「小程序JAVA实战」小程序 loading 提示框与页面跳转（37）

转自：https://idig8.com/2018/09/02/xiaochengxujavashizhanxiaochengxu-loading-tishikuangyuyemiantiaozhuan37/

登录注册都完成了，有可能会遇到一些问题，服务器繁忙的话，后台接口卡主了，也没任何提示，小程序端的用户比较暴力一直惦记怎么办。

加载提示框，隐藏加载中提示框，页面跳转

https://developers.weixin.qq.com/miniprogram/dev/api/api-react.html#wxshowtoastobject
https://developers.weixin.qq.com/miniprogram/dev/api/api-react.html#wxhideloading

跳转实例

• 用户登录

• 用户注册

const app = getApp()

Page({
  data: {

  },

  doLogin: function (e) {
    var formObject = e.detail.value;
    var username = formObject.username;
    var password = formObject.password;

    // 简单验证
    if (username.length == 0 || password.length == 0) {
      wx.showToast({
        title: '用户名或密码不能为空',
        icon: 'none',
        duration: 3000
      })
    } else {
      wx.showLoading({
        title: '正在加载中。。。'
      });
      wx.request({
        url: app.serverUrl + "/login",
        method: "POST",
        data: {
          username: username,
          password: password
        },
        header: {
          'content-type': 'application/json' // 默认值
        },
        success: function (res) {
          console.log(res.data);
          var status = res.data.status;
          wx.hideLoading();
          if (status == 200) {
            wx.showToast({
              title: "用户登陆成功~！",
              icon: 'none',
              duration: 3000
            })
            app.userinfo = res.data.data;
          } else if (status == 500) {
            wx.showToast({
              title: res.data.msg,
              icon: 'none',
              duration: 3000
            })
          }
        }
      })
    }
  },
  goLoginPage: function (e) {
    console.log("跳转到注册");
  }
})

• 用户注册

const app = getApp()

Page({
    data: {

    },

    doRegist: function(e) {
      var formObject = e.detail.value;
      var username = formObject.username;
      var password = formObject.password;

      // 简单验证
      if (username.length == 0 || password.length == 0) {
        wx.showToast({
          title: '用户名或密码不能为空',
          icon: 'none',
          duration: 3000
        })
      }else{
        wx.showLoading({
          title: '正在加载中。。。'
        });
        wx.request({
          url: app.serverUrl +"/regist",
          method:"POST",
          data: {
            username: username,
            password: password
          },
          header: {
            'content-type': 'application/json' // 默认值
          },
          success: function (res) {
            console.log(res.data);
            var status = res.data.status;
            wx.hideLoading();
            if(status == 200){
              wx.showToast({
                title: "用户注册成功~！",
                icon: 'none',
                duration: 3000
              })
              app.userinfo = res.data.data;
            }else if(status == 500){
              wx.showToast({
                title: res.data.msg,
                icon: 'none',
                duration: 3000
              })
            }
          }
        })
      }
    },
    goLoginPage:function(e){
      console.log("跳转到登录");
    }
})

• 用户登录跳转

const app = getApp()

Page({
  data: {

  },

  doLogin: function (e) {
    var formObject = e.detail.value;
    var username = formObject.username;
    var password = formObject.password;

    // 简单验证
    if (username.length == 0 || password.length == 0) {
      wx.showToast({
        title: '用户名或密码不能为空',
        icon: 'none',
        duration: 3000
      })
    } else {
      wx.showLoading({
        title: '正在加载中。。。'
      });
      wx.request({
        url: app.serverUrl + "/login",
        method: "POST",
        data: {
          username: username,
          password: password
        },
        header: {
          'content-type': 'application/json' // 默认值
        },
        success: function (res) {
          console.log(res.data);
          var status = res.data.status;
          wx.hideLoading();
          if (status == 200) {
            wx.showToast({
              title: "用户登陆成功~！",
              icon: 'none',
              duration: 3000
            })
            app.userinfo = res.data.data;
          } else if (status == 500) {
            wx.showToast({
              title: res.data.msg,
              icon: 'none',
              duration: 3000
            })
          }
        }
      })
    }
  },
  goRegisterPage: function (e) {
    wx.redirectTo({
      url: '../userRegister/userRegister',
    })
  }
})

• 用户注册跳转
  userRegister.js

const app = getApp()

Page({
    data: {

    },

    doRegist: function(e) {
      var formObject = e.detail.value;
      var username = formObject.username;
      var password = formObject.password;

      // 简单验证
      if (username.length == 0 || password.length == 0) {
        wx.showToast({
          title: '用户名或密码不能为空',
          icon: 'none',
          duration: 3000
        })
      }else{
        wx.showLoading({
          title: '正在加载中。。。'
        });
        wx.request({
          url: app.serverUrl +"/regist",
          method:"POST",
          data: {
            username: username,
            password: password
          },
          header: {
            'content-type': 'application/json' // 默认值
          },
          success: function (res) {
            console.log(res.data);
            var status = res.data.status;
            wx.hideLoading();
            if(status == 200){
              wx.showToast({
                title: "用户注册成功~！",
                icon: 'none',
                duration: 3000
              })
              app.userinfo = res.data.data;
            }else if(status == 500){
              wx.showToast({
                title: res.data.msg,
                icon: 'none',
                duration: 3000
              })
            }
          }
        })
      }
    },
    goLoginPage:function(e){
      wx.redirectTo({
        url: '../userLogin/userLogin',
      })
    }
})

PS：这次就是我们的跳转和loading的介绍。