我有一个TabBarController
有两个选项卡,我想在两个选项卡上播放音乐。现在我的代码在主目录上appDelegate
NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle]
pathForResource:@"My Song"
ofType:@"m4a"]]; // My Song.m4a
NSError *error;
self.audioPlayer = [[AVAudioPlayer alloc]
initWithContentsOfURL:url
error:&error];
if (error)
{
NSLog(@"Error in audioPlayer: %@",
[error localizedDescription]);
} else {
//audioPlayer.delegate = self;
[audioPlayer prepareToPlay];
}
但我收到错误Program received signal: "SIGABRT"
on UIApplicationMain
有没有更好的方法来完成我想做的事情?如果我应该这样做,我应该从哪里开始检查问题?
是的,您可以在 App Delegate 中使用 AVAudioPlayer。
您需要做的是:-
在 appDelegate.h 文件中执行以下操作:-
#import <AVFoundation/AVFoundation.h>
#import <AudioToolbox/AudioToolbox.h>
AVAudioPlayer *_backgroundMusicPlayer;
BOOL _backgroundMusicPlaying;
BOOL _backgroundMusicInterrupted;
UInt32 _otherMusicIsPlaying;
Make backgroundMusicPlayer
属性并综合它。
In appDelegate.m
文件做:-
在 did FinishLaunching 方法中添加这些行
NSError *setCategoryError = nil;
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryAmbient error:&setCategoryError];
// Create audio player with background music
NSString *backgroundMusicPath = [[NSBundle mainBundle] pathForResource:@"SplashScreen" ofType:@"wav"];
NSURL *backgroundMusicURL = [NSURL fileURLWithPath:backgroundMusicPath];
NSError *error;
_backgroundMusicPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:backgroundMusicURL error:&error];
[_backgroundMusicPlayer setDelegate:self]; // We need this so we can restart after interruptions
[_backgroundMusicPlayer setNumberOfLoops:-1]; // Negative number means loop forever
现在实现委托方法
#pragma mark -
#pragma mark AVAudioPlayer delegate methods
- (void) audioPlayerBeginInterruption: (AVAudioPlayer *) player {
_backgroundMusicInterrupted = YES;
_backgroundMusicPlaying = NO;
}
- (void) audioPlayerEndInterruption: (AVAudioPlayer *) player {
if (_backgroundMusicInterrupted) {
[self tryPlayMusic];
_backgroundMusicInterrupted = NO;
}
}
- (void)tryPlayMusic {
// Check to see if iPod music is already playing
UInt32 propertySize = sizeof(_otherMusicIsPlaying);
AudioSessionGetProperty(kAudioSessionProperty_OtherAudioIsPlaying, &propertySize, &_otherMusicIsPlaying);
// Play the music if no other music is playing and we aren't playing already
if (_otherMusicIsPlaying != 1 && !_backgroundMusicPlaying) {
[_backgroundMusicPlayer prepareToPlay];
if (soundsEnabled==YES) {
[_backgroundMusicPlayer play];
_backgroundMusicPlaying = YES;
}
}
}
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