Uicollection查看ios 6和ios7问题

Question

我在视图中使用tabbar当我设置tabbar高度1000然后集合视图也增加它的大小，当我设置tabbar hiegt 568它就消失了。我不知道如何解决它

当我在ios6中运行应用程序时，还有状态栏问题。如果我的问题非常复杂，那么只需要ping我。我可以提供有关此问题的全部信息。

这是我的代码。

//In View Controller:

     - (void)viewDidLoad
{
    [super viewDidLoad];
    tabbar_obj = [[mytabbar alloc] initWithNibName:@"mytabbar" bundle:nil];

    if([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPad)
    {
        NSLog(@"Ipad ");
    }
    else
    {

        NSLog(@"Iphone %f ",[[UIScreen mainScreen] bounds].size.height);
        if(SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7.0"))
        {
        if ([[UIScreen mainScreen] bounds].size.height == 568) {
            tabbar_obj.view.frame = CGRectMake(0, 0, 320, 568);
            //this is iphone 5 xib

           // tabbar_obj.view.frame = CGRectMake(0, 0, 320, 568);

        } else //if ([[UIScreen mainScreen] bounds].size.height == 480)
        {

            tabbar_obj.view.frame = CGRectMake(0, 0, 320, 568);
            // this is iphone 4 xib
        }
    }
        else if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"6.1"))
        {
            if ([[UIScreen mainScreen] bounds].size.height == 568) {
              //  tabbar_obj.view.frame = CGRectMake(0, 20, 320, 568);
                //this is iphone 5 xib
                [self.view setFrame:CGRectMake(0,0, 320, 568)];
                tabbar_obj.view.frame = CGRectMake(0, 0, 320, 568);

            } else //if ([[UIScreen mainScreen] bounds].size.height == 460)
            {
                [self.view setFrame:CGRectMake(0,0, 320, 480)];
                tabbar_obj.view.frame = CGRectMake(0,0, 320,568);
                // this is iphone 4 xib
            }

        }
    [self.view addSubview:tabbar_obj.view];
    appdel.mytabbar_obj = tabbar_obj;
    }
}