这篇文章将会带大家使用客户端来请求云函数
我们简单的来做个登录注册退出~
我们的视频教程(免费)链接为https://static-b5208986-2c02-437e-9a27-cfeba1779ced.bspapp.com/
由于考研所以可能文章比较短也是为了拆分每一步操作
为了方便演示，我们在一个(vue文件)页面文件里面来写

云函数代码

'use strict';
const uniIDs = require('uni-id')
exports.main = async (event, context) => {

	let res = {};
	let params = event.params ? event.params : {};

	const uniID = uniIDs.createInstance({
		context: context
	})

	const noNeedTokens = ['login', 'register', 'logout'];

	if (noNeedTokens.indexOf(event.action) == -1) {
		if (!event.uniIdToken) {
			res = {
				code: 403,
				message: "未携带token"
			}
			return res;
		} else {
			let check_user = await uniID.checkToken(event.uniIdToken, {});
			if (check_user.code === 0) {
				params.uid = check_user.uid;
			} else {
				res = check_user;
				return res;
			}
		}
	}

	switch (event.action) {
		case 'register': {
			const {
				username,
				password
			} = params;
			res = await uniID.register({
				username,
				password
			})
			break;
		}
		case 'login': {
			const {
				username,
				password
			} = params;
			res = await uniID.login({
				username,
				password,
				queryField: ['username', 'email', 'mobile']
			})
			break;
		}
		case 'logout': {
			res = await uniID.logout(event.uniIdToken);
			break;
		}
		default: {
			res = {
				code: 402,
				message: "请求非法"
			}
			break;
		}
	}

	//返回数据给客户端
	return res;
};

客户端调用

完整代码（下面分步讲解）

<template>
	<view class="content">
		<input v-model="username" placeholder="用户名" />
		<input v-model="password" placeholder="密码" />
		<button @click="register()">注册</button>
		<button @click="login()">登录</button>
		<button @click="logout()">退出</button>
		<text>{{token}}</text>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				title: 'Hello',
				username: "",
				password: "",
				token: ""
			}
		},
		onLoad() {

		},
		methods: {
			req(action,params){
				return new Promise((resolve,reject)=>{
					uniCloud.callFunction({
						name:'user-center',
						data:{
							action,
							params
						},
						success:res=>{
							resolve(res.result);
						},
						fail:res=>{
							reject(res.result);
						}
					})
				})
			},
			register(){
				this.req("register",{username:this.username,password:this.password}).then(res=>{
					console.log(res);
					uni.setStorageSync('uni_id_token',res.token);
					uni.setStorageSync('uni_id_token_expired',res.tokenExpired);
					this.token = res.token;
				})
			},
			login(){
				this.req("login",{username:this.username,password:this.password}).then(res=>{
					console.log(res);
					uni.setStorageSync('uni_id_token',res.token);
					uni.setStorageSync('uni_id_token_expired',res.tokenExpired);
					this.token = res.token;
				})
			},
			logout(){
				this.req("logout",{}).then(res=>{
					console.log(res);
					this.token = "";
				})
			}
		}
	}
</script>

<style>
	.content {
		display: flex;
		flex-direction: column;
		align-items: center;
		justify-content: center;
	}

	.logo {
		height: 200rpx;
		width: 200rpx;
		margin-top: 200rpx;
		margin-left: auto;
		margin-right: auto;
		margin-bottom: 50rpx;
	}

	.text-area {
		display: flex;
		justify-content: center;
	}

	.title {
		font-size: 36rpx;
		color: #8f8f94;
	}
</style>

封装请求

req(action, params) {
	return new Promise((resolve, reject) => {
		uniCloud.callFunction({
			name: 'user-center',
			data: {
				action,
				params
			},
			success: res => {
				resolve(res.result)
			},
			fail: res => {
				reject(res.result)
			}
		})
	})
}

由于本次只用了user-center云函数 所以name属性我固定了

登录

传参为用户名密码
登录成功将token保存为uni_id_token
则请求时会默认携带

login() {
	this.req("login", {
		username: this.username,
		password: this.password
	}).then(res => {
		console.log(res);
		uni.setStorageSync('uni_id_token', res.token);
		uni.setStorageSync('uni_id_token_expired', res.tokenExpired);
		this.token = res.token;
	})
}

注册

传参为用户名密码
注册成功会默认登录

register() {
	this.req("register", {
		username: this.username,
		password: this.password
	}).then(res => {
		console.log(res);
		uni.setStorageSync('uni_id_token', res.token);
		uni.setStorageSync('uni_id_token_expired', res.tokenExpired);
		this.token = res.token;
	})
}

退出

传参为uni_id_token

logout() {
	this.req("logout", {}).then(res => {
		console.log(res);
		this.token = "";
	})
}

结语

这里并没有处理错误情况
code为0为请求成功你学会了吗~