1、引入微信官方的js文件，将该js文件放到最前面引入：<script src="https://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>

2、初始化微信所需参数：

2.1 注意：wx.config必须在页面加载时完成执行，wx.ready可以放到方法内通过触发执行。

//初始化微信
    var url = null;
    var jsapi_ticket = null;
    var nonceStr = null;
    var timestamp = null;
    var signature = null;

var showURL = null;

var appid = null;

$.ajax({
        cache: false,
        type: "GET",
        url: "../oAuth/configParam",//此处的url是获取微信参数的后台方法，也可通过前端实现
        dataType: "json",
        data: {
            currentPageUrl: window.location.href,//url指引方法的参数列表
            
        },
        error: function (error) {
            
            window.location = "../oAuth/error?message" + error.toString()
        },
        success: function (map) {
            //url = map["url"];
            jsapi_ticket = map["jsapi_ticket"];
            nonceStr = map["nonceStr"];
            timestamp = map["timestamp"];
            signature = map["signature"];
            appid = map["appid"];
            //shareUrl = map["redshareurl"];
            alert(appid);
            wx.config({
                debug: true, // 开启调试模式,调用的所有api的返回值会在客户端alert出来，若要查看传入的参数，可以在pc端打开，参数信息会通过log打出，仅在pc端时才会打印。
                appId: appid, // 必填，公众号的唯一标识
                timestamp: timestamp, // 必填，生成签名的时间戳
                nonceStr: nonceStr, // 必填，生成签名的随机串
                signature: signature,// 必填，签名，见附录1
                jsApiList: [//此处列表，用到哪些方法，必须要在此提前声明，我当时要用到hideMenuItems，但是因为没有在此出声明，一直不起作用，后来查资料才知道，并且这                             //些方法必须放到wx.ready中
                    'checkJsApi',
                    'onMenuShareTimeline',
                    'onMenuShareAppMessage',
                    'hideMenuItems'
                ] // 必填，需要使用的JS接口列表，所有JS接口列表见附录2
            });
            
            wx.ready(function () {
                //2.3 隐藏不用的按钮
                alert("隐藏不用的按钮");
                wx.hideMenuItems({
                    menuList: ['menuItem:share:qq',
                               'menuItem:share:weiboApp',
                               'menuItem:favorite',
                               'menuItem:share:facebook',
                               'menuItem:share:QZone'], // 要隐藏的菜单项，只能隐藏“传播类”和“保护类”按钮，所有menu项见附录3
                    success:function(res){
                        //alert("隐藏");
                    }
                });

wx.checkJsApi({
                                    jsApiList: [
                                        'getNetworkType',
                                        'previewImage'
                                    ],
                                    success: function (res) {
//                                        alert(JSON.stringify(res));
                                    }
                                });
                                /*wx.showMenuItems({
                                    menuList: ['onMenuShareAppMessage',
                                               'onMenuShareTimeline'] // 要显示的菜单项，所有menu项见附录3
                                });*/
                                // 2. 分享接口
                                // 2.1 监听“分享给朋友”，按钮点击、自定义分享内容及分享结果接口
                                wx.onMenuShareAppMessage({
                                    title: '话费购',
                                    desc: '话费红包，点击领取',
                                    link: shareUrl,
                                    imgUrl: 'http://wuming_ise.ngrok.cc/wcpay/images/tubiao.png',
                                    trigger: function (res) {
                                        // 不要尝试在trigger中使用ajax异步请求修改本次分享的内容，因为客户端分享操作是一个同步操作，这时候使用ajax的回包会还没有返回
                                        //alert("点击分享朋友"+shareUrl);
                                    },
                                    success: function (res) {
                                        dismiss();
                                    },
                                    cancel: function (res) {
                                        dismiss();
                                    },
                                    fail: function (res) {
                                        dismiss();
//                                        alert(JSON.stringify(res));
                                    }
                                });
                                //alert('已注册获取“发送给朋友”状态事件');

// 2.2 监听“分享到朋友圈”按钮点击、自定义分享内容及分享结果接口
                                wx.onMenuShareTimeline({
                                    title: '话费购',
                                    link: shareUrl,
                                    imgUrl:  'http://wuming_ise.ngrok.cc/wcpay/images/tubiao.png',
                                    trigger: function (res) {
                                        // 不要尝试在trigger中使用ajax异步请求修改本次分享的内容，因为客户端分享操作是一个同步操作，这时候使用ajax的回包会还没有返回
                                        alert("分享到朋友圈"+shareUrl);
                                    },
                                    success: function (res) {
                                        dismiss();
                                    },
                                    cancel: function (res) {
                                        dismiss();
                                    },
                                    fail: function (res) {
                                        dismiss();
                                        
                                        alert(JSON.stringify(res));
                                    }
                                });

});
            
        }
    });

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