iOS 网络请求（基于AFNetworking的再次封装）

说到AFNetworking，应该是现在应用的最广泛的第三方库了，而且封装的非常好了，不少人拿过AFN之后，直接使用了，也没什么问题，最多接口不统一，维护困难一些～
不过最好还是对AFN再进行维护一番比较好。

XZNetWorkTool.h文件的声明：

#import <Foundation/Foundation.h>
#import "AFNetworking.h"

NS_ASSUME_NONNULL_BEGIN

@interface XZNetWorkTool : NSObject

+ (instancetype)shareInstance;

/**
 *  发送get请求
 *
 *  @param url                      请求路径
 *  @param parameters               请求参数
 *  @param header                   请求头Header
 *  @param downloadProgressBlock    网络请求进度
 *  @param success                  请求成功后的回调,参数为id类型
 *  @param failure                  请求失败后的回调
 */
- (NSURLSessionDataTask *)GET:(NSString *)url
                   parameters:(id)parameters
          httpHeaderKeyValues:(NSDictionary *)header
                     progress:(void (^)(NSProgress *downloadProgress))downloadProgressBlock
                      success:(void (^)(id responseObject))success
                      failure:(void (^)(NSError *error))failure;

- (NSURLSessionDataTask *)GET:(NSString *)url
                   parameters:(id)parameters
                     progress:(void (^)(NSProgress *downloadProgress))downloadProgressBlock
                      success:(void (^)(id responseObject))success
                      failure:(void (^)(NSError *error))failure;



/**
 *  发送post请求
 *
 *  @param url          请求路径
 *  @param parameters   请求参数
 *  @param header       请求头Header
 *  @param success      请求成功后的回调,参数为id类型
 *  @param failure      请求失败后的回调
 */
- (NSURLSessionDataTask *)POST:(NSString *)url
                    parameters:(id)parameters
           httpHeaderKeyValues:(NSDictionary *)header
                      progress:(void (^)(NSProgress *downloadProgress))downloadProgressBlock
                       success:(void (^)(id responseObject))success
                       failure:(void (^)(NSError *error))failure;

- (NSURLSessionDataTask *)POST:(NSString *)url
                    parameters:(id)parameters
                      progress:(void (^)(NSProgress *downloadProgress))downloadProgressBlock
                       success:(void (^)(id responseObject))success
                       failure:(void (^)(NSError *error))failure;



/**
 *  上传文件
 *
 *  @param url              请求路径
 *  @param parameters       请求参数
 *  @param header           请求头Header
 *  @param formDataBlock    上传文件的信息
 *  @param success          请求成功后的回调,参数为id类型
 *  @param failure          请求失败后的回调
 */
- (NSURLSessionDataTask *)upload:(NSString *)url
                      parameters:(id)parameters
             httpHeaderKeyValues:(NSDictionary *)header
       constructingBodyWithBlock:(void (^)(id <AFMultipartFormData> formData))formDataBlock
                         success:(void (^)(id responseObject))success
                         failure:(void (^)(NSError *error))failure;

- (NSURLSessionDataTask *)upload:(NSString *)url
                      parameters:(id)parameters
       constructingBodyWithBlock:(void (^)(id <AFMultipartFormData> formData))formDataBlock
                         success:(void (^)(id responseObject))success
                         failure:(void (^)(NSError *error))failure;



/**
 *  下载
 *
 *  @param url                      请求路径
 *  @param parameters               请求参数
 *  @param header                   请求头Header
 *  @param downloadProgressBlock    下载进度
 *  @param destination              请求成功后的回调,参数为id类型
 *  @param completionHandler        请求失败后的回调
 */
- (NSURLSessionDownloadTask *)download:(NSString *)url
                            parameters:(id)parameters
                   httpHeaderKeyValues:(NSDictionary *)header
                              progress:(void (^)(NSProgress *downloadProgress))downloadProgressBlock
                           destination:(NSURL * (^)(NSURL *targetPath, NSURLResponse *response))destination
                     completionHandler:(void (^)(NSURLResponse *response, NSURL *filePath, NSError *error))completionHandler;

- (NSURLSessionDownloadTask *)download:(NSString *)url
                            parameters:(id)parameters
                              progress:(void (^)(NSProgress *downloadProgress))downloadProgressBlock
                           destination:(NSURL * (^)(NSURL *targetPath, NSURLResponse *response))destination
                     completionHandler:(void (^)(NSURLResponse *response, NSURL *filePath, NSError *error))completionHandler;


@end

NS_ASSUME_NONNULL_END

XZNetWorkTool.m文件：

#import "XZNetWorkTool.h"

@implementation XZNetWorkTool

static id _instance = nil;
+ (instancetype)shareInstance {
    return [[self alloc] init];
}

+ (instancetype)allocWithZone:(struct _NSZone *)zone {
    
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        _instance = [super allocWithZone:zone];
    });
    return _instance;
}

- (instancetype)init {
    
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        _instance = [super init];
        
        AFNetworkReachabilityManager *manager = [AFNetworkReachabilityManager sharedManager];
        [manager startMonitoring];
        [manager setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
            switch (status) {
                case AFNetworkReachabilityStatusUnknown:
                    // 未知网络
                    break;
                case AFNetworkReachabilityStatusNotReachable:
                    // 无法联网
                    break;
                case AFNetworkReachabilityStatusReachableViaWiFi:
                    // 手机自带网络2G/3G/4G网络
                    break;
                case AFNetworkReachabilityStatusReachableViaWWAN:
                    // WIFI网络下
                    break;
                default:
                    break;
            }
        }];
    });
    return _instance;
}



/**
 *  发送get请求
 */
- (NSURLSessionDataTask *)GET:(NSString *)url
                   parameters:(id)parameters
          httpHeaderKeyValues:(NSDictionary *)header
                     progress:(void (^)(NSProgress *downloadProgress))downloadProgressBlock
                      success:(void (^)(id responseObject))success
                      failure:(void (^)(NSError *error))failure {
    
    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    
    /**
     *  可以接受的类型
     */
    manager.responseSerializer = [AFHTTPResponseSerializer serializer];

    manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"application/json", @"text/json", @"text/javascript", @"text/plain", nil];
    
    /**
     *  请求超时的时间
     */
    manager.requestSerializer.timeoutInterval = 30;
    
    /**
     *  Header 请求头
     */
    if (header) {
        [header enumerateKeysAndObjectsUsingBlock:^(id  _Nonnull key, id  _Nonnull obj, BOOL * _Nonnull stop) {
            [manager.requestSerializer setValue:obj forHTTPHeaderField:key];
        }];
    }
    
    NSURLSessionDataTask *task = [manager GET:url parameters:parameters progress:downloadProgressBlock success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        if (success) {
            success(responseObject);
        }
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        if (failure) {
            failure(error);
        }
    }];
    
    return task;
}

- (NSURLSessionDataTask *)GET:(NSString *)url
                   parameters:(id)parameters
                     progress:(void (^)(NSProgress *downloadProgress))downloadProgressBlock
                      success:(void (^)(id responseObject))success
                      failure:(void (^)(NSError *error))failure {
    return [self GET:url parameters:parameters httpHeaderKeyValues:@{} progress:downloadProgressBlock success:success failure:failure];
}




/**
 *  发送post请求
 */
- (NSURLSessionDataTask *)POST:(NSString *)url
                    parameters:(id)parameters
           httpHeaderKeyValues:(NSDictionary *)header
                      progress:(void (^)(NSProgress *downloadProgress))downloadProgressBlock
                       success:(void (^)(id responseObject))success
                       failure:(void (^)(NSError *error))failure {
    
    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    
    /**
     *  可以接受的类型
     */
    manager.responseSerializer = [AFHTTPResponseSerializer serializer];

    manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"application/json", @"text/json", @"text/javascript", @"text/plain", nil];
    
    /**
     *  请求超时的时间
     */
    manager.requestSerializer.timeoutInterval = 30;
    
    /**
     *  Header 请求头
     */
    if (header) {
        [header enumerateKeysAndObjectsUsingBlock:^(id  _Nonnull key, id  _Nonnull obj, BOOL * _Nonnull stop) {
            [manager.requestSerializer setValue:obj forHTTPHeaderField:key];
        }];
    }
    
    NSURLSessionDataTask *task = [manager POST:url parameters:parameters progress:downloadProgressBlock success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        if (success) {
            success(responseObject);
        }
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        if (failure) {
            failure(error);
        }
    }];
    
    return task;
}

- (NSURLSessionDataTask *)POST:(NSString *)url
                    parameters:(id)parameters
                      progress:(void (^)(NSProgress *downloadProgress))downloadProgressBlock
                       success:(void (^)(id responseObject))success
                       failure:(void (^)(NSError *error))failure {
    return [self POST:url parameters:parameters httpHeaderKeyValues:@{} progress:downloadProgressBlock success:success failure:failure];
}



/**
 *  上传文件
 */
- (NSURLSessionDataTask *)upload:(NSString *)url
                      parameters:(id)parameters
             httpHeaderKeyValues:(NSDictionary *)header
       constructingBodyWithBlock:(void (^)(id <AFMultipartFormData> formData))formDataBlock
                         success:(void (^)(id responseObject))success
                         failure:(void (^)(NSError *error))failure {
    
    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    
    /**
     *  可以接受的类型
     */
    manager.responseSerializer = [AFHTTPResponseSerializer serializer];

    manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"application/json", @"text/json", @"text/javascript", @"text/plain", nil];
    
    /**
     *  请求超时的时间
     */
    manager.requestSerializer.timeoutInterval = 30;
    
    /**
     *  Header 请求头
     */
    if (header) {
        [header enumerateKeysAndObjectsUsingBlock:^(id  _Nonnull key, id  _Nonnull obj, BOOL * _Nonnull stop) {
            [manager.requestSerializer setValue:obj forHTTPHeaderField:key];
        }];
    }
    
    NSURLSessionDataTask *task = [manager POST:url parameters:parameters constructingBodyWithBlock:^(id<AFMultipartFormData>  _Nonnull formData) {
        if (formDataBlock) {
            formDataBlock(formData);
        }
    } progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        if (success) {
            success(responseObject);
        }
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        if (failure) {
            failure(error);
        }
    }];
    
    return task;
}

- (NSURLSessionDataTask *)upload:(NSString *)url
                      parameters:(id)parameters
       constructingBodyWithBlock:(void (^)(id <AFMultipartFormData> formData))formDataBlock
                         success:(void (^)(id responseObject))success
                         failure:(void (^)(NSError *error))failure {
    return [self upload:url parameters:parameters httpHeaderKeyValues:@{} constructingBodyWithBlock:formDataBlock success:success failure:failure];
}




/**
 *  下载
 */
- (NSURLSessionDownloadTask *)download:(NSString *)url
                            parameters:(id)parameters
                   httpHeaderKeyValues:(NSDictionary *)header
                              progress:(void (^)(NSProgress *downloadProgress))downloadProgressBlock
                           destination:(NSURL * (^)(NSURL *targetPath, NSURLResponse *response))destination
                     completionHandler:(void (^)(NSURLResponse *response, NSURL *filePath, NSError *error))completionHandler {
    
    NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
    AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];
    
    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:url]];
    
    NSURLSessionDownloadTask *task = [manager downloadTaskWithRequest:request progress:downloadProgressBlock destination:destination completionHandler:completionHandler];
    [task resume];
    return task;
}

- (NSURLSessionDownloadTask *)download:(NSString *)url
                            parameters:(id)parameters
                              progress:(void (^)(NSProgress *downloadProgress))downloadProgressBlock
                           destination:(NSURL * (^)(NSURL *targetPath, NSURLResponse *response))destination
                     completionHandler:(void (^)(NSURLResponse *response, NSURL *filePath, NSError *error))completionHandler {
    return [self download:url parameters:parameters httpHeaderKeyValues:@{} progress:downloadProgressBlock destination:destination completionHandler:completionHandler];
}

@end