微信小程序实现登录页面

<view class="modal-mask" bindtap="hideModal" catchtouchmove="preventTouchMove" wx:if="{{!hiddenmodalput}}"></view>
<view class="modal-dialog" wx:if="{{!hiddenmodalput}}" catchtouchmove="preventTouchMove">
  <view class="modal-title">{{tip}}</view>
  <view class="modal-content">
    <view class="modal-input">
      <input placeholder-class="input-holder" type="text" maxlength="20" bindinput="inputUsername" class="input" placeholder="用户名" value="{{username}}">
      </input>
    </view>
    <view class="modal-input">
      <input placeholder-class="input-holder" type="text" maxlength="20" bindinput="inputPassword" class="input" placeholder="密码" value="{{password}}">
      </input>
    </view>
  </view>
  <view class="modal-footer">
    <navigator class="btn-cancel" target="miniProgram" open-type="exit">
      退出
    </navigator>
    <!-- <view class="btn-cancel" bindtap="cancel" data-status="cancel">取消</view> -->
    <view class="btn-confirm" bindtap="confirm" data-status="confirm">确定</view>
  </view>
</view>

  /**
   * 生命周期函数--监听页面加载
   */
  onLoad: function (options) {
    let that = this;
    wx.getStorage({
      key: 'username',
      success (res) {
        console.log(res.data);
        that.setData({
          hiddenmodalput:true,
        })
      },
      fail (res) {
        console.log(res);
        that.setData({
          hiddenmodalput:false,
        })
        wx.hideTabBar({
          animation: true,
          success: (res) => {},
          fail: (res) => {},
          complete: (res) => {},
        })
      }
    })
  },