iOS 数据请求基础类的实现

@interface AlivcAppServer : NSObject

/**
 get请求的封装
 本应用所有的get请求最终都通过这个方法发起
 @param urlString 请求字符串
 @param handle 请求结果的处理代码块 errString不为空，则代表请求出错
 */
+ (void)getWithUrlString:(NSString *)urlString completionHandler:(void (^)(NSString *__nullable errString,NSDictionary *_Nullable resultDic))handle;


/**
 post请求的封装
 本应用所有的get请求最终都通过这个方法发起
 @param urlString 请求字符串
 @param parametersDic 参数
 @param handle 请求结果的处理代码块 errString不为空，则代表请求出错
 */
+ (void)postWithUrlString:(NSString *)urlString parameters:(NSDictionary *)parametersDic completionHandler:(void (^)(NSString *__nullable errString,NSDictionary *_Nullable resultDic))handle;


/**
 统一处理返回的结果字典
 
 @param resultDic 结果字典
 @param success 结果字典表明请求成功，那么解析出数据字典让别人使用
 @param failure 失败
 */
+ (void)judgmentResultDic:(NSDictionary *)resultDic success:(void (^)(id dataObject))success doFailure:(void (^)(NSString *))failure;

#import 

@implementation AlivcAppServer

// 单例会解决请求类内存泄露的问题
+ (AFHTTPSessionManager*) manager
{
    static dispatch_once_t onceToken;
    static AFHTTPSessionManager *manager = nil;
    dispatch_once(&onceToken, ^{
        manager = [AFHTTPSessionManager manager];
        manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"application/json",@"text/json", @"text/javascript",@"text/html",@"text/plain",nil];
        manager.requestSerializer=[AFHTTPRequestSerializer serializer];
    });
    
    return manager;
}

+ (void)getWithUrlString:(NSString *)urlString completionHandler:(void (^)(NSString * _Nullable, NSDictionary * _Nullable))handle{
    
    [[self manager] GET:urlString parameters:nil progress:^(NSProgress * _Nonnull downloadProgress) {
        
    } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        if ([responseObject isKindOfClass:[NSDictionary class]]) {
            NSDictionary *resultDic = (NSDictionary *)responseObject;
            handle(nil,resultDic);
        }else{
            handle(@"数据格式异常",nil);
        }
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        handle(error.description,nil);
    }];
}

+ (void)postWithUrlString:(NSString *)urlString parameters:(NSDictionary *)parametersDic completionHandler:(void (^)(NSString * _Nullable, NSDictionary * _Nullable))handle{
    
    [[self manager] POST:urlString parameters:parametersDic progress:^(NSProgress * _Nonnull uploadProgress) {
        
    } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        if ([responseObject isKindOfClass:[NSDictionary class]]) {
            NSDictionary *resultDic = (NSDictionary *)responseObject;
            handle(nil,resultDic);
        }else{
            handle(@"数据格式异常",nil);
        }
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        handle(error.description,nil);
    }];
}

/**
 统一处理返回的结果字典
 
 @param resultDic 结果字典
 @param success 结果字典表明请求成功，那么解析出数据字典让别人使用
 @param failure 失败
 */
+ (void)judgmentResultDic:(NSDictionary *)resultDic success:(void (^)(id dataObject))success doFailure:(void (^)(NSString *))failure{
    BOOL isSucess = [resultDic[@"result"] boolValue];
    if (isSucess) {
        id dataObject = resultDic[@"data"];
        success(dataObject);
    }else{
        NSString *messageString = resultDic[@"message"];
        failure(messageString);
    }
}