四种方法解析JSON数据
2016-01-19 21:06
651 查看
(1)使用TouchJSon解析方法:(需导入包:#import "TouchJson/JSON/CJSONDeserializer.h")
(2)使用SBJson解析方法:(需导入包:#import "SBJson/SBJson.h")
(3)使用IOS5自带解析类NSJSONSerialization方法解析:(无需导入包,IOS5支持,低版本IOS不支持)
(4)使用JSONKit的解析方法:(需导入包:#import "JSONKit/JSONKit.h")
//使用TouchJson来解析北京的天气 - (IBAction)btnPressTouchJson:(id)sender { //获取API接口 NSURL *url = [NSURL URLWithString:@"http://m.weather.com.cn/data/101010100.html"]; //定义一个NSError对象,用于捕获错误信息 NSError *error; NSString *jsonString = [NSString stringWithContentsOfURL:url encoding:NSUTF8StringEncoding error:&error]; NSLog(@"jsonString--->%@",jsonString); //将解析得到的内容存放字典中,编码格式为UTF8,防止取值的时候发生乱码 NSDictionary *rootDic = [[CJSONDeserializer deserializer] deserialize:[jsonString dataUsingEncoding:NSUTF8StringEncoding] error:&error]; //因为返回的Json文件有两层,去第二层内容放到字典中去 NSDictionary *weatherInfo = [rootDic objectForKey:@"weatherinfo"]; NSLog(@"weatherInfo--->%@",weatherInfo); //取值打印 txtView.text = [NSString stringWithFormat:@"今天是 %@ %@ %@ 的天气状况是:%@ %@ ",[weatherInfo objectForKey:@"date_y"] ,[weatherInfo objectForKey:@"week"],[weatherInfo objectForKey:@"city"],[weatherInfo objectForKey:@"weather1"] ,[weatherInfo objectForKey:@"temp1"]]; }
(2)使用SBJson解析方法:(需导入包:#import "SBJson/SBJson.h")
//使用SBJson解析南阳的天气 - (IBAction)btnPressSBJson:(id)sender { NSURL *url = [NSURL URLWithString:@"http://m.weather.com.cn/data/101180701.html"]; NSError *error = nil; NSString *jsonString = [NSString stringWithContentsOfURL:url encoding:NSUTF8StringEncoding error:&error]; SBJsonParser *parser = [[SBJsonParser alloc] init]; NSDictionary *rootDic = [parser objectWithString:jsonString error:&error]; NSDictionary *weatherInfo = [rootDic objectForKey:@"weatherinfo"]; txtView.text = [NSString stringWithFormat:@"今天是 %@ %@ %@ 的天气状况是:%@ %@ ",[weatherInfo objectForKey:@"date_y"] ,[weatherInfo objectForKey:@"week"],[weatherInfo objectForKey:@"city"],[weatherInfo objectForKey:@"weather1"] ,[weatherInfo objectForKey:@"temp1"]]; }
(3)使用IOS5自带解析类NSJSONSerialization方法解析:(无需导入包,IOS5支持,低版本IOS不支持)
- (IBAction)btnPressIOS5Json:(id)sender { NSError *error; //加载一个NSURL对象 NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://m.weather.com.cn/data/101180601.html"]]; //将请求的url数据放到NSData对象中 NSData *response = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil]; //IOS5自带解析类NSJSONSerialization从response中解析出数据放到字典中 NSDictionary *weatherDic = [NSJSONSerialization JSONObjectWithData:response options:NSJSONReadingMutableLeaves error:&error]; NSDictionary *weatherInfo = [weatherDic objectForKey:@"weatherinfo"]; txtView.text = [NSString stringWithFormat:@"今天是 %@ %@ %@ 的天气状况是:%@ %@ ",[weatherInfo objectForKey:@"date_y"] ,[weatherInfo objectForKey:@"week"],[weatherInfo objectForKey:@"city"],[weatherInfo objectForKey:@"weather1"] ,[weatherInfo objectForKey:@"temp1"]]; NSLog(@"weatherInfo字典里面的内容为--》%@", weatherDic ); }
(4)使用JSONKit的解析方法:(需导入包:#import "JSONKit/JSONKit.h")
- (void)btnPressJsonKit:(id)sender { //如果json是“单层”的,即value都是字符串、数字,可以使用 objectFromJSONString NSString *json1 = @"{\"a\":123, \"b\":\"abc\"}"; NSLog(@"json1:%@",json1); NSDictionary *data1 = [json1 objectFromJSONString]; NSLog(@"json1.a:%@",[data1 objectForKey:@"a"]); NSLog(@"json1.b:%@",[data1 objectForKey:@"b"]); [json1 release]; //如果json有嵌套,即value里有array、object,如果再使用objectFromJSONString,程序可能会报错 //(测试结果表明:使用由网络或得到的php/json_encode生成的json时会报错,但使用NSString定义的json字符串时,解析成功),最好使用objectFromJSONStringWithParseOptions: NSString *json2 = @"{\"a\":123, \"b\":\"abc\", \"c\":[456, \"hello\"], \"d\":{\"name\":\"张三\", \"age\":\"32\"}}"; NSLog(@"json2:%@", json2); NSDictionary *data2 = [json2 objectFromJSONStringWithParseOptions:JKParseOptionLooseUnicode]; NSLog(@"json2.c:%@", [data2 objectForKey:@"c"]); NSLog(@"json2.d:%@", [data2 objectForKey:@"d"]); [json2 release]; }
相关文章推荐
- jstl中<c:forEach>的用法
- jstl的c标签对集合进行遍历时的版本影响
- 【JS学习笔记】JS基础中:流程控制
- Unescape JavaScript's escape() using C#
- 【JS学习笔记】JS基础上:数据类型
- Jackson将json字符串转换成泛型List
- ExtJS5 - 一个简洁完整的后台管理系统入门实例
- json数组和List转换
- JSON 数据格式
- 对js单线程的理解
- 2016/01/19 javascript学习笔记-name属性
- jsp中显示汉字,引入包,打印时间
- jackson 转json. 过滤null值
- Json解析值get与opt的区别
- js数组遍历
- javascript cookbook: modulization
- 清除WebSphere中jsp缓存
- Drag Validation - 拖动验证-解锁
- json.parse()和json.stringify()
- !!的作用