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按下主页按钮时在后台播放音乐

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我想播放音乐背景，为此我在info.plist中进行了更改 . 我设置应用程序不在后台运行到NO，所需的后台模式到App播放音频 .

我在AppDelegate中添加了这个：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    [[AVAudioSession sharedInstance] setDelegate:self];
    [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];
    [[AVAudioSession sharedInstance] setActive:YES error:nil];
    [[UIApplication sharedApplication] beginReceivingRemoteControlEvents];

}

- (void)applicationDidEnterBackground:(UIApplication *)application {
    AVAudioSession *audioSession = [AVAudioSession sharedInstance];
    NSError *error = nil;
    NSLog(@"Activating audio session");
    if (![audioSession setCategory:AVAudioSessionCategoryPlayback withOptions:AVAudioSessionCategoryOptionDuckOthers error:&error]) {
        NSLog(@"Unable to set audio session category: %@", error);
    }
    BOOL result = [audioSession setActive:YES error:&error];
    if (!result) {
        NSLog(@"Error activating audio session: %@", error);
    }
    [[UIApplication sharedApplication] beginReceivingRemoteControlEvents];

}

但是当我按下主页按钮时音乐不再播放了 . 请问我哪里错了？

ios objective-c avaudioplayer

2 回答

  • 2

    enter image description here

    并在homeBtnEventMethod上的homeBtn屏幕上播放音频

    1.）in viewController.h #import <AVFoundation/AVAudioPlayer.h>

    2.） @property (nonatomic, strong) AVAudioPlayer *theAudio;

    3.）在viewDidLoad的 viewController.m 中

    NSError *error = nil;
self.theAudio = [[AVAudioPlayer alloc] initWithContentsOfURL:soundURL error:&error];

    4.） - (IBAction)homeBtnTpd { [self.theAudio play]; }

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  • 2

    您应该将 Applications does not run in background 设置为NO

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