刮刮卡需求：

1.每一位用户有三次刮刮卡的机会

2.本次刮刮卡的结果会覆盖上次的结果

3.刮刮卡的中奖几率呈现为递增的曲线（保证三次中必须有一次中奖）

4.刮出的结果包含按钮既（领取奖品 or 再来一次 ）

5.分享活动奖品升级（这里主要是微信分享的回调了）

6.我们自己的需求，今天就说怎么制作刮刮卡，有这样需求的可以找我要源码-Scratch card demand:

1 every user has three scratch cards opportunities

The results of the 2 scratch cards will cover the last result

3 chance of winning the scratch card appears as increasing curve (to ensure that the three must have a prize)

4 scrape out the results of the button is both (receive prizes once again) or

5 share prizes upgrade (here is WeChat share callback)

6 of our own needs, today said how to make a scratch card, so I can find to be the source of demand