Question

我创建了一个图像数组并使用以下方法对其进行了动画处理：

imageview.animationImages = images;

imageview.animationDuration = 1;

imageview.animationRepeatCount = 1;

[imageview startAnimating];

这里imageview是指向UIImageView对象的指针，images是数组。我正在使用圆形矩形按钮来触发动画。当我在模拟器打开后第一次运行动画时...动画不会与声音同步，但是当我再次按下按钮使用它之后它就会发生。知道为什么吗？我正在使用系统声音API来播放短音。我为声音创建id，然后使用以下方式播放：

AudioServicesPlaySystemSound(soundID);

我的猜测是，当我第一次触发动画时，模拟器需要一些时间来处理我正在使用的图像并构建数组。我总共使用了45张图片。因此，声音保持在动画图像之前。但是当我再次尝试时，图像已经被处理，因此动画和声音都是同步的。但这只是猜测。我不知道该怎么做。如果你想看看这里的整个代码，那就是：

-(IBAction)btnclicked:(id)sender { 
    NSMutableArray *images = [[NSMutableArray alloc]init]; //all alloc does is allocate memory. The -init method is crucial to actually initialize the object into a working state.
    for (int imagenumber = 1; imagenumber <= 45; imagenumber++) {
        NSMutableString *myString = [NSMutableString stringWithFormat:@"%i.png", imagenumber];
        [images addObject:[UIImage imageNamed:myString]];
    }
    CGRect frame = CGRectMake(0.0, 0.0, 320, 460);
    UIImageView *imageview = [[UIImageView alloc] initWithFrame:frame];
    imageview.contentMode = UIViewContentModeScaleToFill;
    imageview.animationImages = images;

    imageview.animationDuration = 3.2;

    imageview.animationRepeatCount = 1;

    [imageview startAnimating];

    [self.view addSubview:imageview];

    AudioServicesDisposeSystemSoundID(soundID);
    NSString *path = [[NSBundle mainBundle] pathForResource:@"giggity stick around" ofType:@"wav"];
    NSURL *url = [NSURL fileURLWithPath:path];
    AudioServicesCreateSystemSoundID((CFURLRef)url, &soundID);
    AudioServicesPlaySystemSound(soundID);
    [imageview release];

}

为了避免任何混淆......我的图像被命名为1.png，2.png等等，这就是我在构建数组时使用迭代的原因。

Answer 1

最好的方法是创建一个播放声音的函数： - （void）playSound，然后在你的按钮动作中你应该写一个playSound函数的链接：[self playSound]。这里很简单：

-(IBAction)XXX:(id)sender
{
    //your imagesArray
    [self playSound];
    imageview.animationDuration = 1;
    imageview.animationRepeatCount = 1;
    [imageview startAnimating];
}

-(void)playSound
{
    //yourcode for playing the sound
}

希望得到它的帮助。

编辑：试试这个：

-(IBAction)btnclicked:(id)sender { 
NSMutableArray *images = [[NSMutableArray alloc]init]; //all alloc does is allocate memory. The -init method is crucial to actually initialize the object into a working state.
for (int imagenumber = 1; imagenumber <= 45; imagenumber++) {
    NSMutableString *myString = [NSMutableString stringWithFormat:@"%i.png", imagenumber];
    [images addObject:[UIImage imageNamed:myString]];
}
CGRect frame = CGRectMake(0.0, 0.0, 320, 460);
UIImageView *imageview = [[UIImageView alloc] initWithFrame:frame];
imageview.contentMode = UIViewContentModeScaleToFill;

    NSURL *url = [NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/giggity stick around.wav", [[NSBundle mainBundle] resourcePath]]];
soundPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
soundPlayer.volume = 1;
[soundPlayer play];    

imageview.animationImages = images;

imageview.animationDuration = 3.2;

imageview.animationRepeatCount = 1;

[imageview startAnimating];

[self.view addSubview:imageview];

}

我使用AVFoundation播放音频，请立即检查。

将动画与声音同步

1 个答案: