iOS开发:微信支付

#import "AppDelegate.h"
#import "WXApi.h"
@interface AppDelegate ()
@end
@implementation AppDelegate
//测试时.真机测试
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    [WXApi registerApp:@"wxb4ba3c02aa476ea1" withDescription:@"微信接口测试"];
    return YES;
}

 //============================================================
     // V3&V4支付流程实现
     // 注意:参数配置请查看服务器端Demo
     // 更新时间：2015年11月20日
     //============================================================
    //微信测试接口,集成时换位自己的后台接口.
     NSString *urlString   = @"http://wxpay.weixin.qq.com/pub_v2/app/app_pay.php?plat=ios";
     //解析服务端返回json数据
     NSError *error;
     //加载一个NSURL对象
     NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:urlString]];
     //将请求的url数据放到NSData对象中
     NSData *response = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
    
     if ( response != nil) {
     NSMutableDictionary *dict = NULL;
     //IOS5自带解析类NSJSONSerialization从response中解析出数据放到字典中
     dict = [NSJSONSerialization JSONObjectWithData:response options:NSJSONReadingMutableLeaves error:&error];
     
     NSLog(@"url:%@",urlString);
     if(dict != nil){
     NSMutableString *retcode = [dict objectForKey:@"retcode"];
     if (retcode.intValue == 0){
     NSMutableString *stamp  = [dict objectForKey:@"timestamp"];
         NSLog(@"%@",retcode);
         NSLog(@"%@",stamp);
     //NSMutableDictionary *signDict = [NSMutableDictionary dictionaryWithObjectsAndKeys:dict[@""], nil]
     
     //调起微信支付
     PayReq* req             = [[PayReq alloc] init];
     req.partnerId           = [dict objectForKey:@"partnerid"];
     req.prepayId            = [dict objectForKey:@"prepayid"];
     req.nonceStr            = [dict objectForKey:@"noncestr"];
     req.timeStamp           = stamp.intValue;
     req.package             = [dict objectForKey:@"package"];
     req.sign                = [dict objectForKey:@"sign"];// @"47B7A45B8DB4E7BB88B8F9F4E268CB5D"; //[dict objectForKey:@"sign"];
     BOOL result = [WXApi sendReq:req];
 
         NSLog(@"-=-=-=-=- %d", result);
     //日志输出
     NSLog(@"appid=%@\npartid=%@\nprepayid=%@\nnoncestr=%@\ntimestamp=%ld\npackage=%@\nsign=%@",[dict objectForKey:@"appid"],req.partnerId,req.prepayId,req.nonceStr,(long)req.timeStamp,req.package,req.sign );
     return @"";
     }else{
     return [dict objectForKey:@"retmsg"];
     }
     }else{
     return @"服务器返回错误，未获取到json对象";
     }
     }else{
     return @"服务器返回错误";
     }
 

//微信回调
-(void) onResp:(BaseResp*)resp
{
    NSString *strMsg = [NSString stringWithFormat:@"errcode:%d", resp.errCode];
    NSString *strTitle;
    
    if([resp isKindOfClass:[SendMessageToWXResp class]])
    {
        strTitle = [NSString stringWithFormat:@"发送媒体消息结果"];
    }
    if([resp isKindOfClass:[PayResp class]]){
        //支付返回结果，实际支付结果需要去微信服务器端查询
        strTitle = [NSString stringWithFormat:@"支付结果"];
        
        switch (resp.errCode) {
            case WXSuccess:
                strMsg = @"支付结果：成功！";
                NSLog(@"支付成功－PaySuccess，retcode = %d", resp.errCode);
                break;
                
            default:
                strMsg = [NSString stringWithFormat:@"支付结果：失败！retcode = %d, retstr = %@", resp.errCode,resp.errStr];
                NSLog(@"错误，retcode = %d, retstr = %@", resp.errCode,resp.errStr);
                break;
        }
    }
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:strTitle message:strMsg delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
    [alert show];
}