360度动态影像

Question

如何将图像360度从起点移动到终点？ 动态影像360度？

Answer 1

您可以将视图旋转一定数量的弧度，而无论它小于完整旋转还是完整旋转的许多倍，而不必将旋转拆分为多个部分。 例如，以下代码将每秒旋转一次视图一次指定的秒数。 您可以轻松地对其进行修改，以旋转一定角度或一定弧度来旋转视图。

- (void) runSpinAnimationWithDuration:(CGFloat) duration;
{
    CABasicAnimation* rotationAnimation;
    rotationAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];
    rotationAnimation.toValue = [NSNumber numberWithFloat: M_PI * 2.0 /* full rotation*/ * rotations * duration ];
    rotationAnimation.duration = duration;
    rotationAnimation.cumulative = YES;
    rotationAnimation.repeatCount = 1.0; 
    rotationAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut];

    [myView.layer addAnimation:rotationAnimation forKey:@"rotationAnimation"];
}

Answer 2

任何轴上360度旋转都会使视图保持不变。 因此，请勿触摸图像，您一切顺利！

Answer 3

您也可以为此使用动画函数（CAValueFunction）：

CABasicAnimation *rotationAnimation = [CABasicAnimation animationWithKeyPath:@"transform"];
rotationAnimation.duration = duration;
rotationAnimation.fromValue = [NSNumber numberWithFloat:0.0];
rotationAnimation.toValue = [NSNumber numberWithFloat:M_PI * 2.0];
rotationAnimation.valueFunction = [CAValueFunction functionWithName:kCAValueFunctionRotateZ];
rotationAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut];

[myView.layer addAnimation:rotationAnimation forKey:nil];