Question

这是我的动画代码：

  CABasicAnimation *fullRotation = [CABasicAnimation animationWithKeyPath:@"transform.rotation"];
    fullRotation.toValue = [NSNumber numberWithFloat:((360*M_PI)/180)];
    fullRotation.duration = 4;
    fullRotation.repeatCount= 1000;
    [[stick layer] addAnimation:fullRotation forKey:@"60"];

      fullRotation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];

我试图旋转＆＃34;坚持＆＃34;它本身周围，但它似乎围绕另一个点旋转，这默认是原点。我该怎么做才能让它绕自身完成360度旋转？提前谢谢。

Answer 1

如果你想改变棍子使用的锚点：

stick.layer.anchorPoint = CGPointMake(1.0,1.0);

https://developer.apple.com/library/mac/documentation/GraphicsImaging/Reference/CALayer_class/Introduction/Introduction.html#//apple_ref/occ/instp/CALayer/anchorPoint

我使用的旋转代码：

CABasicAnimation *rotateAnim = [CABasicAnimation animationWithKeyPath:@"transform.rotation"];
    rotateAnim.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
    rotateAnim.fromValue = [NSNumber numberWithFloat:0];
    rotateAnim.toValue = [NSNumber numberWithFloat:(360 * M_PI / 180.0f)];
    rotateAnim.repeatCount = HUGE_VALF;
    rotateAnim.duration = 2.5;
    rotateAnim.removedOnCompletion = NO;

    [view.layer addAnimation:rotateAnim forKey:@"rotationAnimation"];

CABasic对象周围的动画（360度）

1 个答案: