I'm developing an iPhone app. I'm using a UITable subclassing UITableViewController. I added a NavigationBar to the view: UINavigationBar *navBar = [[UINavigationBar alloc] initWithFrame: CGRectMake(0.0f, 0.0f, 320.0f, 48.0f)];[self.tableView addSubview:navBar];, now the problem is that the navigation bar scroll down with the table and it's what I want to avoid. Is possible to avoid it using the UITableViewController?
You say
I'm using a UITable subclassing UITableViewController
I guess you are using a subclassed UITableViewController which, naturally, holds a UITableView.
Your problem is caused by the fact, that you inserted the NavigationBar into the UITableView, or, more precisely, into the UIScrollView which is part of the TableView.
Depending on your needs, you have two options:
If you want your app to behave like e.g. Mail (so your TableView will be just one element in a structure of views, through which you can dig down), you should a UINavigationcontroller and make your TableViewController the NavigationController's first view, like when you open the "Navigation based"-Template in Xcode. The UINavigationcontroller will already contain a UINavigationBar, so there isn't much you have to worry about.
If, for some reason, that's not what you want, you will have to create a UIView which holds your UINavigationBar as well as the UITableView. Since accomplishing such a setup with a UITableViewController is known to be rather difficult, you might want to ditch your TableViewController and replace it with a simple ViewController, which implements both the "UITableViewDelegate"- and "UITableViewDataSource"-Delegate. See this post for further help.
Related
I have UINavigationController with UITableViewController as the root view controller. UINavigationController has a an optional UIToolBar, but I want to have a UITabBar instead. I don't need a UITabBarControllerbecause I don't want selecting tab bar items to change the view, just the contents of the same view. My app is a basic RSS reader which displays the items in the table view and I want to use the UITabBar to select from 2 or 3 different RSS feeds, refreshing the existing table view in the process, not switching to a different table view.
If I add a UITabBar manually to the UITableViewController (as it seems impossible to do this form IB) it is anchored to the last cell in the table view, so not only is it not usually visible, but it also moves around. I can't seem to find any way to do what I want.
The solution will probably be to use a UIViewController instead of a UITableViewController. This way you can have both a UITabBar and a UITableView, both subviews of your view controller's view.
The UITableViewController class reference describes exactly what behavior UITableViewController provides over a plain UIViewController (such as being the delegate and data source, deselecting rows, etc.) — you should implement all this this so everything works as it should.
You can make the UITableViewController a UIViewController <UITableViewDelegate, UITableViewDataSource>, and then hook it up in a nib with your TabBar. You can find the UITableViewDelegate protocols here. Hope that helps!
I have a Custom TabViewController that adds subviews to the current view depending on what UITabBarItem is selected. For the different subviews I have simulated a Navigation Bar and a Tab Bar so that the sub views match the format when they are displayed. The one sub view, which contains a UILabel, displays fine however the sub view with the UITableView overlaps the UITabBar. However in the Interface Builder I have sized the UITableView to not cut off the UITabBar.
Adding the subview in the TabViewController
[self.view addSubview:subViewController.view];
You haven't provided enough information to be sure, but I think you are adding the table view to the wrong view. Assuming that self is your UITabBarController subclass, you are adding the custom view in the view that covers the entire screen, including the tab bar.
Instead, you should be adding the custom views to the selected view controller's view:
[self.selectedViewController.view addSubview:subViewController.view];
This will limit the stuff you are adding to the tab bar controller's content area, and won't overlap the tab bar.
I'm not sure what you are trying to accomplish with this approach, though: it seems like it would make more sense to add subViewController to the set of view controllers that the UITabBarController manages, rather than messing around with the view hierarchy.
Also, there is nothing inherently wrong with loading views from a nib and then manipulating them in code. "Mixing styles" is not a problem.
As Legolas stated, it seems like you are mixing styles here. Given that it sounds like you need to push it from the code, you could try full instantiation of the object from the code, for example:
UITableView *table = [[UITableView alloc] initWithFrame:CGRectMake(x, y, width, height)];
table.delegate = self; //or whatever the delegate is
table.dataSource = self; //or wherever the datasource is
...then add it to whatever view you need to.
If that all fails, double check your nib and make sure you have the proper options set for whether a tab bar is being shown, nav bar, etc, as that will effect the size.
I am trying to use the UINavigationController object's built-in UIToolbar object in my iPad application, but I want it to be displayed on top of the view instead of the bottom, which is where it defaults.
I am also hiding the UINavigationController object's Navigation Bar.
In order to make this work, I had to write the following code:
navigationController.navigationBarHidden = YES;
navigationController.toolbarHidden = NO;
navigationController.toolbar.frame = CGRectMake(0, 0, 768, 44);
This solution works with one exception: when the application Enters Background and Becomes Active again, the Toolbar is always repositioned on the bottom of the view.
I've tried moving the code from viewDidLoad to viewDidAppear:animated, and it still behaves this way.
First, is there any better way to approach this, and if not, how can I stop the Toolbar from being repositioned?
I've also instead decided to use my own UIToolbar object and add it to each view via a custom Base UIViewController class' viewDidLoad. However, this causes the Toolbar to animate when each view is pushed or popped because it is actually part of the view, which just seems "hokey".
Any ideas on possible solutions?
Thanks everyone!
It says in the documentation under UINavigationController's toolbar property that:
Access to this toolbar is provided solely for clients that want to present an action sheet from the toolbar. You should not modify the UIToolbar object directly.
This is sort of hackish, but you could make a UIToolbar yourself and add it directly to the window (i.e. over the navigation controller.)
You can use the category below to modify the UIToolbar class to achieve what you're after.
#implementation UIToolbar (setCenter)
-(void)setCenter:(CGPoint)center
[super setCenter:CGPointMake(384, 22)];
}
#end
The toolbar has limited functionality when used with a UINavigationController. It only provides a convenient way to manage the actionsheet in the toolbar.
From the docs: "Access to this toolbar is provided solely for clients that want to present an action sheet from the toolbar. You should not modify the UIToolbar object directly."
The solution I would use is to create a subclass of UIView with convenience methods to manage your actionsheet and any other custom functionality you need. This custom view can be shared across all views in the UINavigationController and placed where ever you like in the parent view. This will give you ultimate control of your custom top placed toolbar.
I'm working on an app that has three table view controllers in a navigation stack. The root view controller and the second VC have toolbars, but I want to add a subview to the second view controller like this. (The color is just there for visualization.)
I want to add the view programmatically, since I haven't been able to do it with IB without major headaches. Right now, I've been able to kind of get what I want by drawing a UIView in the second view controller like this:
- (void)viewDidLoad {
[super viewDidLoad]
UIView *detailView = [[UIView alloc] initWithFrame:CGRectMake(0, 392, 320, 44)];
detailView = [UIColor redColor];
[self.navigationController.view addSubview:detailView];
[detailView release];
}
The problem with this approach is that once the UIView is loaded in the second view controller, it stays loaded and is drawn in the third and root view controllers. I've tried a variety of methods of removing the UIView, including setting the detailView to nil in viewDidUnload, calling removeFromSuperview in didSelectRowAtIndexPath (which removed the view from the whole stack).
I've also tried adding the subview to self.view, but that pushes it below the visible area of the table view, so I have to scroll up to see it, and it snaps back down when I let go.
Clearly, adding this subview to the navigation controller is not the best way to do what I want, but I'm at a loss as to where to go from here.
As you've already discovered, you definitely should not be reaching up into the navigation controller's view.
You want your SecondViewController to be an UIViewController that implements the UITableViewDelegate and UITableViewDataSource and whose view lays out the UITableView and the UIView you wish to use for your stationary 'footer' in it's own main UIView.
It helps to keep in mind that UITableViewController is ultimately is just a convenience for creating a view controller whose view consists entirely of a UITableView.
Anyway, rather than attempt to put a pile of that code inline in this answer, you can browse it (or svn co) from this read-only svn repo.
EDITED (now that it's not midnight, putting some code/explanation directly in answer):
For the controller to be pushed onto the nav stack that needs the footer create a new UIViewController-based class (do NOT check the 'UITableViewController subclass' box in the template selection dialog).
Add instance variables for the UITableView and the UIView that is to be the extra bottom view.
#interface SecondViewController : UIViewController <UITableViewDelegate, UITableViewDataSource> {
UITableView* tableView;
UIView* customFooterView;
}
#property (nonatomic,retain) IBOutlet UITableView* tableView;
#property (nonatomic,retain) IBOutlet UIView* customFooterView;
#end
In IB add a UITableView and UIView to the existing root view for the controller and lay them out as desired (probably worth altering the auto-resize parameters too if your app can be used in both landscape and portrait). Hook up the two views to the outlets defined for them in the "File's Owner" and also ensure you hook up the UITableView's delegate and dataSource properties to point at the "File's Owner."
Then just implement the UITableViewDelegate and UITableViewDataSource protocols as appropriate for your application.
If you want to lay out the entire 'footer' view in IB then go right ahead. Otherwise you can easily add items programmatically in viewDidLoad (and remember to tear it down in viewDidUnload).
I don't like the approach. You should put your table view inside another view, and put your detail view together in that view.
Despite of that, I think you can remove your view in viewWillDisappear method of your view controller. I also notice that you did not keep your detailView as a private variable, which you should do because you need to reference it when removing it later (I still wonder how you have done it.)
Note that viewDidUnload is called in case of view unloading (i.e. releasing from its controller), so it is not related to navigation.
Not sure which behavior you're looking for but try one of these:
Assign the detailView to the tableFooterView property of the tableview on the second VC.
Reduce the height of the table view and add the detailView to self.view.
I wanted to add a view to the bottom of my screen. The controller is a UITableViewController, how do I shrink the tableView and add a extra view at the bottom of the tableview?
I've tried setting the frame of self.tableView in different places (viewDidLoad, viewWillAppear etc) but nothing happens. The tableView is created by IB and not programtically.
I've tried added a footer to my table view but that's not what I want, because the footer actually scrolls up, I want a static non moving View at the bottom of the screen.
I'm not saying you can't do it otherwise, but you may not want a UITableViewController for this situation. You can still have your view controller implement UITableViewDelegate and UITableViewDataSource, but place a vanilla UIView in your nib, into which you place a UITableView. Then just make sure to set the view outlet to the UIView containing your table. This has the effect of allowing you to create your additional view within IB. I just tried this and it appeared to work.
I'm guessing you're using a UINavigationController. When you push a controller onto your navigation stack, UINavigationController resizes its view to full screen, ignoring the geometry and autoresizing behavior you've defined in IB.
This resizing seems to happen after viewWillAppear:. In the past I've had some success resizing a table view and adding a sibling view in viewDidAppear:, after calling [super viewDidAppear:]. This is a bit risky though, since Apple could break it by changing how UINavigationController works behind the scenes.
A safer option is to push a view controller onto your navigation stack that controls a wrapper view. Then add your UITableView and its sibling as subviews of that wrapper view. The annoying thing about this option is that you'll probably want to use a nested UITableViewController to manage your non-full screen table view, but the documentation for UIViewController says it's designed to manage full screen views only. If you decide to ignore this admonition and nest your view controllers anyway, you'll find that viewWill/DidAppear/Disappear don't get called on the nested controller, so you'll have to manually delegate those methods from your wrapper view controller. This lack of support for nested controllers is one of my biggest pet peeves about UIKit, and I've gone to great lengths to engineer around it.
If you want to toe the line and use view controllers only for full screen views, you can push a normal view controller that controls your full screen wrapper view, manually implement all the UITableViewDataSource and UITableViewDelegate methods in your view controller, and set it as the delegate for your table view.
you want to change the -loadView method. Not viewDidLoad or viewWillAppear. This will allow you to make additional configurations with your tableview even if it is created in IB.
- (void)loadView {
[super loadView];
CGRect titleRect = CGRectMake(0, 0, 300, 40);
UILabel *tableTitle = [[UILabel alloc] initWithFrame:titleRect];
tableTitle.textColor = [UIColor blueColor];
tableTitle.backgroundColor = [self.tableView backgroundColor];
tableTitle.opaque = YES;
tableTitle.font = [UIFont boldSystemFontOfSize:18];
tableTitle.text = [curTrail objectForKey:#"Name"];
self.tableView.tableHeaderView = tableTitle;
[self.tableView reloadData];
[tableTitle release];
}
I don't know how to do it in IB but the way to do it in code is with this:
- (void) loadView
{
UITableView *tv = [[UITableView alloc] initWithFrame: rect
style: UITableViewStyleGrouped];
// finishg configuring table view
self.view = tv;
[tv release];
}
Trying to do it in two stages -- style first and then frame or frame first and then style -- neither of them works.