为尽量保证AFN的原汁原味和实用性,但又不至于让项目对第三方框架的过渡依赖,对AFN进行了二次封装

1.创建一个继承自NSObject的类,在 .h 文件中提供 get,post,upload,cancel四种方法

@class QYUploadFile;
@interface QYHttpTool : NSObject
/// get
+ (void)GET:(NSString *)urlString
 parameters:(id)parameters
   progress:(void (^)(NSProgress* downloadProgress))downloadProgress
    success:(void (^)(id responseObject))success
    failure:(void (^)(NSError* error))failure;

/// post
+ (void)POST:(NSString *)urlString
  parameters:(id)parameters
    progress:(void (^)(NSProgress *uploadProgress))uploadProgress
     success:(void (^)(id responseObject))success
     failure:(void (^)(NSError* error))failure;

/// upload
+ (void)upload:(NSString *)urlString
    parameters:(id)parameters
    uploadFile:(QYUploadFile* )uploadFile
      progress:(void (^)(NSProgress* uploadProgress))progress
       success:(void (^)(id responseObject))success
       failure:(void (^)(NSError* error))failure;

/// 取消发出请求后对回调block的操作
+ (void)cancelAllOperations;

在.m文件具体实现

+ (void)GET:(NSString *)urlString
        parameters:(id)parameters
        progress:(void (^)(NSProgress* downloadProgress))progress
        success:(void (^)(id responseObject))success
        failure:(void (^)(NSError* error))failure{
    
    QYHttpSessionManager*  manager = [QYHttpSessionManager sharedManager];
    
    [manager GET:urlString parameters:parameters progress:^(NSProgress * _Nonnull downloadProgress) {
        if (progress) {
            progress(downloadProgress);
        }
    } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        if (success) {
            success(responseObject);
        }
        
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        if (failure) {
            failure(error);
        }
    }];
    
}

+ (void)POST:(NSString *)urlString
  parameters:(id)parameters
    progress:(void (^)(NSProgress *uploadProgress))progress
     success:(void (^)(id responseObject))success
     failure:(void (^)(NSError* error))failure{
    
    QYHttpSessionManager*  manager = [QYHttpSessionManager sharedManager];

    [manager POST:urlString parameters:parameters progress:^(NSProgress * _Nonnull uploadProgress) {
        if (progress) {
            progress(uploadProgress);
        }
    } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        if (success) {
            success(responseObject);
        }
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        if (failure) {
            failure(error);
        }
    }];

}

+ (void)upload:(NSString *)urlString
       parameters:(id)parameters
       uploadFile:(QYUploadFile* )uploadFile
      progress:(void (^)(NSProgress* uploadProgress))progress
       success:(void (^)(id responseObject))success
       failure:(void (^)(NSError* error))failure{
    
    QYHttpSessionManager*  manager = [QYHttpSessionManager sharedManager];

    
    [manager POST:urlString parameters:parameters constructingBodyWithBlock:^(id<AFMultipartFormData> _Nonnull formData) {
        
        /**
          上传的文件全部拼接到formData
         *
         *  FileData:要上传的文件的二进制数据
         *  name:上传参数名称
         *  fileName：上传到服务器的文件名称
         *  mimeType：文件类型
         */
        [formData appendPartWithFileData:uploadFile.data name:uploadFile.paramName fileName:uploadFile.fileName mimeType:uploadFile.mimeType];

    } progress:^(NSProgress * _Nonnull uploadProgress) {
        if (progress) {
            progress(uploadProgress);
        }
    } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        if (success) {
            success(responseObject);
        }
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        if (failure) {
            failure(error);
        }
    }];

}

+ (void)cancelAllOperations {
    [[QYHttpSessionManager sharedManager].operationQueue cancelAllOperations];
}

2.创建一个继承自AFHTTPSessionManager类 QYHttpSessionManager,设置为单例

//单例方法
+(instancetype)sharedManager {
    
    static QYHttpSessionManager *manager;
    
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        manager = [QYHttpSessionManager manager];
        // 其它配置设置
        manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"application/json", @"text/json", @"text/javascript",@"text/html", nil];
    
    });
    
    return manager;
}

3.为防止工具类中上传文件方法对AFMultipartFormData的依赖,创建一个模型类QYUploadFile存储上传文件信息,还可以根据 formData的需要向该类增加新的属性

/**
 *  上传文件的二进制数据
 */
@property (nonatomic, strong) NSData *data;
/**
 *  上传的参数名称
 */
@property (nonatomic, copy) NSString* paramName;
/**
 *  上传到服务器后的文件名称
 */
@property (nonatomic, copy) NSString *fileName;

/**
 *  上传文件的类型
 */
@property (nonatomic, copy) NSString *mimeType;