在预制体的脚本中已经设置了this，发现根本无法传递文件 声明的对象及数据。如下图
代码片段
//增加 每次1000
protected add_button(){
let that = this;
console.log(that.digital_card);
let that_money = 1000;
let the_money = that_money+1000;
console.log("增加",the_money);
that.digital_card.string = the_money.toString();
}
//减少 每次1000
protected red_button(){
let that = this;
console.log(that.digital_card);
let that_money = 1000;
let the_money = 0;
if(that_money<=0){
the_money = 0;
}else{
the_money = that_money-1000;
}
console.log('减少',the_money)
that.digital_card.string = the_money.toString();
}