1.在支付時(shí)使用的是

[[AlipaySDK defaultService] payOrder: fromScheme: callback:^(NSDictionary *resultDic) {
NSLog(@"%@",result)}]； 

在跳轉(zhuǎn)到支付寶客戶端支付成功后，回調(diào)不響應(yīng)。
解決方法：
需要在AppDelegate中添加兩個(gè)方法：

 - (BOOL)application:(UIApplication *)application
            openURL:(NSURL *)url
  sourceApplication:(NSString *)sourceApplication
         annotation:(id)annotation
{
    if ([url.host isEqualToString:@"safepay"]) {
        // 支付跳轉(zhuǎn)支付寶錢包進(jìn)行支付，處理支付結(jié)果
        [[AlipaySDK defaultService] processOrderWithPaymentResult:url standbyCallback:^(NSDictionary *resultDic) {
            NSLog(@"result = %@",resultDic);
        }];
        
        // 授權(quán)跳轉(zhuǎn)支付寶錢包進(jìn)行支付，處理支付結(jié)果
        [[AlipaySDK defaultService] processAuth_V2Result:url standbyCallback:^(NSDictionary *resultDic) {
            NSLog(@"result = %@",resultDic);
            // 解析 auth code
            NSString *result = resultDic[@"result"];
            NSString *authCode = nil;
            if (result.length>0) {
                NSArray *resultArr = [result componentsSeparatedByString:@"&"];
                for (NSString *subResult in resultArr) {
                    if (subResult.length > 10 && [subResult hasPrefix:@"auth_code="]) {
                        authCode = [subResult substringFromIndex:10];
                        break;
                    }
                }
            }
            NSLog(@"授權(quán)結(jié)果 authCode = %@", authCode?:@"");
        }];
    }
    return YES;
}

// NOTE: 9.0以后使用新API接口
- (BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary<NSString*, id> *)options
{
    if ([url.host isEqualToString:@"safepay"]) {
        // 支付跳轉(zhuǎn)支付寶錢包進(jìn)行支付，處理支付結(jié)果
        [[AlipaySDK defaultService] processOrderWithPaymentResult:url standbyCallback:^(NSDictionary *resultDic) {
            NSLog(@"result = %@",resultDic);
        }];
        
        // 授權(quán)跳轉(zhuǎn)支付寶錢包進(jìn)行支付，處理支付結(jié)果
        [[AlipaySDK defaultService] processAuth_V2Result:url standbyCallback:^(NSDictionary *resultDic) {
            NSLog(@"result = %@",resultDic);
            // 解析 auth code
            NSString *result = resultDic[@"result"];
            NSString *authCode = nil;
            if (result.length>0) {
                NSArray *resultArr = [result componentsSeparatedByString:@"&"];
                for (NSString *subResult in resultArr) {
                    if (subResult.length > 10 && [subResult hasPrefix:@"auth_code="]) {
                        authCode = [subResult substringFromIndex:10];
                        break;
                    }
                }
            }
            NSLog(@"授權(quán)結(jié)果 authCode = %@", authCode?:@"");
        }];
    }
    return YES;
}

注：SDK下載地址：https://doc.open.alipay.com/doc2/detail.htm?treeId=54&articleId=104509&docType=1