網(wǎng)絡(luò)請求工具是我們經(jīng)常用到的工具類，下面用OC語言和Swift語言封裝AFNetworking網(wǎng)絡(luò)請求工具，廢話不多說，直接上代碼。

OC語言封裝AFN網(wǎng)絡(luò)請求工具

• 創(chuàng)建類NetworkTool，繼承AFHTTPSessionManager

.h文件

#import <Foundation/Foundation.h>
#import "AFNetworking.h"
@interface NetworkTool : AFHTTPSessionManager
//創(chuàng)建單例
+ (instancetype)sharedTool;
 //網(wǎng)絡(luò)請求方法
- (void)requestWithURL:(NSString *)url parameters: (NSDictionary *)parameters method: (NSString *)method callBack: (void(^)(id responseObject))callBack;
@end

.m文件--分兩種方法實現(xiàn)

1.先來個普通的實現(xiàn)方法

#import "NetworkTool.h"
@implementation NetworkTool
//單例實現(xiàn)
+ (instancetype)sharedTool{
static id instance = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
    instance = [[self alloc]init];
});
return instance;
}

-(void)requestWithURL:(NSString *)url parameters:(NSDictionary *)parameters method:(NSString *)method callBack:(void (^)(id))callBack{
 //判斷發(fā)送的是什么請求
 //GET請求
   if([method isEqualToString:@"GET"]) {
    [self GET:url parameters:parameters progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        callBack(responseObject);
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        NSLog(@"%@",error);
    }];
   }
    //POST請求
    if ([method isEqualToString:@"POST"]) {
        [self POST:url parameters:parameters progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
            callBack(responseObject);
        } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
            NSLog(@"%@",error);
        }];
    }
}
@end

2.參考到AFN內(nèi)部POST,GET等請求都是用同一個方法實現(xiàn)：dataTaskWithHTTPMethod，我們來封裝一下

• 由于AFN內(nèi)部的dataTaskWithHTTPMethod方法時私有的，我們?nèi)绻蛔鎏幚碓谶@里無法使用的
• 如何使用父類的私有方法？---利用OC運行時，當發(fā)送消息調(diào)用方法時在本類中找不到該方法，則會去父類中調(diào)用

     #import "NetworkTool.h"
     //1.創(chuàng)建協(xié)議，聲明協(xié)議方法，把AFN內(nèi)部的實現(xiàn)方法復制過來
     @protocol OCNetworkToolProtocol <NSObject>
     - (NSURLSessionDataTask  *)dataTaskWithHTTPMethod:(NSString *)method
                                   URLString:(NSString *)URLString
                                  parameters:(id)parameters
                              uploadProgress:(nullable void (^)(NSProgress *uploadProgress)) uploadProgress
                            downloadProgress:(nullable void (^)(NSProgress *downloadProgress)) downloadProgress
                                     success:(void (^)(NSURLSessionDataTask *, id))success
                                     failure:(void (^)(NSURLSessionDataTask *, NSError *))failure;
     @end

     //2.遵守協(xié)議
     @interface NetworkTool()<OCNetworkToolProtocol>
     @end
      //然后就可以調(diào)用了
     @implementation NetworkTool
     //單例實現(xiàn)
     + (instancetype)sharedTool{
     static id instance = nil;
     static dispatch_once_t onceToken;
     dispatch_once(&onceToken, ^{
     instance = [[self alloc]init];
     });
     return instance;
     }

     -(void)requestWithURL:(NSString *)url parameters:(NSDictionary *)parameters method:(NSString *)method callBack:(void (^)(id))callBack{
     //如果使用父類的dataTask方法（由于是父類的私有方法，所以調(diào)用不了，這時要使用代理），則不用判斷
     NSURLSessionDataTask *dataTask = [self dataTaskWithHTTPMethod:method URLString:url parameters:parameters uploadProgress:nil downloadProgress:nil success:^(NSURLSessionDataTask *task, id responseObject) {
        callBack(responseObject);
        } failure:^(NSURLSessionDataTask *task, NSError *error) {
        NSLog(@"%@",error);
       }];

• 使用哪種看個人愛好，目的都是一樣的。

Swift語言封裝AFN網(wǎng)絡(luò)請求工具

• 創(chuàng)建類繼承AFHTTPSessionManager

import Foundation
class SwiftNetworkTool: AFHTTPSessionManager {
//創(chuàng)建單例
static let shared = SwiftNetworkTool()
//網(wǎng)絡(luò)工具方法
func reqeust(url: String, paramaters: [String: Any]? = nil, method: String, callBack:@escaping (_ responseObject:Any?)->()){
    
    //抽取請求成功和失敗的閉包
    let success = {
        (task: URLSessionDataTask, responseObject: Any?) in callBack(responseObject)
    }
    let failure = {
        (task: URLSessionDataTask?,error: Error) in
        callBack(nil)
    }
    
    //GET請求網(wǎng)絡(luò)數(shù)據(jù)
    if method == "GET" {
        self.get(url, parameters: paramaters, progress: nil, success: success, failure: failure)
    }
    //POST請求網(wǎng)絡(luò)數(shù)據(jù)
    if method == "POST" {
        self.post(url, parameters: paramaters, progress: nil, success: success, failure: failure)
    }   
} 
}