#菜鸟提问，请问按钮加减怎么才能同步？

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#菜鸟提问，请问按钮加减怎么才能同步？#Rookie asks, how can the button addition and subtraction be synchronized?

I make a button to add or subtract a data item in the database. However, because it is written in input and pressed the subtract button, the data will appear in input. At this time, the data has been subtracted by 1. The data displayed in input is still the data just taken from the database. If I press the Add button at this time, the data displayed in input is the data subtracted by 1 just now, and the operation code has been pasted downstairs

回答：

onNumberDec: function() {  console.log('减');  var newNumber = this.data.data[0].number --;  this.setData({    number:newNumber  });  if(newNumber == 1)  {    wx.showToast({title:'最后一次',  icon:'none'})  }  console.log(this.data.data[0].number);},//按钮加法运算onNumberInc:function() {  console.log('加');  if(this.data.data[0].number == 0)  {    this.data.data[0].number++  }  var newNumber = this.data.data[0].number++;    this.setData({    number:newNumber  });  console.log(this.data.data[0].number);}