Question

I have a class that inherits from UIView, and this class has some controls that I have placed on it in IB.

Then, in the NIB file for my main view controller, I placed a view, and changed the class to my subclass, and created an outlet for the subclass. However, when I run my application, the app does not display the UI that I put on the subclass, it is just blank.

I am getting the initWithCoder and awakeFromNib messages in the subclass, here is what the subclass .m file basically looks like:

#import "AnalyticsDetailView.h"

@implementation AnalyticsDetailView

- (id)initWithCoder:(NSCoder *)aDecoder
{
    self = [super initWithCoder:aDecoder];
    return self;
}

- (void)awakeFromNib
{
    [super awakeFromNib];
}

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self)
    {
        NSArray *v = [[NSBundle mainBundle] loadNibNamed:@"AnalyticsDetailView" owner:self options:nil];
        [self addSubview:[v objectAtIndex:0]];
    }

    return self;
}

- (void)dealloc 
{
    [super dealloc];
}

@end

I am not sure if the initWithFrame is correct, but since that method is not firing, I suspect that it doesn’t matter at this point. If I put a breakpoint in my app after I have seen the subclass methods fire, I can look at the outlet subclass and the frame is the same as what I have created in IB.

Anyone have any suggestions (missing code, bad IB connections, etc.) on what to look for that I have missed or am doing incorrectly? Thanks.

Answer 1

To get your interface to appear, you’ll need to explicitly instantiate a AnalyticsDetailView from your parent view controller.

So in somewhere like the viewDidLoad: or viewWillAppear: methods, you’ll add a line that says:

AnalyticsDetailView * newView = [[AnalyticsDetailView alloc] initWithFrame: CGRectMake(x,y,height,width)]; 
[parentView addSubview: newView];
[newView release]; // subview retains for us