WeChat Mini Program Mall Project Shopping Quantity Addition and Subtraction-Mini Program Development-php.cn

This article mainly introduces the function of adding and subtracting the shopping quantity in the WeChat mini program mall in detail. It has a certain reference value. Interested friends can refer to it

When we buy the baby, The quantity of shopping is often what we need to use, as shown below:
In the baby details page:

##In the shopping cart:

Now I will introduce this small component to you. How to write it in the small program

The picture below is the picture of this project:

wxml：

   -    +

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wxss：

/*全局样式*/ page { padding: 20px 0; } /*主容器*/ .stepper { width: 80px; height: 26px; /*给主容器设一个边框*/ border: 1px solid #ccc; border-radius: 3px; margin:0 auto; } /*加号和减号*/ .stepper text { width: 19px; line-height: 26px; text-align: center; float: left; } /*数值*/ .stepper input { width: 40px; height: 26px; float: left; margin: 0 auto; text-align: center; font-size: 12px; /*给中间的input设置左右边框即可*/ border-left: 1px solid #ccc; border-right: 1px solid #ccc; } /*普通样式*/ .stepper .normal{ color: black; } /*禁用样式*/ .stepper .disabled{ color: #ccc; }

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js：

Page({ data: { // input默认是1 num: 1, // 使用data数据对象设置样式名 minusStatus: 'disabled' }, /* 点击减号 */ bindMinus: function() { var num = this.data.num; // 如果大于1时，才可以减 if (num > 1) { num --; } // 只有大于一件的时候，才能normal状态，否则disable状态 var minusStatus = num <= 1 ? 'disabled' : 'normal'; // 将数值与状态写回 this.setData({ num: num, minusStatus: minusStatus }); }, /* 点击加号 */ bindPlus: function() { var num = this.data.num; // 不作过多考虑自增1 num ++; // 只有大于一件的时候，才能normal状态，否则disable状态 var minusStatus = num < 1 ? 'disabled' : 'normal'; // 将数值与状态写回 this.setData({ num: num, minusStatus: minusStatus }); }, /* 输入框事件 */ bindManual: function(e) { var num = e.detail.value; // 将数值与状态写回 this.setData({ num: num }); } })

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Run result:

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