本文Demo地址

1.下載支付寶SDK以及Demohttps://doc.open.alipay.com/doc2/detail?treeId=54&articleId=103419&docType=1

2.解壓下載的.zip包，選擇iOS客戶端，看到的目錄結(jié)構(gòu)如下

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3.導(dǎo)入AliSDKDemo中的AliAlipaySDK.bundle AlipaySDK.framework libcrypto.a libssl.a四個文件到工程中

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4.導(dǎo)入demo中相關(guān)文件到項目中

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5.導(dǎo)入后項目結(jié)構(gòu)應(yīng)該是這樣的 其中AliPaySDK是筆者新建的文件夾用于存放支付寶項目文件的，你們可以自己創(chuàng)建文件夾

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6.導(dǎo)入系統(tǒng)依賴庫

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7.此時如果編譯的話，會報錯

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解決方法 在Header Search Paths中添加AliPaySDK路徑

注意 AliPaySDK為筆者自己創(chuàng)建的文件目錄 ，你們可以自行創(chuàng)建，然后換成自己的路徑就可以了

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8.客戶端調(diào)用支付寶SDK

#import "ViewController.h"
#import "Order.h"
#import "APAuthV2Info.h"
#import "DataSigner.h"
#import <AliPaySDK/AlipaySDK.h>

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    UIButton *payButton = [UIButton buttonWithType:UIButtonTypeCustom];
    payButton.frame = CGRectMake(10, 100, self.view.frame.size.width-20, 40);
    [payButton setTitle:@"pay 0.01元" forState:UIControlStateNormal];
    [payButton setTitle:@"pay 0.01元" forState:UIControlStateSelected];
    [payButton setBackgroundColor:[UIColor orangeColor]];
    [payButton addTarget:self action:@selector(payAction) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:payButton];
}

/**
 *  支付按鈕
 */
- (void)payAction
{
    /*============================================================================*/
    /*=======================需要填寫商戶app申請的===================================*/
    /*============================================================================*/
    NSString *partner = @"2088*********"; /** 合作商戶ID  PID */
    NSString *seller = @"填寫支付寶賬號"; /** 支付寶賬號ID  */
    NSString *privateKey = @"很長的一串字符  文章下面有說明如何獲取"; /** 商戶私鑰 自助生成 */
    /*============================================================================*/
    /*============================================================================*/
    /*============================================================================*/
    
    //partner和seller獲取失敗,提示
    if ([partner length] == 0 ||
        [seller length] == 0 ||
        [privateKey length] == 0)
    {
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示"
                                                        message:@"缺少partner或者seller或者私鑰。"
                                                       delegate:self
                                              cancelButtonTitle:@"確定"
                                              otherButtonTitles:nil];
        [alert show];
        return;
    }
    
    
    /*
     *生成訂單信息及簽名
     */
    //將商品信息賦予AlixPayOrder的成員變量
    Order *order = [[Order alloc] init];
    order.partner = partner;
    order.seller = seller;
    order.tradeNO = [self generateTradeNO]; //訂單ID（由商家自行制定）
    order.productName = @"runbey測試商品"; //商品標題
    order.productDescription = @"runbey商品描述"; //商品描述
    order.amount = @"0.01"; //商品價格
    order.notifyURL =  @"http://*****"; //回調(diào)URL 異步通知服務(wù)器支付結(jié)果，便于服務(wù)器更新訂單狀態(tài)
    
//實際項目開發(fā)中 訂單信息應(yīng)該由服務(wù)器返回


    order.service = @"mobile.securitypay.pay";
    order.paymentType = @"1";
    order.inputCharset = @"utf-8";
    order.itBPay = @"30m";
    order.showUrl = @"m.alipay.com";
    
    //應(yīng)用注冊scheme 便于支付結(jié)束后重新打開客戶端
    NSString *appScheme = @"ybpaydemo";
    
    //將商品信息拼接成字符串
    NSString *orderSpec = [order description];
    NSLog(@"orderSpec = %@",orderSpec);
    
    //獲取私鑰并將商戶信息簽名,外部商戶可以根據(jù)情況存放私鑰和簽名,只需要遵循RSA簽名規(guī)范,并將簽名字符串base64編碼和UrlEncode
    id<DataSigner> signer = CreateRSADataSigner(privateKey);
    NSString *signedString = [signer signString:orderSpec];
    
    //將簽名成功字符串格式化為訂單字符串,請嚴格按照該格式
    NSString *orderString = nil;
    if (signedString != nil) {
        orderString = [NSString stringWithFormat:@"%@&sign=\"%@\"&sign_type=\"%@\"",
                       orderSpec, signedString, @"RSA"];
        
        NSLog(@"簽名字符串:%@",orderString);
        
        [[AlipaySDK defaultService] payOrder:orderString fromScheme:appScheme callback:^(NSDictionary *resultDic) {
            NSLog(@"支付結(jié)果reslut = %@",resultDic);
        }];
    }
}

#pragma mark -
#pragma mark   ==============產(chǎn)生隨機訂單號==============

- (NSString *)generateTradeNO
{
    static int kNumber = 15;
    
    NSString *sourceStr = @"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    NSMutableString *resultStr = [[NSMutableString alloc] init];
    srand((unsigned)time(0));
    for (int i = 0; i < kNumber; i++)
    {
        unsigned index = rand() % [sourceStr length];
        NSString *oneStr = [sourceStr substringWithRange:NSMakeRange(index, 1)];
        [resultStr appendString:oneStr];
    }
    return resultStr;
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

9.針對以上代碼做幾點說明

• 如何獲取商戶私鑰 privateKey 鏈接地址

1.Mac終端中輸入 openssl 進入Openssl程序

2. 生成私鑰 命令 genrsa -out rsa_private_key.pem 1024
   3.iOS客戶端需要將生成的私鑰轉(zhuǎn)換成PKCS8格式 命令 pkcs8 -topk8 -inform PEM -in rsa_private_key.pem -outform PEM -nocrypt

獲取到pkcs8格式的字符串就是項目中需要的privatekey,取-----BEGIN PRIVATE KEY-----和 -----END PRIVATE KEY-----

中間的部分 切記！?。。?/em>
4.生成公鑰 命令 rsa -in rsa_private_key.pem -pubout -out rsa_public_key.pem