微信小程序 label 组件详解及简单实例

<view class="section section_gap"><view class="section__title">表单组件在label内</view><checkbox-group class="group" bindchange="checkboxChange"> <view class="label-1" wx:for-items="{{checkboxItems}}"> <label>  <checkbox hidden value="{{item.name}}" checked="{{item.checked}}"></checkbox>  <view class="label-1__icon">  <view class="label-1__icon-checked" style="opacity:{{item.checked ? 1: 0}}"></view>  </view>  <text class="label-1__text">{{item.value}}</text> </label> </view></checkbox-group></view><view class="section section_gap"><view class="section__title">label用for标识表单组件</view><radio-group class="group" bindchange="radioChange"> <view class="label-2" wx:for-items="{{radioItems}}"> <radio id="{{item.name}}" hidden value="{{item.name}}" checked="{{item.checked}}"></radio> <view class="label-2__icon">  <view class="label-2__icon-checked" style="opacity:{{item.checked ? 1: 0}}"></view> </view> <label class="label-2__text" for="{{item.name}}"><text>{{item.name}}</text></label> </view></radio-group></view><view class="section section_gap"><view class="section__title">绑定button</view><label class="label-3"> <text>点击这段文字，button会被选中</text></label><view class="btn-area"> <button type="default" name="1" bindtap="tapEvent">按钮</button></view></view><view class="section section_gap"><view class="section__title">label内有多个时选中第一个</view><label class="label-4"> <checkbox> 选中我 </checkbox> <checkbox> 选不中 </checkbox> <checkbox> 选不中 </checkbox> <checkbox> 选不中 </checkbox> <view class="label-4_text">点我会选中第一个</view></label></view>

Page({ data: { checkboxItems: [ {name: 'USA', value: '美国'}, {name: 'CHN', value: '中国', checked: 'true'}, {name: 'BRA', value: '巴西'}, {name: 'JPN', value: '日本', checked: 'true'}, {name: 'ENG', value: '英国'}, {name: 'TUR', value: '法国'}, ], radioItems: [ {name: 'USA', value: '美国'}, {name: 'CHN', value: '中国', checked: 'true'}, {name: 'BRA', value: '巴西'}, {name: 'JPN', value: '日本'}, {name: 'ENG', value: '英国'}, {name: 'TUR', value: '法国'}, ], hidden: false }, checkboxChange: function(e) { var checked = e.detail.value var changed = {} for (var i = 0; i < this.data.checkboxItems.length; i ++) { if (checked.indexOf(this.data.checkboxItems[i].name) !== -1) { changed['checkboxItems['+i+'].checked'] = true } else { changed['checkboxItems['+i+'].checked'] = false } } this.setData(changed) }, radioChange: function(e) { var checked = e.detail.value var changed = {} for (var i = 0; i < this.data.radioItems.length; i ++) { if (checked.indexOf(this.data.radioItems[i].name) !== -1) { changed['radioItems['+i+'].checked'] = true } else { changed['radioItems['+i+'].checked'] = false } } this.setData(changed) }})

.label-1, .label-2{ margin-bottom: 15px;}.label-1__text, .label-2__text { display: inline-block; vertical-align: middle;}.label-1__icon { position: relative; margin-right: 10px; display: inline-block; vertical-align: middle; width: 18px; height: 18px; background: #fcfff4;}.label-1__icon-checked { position: absolute; top: 3px; left: 3px; width: 12px; height: 12px; background: #1aad19;}.label-2__icon { position: relative; display: inline-block; vertical-align: middle; margin-right: 10px; width: 18px; height: 18px; background: #fcfff4; border-radius: 50px;}.label-2__icon-checked { position: absolute; left: 3px; top: 3px; width: 12px; height: 12px; background: #1aad19; border-radius: 50%;}.label-4_text{ text-align: center; margin-top: 15px;}