Current Setup
I have a subclass of a UIView that loads a content from a xib file - call it a XibOwnerClass. Also, among other classes, there is a class called Triangle which helps me to create triangles with or without a border, with different stroke or fill color etc. That class is designable in storyboard and some of its properties are defined as IBInspectable.
Currently, in my xib file, I use this triangle view and setup its inspectable properties through IB. And that is really cool and convenient... So if I look into xib, I will actually see the triangle view among other views.
So, lets go further. In order to use this XibOwnerClass, I drag the UIView element to the storyboard, and change its custom class to XibOwnerClass, so I get my designable properties specific for XibOwnerClass. So, I can setup all things in IB and when I run the app, everything works.
The problem
Even if this works, I wonder if there is a way, to have multiple views (of class XibOwnerClass) dragged on a storyboard, and to be able to configure all of them individually trough Interface Builder?
Currently when I drag the UIView and change its custom class to XibOwnerClass I see nothing. I mean, the view is there, and it has its standard properties + inspectable properties. But I can't see triangles defined in xib in this new view. Is there a way to do this?
I am aware that xib is reused in my case (and it is meant to be used like that), so if I change something in a xib, all views that load from it will be affected. But is there a way multiple views to load from the same xib, but when loaded, to see them & setup them individually?
Here is how I load from xib:
-(instancetype)initWithCoder:(NSCoder *)aDecoder{
if ((self = [super initWithCoder:aDecoder])){
UIView *myView = [[[NSBundle mainBundle] loadNibNamed:#"MyXib" owner:self options:nil] firstObject];
if (myView){
myView.frame = CGRectMake(myView.frame.origin.x, myView.frame.origin.y, self.frame.size.width, self.frame.size.height);
[self addSubview:myView];
//Initialize other stuff
[self commonInit];
}
}
return self;
}
Then in awakeFromNib: I use the values of inspectable properties...
EDIT:
Also I don't have initWithFrame: implemented, but I thought that it is not needed if load from nib (because it is not executed). But maybe this is needed while design time ?
can't really say what's wrong when you don't share class codes. but i guess you didnt use prepareForInterfaceBuilder. in your XibOwnerClass override prepareForInterfaceBuilder and call setups for view inside it for example change background colour or so.
override func prepareForInterfaceBuilder() {
//prepare setups or things to show in storyboard
}
Okay, I have solved it. It turned out that I shouldn't use Main Bundle but rather bundle for that class, like described here.
So here is the code:
NSBundle *bundle = [NSBundle bundleForClass:[self class]];
#Mohammadalijf's answer in general is correct. It is just not a direct solution for my issue. But later on, when I fixed bundle thing, I used prepareForInterfaceBuilder like he said, and initialized things there so everything was available at design time.
Some useful stuff related to all this can be found here as well.
In my app I have two screens - first to show a user profile, the second - to edit the profile information. They are similar. I have completed the xib file for the first screen.
What's the best way to reuse it on second screen?
You should encapsulate the related elements as a custom view class. You can tackle this problem by creating views with code instead of just xibs, and I would recommend this.
But, if you would prefer to use a xib, you can create one that models the stuff you want to reuse. And then in your view controller call some code like this:
UIView* aView = [UIView alloc] initWithFrame .....];
[[NSBundle mainBundle] loadNibNamed:#"MyReusableComponent" owner:aView options:nil];
UILabel* someLabel = aView.injectedLabel; //this is alive after loading the xib
[self.view addSubView:aView];
When you create your xib, your need to set the Files Owner to a class that will respond to the setters for the properties that will be injected. (Eg your new view class). This way you can wire up the references.
For more information, look at Apple's examples of loading table cells from a xib - this is the same technique. When you load a xib and specify the owner, it will inject the values from the xib into the owner, in this case a custom view.
Dou you mean that you enter the view controller's edit mode and reuse those those elements you have created ?
Enabling Edit Mode in a View Controller
You could use UITextFields (instead of UILabels you may have logically used for show) that you change in appearance, and switch enabled on/off. As a minimal example:
Show:
self.textField.borderStyle = UITextBorderStyleNone;
self.textfield.enabled = NO;
Edit:
self.textField.borderStyle = UITextBorderStyleBezel;
self.textfield.enabled = YES;
You could of course do more on appearance, than just these basics.
In Xcode: Go to file > duplicate.
Then name your duplicated xib something like "editProfile" This will give a duplicate of your first xib that you can adjust as necessary
I'm playing around with drawing in iOS apps. I have a class that is a subclass of UIView that draws some lines and stuff. When the user presses a button, I instantiate the class and do an addSubView on the view of the main UIViewController of the app. The more times the user presses that button, the more instances of that class get added to the view. It's working just fine.
Now I want to provide the user a way to delete one of those views. So far I've put a [self removeViewFromSuperview] into the touchesBegan method of the custom UIView. So when the user presses the drawing it gets removed from the view. But, it's not actually deleted, right? Since the view was instantiated within the method that executes when the button is pressed I have no way to reference it from within the UIViewController. What's the appropriate way to make sure I'm not wasting memory with a UIView that was created and removed?
On a related note, if I was to put a toggle switch on the main window's UIView that toggles delete, how can I check from within touchesBegan if that toggle switch is set to delete=yes? Would I have a some sort of boolean variable in the AppDelegate that I can check from within the UIView subclass? How would I reference that?
Thank you for your help,
Stateful
If you add the view like this:
UIView *viewBeingAdded = [[[UIView alloc] init] autorelease];
[view addSubview:viewBeingAdded];
You can remove it without leaking memory:
[theViewAboutToBeRemoved removeFromSuperview];
Regarding the UISwitch, you don't need to keep its value anywhere unless you need it for something else. You can access its value directly:
if ([theSwitch isOn]) { ... }
You don't even need an IBOutlet, you can access the switch with its tag:
UISwitch *theSwitch = (UISwitch *)[view viewWithTag:<# switch tag number #>];
if ([theSwitch isOn]) { ... }
In this case you must set a unique tag number for the switch in Interface Builder or when you create it.
When you do [mainView addSubView:myView], mainView will retain myView. If you created myView with alloc/init, then you retained it also. If you don't need myView after adding it to the main view then simply do [myView release] after adding it. When you remove it from the main view, it will get released and deallocated.
If you create the UIView with alloc/init, add it to the superview then release the view, the superview will retain it. When it is removed with removeViewFromSuperview it will be dealloc'ed.
I typically autorelease a view after adding it, leaving the parent the only reference.
As to checking a toggle, you could add an IBOutlet so you can inspect it directly. (This may not be pure MVC, but I don't know if putting it in [UIApplication sharedApplication].delegate is necessarily cleaner.)
I added a new nib file to my project, and tried to load it.
However, when I click on the toolbar icon that is supposed to take me to the view that I created, I get an NSInternalInconsistencyException with the message:
Terminating app due to uncaught exception
'NSInternalInconsistencyException', reason: '-[UIViewController
_loadViewFromNibNamed:bundle:] loaded the "..." nib but the view outlet was not set.'
So I opened up my nib file, and I see for the view that there are no referencing outlets set. However, I try to click and drag the circle for "new referencing outlet" to File's Owner, but it won't let me...what do I need to do to get my view to display?
Here's what worked for me:
Open the XIB file causing problems
Click on file's owner icon on the left bar (top one, looks like a yellow outlined box)
If you don't see the right-hand sidebar, click on the third icon above "view" in your toolbar. This will show the right-hand sidebar
In the right-hand sidebar, click on the fourth tab--the one that looks a bit like a newspaper
Under "Custom Class" at the top, make sure Class is the name of the ViewController that should correspond to this view. If not, enter it
In the right-hand sidebar, click on the last tab--the one that looks like a circle with an arrow in it
You should see "outlets" with "view" under it. Drag the circle next to it over to the "view" icon on the left bar (bottom one, looks like a white square with a thick gray outline
Save the xib and re-run
This is Josh Justice proposal, but in a graphical way (pictures are mine):
Select File owner
On right hand side panel select custom class.
Enter the custom class name
On right hand side panel select oultets
Drag view outlet to view component
Finally the View Controller is instantiated with the rolling code:
PTFilterUserVC *aFilterUserVC = [[PTFilterUserVC alloc] initWithNibName:#"FilterVC" bundle:nil];
//OPTIONAL.This is how 'I' am interested in present the view controller.
[self.navigationController pushViewController:aFilterUserVC animated:YES];
I can generally fix it by remaking the connection between File's Owner and the view. Control-drag from the File's owner to your View (in IB) and select view from the pop-up menu.
The View Identity - Class Identity was not set. After setting it to the appropriate class, the issue was resolved.
Are you sure you have a UIView (or subclass) assigned to the "view" property of yourViewController?
Right click on "File Owner" in the left pane of the xib for yourViewController and verify that the "view" outlet is set.
If not, set it to a view!
this will definetly fix the Issue
For me all the things stated here https://stackoverflow.com/a/6395750/939501 were true but still it was throwing error, reason was I created a View class with name ABCView and then deleted it later I added a view controller as ABCViewController so somehow it was referring to old ABCView in new view controller, I had to delete the ABCViewController and add a new one with different name that solved my issue.
Thanks
I had the same issue with XCode 4.6.3. I had started out with a couple files named MySettingsView.h and .m but deleted them in favor of MySettingsViewController.h, but despite trying most of the hints mentioned here, it still kept erroring with,
2013-07-05 11:48:17.205 MyApp[39024:c07] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason:
'-[UIViewController _loadViewFromNibNamed:bundle:] loaded the
"MySettingsView" nib but the view outlet was not set.'
It was evidently still "confused", trying to load MySettingsView.xib instead of MySettingsView Controller.xib. Maybe its "do what I mean" logic is too fancy.
So I worked around the problem by hardcoding the NIB/XIB name in MySettingsViewController.m:
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:#"MySettingsViewController" bundle:nibBundleOrNil];
}
I ran into this problem in a slightly different way from the other answers here.
If I simply created a new xib file, added a UIViewController to it in Interface Builder, and set that UIViewController's custom class to my view controller, that resulted in the "view outlet was not set" crash. The other solutions here say to control-drag the view outlet to the View, but for me the view outlet was greyed out and I couldn't control-drag it.
I figured out that my mistake was in adding a UIViewController in Interface Builder. Instead, I had to add a UIView, and set the Custom Class of the File's Owner to my view controller. Then I could control-drag the view outlet of the File's Owner to my new view UIView and everything worked as it should.
To anyone that is using an xib method to create a UIView and having this problem, you will notice that you won't have the "view" outlet under the connections inspector menu. But if you set the File's Owners custom class to a UIViewController and then you will see the "view" outlet, which you can just CMND connect an outlet to the CustomView.
My issue with this was caused by having a duplicate nib in the class folder that did not have the view set. xcode seemed to be choosing one nib for a build and then the other the next time I built the project. Just deleted the other one. Looks good. Doh!
Just spent more than hour trying to find out why my view property is not set in my view controller upon initiating it from nib. Remember to call "[super initWithNibName...]" inside your view controller's initWithNibName.
I just fixed this in mine. Large project, two files. One was "ReallyLargeNameView" and another was "ReallyLargeNameViewController"
Based on the 2nd answer chosen above, I decided I should clean my build. Nada, but I was still suspect of XCode (as I have two identical classes, should abstract them but eh...) So one's working, one's not. File's owner names are so far as copy and pasted, outlets rehooked up, xCode rebooted, still nothing.
So I delete the similar named class (which is a view). Soon, new error "outlet inside not hooked up" literally was "webView not key value" blah... basically saying "Visual Studio's better". Anyway... I erase the smaller named file, and bam, it works.
XCode is confused by similar-named files. And the project is large enough to need rebooting a bit, that may be part of it.
Wish I had a more technical answer than "XCode is confused", but well, xCode gets confused a lot at this point. Unconfused it the same way I'd help a little kid. It works now, :) Should benefit others if the above doesn't fix anything.
Always remember to clean your builds (by deleting off the simulator too)
The previous answers almost solved the problem for me, but the last step was missing.
Create a xib and swift file with the same name.
Set the file owner to be the UIView subclass.
Drag an outlet from the View to the UIView subclass, name it "contentView"
Add this custom initializer so when the xib loads it attaches the contentView
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
Bundle(for: self.classForCoder).loadNibNamed("SampleView", owner: self, options: nil)
addSubview(contentView)
contentView.frame = self.bounds
contentView.autoresizingMask = [.flexibleHeight, .flexibleWidth]
}
Now any #IBOutlets you add will be attached.
Cheers,
Richard
I also had the same problem and my issue was that i added an other Localisation (English) to the ViewControllers nib so my App with the Localisation German could´t find the nib with the Localisation English!! Hope this helps anybody!
I had face the same problem while accidentally deleted xib reference and added it again.I just fixed by making connection between Files owner and the view.Also make sure that your FilesOwner's custom class is your expected viewController.
For me, the problem was caused by calling initWithNibName:bundle:. I am using table view cells from a nib file to define entry forms that sit on tableViews. As I don't have a view, doesn't make sense to hook to one. Instead, if I call the initWithStyle: method instead, and from within there, I load the nib file, then things work as expected.
I had the same problem, but a slightly different solution was called for. The problem in this case was the class of the File Owner, rather than the class of the View. To set this, I had to click the "backwards play" icon in the lower left corner of the Interface Builder window, and options then appeared that isolated the characteristics of the File Owner, the First Responder, and the View. Clicking on the first one (a large transparent box), enabled me to then set its custom class as suggested above.
I had the same problem, but a different solution was called for. The problem in this case was the class of the File Owner was not connected to xib file.
I ran into something very similar tonight, with a Swift UIViewController subclass. In this case, none of the above fixes worked, but reordering my code a bit did. Net-net, having an extension to the subclass occur before the subclass's definition itself in the same file seems to confuse XCode, despite compiling fine; the fix was to place the extensions after the subclass's definition.
I've posted the details in an answer to this similar question.
In my case , the designated initializer - (instancetype)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil in ***ViewController class was implemented so even if when I call other initializer to initialize the object ,the designated initializer will be called .
So to resolve this problem checking wether the - (instancetype)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil is also a proper way.
My problem was in wrong classes. I used custom .xib for my custom view.
Correctly it has to be set like here:
View shouldn't have a class
Class which is used with the .xib is set in File's Owner tab
Outlets are connected to File's Owner and not to the View.
Just had the same error in my project, but different reason. In my case I had an IBOutlet setup with the name "View" in my custom UITableViewController class. I knew "view" was special because that is a member of the base class, but I didn't think View (different case) would also be a problem. I guess some areas of Cocoa are not case-sensitive, and probably loading a xib is one of those areas. So I just renamed it to DefaultView and all is good now.
select the files owner and goto open the identity inspecter give the class name to which it corresponds to. If none of the above methods works and still you can't see the view outlet then give new referencing outlet Connection to the File's Owner then you can able to see the view outlet. Click on the view Outlet to make a connection between the View Outlet and File's owner. Run the Application this works fine.
In my case, the view was not viewed in xib.
in xib the View was size = none (4th tab right hand). I set size to Freeform and reload xCode.
view was appealed and I set the proper link to View.
If you have tried everything and you still get this error, try re-creating the class file from scratch but remember to select the "Also create XIB file" check box. This will auto link up a few items that are not linked when creating these files separately. After this is created, you can likely cut and paste everything onto the new XIB and it should work fine.
I am finding this issue specifically with creating files separately in Swift.
for me it happened, when
I have a ViewController class ( .mm/h ) associated with the Nib file,
UIView from this ViewController has to be loaded on the another view as a subview,
we will call something like this
-(void)initCheckView{
CheckView *pCheckViewCtrl = [CheckView instance];
pCheckView = [pCheckViewCtrl view];
[[self view]addSubview:pCheckView];
[pCheckViewCtrl performCheck];
}
Where
+(CheckView *)instance{
static CheckView *pCheckView = nil;
static dispatch_once_t checkToken;
dispatch_once(&checkToken, ^{
pCheckView = [[CheckView alloc]initWithNibName:#"CheckView" bundle:nil];
if ( pCheckView){
[pCheckView initLocal];
**[pCheckView loadView];**
}
});
return pCheckView;
}
Here loadView was missing,,, adding this line resolved my problem.
I had the same problem, I figured out and it is because of i had ticked "Static cells" in the properties of Table View under Content option. Worked when it changed to "Dynamic Prototypes". Screenshot is below.
I had a similar problem with Xcode 9.3, and setting "Module" under the "File Owner's" attribute inspector to the project module fixed this for me.
Open your storyboard file where your viewController exists, or XIB related file with textEdit.app and check if the storyboard or XIB name is the same of your viewController, then change it, save and reload/restart Xcode.
If you're using a custom init method, check that you're returning something valid. I ran into a piece of code that crashed on something like this:
- (id)init {
self = [super init];
if (self) {
CustomController *controller = [[NSBundle mainBundle] loadNibNamed:NSStringFromClass(className) owner:self options:nil];
} return self;
}
In another class, the controller was created like so:
CustomController *controller = [[CustomController alloc] init];
The problem is that in the init method, self hasn't changed and should look like this instead:
- (id)init {
self = [super init];
if (self) {
CustomController *controller = [[NSBundle mainBundle] loadNibNamed:NSStringFromClass(className) owner:self options:nil];
[controller viewDidLoad];
self = controller;
} return self;
}