NSTimer* timer = [NSTimer scheduledTimerWithTimeInterval:2.0 
                              target:self 
                              selector:@selector(handleTimer:) 
                              userInfo:@"someString" repeats:NO];

- (void)handleTimer:(NSTimer*)theTimer {

   NSLog (@"Got the string: %@", (NSString*)[theTimer userInfo]);

}

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    UIWebView *webView = [[UIWebView alloc] initWithFrame:CGRectZero];
    NSString *userAgent = [webView stringByEvaluatingJavaScriptFromString:@"navigator.userAgent"];
    NSString *newUserAgent = [userAgent stringByAppendingString:@" native_iOS"];//自定义需要拼接的字符串
    NSDictionary *dictionary = [NSDictionary dictionaryWithObjectsAndKeys:newUserAgent, @"UserAgent", nil];
    [[NSUserDefaults standardUserDefaults] registerDefaults:dictionary];
}

WKWebView *wkWebView = [[WKWebView alloc] initWithFrame:self.view.bounds];
[self.view addSubview: wkWebView];
NSString *customUserAgent = @"native_iOS";
[[NSUserDefaults standardUserDefaults] registerDefaults:@{@"UserAgent":customUserAgent}];
NSURL *url = [NSURL URLWithString:self.strUrl];
NSURLRequest *request = [NSURLRequest requestWithURL:url
                                             cachePolicy:NSURLRequestUseProtocolCachePolicy
                                         timeoutInterval:10.f];
[self.wkWebView loadRequest:request];

self.wkWebView = [[WKWebView alloc] initWithFrame:self.view.bounds];
__weak typeof(self) weakSelf = self;
[self.wkWebView evaluateJavaScript:@"navigator.userAgent" completionHandler:^(id result, NSError *error) {
       __strong typeof(weakSelf) strongSelf = weakSelf;
       NSString *userAgent = result;
       NSString *newUserAgent = [userAgent stringByAppendingString:@" native_iOS"];
       NSDictionary *dictionary = [NSDictionary dictionaryWithObjectsAndKeys:newUserAgent, @"UserAgent", nil];
       [[NSUserDefaults standardUserDefaults] registerDefaults:dictionary];
       // needs retain because `evaluateJavaScript:` is asynchronous
       strongSelf.wkWebView = [[WKWebView alloc] initWithFrame:strongSelf.view.bounds];
 }];
 [self.wkWebView loadRequest:request];

Page({
  data: {
    openid: '',
    order_id: ''
  },
  onLoad: function (options) {
    console.log('pay')
    this.setData({
      order_id: options.order_id
    })
    this.getOpenId()
  },
  getOpenId: function () {
    var that = this;
    wx.login({
      success: function (res) {
        if (res.code) {
          //发起网络请求  
          wx.request({
            url: 'https://www.wondercv.com/zh-CN/interface/pages/get_wx_mini_open_id',
            // url: 'http://localhost:3000/zh-CN/interface/pages/get_wx_mini_open_id',
            method: 'GET',
            data: {
              code: res.code
            },
            success: function (response) {
              console.log('get open id =====================' + response.data.open_id)  
              that.setData({
                openid: response.data.open_id
              });
              that.getPaymentParams();
            },
          })
        } else {
          console.log('获取用户登录态失败！' + res.errMsg)
        }
      }
    });  
  },
  getPaymentParams: function(openId){
    wx.request({
      url: 'https://www.wondercv.com/zh-CN/interface/pages/wechat_mini_information',
      // url: 'http://localhost:3000/zh-CN/interface/pages/wechat_mini_information',
      method: 'GET',
      data: {
        open_id: this.data.openid,
        order_id: this.data.order_id
      },
      success: function (response) {
        console.log('get payment params=========================')
        console.log(response)
        wx.requestPayment({
          //相关支付参数
          'timeStamp': response.data.timeStamp,
          'nonceStr': response.data.nonceStr,
          'package': response.data.pre_package,
          'signType': response.data.signType,
          'paySign': response.data.sign,
          //小程序微信支付成功的回调通知
          'success': function (res) {
            console.log("支付成功");
          },
          //小程序支付失败的回调通知
          'fail': function (res) {
            console.log("支付失败");
            console.log(res);
          }
        })
      },
    })
  },

})

res = RestClient.get 'https://api.weixin.qq.com/sns/jscode2session?appid=' +
                        ENV['WECHAT_MINIPROGRAM_APP_ID'] + '&secret=' + ENV['WECHAT_MINIPROGRAM_APP_SECRECT'] + '&js_code=' + params[:code] +
                        '&grant_type=authorization_code'
  Rails.logger.info("code=======================#{params[:code]}")
  open_id = JSON.parse(res.body)['openid']
  Rails.logger.info("=======================#{JSON.parse(res.body)}")
  render json: {
    open_id: open_id
  }