.Hi,
I have a nib file that contains an header that will be used in most of my views, so that I can change it's layout just once when I need. I'd like to know if it's possible to add the header nib view with interface builder, or if I need to do that programmatically and how should it be done.
I've thought about setting the subclass of the subview to a UIView subclass that automatically loads the nib file.
- (id)initWithFrame:(CGRect)frame {
UIView *cell;
NSArray *nib = [[NSBundle mainBundle] loadNibNamed: #"MainHeaderView"
owner: self
options: nil];
for (id oneObject in nib)
if ([oneObject isKindOfClass: [UIView class]])
cell = (UIView *) oneObject;
if ((self = [super initWithFrame: [cell frame]])) {
// Initialization code
}
return self;
}
But this also doesn't seem to work.
It should work, at least in theory. For that matter, it should be possible (but with rather a lot of effort) to add it via IB, from what used to be called a palette, a long time ago; I believe that option was recreated.
I would say that loading from initWithFrame: is likely not to work. Other possible places to load would be awakeFromNib (with a caveat about multiple nib loadings causing it to be called multiple times), or viewDidLoad. Try moving the load to viewDidLoad, and see if your cell is connected up. You should also be testing for failure to load the nib (nil return).
Ok, I've solved this another way.
I've created the headerView and the controller, and a subclass of UIViewController for all views that needed the header to be displayed, loading them all with the header. Something like this:
#implementation MyDefaultViewController
- (void)viewDidLoad {
[super viewDidLoad];
MyTestAppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
[self.view addSubview: [appDelegate.headerViewController view]];
}
Every view that needs the header to be there will have a controller that's a subclass of MyDefaultViewController. Seems to work, although the fact that I don't specify where to place the header scares me a bit xD
Related
I want to present a modalView (it can be a viewController) that I draw in Storyboard. I don't want to have to make the whole thing programmatically. Is there a way to do this without it being a full screen view?
I guess another way to ask the question is: how do I [self.view addSubView:mySubView] where mySubView is drawn in InterFaceBuilder/Storyboard?
To do this properly, you should look at View Controller containment in the docs. Basically you would addChildViewController after instantiating the viewController from your storyboard and then add the viewController's view to your current view hierarchy.
To just get it working however, the following will get you going:
UIViewController *childViewController = [self.storyboard instantiateViewControllerWithIdentifier:#"<identifier you set in Interface Builder>"];
[self.view addSubView:childViewController.view];
Note that one of the reasons to do it 'properly' will be to ensure that autorotation and presentation callbacks are sent to the sub view controller.
Override the initWithCoder method in the object-c class.
- (id)initWithCoder:(NSCoder *)aDecoder {
if ((self = [super initWithCoder:aDecoder])) {
[self addSubview:[[[NSBundle mainBundle] loadNibNamed:#"MyView" owner:self options:nil] objectAtIndex:0]];
}
return self;
}
I am trying to add a static fixed image to a UITableViewController, but when I do the standard [self.view addSubview:imageView]; the image is placed on the tableview and moves with the scrolling.
Is there any way to do this so that the image stays fixed?
I know one method would be to create a UIViewController, then add the UIImageView and a UITableView, but unfortunately, I am using a custom UITableViewController (just a library found on gihub to do what I needed), so my controller must be a UITableViewController.
Is there any way to do this? I've been going at this for a while with no luck.
Cheers,
Brett
There is no problem using UIViewController idea. You just keep 2 view controllers: 1) UIViewController, which has the UIImageView inside, and subview the view of 2) the UITableViewController. If necessary, make the UITableViewController a strong reference of the UIViewController.
I have done something similar all the time.
Yes, there are few ways. You could create your view hierarchy programmatically at
viewDidLoad or use a NIB file. Make sure that you correctly link the delegates and view properties.
If a nib file is specified via the initWithNibName:bundle: method (which is declared by the superclass UIViewController), UITableViewController loads the table view archived in the nib file. Otherwise, it creates an unconfigured UITableView object with the correct dimensions and autoresize mask. You can access this view through the tableView property.
If a nib file containing the table view is loaded, the data source and delegate become those objects defined in the nib file (if any). If no nib file is specified or if the nib file defines no data source or delegate, UITableViewController sets the data source and the delegate of the table view to self.
As https://stackoverflow.com/a/6961973/127493 say, UITableViewControllers can be replaced by simple UIViewControllers.
In fact, the trick is to add an UITableView to you UIViewController, make it delegate and etc..., and add it to your UIViewController.view.
So you will be able to add some "sister" views to your controller main view.
In my case, I am adding a an Image ( actually button with image) and when user touches on image, it will disappear and tableview will be shown.
so i am disabling scroll first then enable it back
find code below
// in viewDidLoad
[self.view addSubview:imgview];
tbl.scrollEnabled = NO;
// in -(IBAction)btnClicked:(id)sender
[imgview removeFromSuperview];
tbl.scrollEnabled = YES;
Thats working for me.
Do NOT use UITableViewController at all (I never use it and as I've heard nearly any developer uses it). It is a nightmare when you want to customize design with it.
Create your own subclass of UIViewController (MYTableViewController), add UITableView *tableView instance #property and #synthetize it:
#interface MYTableViewController : UIViewController <UITableViewDelegate,UITableViewDataSource> {
UITableView *tableView;
}
#property (nonatomic, retain) IBOutlet UITableView *tableView;
#end
Then in implementation add it to the view (using XIB or viewDidLoad method):
#implementation MYTableViewController
#synthesize tableView;
// If not XIB used:
-(void)viewDidLoad{
[super viewDidLoad];
CGRect frame = self.view.bounds;
self.tableView = [[[UITableView alloc] initWithFrame:frame style:UITableViewStylePlain] autorelease];
tableView.dataSource = self;
tableView.delegate = self;
[self.view addSubview:tableView];
// And here you van add your image:
[self.view addSubview:imageView];
}
// Do not forget to release it and clear delegate and datasourcce when view uloads:
#pragma mark - Memory management:
-(void)dealloc{
self.tableView.delegate = nil;
self.tableView.dataSource = nil;
self.tableView = nil;
[super dealloc];
}
- (void)didReceiveMemoryWarning {
self.tableView.delegate = nil;
self.tableView.dataSource = nil;
self.tableView = nil;
[super didReceiveMemoryWarning];
}
-(void)viewDidUnload{
self.tableView.delegate = nil;
self.tableView.dataSource = nil;
self.tableView = nil;
[super viewDidUnload];
}
#end
I have a custom UIView object with a nib that defines the view/subview layout. My outlets are connected, and when I init the object from initWithFrame: everything is in order.
The problem I'm having is when I'm using IB to embed the UIView into another nib; the custom UIView appears, but none of the subviews it contains appear - in fact their symbols all resolve to nil. I have a very minimal initWithCoder: and awakeFromNib: implementation (just does logging) and my understanding is that as the nib is deserialized the subviews should at least be initialized during the process?
The only conclusion I'm coming to on my own is that one of two things is happening: either my outlet references are corrupt/bad and aren't working, or my understanding of load-from-nib process is faulty and I'm missing something.
Thanks in advance!
Edit: (Code posted for Nekto as requested... as you'll see, it does logging and thats it, heh.)
- (id)initWithCoder:(NSCoder *)aDecoder {
if ((self = [super initWithCoder:aDecoder])) {
NSLog(#"ThumbnailGridView.initWithCoder frame= %f, %f", self.frame.size.width, self.frame.size.height);
}
return self;
}
- (void)awakeFromNib
{
NSLog(#"ThumbnailGridView:awakeFromNib");
}
Edit 2: Nibs, controllers, subviews, etc.
Nibs: I have a single nib containing a UIView. This UIView contains a single UIScrollView, which is filled with a grid of UIViews that are defined in another nib. (Note: this part works fine, as the fill is done programmatically and works with an initWithFrame: call.) The problem here is that the UIScrollView symbol is nil after initWithCoder: and awakeFromNib: are both called, so objects are just being added to nil and nothing happens. If the scrollview symbol was not nil, I'm sure this would work.
Controllers: There are two controllers that utilize this, one is done with initWithFrame: and works perfectly, the other embeds it as a nib-based reference. (As mentioned elsewhere here, defining a UIView in IB, setting the custom class.) I stepped through the code, and that view -is- being initialized properly - only its subviews are "missing".
Does this help give a clearer picture of the situation at all?
You may be misunderstanding how nib loading works. If you define a custom UIView and create a nib file to lay out its subviews you can't just add a UIView to another nib file, change the class name in IB to your custom class and expect the nib loading system to figure it out. You need to modify initWithCoder of your custom UIView class to programmatically load the nib that defines its subview layout. e.g.:
- (id)initWithCoder:(NSCoder *)aDecoder {
if (self = [super initWithCoder:aDecoder]) {
[[NSBundle mainBundle] loadNibNamed:#"CustomView" owner:self options:nil];
[self addSubview:self.toplevelSubView];
}
return self;
}
Your custom view's nib file needs to have the 'File's owner' class set to your custom view class and you need to have an outlet in your custom class called 'toplevelSubView' connected to a view in your custom view nib file that is acting as a container for all the subviews. Add additional outlets to your view class and connect up the subviews to 'File's owner' (your custom UIView).
Alternatively, just create your custom view programmatically and bypass IB.
Check that you are calling the 'super' implementation of initWithCoder: and awakeFromNib in each of your overridden methods i.e.
- (id)initWithCoder:(NSCoder *)decoder {
if ((self = [super initWithCoder:decoder])) {
...your init code...
}
return self;
}
- (void)awakeFromNib {
[super awakeFromNib];
...your init code...
}
I know how to place a nib file in the "main" view controller:
when I execute this method a new nib file will be displayed.
Is it possible to place that nib file in a UIView controller instead?
I want to place that nib file in that view controller instead of in the main view. How could I do that?
Edit:
I tried doing what you mention Paul I don't know what am I doing wrong. Anyways here is what I did:
I created another view controller with the properties an methods you mentioned.
I hooked up my IBoutlet UIView *exampleView to the base view:
then from here I am lost I don't know where to place the other methods. I would like to place that exampleView into:
that view.
I have tried placing them in pgBackground.m but it does not work. I want to place them inside an IBaction so that I can load that with a touch up inside event with a button.
I managed to place a nib file in a uiview control but I have the problem that the subview will not rotate if the device does. I am currently working on a solution to this but so far here is a question that can show you how to add the view from another nib file to a uiview control.
If I follow I think you will need to:
Create a UIView sub class with associated xib
ExampleView.h
ExampleView.m
ExampleView.xib
Set up a property to contain the View hierarchy (everything you want to be hooked up in Interface builder)
ExampleView.h
#property (nonatomic, retain) IBOutlet UIView *exampleView;
ExampleView.m
#synthesize exampleView = _exampleView;
In the ExampleView.m you need to add:
- (void)awakeFromNib
{
[super awakeFromNib];
[[NSBundle mainBundle] loadNibNamed:#"ExampleView" owner:self options:nil];
[self addSubview:self.exampleView];
}
You use awake from nib so you can use this sub class in Interface Builder. If you also want to instantiate it in code you need to hook up the xib in the init method. In this case I would probably extract the nib loading like so:
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
[self loadNibIntoView];
}
return self;
}
- (void)awakeFromNib
{
[super awakeFromNib];
[self loadNibIntoView];
}
- (void)loadNibIntoView
{
[[NSBundle mainBundle] loadNibNamed:#"ExampleView" owner:self options:nil];
[self addSubview:self.exampleView];
}
In the ExampleView.xib file make sure to hook up your IBOutlet UIView *exampleView to the base view.
Now in any xib file where you want to use your custom view simply drag it into your window and change the class to your subclass. This is how I got it working I look forward to some people suggesting improvements.
can u tell me what u want to do? if u want to change orientation then first u declare a bool en type variable in app delegate file then define in app delegate.m file if orientation change then detect and make Boolean type variable true for landscape and false for portrait. this process use for next all views. and u want u execute nib in main view controller then u have two ways one is dynamically and other by interface builder. in interface builder u Select navigation controller and drop in main window file . after that u change the view of navigation controller's view by press cmd+4 and select view which u want to display first.
-(IBAction)btnSubmit_click{
UIDeviceOrientation orientation = [[UIDevice currentDevice]orientation];
if (orientation == UIDeviceOrientationLandscapeLeft) {
// Do stuff
}
else if (orientation == UIDeviceOrientationLandscapeRight) {
// Do stuff like [self setCordinateLandscape];
}
}
-(BOOL)shouldAutorotateToInterfaceOrientation: (UIInterfaceOrientation) interfaceOrientation
{
// Return YES for supported orientations
//set as per requirements ====>>
return (interfaceOrientation == UIDeviceOrientationLandscapeRight);
// Or return TRUE;
}
I have a ViewController that responds to some touchEvents (touchesBegan, touchesMoved, etc...).
I've found that when I show this controller using presentModalViewController: it works just fine, but I'm trying to add it's View as a subview of another ParentViewController like so:
- (void)viewDidLoad
{
[super viewDidLoad];
//Add SubController
controller = [[SubViewController alloc] initWithNibName:#"SubViewController" bundle:nil];
controller.view.frame = CGRectMake(0, 30, 300, 130);
[view addSubview:controller.view];
[controller release];
}
When I do this, it gets added the parent view but it no longer responds to touch events. Is there a way to fix this?
Also, is there a better way to go about this? I know I probably could have used a View subclass for the child view, but it's supposed to use a Nib and I wasn't sure how to handle that without using a ViewController.
You're correct you should use a UIView subclass.
The easiest way to load it from a nib is to include the subview in your nib.
Just drop a UIView into the view connected to the original view controller.
Then with the view inside selected go to the identity inspector. It's the one that looks like a little ID card.
The very first field is called Custom Class.
Type the name of your UIView subclass here.
If you need a reference to this just create an IBOutlet in your original view controller and hook it up. That way you can set hidden = YES until you need it.
In your UIView subclass you might want to override
- (void)awakeFromNib
This will get called when the nib first unpacks.
for setting up any gesture recognizers, etc.
To load a nib directly into a view :
// Get the views created inside this xib
NSArray *views = [NSBundle mainBundle] loadNibNamed:#"myViewNib" owner:nil];
// There's probably only one in there, lets get it
UIView *myView = [views objectAtIndex:0];
// Do stuff . . .
[[self view] addSubview:myView];
You could try to call becomeFirstResponder in your subview and see whether it receives touchesBegan... It is probably so, but it will also possibly make the superview not receive touchesBegan if you require it...