问题描述
我有一个带有两个选项卡的TabBarController
,我想在两个选项卡上播放音乐.现在我在主appDelegate
I have a TabBarController
with two tabs and I want to play music on both tabs. Right now I have my code on the main 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];
}
但是我在UIApplicationMain
是否有更好的方法来完成我想做的事情?如果这是我应该怎么做,该从哪里开始检查问题?
Is there a better way to accomplish what I'm trying to do? If this is how I should do it, where do I start checking for problems?
推荐答案
是的,您可以在App Delegate中使用AVAudioPlayer.
yes you can use AVAudioPlayer in App Delegate.
您需要做的是:-在appDelegate.h文件中执行:-
What you need to do is:-In appDelegate.h file do:-
#import <AVFoundation/AVFoundation.h>
#import <AudioToolbox/AudioToolbox.h>
AVAudioPlayer *_backgroundMusicPlayer;
BOOL _backgroundMusicPlaying;
BOOL _backgroundMusicInterrupted;
UInt32 _otherMusicIsPlaying;
制作backgroundMusicPlayer
属性并对其进行合成.
Make backgroundMusicPlayer
property and sythesize it.
在appDelegate.m
文件中执行:-
在FinishLaunching方法中添加这些行
Add these lines in did FinishLaunching method
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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