UIPopoverController中的UINavigationController:设置标题

Question

我正在尝试显示UINavigationController内部a UIPopoverController,但由于某种原因我无法设置标题.

SearchViewController *searchView = [[[SearchViewController alloc] init] autorelease];

UIPopoverController *popover = [[UIPopoverController alloc] initWithContentViewController:searchView];
[popover presentPopoverFromBarButtonItem:_searchBarButton permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];

我尝试过改变它 - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
    // Change the title
    UILabel *label = [[[UILabel alloc] initWithFrame:CGRectZero] autorelease];
    label.backgroundColor = [UIColor clearColor];
    label.font = [UIFont boldSystemFontOfSize:20.0];
    label.shadowColor = [UIColor colorWithWhite:0.0 alpha:0.5];
    label.textAlignment = UITextAlignmentCenter;
    label.textColor = [UIColor whiteColor];
    label.text = @"Print / Email";
    [label sizeToFit];
    self.navigationItem.titleView = label;
}
return self;
}

我也尝试过设置它 - (void)viewDidLoad

- (void)viewDidLoad
{
[super viewDidLoad];

self.contentSizeForViewInPopover = CGSizeMake(320.0, 250.0f);

self.navigationItem.title = @"Print / Email";
self.title = @"Print / Email";
}

但在任何情况下标题都没有用,我还在做错吗？

Answer 1

编辑在UINavigationController广告中添加您的SearchViewController控制器,在UIPopoverController中,如下所示:

SearchViewController *searchView = [[[SearchViewController alloc] init] autorelease];
UINavigationController *navController = [[UINavigationController alloc]initWithRootViewController:searchView];
UIPopoverController *popover = [[UIPopoverController alloc] initWithContentViewController:navController];
[popover presentPopoverFromBarButtonItem:_searchBarButton permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];

现在在SearchViewController的viewDidLoad方法中:

- (void)viewDidLoad
{
  [super viewDidLoad];
  self.title = @"Print / Email";
}

请参阅uipopovercontroller的设置标题