新浪微博加号按钮动画实现方案

1.使用UIView的动画实现：

+ (void)animateWithDuration:(NSTimeInterval)duration delay:(NSTimeInterval)delay usingSpringWithDamping:(CGFloat)dampingRatio initialSpringVelocity:(CGFloat)velocity options:(UIViewAnimationOptions)options animations:(void (^)(void))animations completion:(void (^)(BOOL finished))completion

该方法的使用可见：http://blog.csdn.net/jacob_ios/article/details/51678444 2.动画方案二：

CABasicAnimation *positionAnimation; positionAnimation = [CABasicAnimation animationWithKeyPath:@"position"]; positionAnimation.fromValue = [NSValue valueWithCGPoint:fromPosition]; positionAnimation.toValue = [NSValue valueWithCGPoint:toPosition];

整个实现的详细过程代码：https://github.com/xinyuly/XYMenuAnimateView