the sampleUI example is strange

baryonicdm · December 25th, 2011, 03:11 PM

in 39 page

the book says like below

#import <UIKit/UIKit.h>
@interface ViewController : UIViewController {
int counter;
}
@property (weak, nonatomic) IBOutlet UILabel *myLabel;
- ( IBAction )buttonPressed:(id)sender;
@property (weak, nonatomic) IBOutlet UISlider *mySlider;
- ( IBAction )sliderMoved:(id)sender;
@end

but this ends with error.

but the source code provided outside of the book itself is like below

#import <UIKit/UIKit.h>
@interface SampleUIViewController : UIViewController {
UIViewController {
UILable *myLable;
IBOoutlet UISLider *mySlider;
int counter;
}
- ( IBAction )buttonPressed:(id)sender;
- ( IBAction )sliderMoved:(id)sender;
@property (strong, nonatomic) IBOutlet UILabel *myLabel
@end

and this source seems to be working fine.

why has the book error data?? the book said that the code will work fine but it`s kinda not.

bpeasey · December 25th, 2011, 06:19 PM

[Update: I submitted this to Wrox as Errata. #111228-000495]

Hi There!

The code in the book for this example worked fine for me. But I decided to download the code as well and I think it's messed up. The SampleUIViewController.h file contains three interface implementations(each starting with the "#import <UIKit/UIKit.h>") The last one looks like mine that I created from the books instructions.

Code:

#import <UIKit/UIKit.h>

@interface SampleUIViewController : UIViewController {
    UILabel *myLabel;
    IBOutlet UISlider *mySlider;
    int counter;
}
- (IBAction)buttonPressed:(id)sender;
- (IBAction)sliderMoved:(id)sender;

@property (strong, nonatomic) IBOutlet UILabel *myLabel;

@end

#import <UIKit/UIKit.h>
@interface SampleUIViewController : UIViewController {
UIViewController {
UILable *myLable;
IBOoutlet UISLider *mySlider;
int counter;
}
- ( IBAction )buttonPressed:(id)sender;
- ( IBAction )sliderMoved:(id)sender;
@property (strong, nonatomic) IBOutlet UILabel *myLabel 
@end

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController {
    
    int counter;
}

@property (weak, nonatomic) IBOutlet UILabel *myLabel;

- (IBAction)buttonPressed:(id)sender;

@property (weak, nonatomic) IBOutlet UISlider *mySlider;

- (IBAction)sliderMoved:(id)sender;

@end

baryonicdm · January 2nd, 2012, 02:03 PM

sorry. i`ve just tried again and it works.

i guess i was stupid to wrongly spell something.

thanks for your great book!!

some of my friends has bought your book too!!