开源中国iOS客户端学习 (八) 网络通信AFNetworking类库

AFNetworking是一个轻量级的iOS网络通信类库，继ASI类库不在更新之后开发者们有一套不错选择；

AFNetworking类库源码下载和使用教程: https://github.com/AFNetworking/AFNetworking

如果想深入研究有官方文档介绍:http://afnetworking.github.com/AFNetworking/

在开源中国iOS客户端中关于AFNetworking类库的使用只用到了两个实例方法

(1)getPath:parameters:success:failure:

(2)postPath:parameters:success:failure:

他们用法基本相同，只是请求数据方式不同，一种是Get请求和Post请求。Get是向服务器发索取数据的一种请求，也就相当于查询信息功能，不会修改类容，Post是向服务器提交数据的一种请求，影响数据内容；两种方法定义：

- (void)getPath:(NSString *)path
     parameters:(NSDictionary *)parameters
        success:(void (^)(AFHTTPRequestOperation *operation, id responseObject))success
        failure:(void (^)(AFHTTPRequestOperation *operation, NSError *error))failure
{
    NSURLRequest *request = [self requestWithMethod:@"GET" path:path parameters:parameters];
    AFHTTPRequestOperation *operation = [self HTTPRequestOperationWithRequest:request success:success failure:failure];
    [self enqueueHTTPRequestOperation:operation];
}

- (void)postPath:(NSString *)path
      parameters:(NSDictionary *)parameters
         success:(void (^)(AFHTTPRequestOperation *operation, id responseObject))success
         failure:(void (^)(AFHTTPRequestOperation *operation, NSError *error))failure
{
    NSURLRequest *request = [self requestWithMethod:@"POST" path:path parameters:parameters];
    AFHTTPRequestOperation *operation = [self HTTPRequestOperationWithRequest:request success:success failure:failure];
    [self enqueueHTTPRequestOperation:operation];
}

getPath:parameters:success:failure:方法在程序中使用举例:

NewsView.m

- (void)reload:(BOOL)noRefresh
{
    //如果有网络连接
    if ([Config Instance].isNetworkRunning) {
        if (isLoading || isLoadOver) {
            return;
        }
        if (!noRefresh) {
            allCount = 0;
        }
        int pageIndex = allCount/20;
        NSString *url;  

        switch (self.catalog) {
            case 1:
                url = [NSString stringWithFormat:@"%@?catalog=%d&pageIndex=%d&pageSize=%d", api_news_list, 1, pageIndex, 20];
                break;
            case 2:
                url = [NSString stringWithFormat:@"%@?type=latest&pageIndex=%d&pageSize=%d", api_blog_list, pageIndex, 20];
                break;
            case 3:
                url = [NSString stringWithFormat:@"%@?type=recommend&pageIndex=%d&pageSize=%d", api_blog_list, pageIndex, 20];
                break;
        }  

        [[AFOSCClient sharedClient]getPath:url parameters:Nil   

          success:^(AFHTTPRequestOperation *operation, id responseObject) {  

            [Tool getOSCNotice2:operation.responseString];
            isLoading = NO;
            if (!noRefresh) {
                [self clear];
            }  

            @try {
                NSMutableArray *newNews = self.catalog <= 1 ?  

                [Tool readStrNewsArray:operation.responseString andOld: news]:
                [Tool readStrUserBlogsArray:operation.responseString andOld: news];
                int count = [Tool isListOver2:operation.responseString];
                allCount += count;
                if (count < 20)
                {
                    isLoadOver = YES;
                }
                [news addObjectsFromArray:newNews];
                [self.tableNews reloadData];
                [self doneLoadingTableViewData];  

                //如果是第一页 则缓存下来
                if (news.count <= 20) {
                    [Tool saveCache:5 andID:self.catalog andString:operation.responseString];
                }
            }
            @catch (NSException *exception) {
                [NdUncaughtExceptionHandler TakeException:exception];
            }
            @finally {
                [self doneLoadingTableViewData];
            }
        } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
            NSLog(@"新闻列表获取出错");
            //如果是刷新
            [self doneLoadingTableViewData];  

            if ([Config Instance].isNetworkRunning == NO) {
                return;
            }
            isLoading = NO;
            if ([Config Instance].isNetworkRunning) {
                [Tool ToastNotification:@"错误 网络无连接" andView:self.view andLoading:NO andIsBottom:NO];
            }
        }];
        isLoading = YES;
        [self.tableNews reloadData];
    }
    //如果没有网络连接
    else
    {
        NSString *value = [Tool getCache:5 andID:self.catalog];
        if (value) {
            NSMutableArray *newNews = [Tool readStrNewsArray:value andOld:news];
            [self.tableNews reloadData];
            isLoadOver = YES;
            [news addObjectsFromArray:newNews];
            [self.tableNews reloadData];
            [self doneLoadingTableViewData];
        }
    }
}

以上是小编为您精心准备的的内容，在的博客、问答、公众号、人物、课程等栏目也有的相关内容，欢迎继续使用右上角搜索按钮进行搜索afnetworking
， ios afnetworking
， afnetwork
， operation
， ios类库
， success
， parameters
， Self
， failure
jquery_ajax的success
，以便于您获取更多的相关知识。