拿走即用之afn封装（OC版）

afn封装

一旦AFN有较大的变动，用到AFN的项目需要更改很多的地方，为了避免这种情况，一般会对AFN封装出一个类，这样有了变动之后，只需要更改这个类即可（代码如下）

.h文件

 #import <Foundation/Foundation.h>  typedef NS_ENUM(NSInteger, RequestMethod) {     post,     get };  @interface NetworkTools : NSObject  + (instancetype)shareNetworkTools;  /**  * requestMethod:请求方式  * urlString:请求地址  * parameters:请求参数  * responseBlock:请求成功或失败的回调  */  - (void)requestWithMethod:(RequestMethod)requestMethod andUrlString:(NSString *)urlString andParameters:(id) parameters andFinished:(void(^)(id response, NSError *error))responseBlock;  /**  * data:上传资料  * name:上传资料的名字  * urlString:请求地址  * parameters:请求参数  * responseBlock:请求成功或失败的回调  */  - (void)requestWithData:(NSData *)data andName:(NSString *)name andUrlString:(NSString *)urlString andParameters:(id) parameters andFinished:(void(^)(id response, NSError *error))responseBlock;  @end

.m文件

 #import "NetworkTools.h" #import <AFNetworking.h>  @implementation NetworkTools  + (instancetype)shareNetworkTools {     static NetworkTools *networkTools = nil;     static dispatch_once_t onceToken;     dispatch_once(&onceToken, ^{         networkTools = [[NetworkTools alloc] init];     });     return networkTools; }  - (void)requestWithMethod:(RequestMethod)requestMethod andUrlString:(NSString *)urlString andParameters:(id) parameters andFinished:(void(^)(id response, NSError *error))responseBlock {     // 定义成功的block     void (^success)(NSURLSessionDataTask *dataTask, id responseObject) = ^(NSURLSessionDataTask *dataTask,id responseObject)     {         responseBlock(responseObject, nil);     };     // 定义失败的block     void (^failure)(NSURLSessionDataTask *dataTask,NSError *error) = ^(NSURLSessionDataTask *dataTask,NSError *error)     {         responseBlock(nil, error);     };     if (requestMethod == get) {         [[AFHTTPSessionManager manager] GET:urlString parameters:parameters success:success failure:failure];     } else {         [[AFHTTPSessionManager manager] POST:urlString parameters:parameters success:success failure:failure];     } }  - (void)requestWithData:(NSData *)data andName:(NSString *)name andUrlString:(NSString *)urlString andParameters:(id) parameters andFinished:(void(^)(id response, NSError *error))responseBlock {     void (^success)(NSURLSessionDataTask *dataTask, id responseObject) = ^(NSURLSessionDataTask *dataTask,id responseObject)     {         responseBlock(responseObject, nil);     };     void (^failure)(NSURLSessionDataTask *dataTask,NSError *error) = ^(NSURLSessionDataTask *dataTask,NSError *error)     {         responseBlock(nil, error);     };     [[AFHTTPSessionManager manager] POST:urlString parameters:parameters constructingBodyWithBlock:^(id<AFMultipartFormData>  _Nonnull formData) {         [formData appendPartWithFileData:data name:name fileName:@"aa" mimeType:@"application/octet-stream"];     } success:success failure:failure]; }  @end

via：http://www.jianshu.com/p/37ba814bb66d