这篇文章主要介绍了微信小程序怎么实现竖排slider效果的相关知识，内容详细易懂，操作简单快捷，具有一定借鉴价值，相信大家阅读完这篇微信小程序怎么实现竖排slider效果文章都会有所收获，下面我们一起来看看吧。
js：
Component({ properties: { blockColor: { type: String, value: "#ffffff" }, blockSize: { type: Number, value: 28 }, backgroundColor: { type: String, value: "#e9e9e9" }, activeColor: { type: String, value: "#1aad19" }, step: { type: Number, value: 1 }, min: { type: Number, value: 0 }, max: { type: Number, value: 100 }, value: { type: Number, value: 0 }, disabled: { type: Boolean, value: false }, showValue: { type: Boolean, value: false }, }, observers: { 'blockSize': function(blockSize) { if (blockSize > 28) { this.setData({ blockSize: 28 }) } else if (blockSize < 12) { this.setData({ blockSize: 12 }) } }, 'showValue': function(){ this.queryHeight() // 由于显示数字后，滑动区域变化，需要重新查询可滑动高度 } }, data: { totalTop: null, totalHeight: null, currentValue: 0, }, methods: { setCurrent: function(e){ this.setData({ currentValue: e.value }) }, queryHeight: function(){ wx.createSelectorQuery().in(this).select('.slider-container').boundingClientRect((res) => { this.setData({ totalTop: res.top, totalHeight: res.height }) }).exec() }, empty: function(){}, }})json：
{ "component": true, "usingComponents": {}}wxml：
<wxs module="eventHandle" src="./SliderVertical.wxs"></wxs><view class="slider" catchtouchmove="empty"> <view class="slider-append" data-percent="0" bindtap="{{eventHandle.tapEndPoint}}"></view> <view class="slider-container" change:prop="{{eventHandle.propsChange}}" prop="{{ {max,min,step,value,totalTop,totalHeight,disabled} }}" > <view class="slider-lower" id="lower" catchtap="{{eventHandle.tap}}"> <view class="slider-lower-line" ></view> </view> <view class="slider-middle"> <view class="slider-block" catchtouchstart="{{eventHandle.start}}" catchtouchmove="{{eventHandle.move}}" catchtouchend="{{eventHandle.end}}" ></view> </view> <view class="slider-upper" id="upper" catchtap="{{eventHandle.tap}}"> <view class="slider-upper-line" ></view> </view> </view> <view class="slider-append" data-percent="1" bindtap="{{eventHandle.tapEndPoint}}"></view> <view class="slider-value" wx:if="{{showValue}}">{{currentValue}}</view></view>wxs:
var notInt = function(num) { return num !== parseInt(num)}var calculate = function(instance,state,changeCallback){ var max = state.max var min = state.min var offset = state.offset var step = state.step // 1、计算 offset 按照 step 算应该是几个。 // Math.round(offset % step / step) 计算的是 offset 对 step 取模后剩下的长度四舍五入，就是多出来的部分是否该算一步 // Math.floor(offset / step) 计算的是 offset 中包含多少个完整的 step var stepNum = Math.round(offset % step / step) + Math.floor(offset / step) // 2、纠正后的当前高度 var current = stepNum * step // 3、当前高度所占比例，由于 offset 的大小已经在进方法前经过了修正，所以这里不需要再判断是否小于0或者大于100了 var percent = current * 100 / (max - min) instance.selectComponent("#upper").setStyle({ height: (100 - percent) + "%" }) instance.selectComponent("#lower").setStyle({ height: percent + "%" }) if(state.current !== current){ state.current = current changeCallback(current+min) }}module.exports = { propsChange: function(newValue, oldValue, ins) { var state = ins.getState() var step = newValue.step; var min = newValue.min; var max = newValue.max; var value = newValue.value; if (notInt(step) || notInt(min) || notInt(max) || notInt(value)) { console.log("你不把 step min max value 设成正整数，我没法做啊") return } if (min > max) { min = oldValue.min max = oldValue.max } if (value > max) { console.log("value的值比max大，将value强制设为max") value = max } else if (value < min) { console.log("value的值比min小，将value强制设为min："+min) value = min } if (step <= 0 || (max - min) % step != 0) { console.log("step只能是正整数且必须被(max-min)整除，否则将step强制设为1") step = 1 } state.min = min state.max = max state.step = step state.offset = value - min state.disabled = newValue.disabled state.totalTop = newValue.totalTop state.totalHeight = newValue.totalHeight if (newValue.totalTop !== null && newValue.totalHeight !== null) { calculate(ins, state, function(currentValue){ ins.callMethod("setCurrent", {value: state.current + state.min}) }) } }, tapEndPoint: function(e, ins){ var state = ins.getState() if (state.disabled) return var percent = e.currentTarget.dataset.percent state.offset = (state.max - state.min) * percent calculate(ins, state, function (currentValue) { ins.triggerEvent("change", { value: currentValue }) ins.callMethod("setCurrent", {value: currentValue}) }) }, tap: function(e, ins) { var state = ins.getState() if (state.disabled) return // （总高度+头部高度-点击点高度）/ 总高度 = 点击点在组件的位置 // 点击事件只在线条上，所以percent是不可能小于0，也不可能超过100%，无需另加判断 var percent = ( e.changedTouches[0].pageY - state.totalTop) / state.totalHeight state.offset = (state.max - state.min) * percent calculate(ins, state, function(currentValue){ ins.triggerEvent("change", { value: currentValue }) ins.callMethod("setCurrent", {value: currentValue}) }) }, start: function(e, ins) { var state = ins.getState() if (state.disabled) return state.startPoint = e.changedTouches[0] // 本次滑动之前的高度px = 当前高度value / (最大值-最小值) * 最大高度 var currentPx = state.current / (state.max - state.min) * state.totalHeight state.currentPx = currentPx }, move: function(e, ins) { var state = ins.getState() if (state.disabled) return var startPoint = state.startPoint var endPoint = e.changedTouches[0] // 当前的高度px = 滑动之前的高度px + 起始点高度 - 当前点高度 var currentPx = state.currentPx + endPoint.pageY - startPoint.pageY var percent = currentPx / state.totalHeight // 由于可能滑出slider范围，所以要限制比例在 0-1之间 percent = percent>1?1:percent percent = percent<0?0:percent state.offset = (state.max - state.min) * percent calculate(ins, state, function(currentValue){ ins.triggerEvent("changing", { value: currentValue }) ins.callMethod("setCurrent", {value: currentValue}) }) }, end: function(e, ins) { var state = ins.getState() if (state.disabled) return ins.triggerEvent("change", { value: state.current + state.min }) }}wxss:
.slider { height: 100%; padding: 30rpx 0; box-sizing: border-box; display: flex; flex-direction: column; align-items: center; justify-content: space-around;}.slider-container { flex: 1; margin: 0 20px; width: 0; display: flex; flex-direction: column; align-items: center;}.slider-upper { flex-shrink: 0; height: 100%;}.slider-lower { flex-shrink: 0; height: 0%;}.slider-upper-line { height: 100%; margin: 0 12px; width: 2px;}.slider-lower-line { height: 100%; margin: 0 12px; width: 2px;}.slider-middle { flex-shrink: 0; width: 0; height: 0; display: flex; align-items: center; justify-content: center;}.slider-block { flex-shrink: 0; width: 20rpx; height: 20rpx; border-radius: 50%; position: relative; z-index: 1;}.slider-value { flex-shrink: 0; pointer-events: none;}.slider-append { flex-shrink: 0; height: 10px; padding: 0 20px;}保存到组件
index部分
js`：
Page({ slider1change: function (e) { console.log("change：",e) }, slider1changing: function (e) { console.log("changing：",e) },})wxml：
<view > <slider-vertical block-color="#ffffff" block-size="28" backgroundColor="#e9e9e9" activeColor="#1aad19" bindchange="slider1change" bindchanging="slider1changing" step="1" min="0" max="200" value="0" disabled="{{false}}" show-value="{{true}}" ></slider-vertical> <slider-vertical block-color="#ffffff" block-size="28" backgroundColor="#e9e9e9" activeColor="#1aad19" bindchange="slider1change" bindchanging="slider1changing" step="5" min="50" max="200" value="115" disabled="{{false}}" show-value="{{false}}" ></slider-vertical></view>关于“微信小程序怎么实现竖排slider效果”这篇文章的内容就介绍到这里，感谢各位的阅读！相信大家对“微信小程序怎么实现竖排slider效果”知识都有一定的了解，大家如果还想学习更多知识，欢迎关注编程网行业资讯频道。
