Loading a Nib file, Programmatically (Objective-C)

If you want to load a Nib file at run time by simply allocating and initializing a View object, then you should take a rather strange approach to how you create your class files. Suppose you have a subclass of UIView called MyView and what you want is to allocate and initialize an instance of MyView but have MyView load its outlets and actions from a Nib file. Well, you will need to do two things:

  1. In Interface Builder, change the class name of your View object to MyView.
  2. Then you will have to override MyView’s initWithFrame method like so:

- (id)initWithFrame:(CGRect)paramFrame
{

NSArray *arrayOfViews = [[NSBundle mainBundle] loadNibNamed:@"MyView"
owner:nil
options:nil];

if ([arrayOfViews count] < 1){
[self release];
return nil;
}

MyView *newView = [[arrayOfViews objectAtIndex:0] retain];
[newView setFrame:paramFrame];

[self release];
self = newView;

return self;

 

}

Then you can go ahead and initialize your view like this:

MyView *myView = [[MyView alloc] initWithFrame:self.view.bounds];
[self.view addSubview:myView];
[myView release];

And here an instance of MyView will get added to the view of a view controller. That simple. I hope it helps some of you out there 🙂

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