小编Fan*_*nic的帖子

我用下面的代码来实现替换场景的效果:

[[CCDirector sharedDirector] replaceScene:[CCTransitionPageTurn transitionWithDuration:0.5f scene:alterScene backwards:NO]];

然后,反转的效果看起来好像传入场景从传出场景左侧转过来.
我想让效果从顶部转过来.我怎么能得到这个？

-(IBAction)voiceBroadcast
{

    if ([audioPlayer isPlaying]) {
        [audioPlayer stop];
        [NSObject cancelPreviousPerformRequestsWithTarget:self];
    }


    else {
        if (nil != audioPlayer) {
            [audioPlayer play];
            audioPlayer.volume = 0.0;
            [self performSelector:@selector(doBgMusicFadeIn)];
            [self performSelector:@selector(doBgMusicFadeDown) withObject:nil afterDelay:3];
            [self performSelector:@selector(startVoiceBroadcast) withObject:nil afterDelay:4];

        }
    }
}

-(void)dealloc
{
    //position
    [NSObject cancelPreviousPerformRequestsWithTarget:self];

    [super dealloc];

}

将cancelPreviousPerformRequestsWithTarget:self在dealloc叫,但不工作时,选择仍可以调用.但是,cancelPreviousPerformRequestsWithTarget:self在voiceBroadcast没有问题.该cancelPreviousPerformRequestsWithTarget方法不能用于dealloc？