Question

我是iOS开发中的newBie。我为我的应用程序制作了一个分段控件，我想为每个Scrollview包含不同的WebService数据包含我使用HMSegmented Controll并设置一个scrollview就像它一样

这里我的主视图Controller Contain Code比作

ViewController *latest=[[ViewController alloc]initWithNibName:@"ViewController" bundle:nil];
    [latest.view setFrame:CGRectMake(0, 0, self.view.frame.size.width,self.view.frame.size.height)];
    latest.index=0;
    [self addChildViewController:latest];
    [self.scrollView addSubview:latest.view];

    ViewController *latest2=[[ViewController alloc]initWithNibName:@"NavuViewController" bundle:nil];
    [latest2.view setFrame:CGRectMake(320, 0, self.view.frame.size.width, self.view.frame.size.height)];
    latest2.index=1;
    [self addChildViewController:latest2];
    [self.scrollView addSubview:latest2.view];

    ViewController * latest3 =[[ViewController alloc]initWithNibName:@"NavuViewController" bundle:nil];
    [latest3.view setFrame:CGRectMake(640, 0, self.view.frame.size.width, self.view.frame.size.height)];
    latest3.index=2;
    [self addChildViewController: latest3];
    [self.scrollView addSubview: latest3.view];

然后它包含我想要的不同视图在我的View Controller.h文件中，我将index定义为int Variable

@property (assign) int index;

现在我想从不同的Web服务中获取数据基于索引我在我的ViewController.m文件中编写代码ViewDidLoad方法我写了一个像

的代码

-(void)view
{
[super viewWillAppear:animated];
[self.navuTable deselectRowAtIndexPath:self.navuTable.indexPathForSelectedRow animated:YES];
NSURL *url;
switch (self.index)
{
    case 0:
        url=[NSURL URLWithString:[NSString stringWithFormat:@"http://www.janvajevu.com/webservice/latest_post.php?page=%d",pageNum]];
        break;
    case 1:
    {
        NSString *urlString = @"http://www.janvajevu.com/webservice/categorylist.php?category=%E0%AA%9C%E0%AA%BE%E0%AA%A3%E0%AA%B5%E0%AA%BE%20%E0%AA%9C%E0%AB%87%E0%AA%B5%E0%AB%81%E0%AA%82&page=";

        url = [NSURL URLWithString:[NSString stringWithFormat:@"%@%d",urlString,pageNum]];
    }
        break;
    case 2:

    {
        NSString *urlString = @"http://www.janvajevu.com/webservice/categorylist.php?category=%E0%AA%9F%E0%AB%87%E0%AA%B2%E0%AB%87%E0%AA%A8%E0%AB%8D%E0%AA%9F&page=";

        url= [NSURL URLWithString:[NSString stringWithFormat:@"%@%d",urlString,pageNum]];
    }
        break;
   default:
        break;
}
dispatch_async(kBgQueue, ^{
    data = [NSData dataWithContentsOfURL: url];
    [self performSelectorOnMainThread:@selector(fetchedData:) withObject:data waitUntilDone:YES];
});

-(void)fetchedData:(NSData *)responsedata
{
UIActivityIndicatorView *spinner = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
spinner.frame = CGRectMake(0, 0, 320, 44);
self.navuTable.tableFooterView = spinner;
if (responsedata.length > 0)
{
    NSError* error;
    self.json= [NSJSONSerialization JSONObjectWithData:responsedata options:kNilOptions error:&error];
    if ([[_json objectForKey:@"data"] isKindOfClass:[NSArray class]])
    {
        NSArray *arr = (NSArray *)[_json objectForKey:@"data"];
        [self.navuArray addObjectsFromArray:arr];
        [self.navuTable reloadData];
        [spinner startAnimating];
        NSLog(@"Array %@",self.navuArray);
    }
}

然后是为所有索引加载相同数据意味着仅从第一个索引URL获取数据不同分段控制的不同索引的Mot加载数据请给我解决方案。提前谢谢。

Answer 1

索引始终保持为0，它不是第一项，但初始化时它是默认值。

尝试添加delegate的{{1}}，查看文档并实施Segment：ValueChanged，其中您可以通过{{获取所选索引的值1}}，这将是您应该用来获取不同网址的值。

否则你的代码结构是这么一周，你应该使用storyboard而不是nibs，也许使用干净的代码创建一个Model类，然后连接到你的UI代码。（MVC模式）

希望有所帮助，如果您需要更多帮助，请发布更多数据。祝你好运

所有视图都没有解析JSON数据

1 个答案: