uniapp微信支付

1. buy(address,orderid){ 
2.                 if(!this.a_id){ 
3.                     this.util.showLoading("请选择地址"); 
4.                     return 
5.                 } 
6.               //微信支付 
7.                 uni.getProvider({ 
8.                     service: 'payment', 
9.                     success: res=>{ 
10.                         if (~res.provider.indexOf('wxpay')) { //先判断用户是否有微信支付环境（是否安装了微信app） 
11.                             uni.showLoading({title: '正在调起微信支付'}) 
12.                             let params={ 
13.                                 o_id:orderid, 
14.                                 a_id:address, 
15.                             } 
16.                             this.http.post("Wxpay/pay",params).then((res)=>{ 
17.                                 let resobj=res.data.data 
18.                                 let pages = getCurrentPages(); // 当前页面 
19.                                 let beforePage = pages[pages.length - 2]; // 前一个页面 
20.                                 uni.requestPayment({ 
21.                                     provider: 'wxpay', 
22.                                     appid: resobj.appId, 
23.                                     package:resobj.package, 
24.                                     nonceStr: resobj.nonceStr, 
25.                                     timeStamp: resobj.timeStamp, 
26.                                     paySign: resobj.paySign, 
27.                                     signType:resobj.signType, 
28.                                     success: res=>{ 
29.                                         uni.hideLoading(); 
30.                                         uni.showToast({title: '支付成功',icon:'none'}) 
31.                                         this.detail(this.type) 
32.                                         uni.navigateBack({ 
33.                                             success: function() { 
34.                                                       beforePage.onLoad(); // 执行前一个页面的onLoad方法 
35.                                             } 
36.                                         }) 
37.                                     }, 
38.                                     fail:err=>{ 
39.                                         uni.hideLoading(); 
40.                                         uni.showToast({title: '支付失败，请稍后再试',icon:'none'}) 
41.                                     } 
42.                                 }); 
43.                             }) 
44.                                 // uni.hideLoading(); 
45.                                 // uni.showToast({title: '服务器开小差了呢，请您稍后再试',icon:'none'}) 
46.   
47.                         }else{ 
48.                             uni.showToast({title: '获取微信通道失败，请检查您的微信是否正常启用',icon:'none'}) 
49.                         } 
50.                     } 
51.                 }); 
52.   
53.             },