让UIView有弹性移动

[UIView animateWithDuration:1 delay:0.0 usingSpringWithDamping:0.5 initialSpringVelocity:0 options:UIViewAnimationOptionLayoutSubviews animations:^{
        _moveView.top = 400;
    } completion:^(BOOL finished) {
        _moveView.top = 100;
}];