Question

到目前为止，我有这个。我希望图像旋转约30秒然后停下来然后面向另一个方向。

修改。更改了代码。我有这个，但它旋转，并没有停止180度。我希望它旋转几次然后停在相反的方向。

       CAKeyframeAnimation *animation = [CAKeyframeAnimation animationWithKeyPath:@"transform.rotation.z"];
  animation.duration = 0.60;//animation.duration = 0.60;
  animation.repeatCount = 1;//animation.repeatCount = 1000ˆ

//#warning remove comment brackets below

  animation.keyTimes = [NSArray arrayWithObjects:
                        [NSNumber numberWithFloat:0.0],
                        [NSNumber numberWithFloat:1.0], nil];

  animation.values = [NSArray arrayWithObjects:
                      [NSNumber numberWithFloat:0.0],
                      [NSNumber numberWithFloat:(degrees / 180)*M_PI], nil];

  animation.fillMode = kCAFillModeForwards;

如何在图像仍然旋转180度的情况下停止动画。

Answer 1

怎么样

    CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"transform.rotation"];
animation.delegate = self;
animation.autoreverses = YES;
animation.repeatDuration = 30;
animation.duration = 1.0;
animation.fromValue = [NSNumber numberWithFloat:-degreeToRadian(180)];
animation.toValue=[NSNumber numberWithFloat:degreeToRadian(180)];
[self.button.layer addAnimation:animation forKey:@"animation"];

然后添加委托方法

- (void)animationDidStop:(CAAnimation *)theAnimation finished:(BOOL)flag
{
   self.button.transform = CGAffineTransformMakeRotation(degreeToRadian(180));
}

我希望这就是你想要的。

Iphone-如何连续旋转图像30秒并停止180度

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