iOS解析Server端返回JSON数据

时间：2022-02-15 09:13:10

在做quhao APP架构时，后台Server端使用了Java，提供WebService，而iOS和Android作为移动客户端。在做数据交互时，Server端返回JSON格式数据。由于iOS SDK中提供的JSON数据解析实在太过麻烦，这里讲下iOS下如何使用SBJson库来解析JSON格式数据。

首先我发起了一个HTTP请求，得到一个response字符串，此字符串是JSON格式：

NSURL *url = [NSURL URLWithString:@"http://192.168.1.2:9081/allCategories"];

    ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:url];

    [request startSynchronous];

    NSError *httpError = [request error];

    NSString *response = @"";

    if (!httpError) {

        response = [request responseString];

//        NSLog(@"%@", response);

    }

返回的数据格式如下：

[{"count":1000,"cateType":"benbangcai"},{"count":478,"cateType":"hanguoliaoli"},{"count":999,"cateType":"huoguo"},{"count":1000,"cateType":"mianbaodangao"},{"count":998,"cateType":"ribenliaoli"},{"count":1000,"cateType":"tianpinyinpin"},{"count":584,"cateType":"xiangcai"},{"count":999,"cateType":"chuancai"},{"count":260,"cateType":"dongnanyacai"},{"count":311,"cateType":"haixian"},{"count":1000,"cateType":"shaokao"},{"count":984,"cateType":"xiaochikuaican"},{"count":999,"cateType":"xican"},{"count":210,"cateType":"*qingzhen"},{"count":771,"cateType":"yuecaiguan"},{"count":1000,"cateType":"zhongcancaixi"},{"count":316,"cateType":"zizhucan"}]

我们可以看到JSON数据格式是非常整齐的，下面我们就使用SBJson来解析每一个数据块的2个值：count和cateType。

// 解析Server端返回的JSON数据

    SBJsonParser *jsonParser = [[SBJsonParser alloc] init]; //初始化SBJsonParser

    NSError *error = nil;

    NSArray *jsonObjects = [jsonParser objectWithString:response error:&error];

    [jsonParser release], jsonParser = nil;

    for (NSDictionary *dict in jsonObjects) {

        NSString *value1 = [dict objectForKey:@"cateType"];

        NSString *value2 = [dict objectForKey:@"count"];

        NSLog(@" value1 is : %@", value1);

        NSLog(@" value2 is : %@", value2);

    }

运行后打印结果：

2013-07-23 21:16:28.962 quhaoIOS[832:c07]  value1 is : benbangcai

2013-07-23 21:16:28.962 quhaoIOS[832:c07]  value2 is : 1000

2013-07-23 21:16:28.963 quhaoIOS[832:c07]  value1 is : hanguoliaoli

2013-07-23 21:16:28.963 quhaoIOS[832:c07]  value2 is : 478

2013-07-23 21:16:28.963 quhaoIOS[832:c07]  value1 is : huoguo

2013-07-23 21:16:28.963 quhaoIOS[832:c07]  value2 is : 999

2013-07-23 21:16:28.964 quhaoIOS[832:c07]  value1 is : mianbaodangao

2013-07-23 21:16:28.964 quhaoIOS[832:c07]  value2 is : 1000

2013-07-23 21:16:28.964 quhaoIOS[832:c07]  value1 is : ribenliaoli

2013-07-23 21:16:28.964 quhaoIOS[832:c07]  value2 is : 998

2013-07-23 21:16:28.965 quhaoIOS[832:c07]  value1 is : tianpinyinpin

2013-07-23 21:16:28.965 quhaoIOS[832:c07]  value2 is : 1000

2013-07-23 21:16:28.965 quhaoIOS[832:c07]  value1 is : xiangcai

2013-07-23 21:16:28.966 quhaoIOS[832:c07]  value2 is : 584

2013-07-23 21:16:28.966 quhaoIOS[832:c07]  value1 is : chuancai

2013-07-23 21:16:28.966 quhaoIOS[832:c07]  value2 is : 999

2013-07-23 21:16:28.966 quhaoIOS[832:c07]  value1 is : dongnanyacai

2013-07-23 21:16:28.967 quhaoIOS[832:c07]  value2 is : 260

2013-07-23 21:16:28.967 quhaoIOS[832:c07]  value1 is : haixian

2013-07-23 21:16:28.967 quhaoIOS[832:c07]  value2 is : 311

2013-07-23 21:16:28.967 quhaoIOS[832:c07]  value1 is : shaokao

2013-07-23 21:16:28.968 quhaoIOS[832:c07]  value2 is : 1000

2013-07-23 21:16:28.968 quhaoIOS[832:c07]  value1 is : xiaochikuaican

2013-07-23 21:16:28.968 quhaoIOS[832:c07]  value2 is : 984

2013-07-23 21:16:28.969 quhaoIOS[832:c07]  value1 is : xican

2013-07-23 21:16:28.969 quhaoIOS[832:c07]  value2 is : 999

2013-07-23 21:16:28.969 quhaoIOS[832:c07]  value1 is : *qingzhen

2013-07-23 21:16:28.969 quhaoIOS[832:c07]  value2 is : 210

2013-07-23 21:16:28.970 quhaoIOS[832:c07]  value1 is : yuecaiguan

2013-07-23 21:16:28.970 quhaoIOS[832:c07]  value2 is : 771

2013-07-23 21:16:28.970 quhaoIOS[832:c07]  value1 is : zhongcancaixi

2013-07-23 21:16:28.970 quhaoIOS[832:c07]  value2 is : 1000

2013-07-23 21:16:28.971 quhaoIOS[832:c07]  value1 is : zizhucan

2013-07-23 21:16:28.971 quhaoIOS[832:c07]  value2 is : 316
 
 

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