refactor(student): 完善学生端登录功能

- 清空默认用户名和密码
- 添加登录表单验证
- 增加登录类型选择提示
- 上线前保留测试账号密码（需删除）

pages/student/login/login.vue

@@ -65,8 +65,8 @@ export default {
   data() {
     return {
       password: true,
-      user: '15374889135', //账户
+      user: '', //账户
-      password1: '15374889135', //密码
+      password1: '', //密码
 
       loginType:'',//登陆类型|1=教练,2=销售,3=学员
       loginType_str:'',//登陆类型中文名字
@@ -108,6 +108,30 @@ export default {
     },
     //登陆
     async login() {
+
+      if (!this.user) {
+        uni.showToast({
+          title: '请输入用户名',
+          icon: 'none'
+        })
+        return
+      }
+      if (!this.password1) {
+        uni.showToast({
+          title: '请输入密码',
+          icon: 'none'
+        })
+        return
+      }
+
+      if (!this.loginType) {
+        uni.showToast({
+          title: '请选择登陆类型',
+          icon: 'none'
+        })
+        return
+      }
+
       let item = {};
       item['username'] = this.user
       item['password'] = this.password1
@@ -203,6 +227,22 @@ export default {
       this.loginType = e.value
       this.loginType_str = e.text
       this.picker_show_loginType = false
+
+      //@todo 上线时请删除这个判断
+      if(this.loginType == 1){
+        //教师端
+        this.user= '15374889135' //账户
+        this.password1= '15374889135' //密码
+      }else if(this.loginType == 2){
+        //销售端
+        this.user= '15148228108' //账户
+        this.password1= '123123' //密码
+      }else{
+        //学生端
+        this.user= '' //账户
+        this.password1= '' //密码
+      }
+
     },
   }
 }