UIView的动画整圈旋转与UIViewAnimationOptionCurveEaseInOut逆转 [英] UIView animation full circle rotation reverse with UIViewAnimationOptionCurveEaseInOut

问题描述

           [UIView animateWithDuration:3 delay:0 options:( UIViewAnimationOptionCurveEaseInOut |
                                                       UIViewAnimationOptionAutoreverse | UIViewAnimationOptionRepeat |
                                                       UIViewAnimationOptionAllowUserInteraction) animations:^{
            self.animatedImageView.transform = CGAffineTransformRotate(self.animatedImageView.transform, M_PI);
        } completion:^(BOOL finished){}];

这动画怎么可能一整圈旋转，同时还加速和deaccelerating。如果我使用2 * M_PI动画是不动的。

How can this animation be a full circle rotation while still accelerating and deaccelerating. if I use 2 * M_PI the animation is not moving.

推荐答案

我认为这应该为你工作：

I think this should work for you:

- (IBAction)rotate:(UIButton *)sender {

    CABasicAnimation *rotationAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];
    rotationAnimation.toValue = @(M_PI * 2.0);
    rotationAnimation.duration = 1;
    rotationAnimation.autoreverses = YES;
    rotationAnimation.repeatCount = HUGE_VALF;
    rotationAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
    [self.iv.layer addAnimation:rotationAnimation forKey:@"rotationAnimation"];
}

这篇关于UIView的动画整圈旋转与UIViewAnimationOptionCurveEaseInOut逆转的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！