小程序request接口的封裝(本質上是對request回調函數再次回調)

1. module.exports.getData = function (url) {
2. var data = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
3. var method = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 'POST';
4. var header = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : { 'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8' };
5.  
6. return new Promise(function (resolve, reject) {
7. wx.request({
8. url: url,
9. data: data,
10. method: method,
11. header: { 'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8' },
12. success: function (res) {
13. resolve(res)
14. },
15. fail: function (res) {
16. reject(res)
17. }
18. })
19. })
20. }

調用方法

1. var common = require("../../common/common.js")
2. common.getData(postUrl)
3. .then(function(data){
4. this.setData({
5. //....
6. });
7. console.log(data);
8. });

二：實現給循環列表添加點擊樣式

微信小程序有個屬性hover-class=’active’,是指當點擊列表元素時當按下鼠標左鍵會顯示active樣式,但是鼠標離開樣式就會復原.可以參考以下解決方案,直接上代碼:  wxml:

1. <view class="tags">
2. <view class="tag-title">標簽</view>
3. <view class="tag-box">
4. <view wx:for="{{tags}}" wx:key="id" wx:for-index="i">
5. <view class="tags-item {{currentItem==item.id?'active-tag':''}}" data-id="{{item.id}}" bindtap="tagChoose">{{item.name}}</view>
6. </view>
7. </view>
8. </view>

js文件:

1. tagChoose:function(options){
2. var that = this
3. var id = options.currentTarget.dataset.id;
4. console.log(id)
5. //設置當前樣式
6. that.setData({
7. 'currentItem':id
8. })
9.  
10.  
11. }

核心點:class=”tags-item {{dateCurrent==item.id?’active-tag’:”}}”模板文件中使用三元運算符,通過dateCurrent指定當前item的id