uinavigationbar

问题 I have two table view controllers. Say TableViewController1 and TableViewController2 . I push TableViewController2 when someone clicks on the TableViewController1 's cell. I set the TableViewController1 's clicked cell's value as the TableViewController2 's back bar button's title value. According to the length of the TableViewController1 cell's string, the back bar button's length also get changing. Is it possible to fix the width of the back bar button? I really need this, because I want to

问题 I have a ModalView called with : PreferencesController *nextWindow = [[[PreferencesController alloc] initWithNibName:@"Preferences" bundle:nil] autorelease]; nextWindow.wantsFullScreenLayout = YES; UINavigationController* navController = [[[UINavigationController alloc] initWithRootViewController:nextWindow] autorelease]; [self presentModalViewController:navController animated:YES]; It is initialised like this : - (void)viewDidLoad { [super viewDidLoad]; self.navigationController

问题 I'm using flask with the following model: class NewsCategory(db.Model): __tablename__ = 'news_category' id = db.Column(db.Integer, primary_key=True) title = db.Column(db.String(64)) parent_id = db.Column(db.Integer, db.ForeignKey('news_category.id')) children = db.relationship("NewsCategory") And I want to create a json object from this model for use in navigation menu. I would like to parse it recursively and build a hierarchical JSON object that looks something like this: tree = [{"title":

问题 Is it possible to reposition a UIBarButtonItem that's in a UINavigationBar horizontally? I've seen the barButtonItem setBackgroundVerticalPositionAdjustment:forBarMetrics: method (but that's for vertical positioning), and I know how to do it if I make it a custom button, but how do I take a UIBarButtonItem with the style UIBarButtonItemStyleBordered and horizontally reposition it (that is, move it left or right)? Thanks in advance! 回答1: You can create a fixed size button as a 'filler' and add

问题 Is it possible to reposition a UIBarButtonItem that's in a UINavigationBar horizontally? I've seen the barButtonItem setBackgroundVerticalPositionAdjustment:forBarMetrics: method (but that's for vertical positioning), and I know how to do it if I make it a custom button, but how do I take a UIBarButtonItem with the style UIBarButtonItemStyleBordered and horizontally reposition it (that is, move it left or right)? Thanks in advance! 回答1: You can create a fixed size button as a 'filler' and add

问题 I hid the navigation bar's shadow using the following trick: self.navigationController?.navigationBar.setBackgroundImage(UIImage(), for: .default) self.navigationController?.navigationBar.shadowImage = UIImage() I also have the following set: self.extendedLayoutIncludesOpaqueBars = true self.automaticallyAdjustsScrollViewInsets = true self.tabBarController?.tabBar.isHidden = true Everything looks fine on my page, except that when I scroll up my tableView it goes under the navigation bar as

问题 I have set up a view with only one UITextView and a UINavigationBar in a xib file. When I run the app, the top part of the text is obscured by the UINavigationBar, even though I lined up the UITextView in IB below the UINavigationBar. It not only happens with UITextViews, also with other type of views, including a simple UILabel. My understanding is that when using a navbar, the top of the views will be shifted down, but this doesn't happen. Am I missing anything in my setup to prevent this?

问题 How can i set the navigation bar to the top in a Table View within storyboard interface builder? Is it possible? If i add a navigation bar to my Table View i get it under my records only! I'm using Xcode 4.3.2 回答1: You should not add the navigation bar yourself. Interface builder will do that automatically when a scene is embedded into a navigation controller or part of the navigation stack. So if your tableview is the root controller choose your scene and then go to: Editor > Embed in >

问题 I've created a custom back button with the code below, however the clickable area is very big and goes well beyond the icon itself. Does anyone know how to set the clickable area, or make it the same size as the image? Thanks UIImage *buttonImage = [UIImage imageNamed:@"prefs"]; UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom]; [button setImage:buttonImage forState:UIControlStateNormal]; button.frame = CGRectMake(0, 0, buttonImage.size.width, buttonImage.size.height); [button

问题 I've been experimenting all day and trying to figure out just how to get my UISearchBar to appear the same in iOS13 as it appears in iOS12/11 So the way the search bar is added is simply a new UISearchController. var searchController = new UISearchController(searchResultsController: null); searchController.SearchBar.Placeholder = "Search"; searchController.SearchResultsUpdater = this; searchController.HidesNavigationBarDuringPresentation = false; searchController