视图标记返回0值

Question

我的iPad iOS项目中的标签值面临着奇怪的问题

我在界面构建器

中给出了我的视图的不同子视图标签1,2,3,4,5 ....

但是当我试图动态获取标记值时，它会给我0值。

NSArray *pSubviews = [self.view subviews];

    // Enumerate the portrait view
    for (int sv = 0; sv < [pSubviews count]; sv++)
    {

        UIView *pObject = (id)[pSubviews objectAtIndex : sv];
        NSLog(@"tag %d",pObject.tag);
    }

结果

2016-05-07 22:12:58.832[1562:47169] tag 0
2016-05-07 22:12:58.832[1562:47169] tag 0
2016-05-07 22:12:58.832[1562:47169] tag 0
2016-05-07 22:12:58.832[1562:47169] tag 0
2016-05-07 22:12:58.832[1562:47169] tag 0
2016-05-07 22:12:58.832[1562:47169] tag 0

我在app delegate启动方法中为iPad视图动态设置我的视图。

 myViewController *ldVC;
    if (IS_IPAD)
    {
        ldVC = [[myViewController alloc]initWithNibName:@"myViewController_iPad" bundle:[NSBundle mainBundle]];

    }
    else
    {
        ldVC = [[myViewController alloc]initWithNibName:@"myViewController" bundle:nil];

    }
    UINavigationController *navVC = [[UINavigationController alloc]initWithRootViewController:ldVC];
    self.window.rootViewController=navVC;

查看层次结构::

Answer 1

如果您在viewDidLoad方法中运行此视图，则视图可能尚未设置。尝试在viewDidLayoutSubviews

中运行它