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

WeChat Mini Program Mall Project Shopping Quantity Addition and Subtraction

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Release： 2018-06-23 16:49:01

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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：

<!-- 主容器 --> 
<view class="stepper"> 
  <!-- 减号 --> 
  <text class="{{minusStatus}}" bindtap="bindMinus">-</text> 
  <!-- 数值 --> 
  <input type="number" bindchange="bindManual" value="{{num}}" /> 
  <!-- 加号 --> 
  <text class="normal" bindtap="bindPlus">+</text> 
</view>

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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: &#39;disabled&#39; 
  }, 
  /* 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 ? &#39;disabled&#39; : &#39;normal&#39;; 
    // 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 ? &#39;disabled&#39; : &#39;normal&#39;; 
    // 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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