按下主屏幕按钮在后台播放音乐

Question

我想播放音乐背景，为此我在info.plist中进行了更改。 我将“应用程序不能在后台运行”设置为“ 否” ， 应用程序需要在背景模式下播放音频 。

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];

}

但是当我按下主屏幕按钮时音乐不再播放。 任何想法请我错了吗？

Answer 1

您应该将“ Applications does not run in background设置为“否”

Answer 2

并在homeBtnEventMethod的homeBtn屏幕上播放音频

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

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

3.）在viewDidLoad中的viewController.m中

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

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