微信小程序教程之wxapp視圖容器 scroll-view

原創

2020-02-22 07:12

scroll-view

可滾動視圖區域。

屬性名	類型	默認值	說明
scroll-x	Boolean	false	允許橫向滾動
scroll-y	Boolean	false	允許縱向滾動
upper-threshold	Number	50	距頂部/左邊多遠時（單位px），觸發 scrolltoupper 事件
lower-threshold	Number	50	距底部/右邊多遠時（單位px），觸發 scrolltolower 事件
scroll-top	Number		設置豎向滾動條位置
scroll-left	Number		設置橫向滾動條位置
scroll-into-view	String		值應爲某子元素id，則滾動到該元素，元素頂部對齊滾動區域頂部
bindscrolltoupper	EventHandle		滾動到頂部/左邊，會觸發 scrolltoupper 事件
bindscrolltolower	EventHandle		滾動到底部/右邊，會觸發 scrolltolower 事件
bindscroll	EventHandle		滾動時觸發，event.detail = {scrollLeft, scrollTop, scrollHeight, scrollWidth, deltaX, deltaY}

使用豎向滾動時，需要給<scroll-view/>一個固定高度，通過 WXSS 設置 height。

示例代碼：

<view class="section">
 <view class="section__title">vertical scroll</view>
 <scroll-view scroll-y="true" style="height: 200px;" bindscrolltoupper="upper" bindscrolltolower="lower" bindscroll="scroll" scroll-into-view="{{toView}}" scroll-top="{{scrollTop}}">
 <view id="green" class="scroll-view-item bc_green"></view>
 <view id="red" class="scroll-view-item bc_red"></view>
 <view id="yellow" class="scroll-view-item bc_yellow"></view>
 <view id="blue" class="scroll-view-item bc_blue"></view>
 </scroll-view>

 <view class="btn-area">
 <button size="mini" bindtap="tap">click me to scroll into view </button>
 <button size="mini" bindtap="tapMove">click me to scroll</button>
 </view>
</view>
<view class="section section_gap">
 <view class="section__title">horizontal scroll</view>
 <scroll-view class="scroll-view_H" scroll-x="true" style="width: 100%">
 <view id="green" class="scroll-view-item_H bc_green"></view>
 <view id="red" class="scroll-view-item_H bc_red"></view>
 <view id="yellow" class="scroll-view-item_H bc_yellow"></view>
 <view id="blue" class="scroll-view-item_H bc_blue"></view>
 </scroll-view>
</view>

var order = ['red', 'yellow', 'blue', 'green', 'red']
Page({
 data: {
 toView: 'red',
 scrollTop: 100
 },
 upper: function(e) {
 console.log(e)
 },
 lower: function(e) {
 console.log(e)
 },
 scroll: function(e) {
 console.log(e)
 },
 tap: function(e) {
 for (var i = 0; i < order.length; ++i) {
  if (order[i] === this.data.toView) {
  this.setData({
   toView: order[i + 1]
  })
  break
  }
 }
 },
 tapMove: function(e) {
 this.setData({
  scrollTop: this.data.scrollTop + 10
 })
 }
})
scroll-view