「小程序JAVA實戰(zhàn)」小程序的組件（23）

開始了解下小程序的組件。源碼：https://github.com/limingios/wxProgram.git 中的No.10

組件

• 多個組件構(gòu)成一張視圖頁面
  >經(jīng)過樣式和布局，頁面其實理解成html

• 組件包含<開始標(biāo)簽></結(jié)束標(biāo)簽>

  
  

• 每個組件都包含一些公用屬性

  
  

• 官方的闡述

  https://developers.weixin.qq.com/miniprogram/dev/component/

view視圖組件

• view 組件
  >用的最多的，也是之前的樣例也講過。https://developers.weixin.qq.com/miniprogram/dev/component/view.html

• 演示用例

<!--view.wxml-->

<!--手機按住1秒變成灰色，手指松開后2秒變回原來的紅色-->
<view?class="container"?hover-class='hover-class'?hover-start-time="10000"?hover-stay-time="2000">
</view>

.container{
??background-color:?red;
}

.hover-class{
??background-color:?gray;
}

scroll-view 視圖組件

• 官網(wǎng)的介紹
  >https://developers.weixin.qq.com/miniprogram/dev/component/scroll-view.html

• 演示

<!--scroll-view.wxml-->
<scroll-view?class="container-wrapp"?style='height:300rpx'?scroll-y='true'
bindscrolltoupper="scrolltoupper"
bindscrolltolower="scrolltolower"
upper-threshold="0"
lower-threshold="0"
scroll-top="100"
enable-back-to-top="true"
scroll-with-animation="true"
bindscroll="scroll"
scroll-into-view="b"
>
??<view?id="a"?class='sizeY?a'>a</view>
??<view?id="b"?class='sizeY?b'>b</view>
??<view?id="c"?class='sizeY?c'>c</view>
??<view?id="d"?class='sizeY?d'>d</view>
??<view?id="e"?class='sizeY?e'>e</view>
</scroll-view>


<scroll-view?class="container-nowrap"?style='margin-top:250rpx'?scroll-x='true'?scroll-left="200">
??<view?id="a"?class='sizeX?a'>a</view>
??<view?id="b"?class='sizeX?b'>b</view>
??<view?id="c"?class='sizeX?c'>c</view>
??<view?id="d"?class='sizeX?d'>d</view>
??<view?id="e"?class='sizeX?e'>e</view>
</scroll-view>

//scroll-view.js
//獲取應(yīng)用實例

Page({
??scrolltoupper:function(){
??????console.log("滾動到頂部");
??},
??scrolltolower:function(){
??????console.log("滾動到底部");
??},
??scroll:function(){
????console.log("滾動中。。。");
??}

})

.container-wrap{
??display:?flex;
??flex-wrap:wrap;
}

.container-nowrap{
??display:flex;
??white-space:?nowrap;
}

.sizeY{
??width:?100%;
??height:?150rpx;
}

.sizeX{
??width:?250rpx;
??height:?150px;
??display:?inline-block;
}
.a?{
??background:?red;
}
.b?{
??background:?yellow;
}

.c?{
??background:?blue;
}

.d?{
??background:?green;
}

.e?{
??background:?gold;
}

注意：enable-back-to-top=”true” 在開發(fā)工具沒辦法演示只能在手機上才能演示出來點擊直接到達頂部的效果。關(guān)于scrollview 只有橫向和縱向，其實這塊還是比較重要的多加練習(xí)吧。

swiper組件

• 俗稱 輪播圖

• 官方介紹
  >https://developers.weixin.qq.com/miniprogram/dev/component/swiper.html

• 演示

<!--swiper.wxml-->
<swiper?indicator-dots="{{indicatorDots}}"
??autoplay="{{autoplay}}"?interval="{{interval}}"?duration="{{duration}}">
??<block?wx:for="{{imgUrls}}">
????<swiper-item>
??????<image?src="{{item}}"?class="slide-image"?width="355"?height="150"/>
????</swiper-item>
??</block>
</swiper>
<button?bindtap="changeIndicatorDots">?indicator-dots?</button>
<button?bindtap="changeAutoplay">?autoplay?</button>
<slider?bindchange="intervalChange"?show-value?min="500"?max="2000"/>?interval
<slider?bindchange="durationChange"?show-value?min="1000"?max="10000"/>?duration

//swiper.js
//獲取應(yīng)用實例

Page({
??data:?{
????imgUrls:?[
??????'http://img02.tooopen.com/images/20150928/tooopen_sy_143912755726.jpg',
??????'http://img06.tooopen.com/images/20160818/tooopen_sy_175866434296.jpg',
??????'http://img06.tooopen.com/images/20160818/tooopen_sy_175833047715.jpg'
????],
????indicatorDots:?false,
????autoplay:?false,
????interval:?5000,
????duration:?1000
??},
??changeIndicatorDots:?function?(e)?{
????this.setData({
??????indicatorDots:?!this.data.indicatorDots
????})
??},
??changeAutoplay:?function?(e)?{
????this.setData({
??????autoplay:?!this.data.autoplay
????})
??},
??intervalChange:?function?(e)?{
????this.setData({
??????interval:?e.detail.value
????})
??},
??durationChange:?function?(e)?{
????this.setData({
??????duration:?e.detail.value
????})
??}
})

• 演示

<!--movable.wxml-->

<movable-area?class="container">
??<movable-view?class='size'?direction='all'?inertia='true'?out-of-bounds='true'?x='50'?y='50'
??damping='100'?friction='100'?bindchange='onchange'?bindscale='onscale'?scale="true">
??</movable-view>
</movable-area>

.container{
??background-color:?red;
??width:?100%;
??height:?650rpx;
}

.size{
??background-color:?yellow;
??width:?300rpx;
??height:?250rpx;
}

//movable.js
//獲取應(yīng)用實例

Page({
??onchange:function(){
????console.log("在移動。。");
??},
??onscale:function(){
????console.log("在縮放")
??}
})

PS：跟老鐵一起過了一遍wx小程序關(guān)于視圖的api，感覺還是組件很豐富，很好用！