CAKeyframe动画和音频同步

发布于 2024-12-06 20:02:19 字数 946 浏览 2 评论 0原文

我正在使用 CAKeyframeAnimation 在我的应用程序中执行一些动画。我想与动画一起播放音频文件（有时在期间，有时在之后）。我怎样才能实现这个目标？是否有 CAKeyframeAnimation 的 AnimationDidStopSelector 或者是否有其他方法可以做到这一点？

UIBezierPath *movePath = [UIBezierPath bezierPath];
            [movePath moveToPoint:imageAnimation.center];
            [movePath addQuadCurveToPoint:CGPointMake(839, 339)
                             controlPoint:CGPointMake(671, 316)];

            CAKeyframeAnimation *moveAnim = [CAKeyframeAnimation animationWithKeyPath:@"position"];
            moveAnim.path = movePath.CGPath;
            CAAnimationGroup *animGroup = [CAAnimationGroup animation];
            animGroup.animations = [NSArray arrayWithObjects:moveAnim, nil];
            animGroup.duration = 0.5;
            imageAnimation.layer.position = CGPointMake(839, 339);
            imageAnimation.tag = 0;
            [imageAnimation.layer addAnimation:animGroup forKey:nil];
            break;

原文

I am using CAKeyframeAnimation to perform few animations in my app. I would like to play an audio file (sometimes during and sometimes after) along with the animations. How can I achieve this? Is there a AnimationDidStopSelector for CAKeyframeAnimation or is there another approach for doing this?

UIBezierPath *movePath = [UIBezierPath bezierPath];
            [movePath moveToPoint:imageAnimation.center];
            [movePath addQuadCurveToPoint:CGPointMake(839, 339)
                             controlPoint:CGPointMake(671, 316)];

            CAKeyframeAnimation *moveAnim = [CAKeyframeAnimation animationWithKeyPath:@"position"];
            moveAnim.path = movePath.CGPath;
            CAAnimationGroup *animGroup = [CAAnimationGroup animation];
            animGroup.animations = [NSArray arrayWithObjects:moveAnim, nil];
            animGroup.duration = 0.5;
            imageAnimation.layer.position = CGPointMake(839, 339);
            imageAnimation.tag = 0;
            [imageAnimation.layer addAnimation:animGroup forKey:nil];
            break;

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吃素的狼 2024-12-13 20:02:19

其实是有的。首先将自己指定为委托：

animGroup.delegate = self

如果您想使用不同的动画，可以使用 KVC 来区分它们：

[yourAnimation setValue:@"firstAnimation" forKey:@"animationName"];

然后实现此方法

- (void)animationDidStop:(CAAnimation *)theAnimation finished:(BOOL)flag
{
    if (flag && [[anim valueForKey:@"animationName"] isEqualToString:@"firstAnimation"]) {
        //play your sound
    }
    else if (flag && [[anim valueForKey:@"animationName"] isEqualToString:@"secondAnimation"]) {
        //do something else
    }
}

Actually there is. First assign yourself as delegate:

animGroup.delegate = self

If you want to use different animations you can use KVC to differentiate between them:

[yourAnimation setValue:@"firstAnimation" forKey:@"animationName"];

Then implement this method

- (void)animationDidStop:(CAAnimation *)theAnimation finished:(BOOL)flag
{
    if (flag && [[anim valueForKey:@"animationName"] isEqualToString:@"firstAnimation"]) {
        //play your sound
    }
    else if (flag && [[anim valueForKey:@"animationName"] isEqualToString:@"secondAnimation"]) {
        //do something else
    }
}

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