json数据格式原生解析器

来源：互联网发布：金九银十数据编辑：程序博客网时间：2024/05/22 09:40
请求服务器返回数据格式无非就是两种：json和XML，这篇讲解原生如何解析json格式数据
- (void)viewDidLoad{    [super viewDidLoad];    _data = [[NSMutableData alloc]init];    //判断token有没有过期    NSDate *endDate = [USER_D objectForKey:@"endDate"];    NSDate *nowDate = [NSDate date];    //比较现在时间和过去时间  ascend ,上升    if ([nowDate compare:endDate] == NSOrderedAscending)    {        //token没有过期        FriendsListVC *vc = [[FriendsListVC alloc]init];        [self.navigationController pushViewController:vc animated:YES];        [vc release];    }    else    {        //token过期    }}- (IBAction)login:(UIButton *)sender{    NSURL *url = [NSURL URLWithString:@"http://127.0.0.1:8080/st/s"];    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];    NSString *string = [NSString stringWithFormat:@"command=ST_L&name=%@&psw=%@",_nameField.text,_pwdField.text];    NSData *data = [string dataUsingEncoding:NSUTF8StringEncoding];    [request setHTTPBody:data];    [request setHTTPMethod:@"POST"];        NSURLConnection *connetion = [NSURLConnection connectionWithRequest:request delegate:self];    [connetion start];}- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error{    NSLog(@"失败：%@",error);}- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{    [_data setData:[NSData data]];}- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{    [_data appendData:data];}- (void)connectionDidFinishLoading:(NSURLConnection *)connection{    NSString *string = [[NSString alloc]initWithData:_data encoding:NSUTF8StringEncoding];    NSLog(@"%@",string);    NSLog(@"%@",_data);        //NSJSONSerialization JSON解析器    NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:_data options:NSJSONReadingMutableContainers error:nil];    if ([[dic objectForKey:@"result"]integerValue] == 1)    {        //登录成功        //access_token ⽤用户⾝身份验证通过返回的唯⼀一标⽰示⽤用户⾝身份的字段        //将token保存起来，用于之后调用需要登录验证的接口        [USER_D setObject:[dic objectForKey:@"access_token" ] forKey:@"token"];        //计算过期时间        NSDate *nowDate = [NSDate date];        //dateByAddingTimeInterval  计算一个时间点加上一段时间后的时间点        NSDate *endDate = [nowDate dateByAddingTimeInterval:[[dic objectForKey:@"time"] integerValue]];        //存储过期时间        [USER_D setObject:endDate forKey:@"endDate"];        [USER_D synchronize];                FriendsListVC *vc = [[FriendsListVC alloc]init];        [self.navigationController pushViewController:vc animated:YES];        [vc release];    }    else    {        SHOW_ALERT([dic objectForKey:@"error"]);    }        [string release];}- (IBAction)regist:(UIButton *)sender{    RegistVC *vc = [[RegistVC alloc]init];    [self.navigationController pushViewController:vc animated:YES];    [vc release];}
可以和XML格式对比一下
XML数据格式原生解析器
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