【iOS】将网络请求封装在一个单例类Manager中（AFNetworking、JSONModel）

项目开发中会请求大量不同的API，若将网络请求三板斧直接写在Controller中会代码十分冗杂，干脆直接将AFNetWorking和JSONModel封装到一个全局的Manager单例类中，在Manager类中进行网络请求和数据解析

导入AFNetworking和JSONModel

参考【iOS】AFNetworking的基本使用

创建一个单例类Manager

Manager.h

代码块Block用于传值

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

typedef void(^SuccessBlock)(TestModel* testModel);
typedef void(^ErrorBlock)(NSError* error);

@interface Manager : NSObject

+ (instancetype)sharedManager;

- (void)sendRequestWithURL: (NSString *)urlString success: (SuccessBlock)success failure: (ErrorBlock)failure;

@end

Manager.m

这里使用GCD方法实现简单的单例模式

#import "Manager.h"
#import "AFNetworking.h"

static Manager* manager = nil;

@implementation Manager

+ (instancetype)sharedManager {
    if (!manager) {
        static dispatch_once_t onceToken;
        dispatch_once(&onceToken, ^{
            manager = [[Manager alloc] init];
        });
    }
    
    return manager;
}

- (void)sendRequestWithURL:(NSString *)urlString success:(SuccessBlock)success failure:(ErrorBlock)failure {
    
    [[AFHTTPSessionManager manager] GET: urlString parameters: nil headers: nil progress: nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        if (success) {
            TestModel* testModel = [[TestModel alloc] initWithDictionary: responseObject error: nil];
            success(testModel);
        }
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        if (failure) {
            failure(error);
        }
    }];
}

@end

Manager的使用

- (void)requestTest {
    [[Manager sharedManager] sendRequestWithURL: @"https://news-at.zhihu.com/api/4/news/latest" success:^(TestModel * _Nonnull testModel) {
            NSLog(@"%@", testModel.stories[0]);
        } failure:^(NSError * _Nonnull error) {
            if (error) NSLog(@"请求失败");
        }];
}