解决iOS调起微信支付显示系统繁忙问题

#pragma 微信支付 
-(void) payMwxpay:(Mwxpay *) mwxpay{ 
  // 跟友盟微信分享SDK冲突，支付时需要重新注册微信APPID一次 
  // 获取plist文件路径 
  NSString *path = [[NSBundle mainBundle] pathForResource:@"appchange.plist" ofType:nil]; 
  NSDictionary *dict = [NSDictionary dictionaryWithContentsOfFile:path]; 
  // 从字典中取出注册微信 appid 
  [WXApi registerApp:[dict toString:@"weixin_appId"] withDescription:@"aiwufu"]; 
  PayReq* req = [[PayReq alloc] init]; 
//  if ([mwxpay.package isEqualToString:@"Sign=Wxpay"]) { 
//    mwxpay.package=@"Sign=WXPay"; 
//  } 
//  if (mwxpay.sign!=nil) { 
//    mwxpay.sign=[mwxpay.sign uppercaseString]; 
//  } 
  req.openID = mwxpay.appid; 
  req.partnerId = mwxpay.partnerid; 
  req.prepayId = mwxpay.prepayid; 
  req.nonceStr = mwxpay.noncestr; 
  req.timeStamp = [mwxpay.timestamp intValue]; 
  req.package = mwxpay.package; 
  req.sign = mwxpay.sign; 
  [WXApi sendReq:req]; 
  NSLog(@"appid=%@\npartid=%@\nprepayid=%@\nnoncestr=%@\ntimestamp=%ld\npackage=%@\nsign=%@",req.openID,req.partnerId,req.prepayId,req.nonceStr,(long)req.timeStamp,req.package,req.sign ); 
}