Retain score value in labels between views

[Gallimattias]

I'm making a quiz app for the iPhone with two labels simply showing how many questions the user answered correct/wrong. When the player presses one of the answers, the label's value goes up one point.

I have tried to make the code global, so that it's retained between the views, coding it in the AppDelegate. The thing is that the labels are empty when going to the new view/question. When one of the answers are pressed, the correct updated value is shown in the labels, but then disappear when going to a new question. What should I do?

Explanation:

Fel = Wrong answer/label

Ratt = Correct answer/label


AppDelegate.h

@class StartViewController;

@interface StartAppDelegate : NSObject <UIApplicationDelegate> {

}

@property (nonatomic, readwrite) int fel;
@property (nonatomic, readwrite) int ratt;

@end


AppDelegate.h

@implementation StartAppDelegate

@synthesize window=_window;

@synthesize ratt;

@synthesize fel;


ViewController.h

@class StartAppDelegate;

@interface Fraga4ViewController : UIViewController {

StartAppDelegate *app;

IBOutlet UILabel *labelFel;
IBOutlet UILabel *labelRatt;

}

-(IBAction)Ratt;
-(IBAction)Fel;

@end


ViewController.m

#import "StartAppDelegate.h"

@implementation Fraga4ViewController

- (void)viewDidLoad {

app = [[UIApplication sharedApplication]delegate];

[super viewDidLoad];
}

-(IBAction)Ratt; {

app.ratt = app.ratt +1;
labelRatt.text = [NSString stringWithFormat:@"%i", app.ratt];

}

-(IBAction)Fel; {

app.fel = app.fel +1;
labelFel.text = [NSString stringWithFormat:@"%i", app.fel];

}

[Duncan C]

Originally Posted by Gallimattias

I'm making a quiz app for the iPhone with two labels simply showing how many questions the user answered correct/wrong. When the player presses one of the answers, the label's value goes up one point.

I have tried to make the code global, so that it's retained between the views, coding it in the AppDelegate. The thing is that the labels are empty when going to the new view/question. When one of the answers are pressed, the correct updated value is shown in the labels, but then disappear when going to a new question. What should I do?

Explanation:

Fel = Wrong answer/label

Ratt = Correct answer/label


AppDelegate.h

@class StartViewController;

@interface StartAppDelegate : NSObject <UIApplicationDelegate> {

}

@property (nonatomic, readwrite) int fel;
@property (nonatomic, readwrite) int ratt;

@end


AppDelegate.h

@implementation StartAppDelegate

@synthesize window=_window;

@synthesize ratt;

@synthesize fel;


ViewController.h

@class StartAppDelegate;

@interface Fraga4ViewController : UIViewController {

StartAppDelegate *app;

IBOutlet UILabel *labelFel;
IBOutlet UILabel *labelRatt;

}

-(IBAction)Ratt;
-(IBAction)Fel;

@end


ViewController.m

#import "StartAppDelegate.h"

@implementation Fraga4ViewController

- (void)viewDidLoad {

app = [[UIApplication sharedApplication]delegate];

[super viewDidLoad];
}

-(IBAction)Ratt; {

app.ratt = app.ratt +1;
labelRatt.text = [NSString stringWithFormat:@"%i", app.ratt];

}

-(IBAction)Fel; {

app.fel = app.fel +1;
labelFel.text = [NSString stringWithFormat:@"%i", app.fel];

}

Add code to your view controller's viewWillAppear methods that convert the score to a string and display it in the label. That's standard procedure.

[Gallimattias]

Thanks for your answer. I'm a bit of a noob. How do you write this code?

Originally Posted by Duncan C

Add code to your view controller's viewWillAppear methods that convert the score to a string and display it in the label. That's standard procedure.

[Duncan C]

Originally Posted by Gallimattias

Thanks for your answer. I'm a bit of a noob. How do you write this code?

Oh come on!

Add this line, that you already wrote (or copy-and-pasted) to your viewWillAppear method:

labelFel.text = [NSString stringWithFormat:@"%i", app.fel];

If you don't have a viewWillAppear method, search for it in the Xcode documentation. Copy the method definition into your .m file, and insert the line of code above.

You need to get a book on beginning Objective C/iOS development and do some reading. If you are as much of a noob as that, you're going to drive yourself (and us) crazy with not knowing how to do anything.