1、集成SDK：
下载并解压SDK​:下载链接。

2、添加依赖库
SystemConfiguration.framework
libz.tbd
libc++.tbd
CoreTelephony.framework
CFNetwork.framework
Security.framework
UIKit.framework
Foundation.framework
CoreGraphics.framework
CoreMotion.framework
CoreText.framework

3、新增⼀一条URL Scheme:选中⼯工程Target -> Info -> URLTypes;
identifier随便写，URL scheme此时也可以随便填写，但是要保证调起支付的方法里传的appScheme参数和这里填写的一致

支付宝URL scheme

调起支付的方法中的参数scheme要和URL scheme配置中填写的一样

4、添加⽩白名单:LSApplicationQueriesSchemes新增⽩名单

支付宝白名单

5、在支付页面获取到支付所需要的参数后调用支付方法

   /**
     *  支付宝支付
     */
-(void)handleOrderPayWithParams:(NSDictionary *)aParam
    {
        NSLog(@"aParm = %@",aParam);
        //这里的appScheme一定要与URL  Scheme中的一致
        NSString *appScheme = @"alisdkofshuyinHotel";
        NSString *orderString = aParam[@"orderInfo"];
        // NOTE: 调用支付结果开始支付
        [[AlipaySDK defaultService] payOrder:orderString fromScheme:appScheme callback:^(NSDictionary *resultDic) {
            NSLog(@"reslut = %@",resultDic);
            int statusCode = [resultDic[@"resultStatus"]  intValue];
            if (statusCode == 9000) {
                //订单支付
                [SVProgressHUD showSuccessWithStatus:@"支付成功！"];
                [[NSNotificationCenter defaultCenter] postNotificationName:@"paySuccess" object:nil];
            }else {
                //交易失败
                // [[NSNotificationCenter defaultCenter] postNotificationName:@"PAY_STATUS" object:@"0"];
                [SVProgressHUD showErrorWithStatus:@"支付异常！"];
            }
        }];
    }

6、appDelegate中处理回调结果

//iOS9.0以前
- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation {
    if ([url.host isEqualToString:@"safepay"]) {
        // 支付跳转支付宝钱包进行支付，处理支付结果
        [[AlipaySDK defaultService] processOrderWithPaymentResult:url standbyCallback:^(NSDictionary *resultDic) {
            NSLog(@"result = %@",resultDic);
        }];
        // 授权跳转支付宝钱包进行支付，处理支付结果
        [[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(@"授权结果 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"]) {
        // 支付跳转支付宝钱包进行支付，处理支付结果
        [[AlipaySDK defaultService] processOrderWithPaymentResult:url standbyCallback:^(NSDictionary *resultDic) {
            NSLog(@"result = %@",resultDic);
            if ([resultDic[@"resultStatus"] integerValue] == 9000) {
                [SVProgressHUD showSuccessWithStatus:@"支付成功！"];
                PaySucceedViewController *vc = [[PaySucceedViewController alloc] init];
                vc.backStr = @"1";
                UINavigationController *navi = [[UINavigationController alloc] initWithRootViewController:vc];
                [self.tb presentViewController:navi animated:NO completion:nil];
            }else{
                [SVProgressHUD showSuccessWithStatus:@"支付异常！"];
                PayFailedViewController *vc = [[PayFailedViewController alloc] init];
                vc.backStr = @"1";
                UINavigationController *navi = [[UINavigationController alloc] initWithRootViewController:vc];
                [self.tb presentViewController:navi animated:NO completion:nil];
            }
        }];
        
        // 授权跳转支付宝钱包进行支付，处理支付结果
        [[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(@"授权结果 authCode = %@", authCode?:@"");
        }];
    }
    return YES;
}