url

 NSString *string1=@"http://iosseventeenclass.sinaapp.com/index.php?name=林&age=25";        string1 =[string1 stringByAddingPercentEscapesUsingEncoding:4];//编码        NSURL *url=[NSURL URLWithString:string1];        NSData *data=[NSData dataWithContentsOfURL:url];        NSString *string=[[NSString alloc]initWithData:data encoding:4];//4表示中文编码:UTF8        NSLog(@"%@",string);        在OC中将URL字符串转换成NSURL时，其协议、主机域名、路径文件、查询条件都被封装成NSURL类中的属性，如下示： NSLog(@"url absoluteString = %@",url.absoluteString);     NSLog(@"url relativeString = %@",url.relativeString);     NSLog(@"url scheme = %@",url.scheme);     NSLog(@"url resourceSpecifier = %@",url.resourceSpecifier);     NSLog(@"url host = %@",url.host);     NSLog(@"url port = %@",url.port);     NSLog(@"url user = %@",url.user);     NSLog(@"url password = %@",url.password);     NSLog(@"url query = %@",url.query);