一、支付宝
支付宝自带的有支付回调的block
在AppDelegate.h里面
9.0新的

- (BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary<NSString*, id> *)options
{
if ([url.host isEqualToString:@"safepay"]) {
        //跳转支付宝钱包进行支付，处理支付结果
      [[AlipaySDK  defaultService] processOrderWithPaymentResult:url standbyCallback:^(NSDictionary *resultDic) {
 if ([statusStr isEqualToString:@"9000"]) {
            NSLog(@"支付成功");
       //发送对应的通知
[[NSNotificationCenter defaultCenter] postNotificationName:@"successPay" object:nil];

        } else if ([statusStr isEqualToString:@"8000"]) {
            NSLog(@"正在处理中");
            /
        } else if ([statusStr isEqualToString:@"6001"]) {
          
            NSLog(@"用户中途取消支付");
        } else if ([statusStr isEqualToString:@"6002"]) {
            NSLog(@"网络故障支付失败");
        } else if ([statusStr isEqualToString:@"4000"]) {
            NSLog(@"支付失败");
       
        }
 }

在支付页面注册通知，跳转对应页面

-(void)registerNotification
{
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(successPay) name:@"successPay" object:nil];
    
     [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(failePay) name:@"failePay" object:nil];
}


-(void)successPay
{
    //成功支付
   //也可以从服务端获取结果后在跳转（后台给的API查询支付结果）
    PaySuccessViewController *success = [[PaySuccessViewController alloc]init];
    [self.navigationController pushViewController:success animated:YES];
}

二、微信
微信差不多

- (BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary<NSString*, id> *)options
{

 return [WXApi handleOpenURL:url delegate:self];
}

//微信回调，微信给的接口

-(void)onResp:(BaseResp*)resp
{
    PayResp*response=(PayResp*)resp;
    switch(response.errCode)
    {
        case WXSuccess:
            //服务器端查询支付通知或查询API返回的结果再提示成功
            
            [[NSNotificationCenter defaultCenter] postNotificationName:@"successPay" object:nil];
            NSLog(@"支付成功");
            break;
        case WXErrCodeUserCancel:
            //服务器端查询支付通知或查询API返回的结果再提示成功
            [[NSNotificationCenter defaultCenter] postNotificationName:@"failePay" object:nil];
            NSLog(@"用户取消支付");
            break;
        default:
            [[NSNotificationCenter defaultCenter] postNotificationName:@"failePay" object:nil];
            NSLog(@"支付失败，retcode=%d",resp.errCode);
            break;
    }