I'm making a custom UI component in XCode 6.4, using Objective-C. In the main storyboard where I use the component whenever I change one of the IBInspectable values I get the following error:
Main.storyboard: warning: IB Designables: Ignoring user defined runtime attribute for key path "icon" on instance of "UIView". Hit an exception when attempting to set its value: [<UIView 0x7fc33a5601c0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key icon.
I'm loading a .xib file and I'm overriding the initWithCoder & initWithFrame methods as follows:
- (void) loadView {
NSBundle *bundle = [NSBundle bundleForClass:[self class]];
UIView *view = [[bundle loadNibNamed:#"TheNameOfTheNIB" owner:self options:nil] firstObject];
[self addSubview:view];
view.frame = self.bounds;
view.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
[iconButtton setImage:_icon forState:UIControlStateNormal|UIControlStateSelected];
}
- (instancetype)initWithCoder:(NSCoder *)coder
{
self = [super initWithCoder:coder];
if (self && self.subviews.count == 0) {
[self loadView];
}
return self;
}
- (instancetype)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
[self loadView];
}
return self;
}
In initWithCoder: I had to use a check if there was a subview because it was going into an infinite loop (the xib file in loadView is calling initWithCoder: again.
So when I build and run this it shows up correctly (but only with the default values in the NIB not with the correct ones I pass in the storyboard), but the live preview of the component doesn't show up in Interface Builder at all.
Update
Here's the header file for the custom UI component
#import <UIKit/UIKit.h>
IB_DESIGNABLE
#interface CustomComponent : UIView
#property (assign, nonatomic) IBInspectable UIImage *icon;
#property (weak, nonatomic) IBOutlet UIButton *iconButtton;
#end
Related
I am using multiple XIBs/Storyboards to build my application.
I have the views laid out in the XIBs. Some have UIStackView to help organize the layout.
My main storyboard has two views embedded in a UIStackView that pulls in those views that are created with the XIBs.
Nothing will display correctly. The views are mis-sized or do not show up at all, despite displaying properly in interface builder.
My suspicion is the views are being displayed, BEFORE they are fully loaded into the view causing the frames to be different sizes.
I've been told the best practice is to give views their own Storyboard/XIB for better merging, maintenance etc... So that is what I am trying to learn.
Does anyone know the proper way to accomplish what I am doing?
Here is what I am doing:
ViewController
#import "OrangeView.h"
#import "GreenView.h"
#interface ViewController () {
OrangeView *ov;
GreenView *gv;
}
#property (weak, nonatomic) IBOutlet UIView *viewOrange;
#property (weak, nonatomic) IBOutlet UIView *viewGreen;
#end
#implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
//Load Orange View
ov = [[OrangeView alloc] initWithFrame:_viewOrange.frame];
[_viewOrange addSubview:ov];
//Load GreenView
gv = [[GreenView alloc] initWithFrame:_viewGreen.frame];
[_viewGreen addSubview:gv];
}
Main Storyboard
OrangeView
GreenView (with multiple stackviews)
Overview
The contents of a .xib file are not "linked" to the class. That is, when you instantiate the class, that does not - by itself - also load the views and subviews you've laid out in the xib.
There are a couple ways to go about it. One method is to include the "load the elements" code inside your view class. That allows a more "conventional" approach of load/create a view instance, add as subview, set parameters (frame or constraints), etc.
Here is an example of subclassing UIView with the "xib-load" functions, and then making your actual class a sub-class of this "base":
//
// XIBViewBase.h
//
#import <UIKit/UIKit.h>
#interface XIBViewBase : UIView
#end
//
// XIBViewBase.m
//
#import "XIBViewBase.h"
#implementation XIBViewBase
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
[self xibSetup];
}
return self;
}
- (id)initWithCoder:(NSCoder *)coder
{
self = [super initWithCoder:coder];
if (self) {
[self xibSetup];
}
return self;
}
- (void)awakeFromNib {
[super awakeFromNib];
[self xibSetup];
}
- (void)xibSetup {
// make sure we don't add the subviews more than once
if (!self.subviews.count) {
UIView *view = [self loadFromXIB];
view.frame = self.bounds;
view.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
[self addSubview:view];
[self sendSubviewToBack:view];
}
}
- (UIView *)loadFromXIB {
// Note: the .xib file MUST be named the same as the class for this to work
NSString *className = NSStringFromClass([self class]);
NSBundle *bundle = [NSBundle bundleForClass:[self class]];
UINib *nib = [UINib nibWithNibName:className bundle:bundle];
UIView *v = [nib instantiateWithOwner:self options:nil].firstObject;
return v;
}
#end
I put together an example of this (using your target) that you can take a look at. Might help you get a handle on it:
https://github.com/DonMag/SimpleXIB
I have created two different subviews EPStudentProgressOpenQuestion and EPStudentProgressMultipleChoiceQuestion. They both inherit from EPStudentProgressQuestion as they both subviews share some common information and behaviours.
Each one of the views has its own XIB file.
Inside EPStudentProgressQuestion there is the following code:
#import "EPStudentProgressQuestion.h"
#interface EPStudentProgressQuestion ()
#property (assign, nonatomic) EPStudentProgressQuestionType questiontype;
#end
#implementation EPStudentProgressQuestion
#pragma mark - UIView lifecycle
- (instancetype)initWityQuestionType:(EPStudentProgressQuestionType)questionType {
self = [super init];
if (self) {
self.questiontype = questionType;
[self setupView];
}
return self;
}
- (instancetype)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
[self setupView];
}
return self;
}
- (instancetype)initWithCoder:(NSCoder *)aDecoder {
self = [super initWithCoder:aDecoder];
if (self) {
[self setupView];
}
return self;
}
#pragma mark - Private methods
- (void)setupView {
NSBundle *bundle = [NSBundle bundleForClass:[self class]];
UIView *view = [[bundle loadNibNamed:[self nibNameForQuestionType] owner:[self class] options:nil] firstObject];
view.frame = self.bounds;
[self.layer setCornerRadius:2.f];
[self.layer setBorderWidth:1.f];
[self.layer setBorderColor:[UIColor colorWithWhite:232/255.f alpha:1.f].CGColor];
[self setClipsToBounds:YES];
[self setTranslatesAutoresizingMaskIntoConstraints:NO];
[self addSubview:view];
}
- (NSString*)nibNameForQuestionType {
switch (self.questiontype) {
case EPStudentProgressQuestionTypeOpen:
return #"EPStudentProgressOpenQuestion";
case EPStudentProgressQuestionTypeMultipleChoice:
return #"EPStudentProgressMultipleChoiceQuestion";
}
}
As you can see, very simple code.
As I said above, each EPStudentProgressQuestion view has its own XIB file, connecting the Files Owner through the Identity Inspector class.
This is EPStudentProgressOpenQuestion:
#import "EPStudentProgressOpenQuestion.h"
#interface EPStudentProgressOpenQuestion ()
#property (weak, nonatomic) IBOutlet UILabel *lblQuestion;
#end
#implementation EPStudentProgressOpenQuestion
#end
Exactly the same for EPStudentProgressMultipleChoiceQuestion just without any IBOutlet. But as soon as I create IBOutlets to any of those views, I get the error ... IBOutlet is not key-value compliant...
Without the IBOutlets everything works fine. Each view loads correctly and it's well placed in the view I want to. But as soon as I link some IBOutlets from the XIB to the corresponding class, it crashes...
This is the crash:
*** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<EPStudentProgressQuestion 0x1020196b0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key lblQuestion.'
And this is how I instantiate the EPStudentProgressQuestion view:
EPStudentProgressOpenQuestion *questionView = [[EPStudentProgressOpenQuestion alloc] initWityQuestionType: EPStudentProgressQuestionTypeOpen];
[self.vQuestionsContainer addSubview:questionView];
Any idea on how to be able to link IBOutlets without having problems?
Thank you in advance!!
EDIT:
If I change the bundle and owner classes as follows:
NSBundle *bundle = [NSBundle bundleForClass:[EPStudentProgressOpenQuestion class]];
NSArray *views = [bundle loadNibNamed:[self nibNameForQuestionType] owner:[EPStudentProgressOpenQuestion class] options:nil];
UIView *view = [views firstObject];
I get the same error but instead of EPStudentProgressQuestion I get the error for EPStudentProgressOpenQuestion...
EDIT 2:
Test project link: https://mega.nz/#!oBhWkawC!RSOzrPOfq_UTVWd3jraRkneuCIyIkS61PKGeca2Bilc
The problem that's crashing you is that you are passing [self class] instead of just self as the nib owner. Change your nib loading line to this:
NSArray *views = [bundle loadNibNamed:[self nibNameForQuestionType] owner:self options:nil];
You have another problem which is that you're loading the nib twice. In initWityQuestionType:, you call [super init]. What you don't realize is -[UIView init] calls [self initWithFrame:CGRectZero]. So you end up calling into your overridden initWithFrame:, which calls setupView. Then when it returns back to initWityQuestionType:, that also calls setupView.
I recommend you get rid of your initWithFrame: override entirely.
Your crash indicates that EPStudentProgressQuestion (your superclass) is not key-value compliant. This means at the point where you are accessing the IBOutlet you have a reference to EPStudentProgressQuestion instead of either EPStudentProgressOpenQuestion or EPStudentProgressMultipleChoiceQuestion.
Just check the code where you are using the new IBOutlets and either change the type of the variable used there or add a cast to the correct class.
Your view controller may have the wrong class in your xib. Please change the UIView class name not the in the File's Owner like the pic
Also you called a [self setup] method in:
- (instancetype)initWityQuestionType:(EPStudentProgressQuestionType)questionType {
self = [super init];
if (self) {
self.questiontype = questionType;
[self setupView];
}
return self;
}
You don't need to call it again
- (instancetype)initWithFrame:(CGRect)frame {
}
and
- (instancetype)initWithCoder:(NSCoder *)aDecoder {
}
it is creating a init loop and causing a memory leak.
I have created a custom subclass of UIView along with a xib file and declared IBOutlets and IBActions within the custom class.
#interface ContactUsView : UIView
#property (nonatomic, weak) IBOutlet UIButton *displayCloseButton;
- (IBAction)callButtonPressed:(id)sender;
- (IBAction)emailButtonPressed:(id)sender;
- (IBAction)displayCloseButtonPressed:(id)sender;
#end
In the xib file I have dragged in a UIView to represent my custom view. I have set:
Files owner = to my custom class
Have set the dragged in UIView to my custom class.
I have then added various buttons which are hooked up to the 3 methods stated above.
Inside the ContactUsView.m I have the following:
- (id)initWithFrame:(CGRect)frame
{
if (self = [super initWithFrame:frame]) {
NSArray* array = [[NSBundle mainBundle] loadNibNamed:#"ContactUsView" owner:self options:nil];
for (id object in array) {
if ([object isKindOfClass:[ContactUsView class]])
self = (ContactUsView *)object;
}
}
return self;
}
When I come to create this view I do the following:
- (void)viewWillAppear:(BOOL)animated
{
ContactUsView *contactUs = [[ContactUsView alloc] initWithFrame:CGRectZero];
CGPoint origin = self.view.frame.origin;
CGSize size = self.view.frame.size;
[contactUs setFrame:CGRectMake(origin.x,
CGRectGetMaxY(self.view.frame) - 100,
size.width,
contactUs.frame.size.height)];
[self.view addSubview:contactUs];
}
Issue
When I press on one of the buttons the application crashes with:
Thread 1: EXC_BAD_ACCESS(code=2, address=0xb0c
Can anyone help me with this. I feel like I am probably making a mistake somewhere in regards to creating and loading custom uiviews from xibs.
If you require anymore information let me know. Many thanks.
Future reference
When creating a custom view using a xib DO NOT set the files owner. Instead create all your IBOutlets and IBActions as you normally would and then to hook them up open the Utilities tab and control drag from there.
• Files owner = to my custom class
Wrong. Files owner should be empty. The view itself is files owner. It means that you should connect all actions and outlets with ContactUsView in your xib.
[[NSBundle mainBundle] loadNibNamed:#"ContactUsView" owner:self options:nil]
...
self = (ContactUsView *)object;
After you passed self as ownerparameter. You changing it. Which means that previously allocated ContactUsView (self) will be destroyed since -loadNibNamed:owner:options: do not retain it. If you apply my first advice you should send nil as owner parameter
forloop here is not necessary use just array[0], because this is always your view if you have valid views hierarchy in your xib
If you are loading a UIView for an xib then you should create a class method to load the view.
In your customview.h
+(id)customView;
& in your customview.m
+ (id)customView
{
CustomView *customView = [[[NSBundle mainBundle] loadNibNamed:#"CustomView" owner:nil options:nil] lastObject];
if ([customView isKindOfClass:[CustomView class]])
return customView;
else
return nil;
}
You can initialize it anywhere using:
CustomView *myView = [CustomView customView];
EDIT: Make sure you have changed your customview's class in identity inspecter & also make sure your connection of IBActions are with that class' methods.
You can use delegate for this
this is how you can do this
#protocol CustomViewDelegate <NSObject>
- (void)callButtonPressed:(id)sender;
- (void)emailButtonPressed:(id)sender;
- (void)displayCloseButtonPressed:(id)sender;
#end
#interface ContactUsView : UIView
#property (nonatomic, weak) IBOutlet UIButton *displayCloseButton;
#property (nonatomic, weak) id<CustomViewDelegate> ButtonDelegate;
- (IBAction)callButtonPressed:(id)sender;
- (IBAction)emailButtonPressed:(id)sender;
- (IBAction)displayCloseButtonPressed:(id)sender;
#end
and in .m file
- (IBAction)callButtonPressed:(id)sender
{
[self.ButtonDelegate callButtonPressed:sender];
}
- (IBAction)emailButtonPressed:(id)sender{
[self.ButtonDelegate emailButtonPressed:sender];
}
- (IBAction)displayCloseButtonPressed:(id)sender{
[self.ButtonDelegate displayCloseButtonPressed:sender];
}
After that just set the delegate with viewcontroller refrence and use those delegate here
- (void)viewWillAppear:(BOOL)animated
{
ContactUsView *contactUs = [[ContactUsView alloc] initWithFrame:CGRectZero];
contactUs.ButtonDelegate = self;
CGPoint origin = self.view.frame.origin;
CGSize size = self.view.frame.size;
[contactUs setFrame:CGRectMake(origin.x,
CGRectGetMaxY(self.view.frame) - 100,
size.width,
contactUs.frame.size.height)];
[self.view addSubview:contactUs];
}
- (void)callButtonPressed:(id)sender
{}
- (void)emailButtonPressed:(id)sender
{}
- (void)displayCloseButtonPressed:(id)sender
{}
I have done this and works totlly fine
I know this is quite straight forward but after too much hair-pulling I am nowhere near solution.
I have seen tutorials explaining how to create view using XIB and all. But none of them address the situation that I have here.
I have an XIB file, a custom UIView subclass that has few labels and buttons. The UIView subclass is reusable, and that is the reason I can't have outlets inside any single View controller. As a result I store individual controls (subviews) of this view inside my custom UIView itself. This is logical, as no view controller should own the subviews of this custom view which is to be included in every view controller.
The problem is, I don't know how to initialize the entire UI fully.
Here is my code for UIView Subclass:
#interface MCPTGenericView : UIView
+(id)createInstance : (bool) bPortrait;
#property (weak, nonatomic) IBOutlet UIView *topView;
#property (weak, nonatomic) IBOutlet UIView *titleView;
#property (weak, nonatomic) IBOutlet UILabel *titleLabel;
#property (weak, nonatomic) IBOutlet UIButton *logoButton;
#property (weak, nonatomic) IBOutlet UITextField *searchTextField;
#property (weak, nonatomic) IBOutlet UIButton *menuButton;
#end
Later on, I also plan to use this same XIB file for landscape orientation of this UIView too, and I plan to use the same above outlets with landscape oriented controls in same XIB.
And here is the implementation:
#implementation MCPTGenericView
//#synthesize topView, titleLabel, titleView;
+(id)createInstance : (bool) bPortrait
{
UIView * topLevelView = nil;
MCPTGenericView * instance = [MCPTGenericView new];
NSArray * views = [[NSBundle mainBundle] loadNibNamed:#"MoceptGenericView" owner:instance options:nil];
int baseTag = (bPortrait)?PORTRAIT_VIEW_TAG_OFFSET:LANDSCAPE_VIEW_TAG_OFFSET;
// make sure customView is not nil or the wrong class!
for (UIView * view in views)
{
if (view.tag == baseTag)
{
topLevelView = view;
break;
}
}
instance.topView = (MCPTGenericView *)[topLevelView viewWithTag:baseTag + 1];
instance.searchTextField = (UITextField *)[topLevelView viewWithTag:baseTag + 2];
instance.menuButton = (UIButton *)[topLevelView viewWithTag:baseTag + 3];
instance.logoButton = (UIButton *)[topLevelView viewWithTag:baseTag + 4];
instance.titleView = [topLevelView viewWithTag:baseTag + 5];
instance.titleLabel = (UILabel *)[topLevelView viewWithTag:baseTag + 6];
return instance;
}
-(id)initWithCoder:(NSCoder *)aDecoder
{
if ((self = [super initWithCoder:aDecoder]))
{
[self addSubview:[[[NSBundle mainBundle] loadNibNamed:#"MCPTGenericView" owner:self options:nil] objectAtIndex:0]];
}
return self;
}
-(void)awakeFromNib
{
[super awakeFromNib];
[self addSubview: self.titleView];
[self addSubview:self.topView];
}
- (id) init
{
self = [super init];
if (self)
{
[[NSBundle mainBundle] loadNibNamed:#"MCPTGenericView" owner:self options:nil];
[self addSubview:self.topView];
[self addSubview:self.titleView];
}
return self;
}
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self)
{
// Initialization code
[[NSBundle mainBundle] loadNibNamed:#"MCPTGenericView" owner:self options:nil];
[self addSubview:self.topView];
[self addSubview:self.titleView];
}
return self;
}
/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect
{
// Drawing code
}
*/
#end
Something that worked:
I succeeded in calling initWithFrame:frame from my viewcontroller. That way, I could see all controls properly initialized. But then, why should I be supplying a frame if I have already drawn an XIB? Shouldn't loadNibNamed be handling frame setting and layout stuff since that is the intended use of XIBs?
I am also baffled at the way loadNibNamed needs an owner object. Why do we already need an object to get the same object from XIB? That too, a half-baked one?
Please help...
What was baffling me was the way loadnibnamed loses xib layout & outlet information. I finally found a way to achieve it.
Here is a recap of what works:
1) Suppose MyCustomView is your custom view class - you design it and its subviews as part of XIBs. You do this via interface builder, so self-explanatory.
2) Add MyCustomView.h and MyCustomView.m (boilerplate) via Xcode -> File -> New -> Objective C Class.
3) Next, within MyCustomView.xib, set File's Owner = MyCustomView (class name just added). Do not touch top most View's custom class - leave it as UIView. Else it will end up in recursion!!!
4) In MyCustomView.h, create few outlets corresponding to subviews within MyCustomView.xib.
Such as:
#property (weak) IBOutlet UILabel * label1;
#property (weak) IBOutlet UIButton * button1;
5) Go to MyCustomView.xib. Select each subview (label, button), right click, drag from "New Referencing Outlet" and drag it up to File's Owner.
This will popup a list of outlets matching the subview's type from where you have dragged. If you dragged from a label, it will pop up label1, and so on. This shows that all you did up to this step is correct.
If you, on the other hand, screwed up in any step, no popup will appear. Check steps, especially 3 & 4.
If you do not perform this step correctly, Xcode will welcome you will following exception:
setValue:forUndefinedKey: this class is not key value coding-compliant for the key
6) In your MyCustomView.m, paste / overwrite following code:
-(id)initWithCoder:(NSCoder *)aDecoder
{
self = [super initWithCoder:aDecoder];
if (self)
{
NSString * nibName = #"MyCustomView";
[[[NSBundle mainBundle] loadNibNamed:nibName owner:self options:nil] firstObject];
[self addSubview:self.labelContinentName];
}
return self;
}
This step is crucial - it sets your outlet values (label1, button1) from nil to tangible subviews, and most importantly, sets their frame according to what you have set within MyCustomView.xib.
7) In your storyboard file, add view of type MyCustomView - just like any other view:
Drag a UIView in your View Controller main view rectangle
Select the newly added view
In Utilities -> Identity Inspector, set custom class value = MyCustomView.
It should be up & running no problem!
loadNibNamed does not handle frame setting, it only loads content and makes the objecet available to your code. initWithFrame: must be called to insert a new object to the view heirarchy of a window.
I'm trying to create a custom UIView which holds references to its own IBOutlets. I then want to put this custom UIView into another nib.
I'm doing some additional logic in the custom UIView's awakeFromNib method. Unfortunately, when I try to access the IBOutlets in awakeFromNib, they are nil.
Here's the setup:
I have a UIView subclass, CustomView.
I have a custom .xib file with three subviews
In the other nib (that belongs to the view controller), I have dragged a UIView onto the view, and then changed the custom class to CustomView.
I tried setting the view in the CustomView nib in IB to a custom class CustomView and connecting the IBOutlets to the view, but they were still nil.
I tried setting file owner to CustomView and connecting the IBOutlets to file's owner, but they were still nil.
I also tried using another IBOutlet UIView *view and then adding that as a subview to self in awakeFromNib but that also didn't do anything.
Here's the code:
// CustomView.h
#interface CustomView : UIView
#property (nonatomic, retain) IBOutlet UITextField *textField;
#property (nonatomic, retain) IBOutlet UIView *subview1;
#property (nonatomic, retain) IBOutlet UIView *subview2;
// CustomView.m
#implementation CustomView
#synthesize textField, subview1, subview2;
- (id)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
[[NSBundle mainBundle] loadNibNamed:#"CustomView" owner:self options:nil];
}
return self;
}
- (id)initWithCoder:(NSCoder *)aDecoder {
self = [super initWithCoder:aDecoder];
if (self) {
}
return self;
}
- (void)awakeFromNib {
[super awakeFromNib];
[self setup];
}
- (void)setup {
// Fails because self.textField is nil
self.textField.text = #"foo";
}
I ended up using the steps in the most recent edit here and they worked beautifully.
You use a plain UIView as the top level view in the xib.
You then set file's owner to the custom subclass (CustomView).
Finally, you add a line:
[self addSubview:[[[UINib nibWithNibName:#"CustomView" bundle:nil] instantiateWithOwner:self options:nil] objectAtIndex:0]];
in the if (self != nil) block in both initWithCoder and initWithFrame.
Voila! The IBOutlets are hooked up and ready to go after the call. Really pleased with the solution, but it was very difficult to dig up.
Hope this helps anyone else.
EDIT: I updated the link to one that isn't dead. Since I never spelled out the full code, here is what it looks like after modification:
- (id)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
UIView *nib = [[[UINib nibWithNibName:#"CustomView" bundle:nil] instantiateWithOwner:self options:nil] objectAtIndex:0];
[self addSubview:nib];
}
return self;
}
- (id)initWithCoder:(NSCoder *)aDecoder {
self = [super initWithCoder:aDecoder];
if (self) {
UIView *nib = [[[UINib nibWithNibName:#"CustomView" bundle:nil] instantiateWithOwner:self options:nil] objectAtIndex:0];
[self addSubview:nib];
}
return self;
}
- (void)awakeFromNib {
[super awakeFromNib];
[self setup];
}
- (void)setup {
// Doesn't fail because life is awesome
self.textField.text = #"foo";
}
This pattern has become so common that I actually created a category on UIView called UIView+Nib, which implements the following method:
+ (UIView *)viewWithNibName:(NSString *)nibName owner:(id)owner {
return [[[UINib nibWithNibName:nibName bundle:nil]
instantiateWithOwner:owner options:nil]
objectAtIndex:0];
}
So the above code can be simplified to:
[self addSubview:[UIView viewWithNibName:#"CustomView" owner:self]];
Note also that the above code can be refactored even more, since the logic is exactly the same in initWithFrame: and initWithCoder:. Hope that helps!
As in Dr. Acula's answer, This is probably because custom view's nib is lazy loaded when loaded from another nib (Nested nib loading), so we need to instantiate it manually. In swift code will look like this :
override func awakeFromNib() {
super.awakeFromNib()
self.customview = UINib(nibName: "CustomViewNib", bundle: nil).instantiateWithOwner(self, options:nil)[0] as! UIView
self.customview?.frame = self.viewContainer.bounds
self.viewContainer.addSubview(self.customview!)
}
I am assuming the XIBs' structure is something like this
CustomView.xib
CustomView
UITextField -> linked to IBOutlet textField
other views
CustomViewController.xib
CustomView
If this is right, then your CustomView will be created but as it is not read from CustomView.xib it doesn't have any IBOutlets assigned.
However, if your CustomViewController.xib looks like following
CustomViewController.xib
CustomView
UITextField -> linked to IBOutlet textField of CustomView
then this should work. The IBOutlet of CustomView instance should be set by the CustomViewController.xib.
Better than setting any IBOutlets in the CustomViewController.xib would be to implement awakeAfterUsingCoder: in your CustomView and create a replacement object by loading your CustomView.xib in there. This way your CustomView remains truly custom and you don't have to edit other XIBs to change the structure, add/remove IBOutlets, etc.