uni-number-box.vue
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<template>
<view class="uni-numbox">
<view @click="_calcValue('minus')" class="uni-numbox__minus">
<text class="uni-numbox--text" :class="{ 'uni-numbox--disabled': inputValue <= min || disabled }">-</text>
</view>
<input :disabled="disabled" @blur="_onBlur" class="uni-numbox__value" type="number" v-model="inputValue" />
<view @click="_calcValue('plus')" class="uni-numbox__plus">
<text class="uni-numbox--text" :class="{ 'uni-numbox--disabled': inputValue >= max || disabled }">+</text>
</view>
</view>
</template>
<script>
/**
* NumberBox 数字输入框
* @description 带加减按钮的数字输入框
* @tutorial https://ext.dcloud.net.cn/plugin?id=31
* @property {Number} value 输入框当前值
* @property {Number} min 最小值
* @property {Number} max 最大值
* @property {Number} step 每次点击改变的间隔大小
* @property {Boolean} disabled = [true|false] 是否为禁用状态
* @event {Function} change 输入框值改变时触发的事件，参数为输入框当前的 value
*/
export default {
name: "UniNumberBox",
props: {
value: {
type: [Number, String],
default: 1
},
min: {
type: Number,
default: 0
},
max: {
type: Number,
default: 100
},
step: {
type: Number,
default: 1
},
disabled: {
type: Boolean,
default: false
}
},
data() {
return {
inputValue: 0
};
},
watch: {
value(val) {
this.inputValue = +val;
},
inputValue(newVal, oldVal) {
if (+newVal !== +oldVal) {
this.$emit("change", newVal);
}
}
},
created() {
this.inputValue = +this.value;
},
methods: {
_calcValue(type) {
if (this.disabled) {
return;
}
const scale = this._getDecimalScale();
let value = this.inputValue * scale;
let step = this.step * scale;
if (type === "minus") {
value -= step;
if (value < (this.min * scale)) {
return;
}
if (value > (this.max * scale)) {
value = this.max * scale
}
} else if (type === "plus") {
value += step;
if (value > (this.max * scale)) {
return;
}
if (value < (this.min * scale)) {
value = this.min * scale
}
}
this.inputValue = String(value / scale);
},
_getDecimalScale() {
let scale = 1;
// 浮点型
if (~~this.step !== this.step) {
scale = Math.pow(10, (this.step + "").split(".")[1].length);
}
return scale;
},
_onBlur(event) {
let value = event.detail.value;
if (!value) {
// this.inputValue = 0;
return;
}
value = +value;
if (value > this.max) {
value = this.max;
} else if (value < this.min) {
value = this.min;
}
this.inputValue = value;
}
}
};
</script>
<style scoped>
/* #ifdef APP-NVUE */
/* #endif */
.uni-numbox {
/* #ifndef APP-NVUE */
display: flex;
/* #endif */
flex-direction: row;
height: 35px;
line-height: 35px;
width: 120px;
}
.uni-numbox__value {
background-color: #ffffff;
width: 40px;
height: 35px;
text-align: center;
font-size: 16;
border-width: 1rpx;
border-style: solid;
border-color: #e5e5e5;
border-left-width: 0;
border-right-width: 0;
}
.uni-numbox__minus {
/* #ifndef APP-NVUE */
display: flex;
/* #endif */
flex-direction: row;
align-items: center;
justify-content: center;
width: 35px;
height: 35px;
/* line-height: $box-line-height;
*/
/* text-align: center;
*/
font-size: 20px;
color: #333;
background-color: #f8f8f8;
border-width: 1rpx;
border-style: solid;
border-color: #e5e5e5;
border-top-left-radius: 3px;
border-bottom-left-radius: 3px;
border-right-width: 0;
}
.uni-numbox__plus {
/* #ifndef APP-NVUE */
display: flex;
/* #endif */
flex-direction: row;
align-items: center;
justify-content: center;
width: 35px;
height: 35px;
border-width: 1rpx;
border-style: solid;
border-color: #e5e5e5;
border-top-right-radius: 3px;
border-bottom-right-radius: 3px;
background-color: #f8f8f8;
border-left-width: 0;
}
.uni-numbox--text {
font-size: 40rpx;
color: #333;
}
.uni-numbox--disabled {
color: #c0c0c0;
}
</style>