ObjectAL:崩溃的fadeTo:时间:目标:选择:
问题描述:
出于某种原因,我不知道为什么,我的应用程序一直在OALAudioTrack对象上fadeTo方法崩溃。ObjectAL:崩溃的fadeTo:时间:目标:选择:
我有其是在阵列内三个不同OALAudioTrack目的和我只需要改变一个OALAudioTrack对象,如果一个给定值是不同的。当该值是不同的,我需要褪色OALAudioTrack对象出来,然后淡入新OALAudioTrack对象和替换数组中的OALAudioTrack对象,但我不能这样做,因为它一直这样做第一淡出(为0.0f时崩溃)。当应用程序发生崩溃它总是崩溃在同一行上,这是OALActionManager.m线#159内(NSUInteger指数= [目标indexOfObject:action.target])和误差说“线程1 EXE_BAD_ACCESS”。是不是有什么做的逝去之前我必须做的,任何帮助将不胜感激,因为我一直在看它在一天,我似乎无法让过去这个错误。我使用的代码如下:
if ([[self.soundScapes objectAtIndex:i] isKindOfClass:[OALAudioTrack class]])
{
[self.tmpSoundScapes removeAllObjects];
[self.tmpSoundScapes addObject:[fnArr objectAtIndex:i]];
[self.tmpSoundScapes addObject:[NSNumber numberWithInt:i]];
OALAudioTrack *currentTrack = [self.soundScapes objectAtIndex:i];
if ([currentTrack playing])
{
NSLog(@"is playing");
[currentTrack stopFade];
//This is where the app crashes
[currentTrack fadeTo:0.0 duration:1.5 target:self selector:@selector(onFadeComplete:)];
}
}
-(void)onFadeComplete:(id)sender
{
NSLog(@"fade complete");
NSString *fn = [self.tmpSoundScapes objectAtIndex:0];
int i = [[self.tmpSoundScapes objectAtIndex:1] intValue];
OALAudioTrack *currentTrack = [self.soundScapes objectAtIndex:i];
[currentTrack stop];
currentTrack = nil;
OALAudioTrack* track = [OALAudioTrack track];
[track preloadFile:fn];
track.autoPreload = YES;
track.numberOfLoops = -1; // Loop forever when playing.
track.gain = 0.0f; // volume
[track play];
[self.soundScapes replaceObjectAtIndex:i withObject:track];
[self.soundScapesFiles replaceObjectAtIndex:i withObject:fn];
int timer;
if (i==1)
timer = 10.0f;
else if (i==2)
timer = 25.0f;
else
timer = 0.5f;
// [self performSelector:@selector(onPlayScoundScape:) withObject:[NSNumber numberWithInt:i] afterDelay:timer];
[track fadeTo:1.0f duration:timer target:self selector:@selector(onPlayScoundScape:)];
}
答
这都崩溃是“action.target”的一部分。 “目标”是一个弱引用,所以如果动作完成之前你跟踪解除分配,它会崩溃。
我怀疑在某些时候你的代码要么在其他方法中从self.soundScapes中删除轨道,要么在另一个onFadeComplete调用中生成相同的索引(从而逐出当前衰落的轨道)轨道淡入完成。