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网络层方法封装

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网络层的方法封装

特点

  • 集成AFNetworking
  • 集成MJExtension
  • 统一回调
  • 方便顶层调用
  • 统一错误处理
  • 适应接口设计

设计（以POST和退出登录接口举例）

  1. 接口设计
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    typedef void (^DKResponseBlock)(DKResponse *response);

    + (void)POST:(nonnull NSString *)URLString parameters:(nullable id)parameters success:(nonnull DKResponseBlock)callBack;
    1.1 DKResponse 回调模型设计（根据接口进行设计）


     #import <Foundation/Foundation.h>

    @interface DKResponse : NSObject

    /** state */
    @property (nonatomic,copy) NSString *state;

    /** result */
    @property (nonatomic,copy) NSDictionary *result;

    /** message */
    @property (nonatomic,copy) NSString *message;

    /** 纯数据 */
    @property (nonatomic, strong) id rawData;

    /** error */
    @property (nonatomic,copy) NSError *error;

    @end
  2. 底层方法实现
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    (DKConfiguration.h 或者使用 plist)
     static NSString *kDKTimeoutInterval = 10.0f;
     static NSString *kDKSuccessMessage = @"success";

    + (void)POST:(nonnull NSString *)URLString parameters:(nullable id)parameters callBack:(nonnull DKResponseBlock)callBack {
        AFHTTPSessionManager *mgr = [AFHTTPSessionManager manager];
        mgr.requestSerializer.timeoutInterval = kDKTimeoutInterval;
        [mgr POST:URLString parameters:parameters progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
            DKResponse *resp = [DKResponse mj_objectWithKeyValues:responseObject]; // 转为响应信息模型
            resp.rawData = responseObject; // 储存源数据
            if(callBack){
                if (![resp.message isEqualToString:kDKSuccessMessage]) { // 判断是否是成功的
                    resp.error = [NSError errorWithDomain:@"dankal.cn" code:[resp.state integerValue] userInfo:@{@"message":resp.message}]; // 生成错误对象
                    callBack(resp);
                }else{
                    callBack(resp); // 没有错误直接返回
                }
            }

        } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
            DKLog(@"%@",error);
            DKResponse *response = [[DKResponse alloc] init]; // 随便看看
            response.error = error;
            if(callBack){
                callBack(response);
            }
        }];
    }
  3. 业务层接口设计
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    (DKLogin.h)
    typedef void (^DKBlockSuccessOrError)(BOOL isSuccessful,NSError *error);
    // 其他需求可以定制其他回调，如下
    typedef void (^DKArrayResultBlock)(NSArray *result,NSError *error);
    typedef void (^DKIntegerResultBlock)(NSInteger number, NSError *error) ;
    typedef void (^DKUserResultBlock)(DKUser *user, NSError *error); // DKUser为模型

    + (void)logout:(DKBlockSuccessOrError)callBack;
  4. 业务层接口实现
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    + (void)logout:(DKBlockSuccessOrError)callBack
    {
        NSString *url = @"xxxx";
        NSDictionary *params = @{@"xxx":@"xxx"};
        [DKHTTPTool POST:url parameters:params success:^(DKResponse *response) {
            if (callBack) {
              response.error ? callBack(NO,response.error) : callBack(YES,nil);
            }
         }];
     }
  5. ViewModel 或 ViewController 调用
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    [DKLoginService logout:^(BOOL isSuccess,NSError *error){
        if(isSuccess){

        }else{

        }
    }];