radio點(diǎn)擊當(dāng)前選項(xiàng)，取消選擇，在網(wǎng)上嘗試找了很多方法都不生效，通過(guò)給radio綁定一個(gè)點(diǎn)擊事件（bindtap）來(lái)實(shí)現(xiàn)這一功能，直接看代碼：

index.wxml：

1. <view class="page">
2. <view class="page__hd">
3. <text class="page__title">radio</text>
4. <text class="page__desc">單選框</text>
5. </view>
6. <view class="page__bd">
7. <view class="section section_gap">
8. <radio-group class="radio-group" bindchange="radioChange">
9. <radio class="radio" bindtap = "bindtap1" wx:for-items="{{items}}" wx:key="name" value="{{item.name}}" checked = "{{item.checked}}">
10. <text>{{item.value}}</text>
11. </radio>
12. </radio-group>
13. </view>
14. </view>
15. </view>

index.wss:

1. .radio-group {
2. border-bottom: 1px solid #ddd;
3. }
4. .radio {
5. display: block;
6. border-top: 1px solid #ddd;
7. padding: 5px;
8. }

index.js:

1. Page({
2. data: {
3. items: [
4. { name: 'USA', value: '美國(guó)', checked:false},
5. { name: 'CHN', value: '美國(guó)', checked: true },
6. { name: 'BRA', value: '巴西', checked: false},
7. { name: 'JPN', value: '日本', checked: false},
8. { name: 'ENG', value: '英國(guó)', checked: false},
9. { name: 'FRA', value: '法國(guó)', checked: false},
10. ],
11. aa:'CHN'
12. },
13.  
14. bindtap1:function(e){
15. var items = this.data.items;
16. for (var i = 0; i < items.length; i++){
17. if (items[i].name == this.data.aa){
18. for (var j = 0; j < items.length; j++) {
19. // console.log("items[j].checked = ", items[j].checked);
20. if (items[j].checked && j != i) {
21. items[j].checked = false;
22. }
23. }
24. items[i].checked = !(items[i].checked);
25. console.log("-----:" ,items);
26. // this.setData(this.data.items[i]);
27.  
28. }
29. }
30. this.setData({
31. items: items
32. });
33. },
34.  
35. radioChange: function (e) {
36. // for(var i = 0;i<this.data.items.length;i++){
37. // if (this.data.items[i].checked){
38. // // console.log('radio發(fā)生change事件，攜帶value值為：', this.data.items[i].name)
39. // }
40. // }
41. this.data.aa = e.detail.value;
42. console.log(this.data.aa);
43. }
44. })

通過(guò)這樣就可以實(shí)現(xiàn)radio的再次點(diǎn)擊取消掉選擇。