本篇博客是接着上一篇AFNetworking源码解析的后续，如果想对AFNetworking源码有所了解。
请读一下https://www.cnblogs.com/guohai-stronger/p/9191497.html。
这篇博客主要是对AFNetworking代码进行封装，也是自己在实际项目中所使用过的（对中小型企业或者项目）可直接使用，也会在github上传（偷偷窃喜一下，一直想在github上有所项目，一直没有时间），趁着端午几天有时间，给github贡献点自己力量。本篇读下来大约10-15分钟，欢迎指正。
一.结构解析
最核心（可直接拖拽到新项目中）
(拓展cocoapods的拖入) 拖入之前，需要导入AFNetworking，最好利用cocoapods导入，cocoapods导入时
vim Podfile ????--->输入iplatform :ios, ‘8.0‘target "targetName" dopod ‘AFNetworking‘end
（有一点在然后按Esc，并且输入“ ：”号进入vim命令模式，然后在冒号后边输入wq）最后pod install。编译一下，拖入项目的类就好了，就不会编译错误。
二.分类讲解
1.Singleton
#import <UIKit/UIKit.h>////////////////////////////////////////////////////////////////////////////////// 申明和定义单例对象:// AS_SINGLETON( XxxClass );// DEF_SINGLETON( XxxClass );#undef ???AS_SINGLETON#define AS_SINGLETON( __class ) - (__class *)sharedInstance; + (__class *)sharedInstance;#undef ???DEF_SINGLETON#define DEF_SINGLETON( __class ) - (__class *)sharedInstance { ????return [__class sharedInstance]; } + (__class *)sharedInstance { ????static dispatch_once_t once; ????static __class * __singleton__; ????dispatch_once( &once, ^{ __singleton__ = [[[self class] alloc] init]; } ); ????return __singleton__; }通过Singleton，来声明和定义单例对象。
声明单例
// 声明单例AS_SINGLETON(APIClient);
定义单例
// 定义单例DEF_SINGLETON(APIClient);
2.APIClient.h
（1）请求响应的状态
// 请求响应的状态typedef NS_ENUM(NSInteger, ApiRequestStatusCode) { ???ApiRequestNotReachable = -2, ???// 当前网络已断开 ???ApiRequestErr ?????????= -1, ???// 请求出错 ???ApiRequestOK ??????????= 0, ????// 请求成功};当时的请求响应状态只有三个，故定义一个枚举表示请求响应的状态。
（2）请求的方法类型
// 请求的方法类型typedef NS_ENUM(NSInteger, HttpMethod) { ???GET ????????= 0, ???POST ???????= 1, ???DELETE ?????= 2, ???PUT ????????= 3, ???PATH_GET ???= 4, // GET请求,填充参数到url上,处理@"user/account/check/{phone}",{phone}这种情况 ???QUERY_GET ??= 5, // GET请求,填充query参数到url上,处理"?a=1&b=2"这种情况};（3）请求相应的block
// 请求响应Blocktypedef void (^APIClientRequestResponse)(ApiRequestStatusCode requestStatusCode, id JSON);
（4）通过设置代理拦截成功响应数据
@protocol APIClientDelegate <NSObject>@required// 拦截成功请求响应数据进行处理- (void)handleSuccessRequest:(id)JSON completion:(void(^)(id aJSON))cb;@end
在.h中还有一些方法属性
// 为处理拦截的响应数据而设置的委托@property (nonatomic, weak) id<APIClientDelegate> delegate;// 声明单例AS_SINGLETON(APIClient);// 获取当前的网络状态类型(返回:0-No wifi or cellular(无网络), 1-2G, 2-3G, 3-4G, 4-LTE, 5-wifi)+ (int)networkType;// 网络状态监听，应用当前是否有网络:有返回YES,没有返回NO+ (void)networkReachableWithBlock:(void(^)(BOOL isReachable))block;// 发送请求，返回JSON格式的响应数据+ (void)requestURL:(NSString *)urlString ???????httpMethod:(HttpMethod)method ???????????params:(NSDictionary *)params ?????????response:(APIClientRequestResponse)response;// 取消掉所有网络请求+ (void)cancelAllRequest;
3.APIClient.m
(1)创建请求管理对象
@property (nonatomic, strong) AFHTTPSessionManager *manager;
(2)获取当前的网络状态类型
// 获取当前的网络状态类型(返回:0-No wifi or cellular(无网络), 1-2G, 2-3G, 3-4G, 4-LTE, 5-wifi)+ (int)networkType { ???NSArray *subviews = [[[[UIApplication sharedApplication] valueForKey:@"statusBar"] valueForKey:@"foregroundView"]subviews]; ???NSNumber *dataNetworkItemView = nil; ???????for (id subview in subviews) { ???????if([subview isKindOfClass:[NSClassFromString(@"UIStatusBarDataNetworkItemView") class]]) { ???????????dataNetworkItemView = subview; ???????????break; ???????} ???} ???int ret = 0; ???switch ([[dataNetworkItemView valueForKey:@"dataNetworkType"] integerValue]) { ???????case 0: ???????????ret = 0; ???????????break; ???????case 1: ???????????ret = 1; ???????????break; ???????case 2: ???????????ret = 2; ???????????break; ???????case 3: ???????????ret = 3; ???????????break; ???????case 4: ???????????ret = 4; ???????????break; ???????case 5: ???????????ret = 5; ???????????break; ???????default: ???????????break; ???} ???return ret;}(3)网络状态监听，应用当前是否有网络
// 网络状态监听，应用当前是否有网络+ (void)networkReachableWithBlock:(void(^)(BOOL isReachable))block { ???[[AFNetworkReachabilityManager sharedManager] startMonitoring]; ???????[[AFNetworkReachabilityManager sharedManager] setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) { ???????switch (status) { ???????????case AFNetworkReachabilityStatusReachableViaWWAN: ???????????case AFNetworkReachabilityStatusReachableViaWiFi: { ???????????????if (block) { ???????????????????block(YES); ???????????????} ???????????????break; ???????????} ???????????case AFNetworkReachabilityStatusNotReachable: { ???????????????if (block) { ???????????????????block(NO); ???????????????} ???????????????break; ???????????} ???????????default: ???????????????break; ???????} ???}]; ???????//结束监听 ???//[[AFNetworkReachabilityManager sharedManager] stopMonitoring];}(3)请求最重要最核心的代码
// 发送请求，返回JSON格式的响应数据+ (void)requestURL:(NSString *)urlString ???????httpMethod:(HttpMethod)method ???????????params:(NSDictionary *)params ?????????response:(APIClientRequestResponse)response { ???if ([APIClient networkType] > 0) { ???????APIClient *client = [APIClient sharedInstance]; ???????if (!client.manager) { ???????????AFHTTPSessionManager *manager = [AFHTTPSessionManager manager]; ???????????manager.requestSerializer.timeoutInterval = 30; ???????????manager.requestSerializer ????= [AFHTTPRequestSerializer serializer]; ???????????manager.responseSerializer ???= [AFJSONResponseSerializer serializer]; ???????????AFJSONResponseSerializer *responseSerializer = [AFJSONResponseSerializer serializerWithReadingOptions:NSJSONReadingAllowFragments]; ???????????manager.responseSerializer = responseSerializer; ???????????manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"application/json", @"text/json", @"text/javascript",@"text/html",@"text/plain",@"application/x-www-form-urlencodem", nil]; ???????????????????????????????????client.manager = manager; ???????} ???????????????__weak typeof(self)weakSelf = self; ???????switch (method) { ???????????case PATH_GET: { ???????????????urlString = [APIClient pathGet:urlString params:params];// ???????????????//LOG(@"PATH_GET http_url:%@",urlString); ???????????????[client.manager GET:urlString ????????????????????????parameters:nil ??????????????????????????progress:nil ???????????????????????????success:^(NSURLSessionDataTask * __unused task, id JSON) { ???????????????????????????????__strong typeof(weakSelf)strongSelf = weakSelf; ???????????????????????????????if (strongSelf) { ???????????????????????????????????[strongSelf handleSuccessRequest:JSON cb:response]; ???????????????????????????????} ???????????????????????????} ???????????????????????????failure:^(NSURLSessionDataTask *__unused task, NSError *error) { ???????????????????????????????if (response) { ???????????????????????????????????response(ApiRequestErr, nil); ???????????????????????????????} ???????????????????????????}]; ???????????????break; ???????????} ???????????case QUERY_GET: { ???????????????urlString = [APIClient queryGet:urlString params:params]; ???????????????//LOG(@"QUERY_GET http_url:%@",urlString); ???????????????[client.manager GET:urlString ????????????????????????parameters:nil ??????????????????????????progress:nil ???????????????????????????success:^(NSURLSessionDataTask * __unused task, id JSON) { ???????????????????????????????__strong typeof(weakSelf)strongSelf = weakSelf; ???????????????????????????????if (strongSelf) { ???????????????????????????????????[strongSelf handleSuccessRequest:JSON cb:response]; ???????????????????????????????} ???????????????????????????} ???????????????????????????failure:^(NSURLSessionDataTask *__unused task, NSError *error) { ???????????????????????????????if (response) { ???????????????????????????????????response(ApiRequestErr, nil); ???????????????????????????????} ???????????????????????????}]; ???????????????break; ???????????} ???????????case GET: {// ???????????????//LOG(@"GET http_url:%@",urlString); ???????????????[client.manager GET:urlString ?????????????????parameters:nil ???????????????????progress:nil ????????????????????success:^(NSURLSessionDataTask * __unused task, id JSON) { ????????????????????????__strong typeof(weakSelf)strongSelf = weakSelf; ????????????????????????if (strongSelf) { ????????????????????????????[strongSelf handleSuccessRequest:JSON cb:response]; ????????????????????????} ????????????????????} ????????????????????failure:^(NSURLSessionDataTask *__unused task, NSError *error) { ????????????????????????if (response) { ????????????????????????????response(ApiRequestErr, nil); ????????????????????????????//LOG(@"GET http_url:%@",urlString); ????????????????????????} ????????????????????}]; ???????????????break; ???????????} ???????????case POST: {// ???????????????//LOG(@"POST http_url:%@",urlString); ???????????????[client.manager POST:urlString ??????????????????parameters:params ????????????????????progress:nil ?????????????????????success:^(NSURLSessionDataTask * __unused task, id JSON) { ?????????????????????????__strong typeof(weakSelf)strongSelf = weakSelf; ?????????????????????????if (strongSelf) { ?????????????????????????????[strongSelf handleSuccessRequest:JSON cb:response]; ?????????????????????????} ?????????????????????} ?????????????????????failure:^(NSURLSessionDataTask *__unused task, NSError *error) {// ?????????????????????????//LOG(@"%@",error); ?????????????????????????if (response) { ?????????????????????????????response(ApiRequestErr, nil); ?????????????????????????} ?????????????????????}]; ???????????????break; ???????????} ???????????case DELETE: { ???????????????//LOG(@"DELETE http_url:%@",urlString); ???????????????[client.manager DELETE:urlString ????????????????????parameters:nil ???????????????????????success:^(NSURLSessionDataTask * __unused task, id JSON) { ???????????????????????????__strong typeof(weakSelf)strongSelf = weakSelf; ???????????????????????????if (strongSelf) { ???????????????????????????????[strongSelf handleSuccessRequest:JSON cb:response]; ???????????????????????????} ???????????????????????} ???????????????????????failure:^(NSURLSessionDataTask *__unused task, NSError *error) { ???????????????????????????if (response) { ???????????????????????????????response(ApiRequestErr, nil); ???????????????????????????} ???????????????????????}]; ???????????????break; ???????????} ???????????case PUT: { ???????????????//LOG(@"PUT http_url:%@",urlString); ???????????????[client.manager PUT:urlString ?????????????????parameters:params ????????????????????success:^(NSURLSessionDataTask * __unused task, id JSON) { ????????????????????????__strong typeof(weakSelf)strongSelf = weakSelf; ????????????????????????if (strongSelf) { ????????????????????????????[strongSelf handleSuccessRequest:JSON cb:response]; ????????????????????????} ????????????????????} ????????????????????failure:^(NSURLSessionDataTask *__unused task, NSError *error) { ????????????????????????if (response) { ????????????????????????????response(ApiRequestErr, nil); ????????????????????????} ????????????????????}]; ???????????????break; ???????????} ???????} ???} else { // 没有连接网络 ???????if (response) ???????????response(ApiRequestNotReachable, nil); ???}}(4)统一处理响应数据
// 统一处理响应数据+ (void)handleSuccessRequest:(id)JSON cb:(void(^)(ApiRequestStatusCode requestStatusCode, id JSON))cb { ???APIClient *client = [APIClient sharedInstance]; ???if (client.delegate && [client.delegate respondsToSelector:@selector(handleSuccessRequest:completion:)]) { ???????[client.delegate handleSuccessRequest:JSON ?????????????????????????????completion:^(id aJSON) { ?????????????????????????????????if (cb) { ?????????????????????????????????????cb(ApiRequestOK, aJSON); ?????????????????????????????????} ?????????????????????????????}]; ???} else { ???????if (cb) { ???????????cb(ApiRequestOK, JSON); ???????} ???}}(5)参数拼接
// 填充参数到url上,处理@"user/account/check/{phone}",{phone}这种情况+ (NSString *)pathGet:(NSString *)uri ??????????????params:(NSDictionary *)params { ???if (nil == uri|| nil == params || params.count <= 0) { ???????return ?uri; ???} ???for (NSString *key in params) { ???????NSString *key2 = [NSString stringWithFormat:@"{%@}",key]; ???????if ([uri rangeOfString:key2].location != NSNotFound) { ???????????uri = [uri stringByReplacingOccurrencesOfString:key2 withString:params[key]]; ???????} ???} ???return [uri stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];}// 填充query参数到url上,处理"?a=1&b=2"这种情况+ (NSString *)queryGet:(NSString *)uri ???????????????params:(NSDictionary *)params { ???if (nil == uri || nil == params || params.count <= 0) { ???????return ?uri; ???} ???NSMutableString *tmpUri = [NSMutableString stringWithString:uri]; ???int i = 0; ???for (NSString *key in params) { ???????if (i == 0) { ???????????[tmpUri appendFormat:@"?%@=%@",key, params[key]]; ???????} else { ???????????[tmpUri appendFormat:@"&%@=%@",key, params[key]]; ???????} ???????i++; ???} ???return [tmpUri stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];;}(6)取消所有网络请求
// 取消掉所有网络请求+ (void)cancelAllRequest { ???APIClient *client = [APIClient sharedInstance]; ???if (client.manager) { ???????if (client.manager.operationQueue) { ???????????[client.manager.operationQueue cancelAllOperations]; ???????} ???}}上面就是代码的主要封装，可以应对中小型企业和App的要求。
三.使用
1.新建API.h继承NSObject
2.在API.m使用
3.在控制器里面调用如下
WS(weakSelf); ???if ([APIClient networkType] > 0){ ???????//获取个人界面的信息 ???????[API1 getEvaluateMeDataWithCB:^(ApiRequestStatusCode requestStatusCode, id JSON) { ???????????switch (requestStatusCode) { ???????????????case ApiRequestOK: { ???????????????????//正确解析json，以及UI处理break; ???????????????????} ???????????????} ???????????????case ApiRequestErr: ???????????????????[MBProgressHUD showError:kErrTip]; ???????????????????break; ???????????????case ApiRequestNotReachable: ???????????????????[MBProgressHUD showError:kNotReachableTip]; ???????????????????break; ???????????????default: ???????????????????break; ???????????} ???????}]; ???}else{ ???????[MBProgressHUD showError:kNotReachableTip]; ???}上面就是针对AFNetworking的简单封装，可以满足网络请求的封装。
本次代码的demo已上传git。github地址：https://github.com/zxy1829760/testAF
欢迎指正。
AFNetworking封装-项目使用
原文地址：https://www.cnblogs.com/guohai-stronger/p/9193465.html