer  *audioPlayer101 = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error];
            self.audioPlayerForPlay.delegate = self;
            self.audioPlayerForPlay.numberOfLoops=-1;
            [self.audioPlayerForPlay prepareToPlay];
            UInt32 doChangeDefaultRoute = 1;
            AudioSessionSetProperty (kAudioSessionProperty_OverrideCategoryDefaultToSpeaker, sizeof(doChangeDefaultRoute), &doChangeDefaultRoute);





            self.audioPlayerForPlay = audioPlayer101;
            [audioPlayer101 release];
            [self.audioPlayerForPlay play];

回复于 2024-05-10T19:51:02+08:00

IOS App不在后台运行

3 回答

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