按下主页按钮时在后台播放音乐

Question

我想播放音乐背景，为此我在 info.plist 中进行了更改。我将应用程序在后台运行设置为 NO，将所需的后台模式设置为 App plays audio.

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。请问我哪里错了？

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 #import <AVFoundation/AVAudioPlayer.h>

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

3.) 在 viewController.m 在 viewDidLoad

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

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

按下主页按钮时在后台播放音乐

Play music in background when home button is press

objective-c

avaudioplayer

ios