KYNewtonCradleAnimiation

牛顿摆动画

已经封装成HUD.

##How to use?

Step1: #import "KYLoadingHUD.h"

Step2: Initiate

    hud = [[KYLoadingHUD alloc]initWithFrame:CGRectMake(self.view.bounds.size.width / 2 - 50, self.view.bounds.size.height / 2 -100, 100, 100)];
    [self.view addSubview:hud];
    [hud showHUD]; // 显示

在取消隐藏的地方： [hud dismissHUD];

ENJOY!