微信小程序button授权页面，用户拒绝后仍可再次授权

// 获取用户信息
wx.getSetting({
success: res => {
if (res.authSetting['scope.userInfo']) {
// 已经授权，可以直接调用 getUserInfo 获取头像昵称，不会弹框
wx.getUserInfo({
success: res => {
// 可以将 res 发送给后台解码出 unionId
this.globalData.userInfo = res.userInfo // 由于 getUserInfo 是网络请求，可能会在 Page.onLoad 之后才返回
// 所以此处加入 callback 以防止这种情况
if (this.userInfoReadyCallback) {
this.userInfoReadyCallback(res)
}
}
})
}else{
// 未授权，跳转到授权页面
wx.reLaunch({
url: '/pages/auth/auth',
})
}
}
})

<view class="auth">
<image src="https://res.wx.qq.com/wxopenres/htmledition/images/favicon32f740.ico" class="img" mode="aspectFill"></image>
<view class="title">微信授权页面</view>
<view class="describe">此页面是微信授权页面，点击下方按钮弹出授权或跳转页面</view>
<button class="btn" open-type='getUserInfo' wx:if="{{canIUse}}" bindgetuserinfo='onAuth'>点击微信授权</button>
<navigator wx:if="{{!canIUse}}" class="btn" url="/pages/auth/auth" open-type="reLaunch" hover-class="other-navigator-hover">已经授权点击调转</navigator>
</view>

/* 开始 */
page {
height: 100%;
display: table;
}.auth {
margin-top: 0;
text-align: center;
display: table-cell;
flex-direction: column;
flex-wrap: wrap;
justify-content: center;
align-items: flex-start;
padding: 100rpx;
vertical-align: middle;
}.img {
border-radius: 50%;
border: 1px solid #fff;
background-color: #fff;
margin: 0 0 60rpx;
display: inline-block;
width: 200rpx;
height: 200rpx;
line-height: 0;
}.title {
display: inline-block;
width: 100%;
margin: 0 0 60rpx;
}.describe {
color: #a7aaa9;
font-size: 26rpx;
margin: 0 0 60rpx;
border-radius: 50%;
text-align: center;
display: inline-block;
width: 100%;
}.btn {
padding: 0 60rpx;
background-color: #19be6b;
margin: 20rpx 0 200rpx;
text-align: center;
vertical-align: middle;
touch-action: manipulation;
cursor: pointer;
background-image: none;
white-space: nowrap;
user-select: none;
font-size: 14px;
border: 0 !important;
position: relative;
text-decoration: none;
height: 44px;
line-height: 44px;
box-shadow: inset 0 0 0 1px #19be6b;
background: #fff !important;
color: #19be6b !important;
display: inline-block;
border-radius: 10rpx;
}

var app = getApp();
Page({
data: {
canIUse: wx.canIUse('button.open-type.getUserInfo')
},
onAuth() {
wx.getSetting({
success: (res) => {
if (res.authSetting['scope.userInfo']) {
wx.reLaunch({
url: '../index/index',
})
}
}
})
}
})