一.越來越多的app增加第三方的功能，可能app有不同的頁面但調用相同的支付方式，例如界面如下：
這兩個頁面都會使用第三方支付支付：（微信，支付寶，銀聯）如果在每一個頁面都直接調用第三方支付的接口全部代碼，顯然并不是很合適，更何況，可能一個app并不止兩個入口。所以封裝還是很有必要的。
1.新建Model：-------后臺返回支付方式的列表json
#import <Foundation/Foundation.h>@interface IOAPayItemModel : NSObject//name:代表是支付寶，微信，銀聯或者余額等@property (nonatomic, copy) NSString *name;//icon:代表是支付方式的圖片@property (nonatomic, copy) NSString *icon;//code:代表支付方式的唯一標識@property (nonatomic, copy) NSString *code;//payType:代表支付類型（自己確定的）@property (nonatomic, assign) NSInteger payType;@end
#import "IOAPayItemModel.h"@implementation IOAPayItemModel@end
2.封裝第三方支付接口以及回調接口-----直接上源代碼----會有解釋（相信大家的能力，肯定能看懂）
#import <Foundation/Foundation.h>//支付寶SDK#import <AlipaySDK/AlipaySDK.h>//微信接口#import <WXApi.h>//銀聯接口#import "UPPaymentControl.h"/** 枚舉：列出第三方支付方式 */typedef NS_ENUM(NSInteger, PayType) { kPayTypeWXPay, // 微信支付 kPayTypeALiPay, // 支付寶支付 kPayTypeUNPay // 銀聯支付};/** IOAPayRequestModel:第三方支付需要的參數 */@interface IOAPayRequestModel: NSObject@property (nonatomic, assign) PayType payType;/** 支付寶和銀聯-后臺返回是字符串類型----支付寶和銀聯使用此方式 */@property (nonatomic, copy) NSString *payString;@property (nonatomic, copy) NSString *appScheme; // 根據設置的paytype設置/** 微信-后臺返回是字典類型--- 微信使用此方式 */@property (nonatomic, strong) NSDictionary *userInfo;@end/** 第三方支付接口返回的數據--- */@interface IOAPayResponseModel: NSObject@property (nonatomic, assign) PayType payType;//result和userInfo信息判斷支付結果--（支付成功、支付失敗、支付取消等）@property (nonatomic, assign) NSInteger result;@property (nonatomic, strong) NSDictionary *userInfo;@end@interface IOAPayApi : NSObject//支付返回的回調方法@property (nonatomic, copy) void (^callback)(IOAPayResponseModel *response);//支付請求model ----IOAPayRequestModel---第三方支付需要的參數@property (nonatomic, strong) IOAPayRequestModel *payRequestModel;//單例方法+ (instancetype)defaultPayManager;// 是否安裝了客戶端- (BOOL)isPayAppInstalled:(PayType)payType;// 支付- (void)pay:(IOAPayRequestModel *)payRequestModel callback:(void (^)(IOAPayResponseModel *response))callback;// 支付回調- (void)payCallbackWithUrl:(NSURL *)url;@end#import "IOAPayApi.h"@implementation IOAPayRequestModel- (void)setPayType:(PayType)payType { _payType = payType; if (_payType == kPayTypeALiPay) { self.appScheme = @"IOAAlipaySDK"; // 測試// self.payString = @"alipay_sdk=1.0&app_id=2018012502067343&biz_content=%7B%22subject%22%3A%22%E6%94%AF%E4%BB%98%E5%AE%9D%E6%94%AF%E4%BB%98%22%2C%22out_trade_no%22%3A%222018032100007%22%2C%22total_amount%22%3A%220.01%22%2C%22product_code%22%3A%22QUICK_MSECURITY_PAY%22%2C%22timeout_express%22%3A%2210m%22%2C%22seller_id%22%3A%222088001065568658%22%7D&charset=UTF-8&format=json&method=alipay.trade.app.pay¬ify_url=api.ioa365.net%2Fapp%2Fapi%2FPayment%2Falipay_notify&sign_type=RSA2×tamp=2018-03-21+16%3A59%3A15&version=1.0&sign=SFyiWFqdkG98qarJFKfNjts8w2RS7ATwjCRyNnKYILDaVVFEnR%2F943QjK9WFaZgipx38rZuRf%2Bl4M74Hp2PO%2F%2F0ZfSKAntTU3DMLIVgt4YD42W1F2lOP3iXtkL5BHpPzt6YfDQueCz1zReeAWQXlyBDvvnjbJ9p67f2jt8jfqM6Enz6kWwY5cShyDD6iJQF0FKXdmSYA%2BiCO6IIHdiqKsRLHuBPb8lfSxJyY1%2FbaAUysIB3%2BiU6HWASUGadCVL769ivwHKwdjZQZUoFpjcfnneyZG3%2B4f%2FnlBrY1pKk3ZWy2UqpTtk0w0GofsF167dRz47J0lW7UufyM8uA%2BIhZ7Lw%3D%3D"; return; } if (_payType == kPayTypeUNPay) { self.appScheme = @"UPPay"; // 測試// self.payString = @"559018436594292239101"; return; } // 測試// self.userInfo = @{// @"appid":@"wx66a3135d1354b23b",// @"noncestr":@"J8pJbaEg6AjDQ9kk",// @"partnerid":@"1497576612",// @"prepayid":@"wx20180321170621b3fbce61a20187009040",// @"result_code":@"SUCCESS",// @"return_code":@"SUCCESS",// @"return_msg":@"OK",// @"sign":@"29FFF7B63A71D3FB4C6866BDBC443F72",// @"timestamp":@"1521623180",// @"trade_type":@"APP",// };}@end@implementation IOAPayResponseModel@end@interface IOAPayApi() <WXApiDelegate>@end@implementation IOAPayApi//單例方法static IOAPayApi *manager = nil;+ (instancetype)defaultPayManager { static dispatch_once_t onceToken; dispatch_once(&onceToken, ^{ manager = [IOAPayApi new]; }); return manager;}+ (instancetype)allocWithZone:(struct _NSZone *)zone { static dispatch_once_t onceToken; dispatch_once(&onceToken, ^{ manager = [super allocWithZone:zone]; }); return manager;}//copy在底層 會調用copyWithZone:- (instancetype)copyWithZone:(NSZone *)zone { return [[self class] defaultPayManager];}+ (instancetype)copyWithZone:(struct _NSZone *)zone { return [self defaultPayManager];}+ (instancetype)mutableCopyWithZone:(struct _NSZone *)zone { return [self defaultPayManager];}- (instancetype)mutableCopyWithZone:(NSZone *)zone { return [[self class] defaultPayManager];}#pragma mark - WeiChatPayDelegate- (void)onResp:(BaseResp *)resp { //啟動微信支付的response if (self.payRequestModel.payType == kPayTypeWXPay) { if (self.callback) { IOAPayResponseModel *payResponseModel = [IOAPayResponseModel new]; payResponseModel.result = 0; if([resp isKindOfClass:[PayResp class]]){ //支付返回結果，實際支付結果需要去微信服務器端查詢 switch (resp.errCode) { case 0:// payResoult = @"支付結果：成功！"; payResponseModel.result = 1; break; case -1: payResponseModel.result = 0; break; case -2: payResponseModel.result = 0; break; default: break; } } self.callback(payResponseModel); } }}#pragma mark - Public// 是否安裝了客戶端- (BOOL)isPayAppInstalled:(PayType)payType { switch (payType) { case kPayTypeWXPay: return [WXApi isWXAppInstalled]; break; case kPayTypeALiPay: // 未提供接口 返回NO return NO; break; case kPayTypeUNPay: return [[UPPaymentControl defaultControl] isPaymentAppInstalled]; break; default: break; } return NO;}- (void)pay:(IOAPayRequestModel *)payRequestModel callback:(void (^)(IOAPayResponseModel *response))callback { if (!payRequestModel) return; self.callback = callback; self.payRequestModel = payRequestModel; switch (payRequestModel.payType) { case kPayTypeWXPay: [self wxPay:payRequestModel]; break; case kPayTypeALiPay: [self aliPay:payRequestModel]; break; case kPayTypeUNPay: [self unPay:payRequestModel]; break; default: break; }}// 支付回調- (void)payCallbackWithUrl:(NSURL *)url { // 其他如支付等SDK的回調 if ([url.host isEqualToString:@"safepay"]) { [self aliPayCallback:url]; } else if ([url.host isEqualToString:@"pay"]) { // 處理微信的支付結果 [self wxPayCallback:url]; } else if ([url.host isEqualToString:@"uppayresult"]) { [self unPayCallback:url]; }}#pragma mark - Pay// 微信支付- (void)wxPay:(IOAPayRequestModel *)payRequestModel { PayReq *req = [[PayReq alloc] init]; NSDictionary *dataDic = payRequestModel.userInfo; //由用戶微信號和AppID組成的唯一標識，用于校驗微信用戶 req.openID = dataDic[@"appid"]; // 商家id，在注冊的時候給的 req.partnerId = dataDic[@"partnerid"]; // 預支付訂單這個是后臺跟微信服務器交互后，微信服務器傳給你們服務器的，你們服務器再傳給你 req.prepayId = dataDic[@"prepayid"]; // 根據財付通文檔填寫的數據和簽名 req.package = @"Sign=WXPay"; // 隨機編碼，為了防止重復的，在后臺生成 req.nonceStr = dataDic[@"noncestr"]; // 這個是時間戳，也是在后臺生成的，為了驗證支付的 NSString * stamp = dataDic[@"timestamp"]; req.timeStamp = stamp.intValue; // 這個簽名也是后臺做的 req.sign = dataDic[@"sign"]; //發送請求到微信，等待微信返回onResp [WXApi sendReq:req];}// 支付寶- (void)aliPay:(IOAPayRequestModel *)payRequestModel { NSString *appScheme = payRequestModel.appScheme; NSString *payString = payRequestModel.payString; __weak __typeof(self)weakSelf = self; [[AlipaySDK defaultService] payOrder:payString fromScheme:appScheme callback:^(NSDictionary *resultDic) { if (weakSelf.payRequestModel.payType == kPayTypeALiPay) { if (weakSelf.callback) { IOAPayResponseModel *payResponseModel = [IOAPayResponseModel new]; payResponseModel.userInfo = resultDic; payResponseModel.result = [resultDic[@"result"] integerValue]; weakSelf.callback(payResponseModel); } } }];}// 銀聯支付- (void)unPay:(IOAPayRequestModel *)payRequestModel { NSString *appScheme = payRequestModel.appScheme; NSString *payString = payRequestModel.payString; [[UPPaymentControl defaultControl] startPay:payString fromScheme:appScheme mode:@"01" viewController:[UIApplication sharedApplication].keyWindow.rootViewController];}//////- (void)wxPayCallback:(NSURL *)url { //跳轉支付寶錢包進行支付，處理支付結果 [WXApi handleOpenURL:url delegate:self];}- (void)aliPayCallback:(NSURL *)url { __weak typeof(self)weakSelf = self; [[AlipaySDK defaultService] processOrderWithPaymentResult:url standbyCallback:^(NSDictionary *resultDic) { if (weakSelf.payRequestModel.payType == kPayTypeALiPay) { if (weakSelf.callback) { IOAPayResponseModel *payResponseModel = [IOAPayResponseModel new]; payResponseModel.userInfo = resultDic; payResponseModel.result = [resultDic[@"result"] integerValue]; weakSelf.callback(payResponseModel); } } }];}- (void)unPayCallback:(NSURL *)url { __weak typeof(self)weakSelf = self; [[UPPaymentControl defaultControl]handlePaymentResult:url completeBlock:^(NSString *code, NSDictionary *data) { if (weakSelf.payRequestModel.payType == kPayTypeUNPay) { if (weakSelf.callback) { IOAPayResponseModel *payResponseModel = [IOAPayResponseModel new]; payResponseModel.userInfo = data; if ([code isEqualToString:@"success"]) { [[NSNotificationCenter defaultCenter] postNotificationName:@"YINLIANPAYS" object:nil]; payResponseModel.result = [code boolValue]; } else if([code isEqualToString:@"fail"]) { //交易失敗 [[NSNotificationCenter defaultCenter] postNotificationName:@"YINLIANPAYF" object:nil]; payResponseModel.result = [code boolValue]; } else if([code isEqualToString:@"cancel"]) { //交易取消 [[NSNotificationCenter defaultCenter] postNotificationName:@"YINLIANPAYC" object:nil]; payResponseModel.result = 0; } weakSelf.callback(payResponseModel); } } }];}@end3.此時方法就開始封裝好了，可以在需要的地方直接使用（彈框已作出）
- (void)alipay{ [self startProgress]; self.requestModel.pay_type = @"alipayMobile"; //自己后臺的接口---拿到后臺返回的數據作為第三方接口的參數 [self.viewModel requestCartSettlePay:self.requestModel callback:^(IOAResponse *response) { dispatch_async(dispatch_get_main_queue(), ^{ [self stopProgress]; if (response.success) { NSString *appScheme = @"IOAAlipaySDK"; self.payRequestModel.payString = response.responseObject; self.payRequestModel.payType = 1; self.payRequestModel.appScheme = appScheme; //第三方接口調用（封裝） [[IOAPayApi defaultPayManager] pay:self.payRequestModel callback:^(IOAPayResponseModel *response) { dispatch_async(dispatch_get_main_queue(), ^{ NSDictionary *userInfo = response.userInfo; if (![userInfo[@"resultStatus"] isEqualToString:@"9000"]) { //進入待付款界面(支付失敗或者支付取消等) [self pushWait]; }else{ //進入訂單列表界面（支付成功） [self pushList]; } }); }]; }else{ [self.view makeToast:@"支付失敗"]; } }); }];}4.重磅來臨（一些人彈框沒有作出，可以直接拷貝下面代碼）
新建控制器控制彈框.h文件中
#import <UIKit/UIKit.h>#import "IOAPayApi.h"#import "IOAPayItemModel.h"@interface IOAPayViewController : UIViewController//點擊第幾行回調聲明@property (nonatomic, copy) void (^clickCallback)(NSInteger atIndex);+ (instancetype)show;//block回調方法+ (instancetype)show:(void (^)(NSInteger atIndex))clickCallback;+ (void)dismiss;- (void)setupItemTitles:(NSArray <NSString *>*)titles;- (void)setupItems:(NSArray <IOAPayItemModel *>*)items;- (void)setupTitle:(NSString *)title;@end
實現其方法.m文件中
#import "IOAPayViewController.h"#define PayCellHeight 50#define PaySectionHeaderHeight 44@interface IOAPayViewController () <UITableViewDataSource, UITableViewDelegate>@property (nonatomic, strong) CALayer *maskLayer;@property (nonatomic, strong) UILabel *titleView;@property (nonatomic, strong) UIView *payBgView;@property (nonatomic, strong) UITableView *tableView;@property (nonatomic, strong) NSMutableArray *dataSources;@property (nonatomic, assign) CGFloat payViewHeight;- (void)showPayView;- (void)dismissPayView;@end@implementation IOAPayViewController- (void)dealloc {}+ (instancetype)show { UIViewController *rootvc = [UIApplication sharedApplication].keyWindow.rootViewController; IOAPayViewController *vc = [IOAPayViewController new]; [rootvc addChildViewController:vc]; [rootvc.view addSubview:vc.view]; [vc setupItemTitles:@[@"微信支付", @"支付寶支付", @"銀聯支付"]]; [vc showPayView]; return vc;}+ (instancetype)show:(void (^)(NSInteger atIndex))clickCallback { IOAPayViewController *vc = [self show]; vc.clickCallback = clickCallback; return vc;}+ (void)dismiss { UIViewController *rootvc = [UIApplication sharedApplication].keyWindow.rootViewController; for (UIViewController *vc in rootvc.childViewControllers) { if ([vc isKindOfClass:[IOAPayViewController class]]) { IOAPayViewController *tempVC = (IOAPayViewController *)vc; [tempVC dismissPayView]; return; } }}- (void)viewDidLoad { [super viewDidLoad]; self.view.backgroundColor = [UIColor clearColor]; self.maskLayer.frame = self.view.bounds; [self.view.layer addSublayer:self.maskLayer]; [self.view addSubview:self.payBgView];// [self.view addSubview:self.tableView];}- (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated.}#pragma mark - UITableViewDataSource- (NSInteger )numberOfSectionsInTableView:(UITableView *)tableView { return 1;}- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return self.dataSources.count;}- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell" forIndexPath:indexPath]; id temp = self.dataSources[indexPath.row]; if ([temp isKindOfClass:[NSString class]]) { cell.textLabel.text = temp; } else { IOAPayItemModel *item = temp; cell.textLabel.text = item.name; } cell.textLabel.font = [UIFont systemFontOfSize:18]; cell.textLabel.textColor = RGB_HEXString(@"#323232"); cell.selectionStyle = UITableViewCellSelectionStyleNone; return cell;}#pragma mark - UITableViewDelegate- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath { return PayCellHeight;}- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section { return self.titleView;}- (CGFloat )tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section { return PaySectionHeaderHeight;}- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {// IOAPayRequestModel *payRequestModel = [IOAPayRequestModel new];// payRequestModel.payType = indexPath.row;//// WS(weakSelf);//// __weak typeof (self)weakSelf = self;// __block IOAPayViewController *payVC = self;// [[IOAPayApi defaultPayManager] pay:payRequestModel callback:^(IOAPayResponseModel *response) {//// __strong __typeof (weakSelf)strongSelf = weakSelf;// response.payType = indexPath.row;// if (payVC.clickCallback) {// payVC.clickCallback(response);// payVC = nil;// }// }]; if (self.clickCallback) { self.clickCallback(indexPath.row); } [self dismissPayView];}#pragma mark - Touches- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event { [self dismissPayView];}#pragma mark - Public- (void)setupItemTitles:(NSArray<NSString *> *)titles { if (!titles.count) { return ; } self.payViewHeight = titles.count * PayCellHeight + PaySectionHeaderHeight; CGRect frame = self.view.frame; frame.size.height = self.payViewHeight; self.tableView.frame = frame; [self.dataSources removeAllObjects]; [self.dataSources addObjectsFromArray:titles]; [self.tableView reloadData]; [self setPayViewFrame];}- (void)setupItems:(NSArray <IOAPayItemModel *>*)items { if (!items.count) { return ; } for (IOAPayItemModel *item in items) { if ([item.code isEqualToString:@"appWeixinPay"]) { item.payType = 0; continue; } if ([item.code isEqualToString:@"alipayMobile"]) { item.payType = 1; continue; } if ([item.code isEqualToString:@"unionpay"]) { item.payType = 2; continue; } if ([item.code isEqualToString:@"ye"]) { item.payType = 3; continue; } item.payType = 3; } self.payViewHeight = items.count * PayCellHeight + PaySectionHeaderHeight; CGRect frame = self.view.frame; frame.size.height = self.payViewHeight; self.tableView.frame = frame; [self.dataSources removeAllObjects]; [self.dataSources addObjectsFromArray:items]; [self.tableView reloadData]; [self setPayViewFrame];}- (void)setupTitle:(NSString *)title { self.titleView.text = title;}#pragma mark - Private- (void)showPayView { [self.view.layer removeAllAnimations]; CGFloat payBgViewHeight = self.payViewHeight + BottomHeightOffset; CGRect frame = self.view.frame; frame.origin.y = self.view.frame.origin.y + self.view.frame.size.height; frame.size.height = payBgViewHeight; self.payBgView.frame = frame; frame.origin.y = self.view.frame.size.height - payBgViewHeight; [UIView animateWithDuration:0.25 animations:^{ self.payBgView.frame = frame; }];}- (void)setPayViewFrame { CGFloat payBgViewHeight = self.payViewHeight + BottomHeightOffset; CGRect frame = self.view.frame; frame.origin.y = self.view.frame.origin.y + self.view.frame.size.height; frame.size.height = payBgViewHeight; frame.origin.y = self.view.frame.size.height - payBgViewHeight; self.payBgView.frame = frame;}- (void)dismissPayView { CGFloat payBgViewHeight = self.payViewHeight + BottomHeightOffset; CGRect frame = self.view.frame; frame.origin.y = self.view.frame.origin.y + self.view.frame.size.height; frame.size.height = payBgViewHeight; [UIView animateWithDuration:0.25 animations:^{ self.payBgView.frame = frame; } completion:^(BOOL finished) { [self.view removeFromSuperview]; [self removeFromParentViewController]; }];}#pragma mark - Setter / Getter- (CALayer *)maskLayer { if (_maskLayer == nil) { _maskLayer = [CALayer layer]; _maskLayer.backgroundColor = [UIColor blackColor].CGColor; _maskLayer.opacity = 0.2; } return _maskLayer;}- (UILabel *)titleView { if (!_titleView) { _titleView = [UILabel new]; _titleView.textAlignment = NSTextAlignmentCenter; _titleView.text = @"請選擇支付方式"; _titleView.font = [UIFont systemFontOfSize:16]; _titleView.textColor = [UIColor blackColor]; _titleView.backgroundColor = RGB_HEXString(@"#f2f2f2");//[UIColor whiteColor]; } return _titleView;}- (UIView *)payBgView { if (!_payBgView) { _payBgView = [UIView new]; _payBgView.backgroundColor = [UIColor whiteColor]; [_payBgView addSubview:self.tableView]; } return _payBgView;}- (UITableView *)tableView{ if (!_tableView) { _tableView = [[UITableView alloc]initWithFrame:CGRectZero style:UITableViewStylePlain]; _tableView.delegate = self; _tableView.dataSource = self; _tableView.showsVerticalScrollIndicator = NO; _tableView.showsHorizontalScrollIndicator = NO; _tableView.separatorStyle = UITableViewCellSeparatorStyleSingleLine; _tableView.separatorColor = RGB_HEXString(@"#f2f2f2"); if ([_tableView respondsToSelector:@selector(setSeparatorInset:)]) { [_tableView setSeparatorInset:UIEdgeInsetsZero]; } if ([_tableView respondsToSelector:@selector(setLayoutMargins:)]) { [_tableView setLayoutMargins:UIEdgeInsetsZero]; } // [_tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:@"Cell"]; } return _tableView;}- (NSMutableArray *)dataSources { if (!_dataSources) { _dataSources = [NSMutableArray array]; } return _dataSources;}- (void)setPayViewHeight:(CGFloat)payViewHeight { _payViewHeight = payViewHeight; CGFloat height = self.view.frame.size.height * 0.6; self.tableView.scrollEnabled = NO; if (_payViewHeight > height) { _payViewHeight = height; self.tableView.scrollEnabled = YES; }}@end舉例方法
利用請求的數據進行賦值傳值。
IOAOrderBaseModel *dataSourceModel = self.dataSource[indexPath.section]; IOAOrderSelectAbleItemModel *itemModel = (IOAOrderSelectAbleItemModel *) dataSourceModel.items[row]; IOAPayViewController *vc = [IOAPayViewController show:^(NSInteger atIndex) { IOAPayItemModel *payItem = itemModel.items[atIndex]; itemModel.selectedIndex = atIndex; weakSelf.requestModel.pay_type = payItem.code; weakSelf.payItem = payItem; [weakSelf.tableView reloadSections:[NSIndexSet indexSetWithIndex:section] withRowAnimation:UITableViewRowAnimationNone]; }]; [vc setupItems:self.confirmOrderInfo.payment_list]; [vc setupTitle:@"請選擇支付方式"];最后的舉例方法并不是所有的適用，對于上面1.2.3還是可以直接拿過去使用，這些都是原創，如果第一次接入還是希望各位讀者讀一下上篇文章，集成的整個過程，這個代碼的整個demo。
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