iOS开发使用NSJSONSerialization、JSONKit、SBJson、TouchJson四种方式解析Json数据

 

概括：JSON数据解析可以使用苹果自带的NSJSONSerialization方式，也可以使用第三方框架，比如JSONKit、SBJson、TouchJSON等，框架的使用方式比较简单，但性能比ios原生方式差很多，建议使用原生方式。

 

 

---

1 NSJSONSerialization，IOS原生

 

/**

 *  解析JSON数据

 */

-(void) analysisJSON{

    // 获取URL

    NSURL *url = [[NSURL alloc] initWithString:@"http://localhost:8070/MJServer/video"];

    

    // 获取session的实例

    NSURLSession *session = [NSURLSession sharedSession];

    

    // 创建一个数据访问任务

    NSURLSessionDataTask *task = [session dataTaskWithURL:url completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {

        // 如果访问错误

        if (error || data == nil) {

            NSLog(@"网络繁忙，请稍后再试");

            return;

        }

        

        // 解析JSON数据，预先知道json数据的结构

        NSDictionary *result = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];

        NSArray *videos = result[@"videos"];

        for (NSDictionary *dict in videos) {

            NSLog(@"videoID -- %@", dict[@"id"]);

            NSLog(@"videoName -- %@", dict[@"name"]);

            NSLog(@"videoURL -- %@", dict[@"url"]);

            printf("\n----------------华丽丽的分割线-----------------\n");

        }

    }];

    

    [task resume];

}

  

2 JSONKit,需要导入#import "JSONKit.h"，并且要添加libz.dylib动态库

/**

 *  JSONKit

 */

- (IBAction)jsonkit {

    NSLog(@"jsonkit");

    

    NSDictionary *weatherInfo = [[self weatherData] objectFromJSONData];

    

    self.jsonData.text = [self weatherFormat:weatherInfo];

}

 

3 SBJson，需要导入#import "SBJson/SBJson.h" 

/**

 *  SBJson

 */

- (IBAction)sbjson {

    NSLog(@"sbjson");

    

    NSURL *url = [[NSURL alloc] initWithString:@"http://www.weather.com.cn/data/cityinfo/101010100.html"];

    NSString *responseString = [NSString stringWithContentsOfURL:url encoding:NSUTF8StringEncoding error:nil];

    

    // 创建SBJson分析对象

    SBJsonParser *parser = [[SBJsonParser alloc] init];

    // 从json数据中获取字典

    NSDictionary *weatherInfo = [parser objectWithString:responseString];

    

    

    self.jsonData.text = [self weatherFormat:weatherInfo];

}

 

4 TouchJson，需要导入#import "TouchJson/JSON/CJSONDeserializer.h" 

/**

 *  TouchJson

 */

- (IBAction)touchjson {

    NSLog(@"touchjson");

    

    NSDictionary *weatherInfo = [[CJSONDeserializer deserializer]deserialize:[self weatherData] error:nil];

    

    self.jsonData.text = [self weatherFormat:weatherInfo];

}

2\3\4以天气信息为例，其数据获取方法及格式化方法如下 

/**

 *  获取天气信息

 *

 {

    "weatherinfo": {

    "city": "北京",

    "cityid": "101010100",

    "temp1": "12℃",

    "temp2": "15℃",

    "weather": "小雨",

    "img1": "n7.gif",

    "img2": "d7.gif",

    "ptime": "18:00"

 }

 }

 *  @return json数据

 */

-(NSData *)weatherData{

    NSURL *url = [[NSURL alloc] initWithString:@"http://www.weather.com.cn/data/cityinfo/101010100.html"];

    

    NSURLRequest *request = [NSURLRequest requestWithURL:url];

    

    NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];

    

    NSDictionary *weather = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:nil];

    

    NSLog(@"weather -- %@", weather[@"weatherinfo"]);

    

    return data;

}

 

// 天气格式化

-(NSString *)weatherFormat:(NSDictionary *)weatherInfo{

    

    NSDictionary *weather = weatherInfo[@"weatherinfo"];

    

    NSString *city =weather[@"city"];

    NSString *status =weather[@"weather"];

    NSString *temp1 =weather[@"temp1"];

    NSString *temp2 =weather[@"temp2"];

    NSString *ptime =weather[@"ptime"];

    

    

    return [NSString stringWithFormat:@"天气预报(%@发布)\n%@,%@,气温%@-%@", ptime, city, status, temp1, temp2];

 

}