IOS中Json解析的四种方法
2013-11-04 15:41
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1.使用TouchJSon解析方法:(需导入包:#import
"TouchJson/JSON/CJSONDeserializer.h")
//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"]
2.使用SBJson解析方法:(需导入包:#import
"SBJson/SBJson.h")
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)
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")
//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];
"TouchJson/JSON/CJSONDeserializer.h")
//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"]
2.使用SBJson解析方法:(需导入包:#import
"SBJson/SBJson.h")
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)
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")
//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];
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