改成这样试试？
speak2: function(e) {
        var t = this, a = t.data.value;
        wx.cloud.init()
        var that = this;
        wx.cloud.callFunction({
        name: 'user',
        data: {
          msg: a
        },
        success(res) {
          if (res.result.errCode == 87014) {
            console.log(res.result.errCode)
            wx.showToast({
              icon: 'none',
              title: '文字违规',
            })
          } else {
            that.setData({
              remark: a,
              disableFlag: false
            });
          }
        }
      });