objective-cuitableviewxibcustom-cellawakefromnib

Calling awakeFromNib from xib file in the main ViewController


I have a custom cell in a UITableView using an xib file. I programatically created a UILabel with a height of 200 and a width of 50. When I do an NSLog in the customCell.m of the label's width and height, it gives me w: 50 and h: 200. But when I do an NSLog in mainViewController.m it gives me 0 for the height and width.

Not sure why it does that. I need to get the real height of the label in the mainViewController.m

Here's my code:

customCell.m

- (void)awakeFromNib
{
    self.label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 50, 200)];
    [self.label setText:@"This is a label"];
    [self.myView addSubview:self.label];

    NSLog(@"%f", self.label.frame.size.height);  // Results: 200.0000
}

mainViewController.m

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.

    customCell *cellVC = [[cutsomCell alloc] init];

    NSLog(@"%f, %f", cellVC.label.frame.size.height); // Results: 0.0000
}

Isn't awakeFromNib supposed to get called the mainViewController.m at viewDidLoad if I use an xib file? If not, how do I call it in viewDidLoad?


Solution

  • awakeFromNib is an initializer called when you load from nib..ie you add a view and change its class to your custom class in storyboard/nib and this porcess will call awakeFromNib method..not programatically

    When done programatically use init method for the purpose or a custom initializer

    -(id)init
    {
        //class super init calls
    
        //then method calls
        self.label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 50, 200)];
        [self.label setText:@"This is a label"];
        [self.myView addSubview:self.label];
    
        //return self
    }
    

    Example

    - (id) init {
        // Call superclass's initializer
        self = [super init];
        if(self) {
            self.label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 50, 200)];
            [self.label setText:@"This is a label"];
            [self.myView addSubview:self.label];
        }
        return self;
    }