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i
platform :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。