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iOS

Posted by Trent Burkenpas
Trent Burkenpas
22,388 Points

CGRect and Frame help!

So im connecting predictionLabel in VeiwController.h to VewController.m. But for some reason it is not connecting. Im not getting the same results that Amit is getting in the video. The padding around the element predictionLabel should be expanded. So the code :

- (void)viewDidLoad
{
    [super viewDidLoad];

    self.predictionLabel.frame = CGRectMake(50, 200, 100, 100);
}

This is where i mess up and i'm getting different results then Amit. This seem so impossible for me to explain :( hopefully you can help me out by looking at my code

for ViewConroller.h 

#import <UIKit/UIKit.h>

@interface TBViewController : UIViewController
@property (strong, nonatomic) IBOutlet UILabel *predictionLabel;
- (IBAction)buttonPressed;

@end

VeiwController.m

#import "TBViewController.h"

@interface TBViewController ()

@end

@implementation TBViewController

- (void)viewDidLoad
{
    [super viewDidLoad];

    self.predictionLabel.frame = CGRectMake(50, 200, 100, 100);
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (IBAction)buttonPressed {
    self.predictionLabel.text = @"YES";
}
@end

And here is the link to the video : http://teamtreehouse.com/library/build-a-simple-iphone-app-ios7-2/understanding-views-and-view-controllers/cgrect-and-frame

Any help would be awesome! If you have no idea what i'm trying to explain, i'm sorry, i'm struggling to explain the issue :p

-Thanks

3 Answers

John W
John W
21,558 Points
John W
John W
21,558 Points

viewDidLoad happens before the frame is finalized. You need to set the frame rect after that in viewDidAppear, as explained in the video starting just before the 8-minute mark.

Trent Burkenpas
Trent Burkenpas
22,388 Points
Trent Burkenpas
Trent Burkenpas
22,388 Points

hmmm interesting, my results were quite different then Amit's. But i guess it really doesn't matter because he was just showing what frame can do. In the video at 11:57, you see how the text "It is decidedly so" is centered in the label box. Mine is more to the left. Im sure that is not a matter of code, but something I did in the storyboard. Is there a reason my text in more to the left and not centered? Btw thanks for all the help, I truly appreciate it.

Trent Burkenpas
Trent Burkenpas
22,388 Points
Trent Burkenpas
Trent Burkenpas
22,388 Points

NVM I figured it out, thanks for the help!