pod ‘MMTweenAnimation‘

MMTweenAnimation *anim = [MMTweenAnimation animation];
anim.functionType   = MMTweenFunctionBounce;
anim.easingType     = MMTweenEasingOut;
anim.duration       = 2.0f;
anim.fromValue      = 0;
anim.toValue        = 200;
anim.animationBlock = ^(double c,double d,double v,id target,MMTweenAnimation *animation)
{
    //c: current time, from the beginning of animation
    //d: duration, always bigger than c
    //v: value, after the change at current time

    UIView *t = (UIView*)target;
    t.center = CGPointMake(t.x, v);
};

[targetView pop_addAnimation:anim forKey:@"center.y"];