旋转小图动画

<pre><code>///点击一个 调用3次的 颜色 下拉动画 旋转小图图标

#pragma mark - animation

- (void)animateIndicator:(CAShapeLayer *)indicator Forward:(BOOL)forward complete:(void(^)())complete

{

[CATransaction begin];

[CATransaction setAnimationDuration:0.25];

[CATransaction setAnimationTimingFunction:[CAMediaTimingFunction functionWithControlPoints:0.4 :0.0 :0.2 :1.0]];

CAKeyframeAnimation *anim = [CAKeyframeAnimation animationWithKeyPath:@"transform.rotation"];

anim.values = forward ? @[ @0, @(M_PI) ] : @[ @(M_PI), @0 ];

if (!anim.removedOnCompletion) {

[indicator addAnimation:anim forKey:anim.keyPath];

} else {

[indicator addAnimation:anim andValue:anim.values.lastObject forKeyPath:anim.keyPath];

}

[CATransaction commit];

indicator.fillColor = forward ? _tableView.tintColor.CGColor : _menuColor.CGColor;

complete();

}</code></pre>