ios - UIView 动画整圈旋转反向与 UIViewAnimationOptionCurveEaseInOut

Question

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

这个动画怎么会是一个完整的圆圈旋转，同时仍然加速和减速。如果我使用 2 * M_PI 动画不会移动。

Answer 1

我认为这应该适合你：

- (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"];
}

Answer 2

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

        [UIView animateWithDuration:3 delay:0 options:UIViewAnimationOptionCurveEaseInOut animations:^{
        self.animatedImageView.transform = CGAffineTransformRotate(self.animatedImageView.transform, (2*M_PI)-0.001); //  -0.001 will do the right way
    } completion:^(BOOL finished){}];


}];

Answer 3

这应该有效。您可以更改动画类型：UIViewAnimationTransitionFlipFromRight。

[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:1.0];
[UIView setAnimationTransition:(UIViewAnimationTransitionFlipFromRight)
                       forView:Your_View cache:YES];
[UIView commitAnimations];