# 微信jssdk - 拉起卡券
> 所有需要微信jssdk中 拉起卡券的业务模块，只需在需分享页面</body>标签前使用
WechatIndex.php
~~~
构建参数：
$throw_wechat_card_params = [
'appid'=>$this->wechat_account_info['authorizer_appid'],
'card_id'=>[
'p_7k0xKFsNiPiJ31cEw7weu8FFzY'
]
];
传递参数至模板引擎：
return $this->fetch($this->addon_template.'/wechat_index/entry',[
'throw_wechat_card_params'=>$throw_wechat_card_params, ]);
~~~
HTML
~~~
{:hook('throwWechatCard',$throw_wechat_card_params)}
此时底层会自动生成一个拉起卡券的方法，如下:
function _add_wechat_card(success_callback,cancel_callback)
{
console.log(success_callback);
wx.addCard({
cardList: card,
success: function (res) {
//成功领卡后回调
success_callback(res);
},
cancel: function (res) {
//取消后 回调
cancel_callback(res);
}
});
}
需要前端工程师编写回调函数。即 success_callback cancel_callback
接受参数为领卡或者取消领卡的返回值。
_add_wechat_card(success_callback,cancel_callback)
如：
function success_callback(res){alert('666')}
function cancel_callback(res){alert('666')}
~~~
#### 举例完整页面
~~~
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
entry
<script>
function alert() {
console.log('sssss');
}
</script>
<button onclick="_add_wechat_card(alert,alert)">sss</button>
<!--引入公共js类库-->
<script src="{php} echo config('static_host');{/php}/common/jquery.min.js"></script>
<!--引入第三方类库-->
<script src="{php} echo config('static_host');{/php}/extend/layui/layui.js"></script>
<!--引入模块js-->
<script src="{php} echo config('static_host');{/php}/addon/{$addon_info['name']}/{$addon_setting['template']}/main.js"></script>
{:hook('wechatJssdk',$wechat_jssdk_hook_params)}
{:hook('shareWechatJssdk')}
{:hook('throwWechatCard',$throw_wechat_card_params)}
</body>
</html>
~~~
