很多APP里都有支付，我们一般都是用比较成熟且使用户基数很大的第三方支付，比方支付宝和微信，为用方便，我们一般都会进行封装，这样做的好处就是第三方SDK更换或者者有变动，只对封装的类就行修改就好了。不多说了，直接上代码

用示例代码

支付宝

PayOrderInfo *orderInfo = [[PayOrderInfo alloc] init];orderInfo.payType = PayTypeAli;//orderString由服务器返回orderInfo.orderString = @"app_id=2015052600090779&biz_content=%7B%22timeout_express%22%3A%2230m%22%2C%22seller_id%22%3A%22%22%2C%22product_code%22%3A%22QUICK_MSECURITY_PAY%22%2C%22total_amount%22%3A%220.02%22%2C%22subject%22%3A%221%22%2C%22body%22%3A%22%E6%88%91%E6%98%AF%E6%B5%8B%E8%AF%95%E6%95%B0%E6%8D%AE%22%2C%22out_trade_no%22%3A%22314VYGIAGG7ZOYY%22%7D&charset=utf-8&method=alipay.trade.app.pay&sign_type=RSA2&timestamp=2016-08-15%2012%3A12%3A15&version=1.0&sign=MsbylYkCzlfYLy9PeRwUUIg9nZPeN9SfXPNavUCroGKR5Kqvx0nEnd3eRmKxJuthNUx4ERCXe552EV9PfwexqW%2B1wbKOdYtDIb4%2B7PL3Pc94RZL0zKaWcaY3tSL89%2FuAVUsQuFqEJdhIukuKygrXucvejOUgTCfoUdwTi7z%2BZzQ%3D";orderInfo.scheme = @"alipay";[[PayService defaultService] payOrder:orderInfo result:^(BOOL success, NSString *data) {if (success) {//在此向自己的服务器请求验证支付能否成功}}];[[PayService defaultService] setHandleBackToAppByUnusualWay:^{//通过左上角或者者其余非正常途径返回APP//在此向自己的服务器请求验证支付能否成功NSLog(@"支付验证");}];

微信

PayOrderInfo *orderInfo = [[PayOrderInfo alloc] init];orderInfo.payType = PayTypeWX;orderInfo.openID = @"wxd930ea5d5a258f4f";orderInfo.partnerId = @"10000100";orderInfo.prepayId= @"1101000000140415649af9fc314aa427";orderInfo.package = @"Sign=WXPay";orderInfo.nonceStr= @"a462b76e7436e98e0ed6e13c64b4fd1c";orderInfo.timeStamp= @1397527777;orderInfo.sign= @"582282D72DD2B03AD892830965F428CB16E7A256";[[PayService defaultService] payOrder:orderInfo result:^(BOOL success, NSString *data) {if (success) {//在此向自己的服务器请求验证支付能否成功}}];[[PayService defaultService] setHandleBackToAppByUnusualWay:^{//通过左上角或者者其余非正常途径返回APP//在此向自己的服务器请求验证支付能否成功NSLog(@"支付验证");}];

银联

PayOrderInfo *orderInfo = [[PayOrderInfo alloc] init];orderInfo.payType = PayTypeUnion;orderInfo.scheme = @"unionpay";//orderString由服务器返回orderInfo.orderString = @"app_id=2015052600090779&biz_content=%7B%22timeout_express%22%3A%2230m%22%2C%22seller_id%22%3A%22%22%2C%22product_code%22%3A%22QUICK_MSECURITY_PAY%22%2C%22total_amount%22%3A%220.02%22%2C%22subject%22%3A%221%22%2C%22body%22%3A%22%E6%88%91%E6%98%AF%E6%B5%8B%E8%AF%95%E6%95%B0%E6%8D%AE%22%2C%22out_trade_no%22%3A%22314VYGIAGG7ZOYY%22%7D&charset=utf-8&method=alipay.trade.app.pay&sign_type=RSA2&timestamp=2016-08-15%2012%3A12%3A15&version=1.0&sign=MsbylYkCzlfYLy9PeRwUUIg9nZPeN9SfXPNavUCroGKR5Kqvx0nEnd3eRmKxJuthNUx4ERCXe552EV9PfwexqW%2B1wbKOdYtDIb4%2B7PL3Pc94RZL0zKaWcaY3tSL89%2FuAVUsQuFqEJdhIukuKygrXucvejOUgTCfoUdwTi7z%2BZzQ%3D";orderInfo.mode= @"01";orderInfo.viewController = self;[[PayService defaultService] payOrder:orderInfo result:^(BOOL success, NSString *data) {if (success) {//在此向自己的服务器请求验证支付能否成功}}];[[PayService defaultService] setHandleBackToAppByUnusualWay:^{//通过左上角或者者其余非正常途径返回APP//在此向自己的服务器请求验证支付能否成功NSLog(@"支付验证");}];

Apple Pay

PayOrderInfo *orderInfo = [[PayOrderInfo alloc] init];orderInfo.payType = PayTypeApple;orderInfo.merchantIdentifier = @"";orderInfo.supportBankCards = @[PKPaymentNetworkVisa,PKPaymentNetworkMasterCard];PayShipMethod *method = [[PayShipMethod alloc] init];method.name = @"顺丰快递";method.price = @"20";method.identifier = @"sf";method.detail = @"之所以快，是由于你掏的钱多";orderInfo.shipMethods = @[method];PaySummaryItem *item = [[PaySummaryItem alloc] init];item.name = @"iPhone X";item.price = @"8868";PaySummaryItem *itemTotal = [[PaySummaryItem alloc] init];itemTotal.name = @"App Store";itemTotal.price = @"8868";orderInfo.payTypeSummaryItems = @[item,itemTotal];orderInfo.applicationData = @"id=apple-pay";orderInfo.viewController = self;[[PayService defaultService] payOrder:orderInfo result:nil];[[PayService defaultService] setHandleApplePayAuthorizePayment:^BOOL(PKPayment *payment) {PKPaymentToken *token = payment.token;PKPaymentMethod *method = token.paymentMethod;NSLog(@"PKPaymentMethod==%@",method);//在此根据token向自己的服务器请求验证支付能否成功return YES;}];

以上是具体用方法，假如想理解更具体的用方法和文档说明，可以下载Demo。