简单概述一下效果：第一次点击了取消，之后点击的时候会一直出现获取权限弹框

.wxml文件

<button class='mark'  wx:if="{{canIUse}}"   open-type="getUserInfo" bindgetuserinfo="bindGetUserInfo"></button>

.js文件

const app = getApp();Page({    data: {        canIUse: wx.canIUse('button.open-type.getUserInfo'),        view: {            height: null        }    },    onLoad: function (options) {        var that = this;        wx.getSystemInfo({            success: function (res) {                //   console.log(res);                wx.setStorageSync('viewHeight', res.windowHeight);                //设置高度，根据当前设备宽高满屏显示                that.setData({                    view: {                        height: res.windowHeight                    }                })            }        });        wx.login({            success: function (res) {                if (res.code) {                    wx.request({                        url: app.globalData.url + 'index.php/api/Api/get_openid_api',                        data: {                            code: res.code                        },                        method: "GET",                        success: function (response) {                            if (response.data.status == 200) {                                wx.setStorageSync('openid', response.data.data.openid);                                wx.setStorageSync('uid', response.data.data.uid);                                that.setData({                                    openid: response.data.data.openid                                })                            } else {                                wx.showToast({                                    title: '请求失败',                                    icon: 'loading',                                    duration: 1000                                })                            }                        }                    })                } else {                    console.log('获取用户登录态失败！' + res.errMsg);                }            }        })    },    wc_guide: function () {        wx.navigateTo({            url: '/pages/wc_guide/index',        })    },    bindGetUserInfo: function (e) {        console.log(e);        var that = this;        if (e.detail.userInfo) {            var user_inf = e.detail.userInfo;            wx.request({                url: app.globalData.url + 'index.php/api/Api/get_info',                data: {                    uid: wx.getStorageSync('uid'),                    avatar: user_inf.avatarUrl,                    nickname: user_inf.nickName                },                success: function (res) {                    that.setData({                        canIUse: false                    });                }            });        }    }})