<button @click="toAuth">登录</button>

去获取按钮

// 授权登录
toAuth() {
    console.log('------------------')
    uni.getUserProfile({
                
        desc: "您即将授权登录香江购物",
        success: (res1) => {
            const userInfo = res1.userInfo;
            console.log(userInfo)
        },
        fail: (err) => {
            console.log(err)
        }
    })
}