引入文件#import "SBJson.h" 别忘了所有的SBJson文件后边添加-fno-objc-arc
NSURL *url =[NSURL URLWithString:@"http://www.weather.com.cn/data/cityinfo/101010100.html"];
NSString *jsonStr =[NSString stringWithContentsOfURL:url encoding:NSUTF8StringEncoding error:nil];
NSDictionary *dic =[jsonStr JSONValue];
NSDictionary *dic1 =[dic objectForKey:@"weatherinfo"];
NSLog(@"%@", [dic1 objectForKey:@"city"]);