Question

我尝试在AnimationGroup中的特定时间播放声音我怎么能这样做。

我应该使用NSTimer还是其他计时器？

for (int i = 0; i<[bildr count];  i++) {
    ...
    CABasicAnimation *fadeInAnimation;

    if([[[bildr objectAtIndex:i] objectForKey:@"animation"] isEqualToString:@"fadeIn"])    {

        greenLeafImageView.alpha = 0.0;
        fadeInAnimation = [CABasicAnimation animationWithKeyPath:@"opacity"];
        [fadeInAnimation setToValue:[NSNumber numberWithFloat:1.0]];
        fadeInAnimation.fillMode = kCAFillModeForwards;
        fadeInAnimation.removedOnCompletion = NO;
        fadeInAnimation.duration = [[[bildr objectAtIndex:i] objectForKey:@"duration"] floatValue];
        fadeInAnimation.beginTime = CACurrentMediaTime() + [[[bildr objectAtIndex:i] objectForKey:@"startTime"] floatValue];
    }else{
        // is sound -> time it
    }



    [animArray addObject:fadeInAnimation];
    [greenLeafImageView.layer addAnimation:fadeInAnimation forKey:nil];
    lastpic=i;
}

float totaltime=20.0;

CAAnimationGroup * group = [CAAnimationGroup animation];
group.animations = animArray;
group.duration = totaltime;
[self.view.layer addAnimation:group forKey:nil];

Answer 1

简短回答，是的，NSTimer是你必须走的路。

我写了一个用动画来协调声音的课程。您可以查看here on github。这个类MKSoundCoordinatedAnimationLayer还允许您通过传递NSDictionary相关图像，位置，字母，声音和计时信息来“编写”动画，这反过来允许您配置/将动画保存在运行时加载的plist中，而不是必须修改代码以调整动画。

CAAnimationGroup在动画的beginTime播放声音

1 个答案: