How to pass a variable to the next view? - iphone

Question

My app has an variable called int antalratt, which is the number of correct answers in that view. Now I want to pass that variable to the next view, where I want to get the number of correct answers to be shown! I know how to get an integer to a label text though!
The int antalratt is written in the firstviewcontroller.m, how do I make it "global" so that I can use it in the secondviewcontroller?
Thanks in advance!

Answer 1

make a variable in the public interface of secondviewcontroller.h
#property (nonatomic, strong) NSNumber *correctAnswers;
synthesize it in .m and then pass the value of antalratt in firstviewcontroller with secondviewcontroller.correctAnswers = [NSNumber numberWithInt:antalratt];
to secondviewcontroller. then set the labeltext

Answer 2

Method 1:
RootViewController
-(IBAction)nextPage{
int antalratt = 12; // Value to be transfered
FirstViewController * fvc = [[FirstViewController alloc] initWithNibName:#"FirstViewController" bundle:nil];
fvc.answer = antalratt;
[self presentModalViewController:fvc animated:YES];
[fvc release];
}
FirstViewController
#interface FirstViewController : UIViewController
{
int answer;
}
#property(nonatomic,assign) int answer;
#implementation FirstViewController
#synthesize answer;
- (void)viewDidLoad
{
[super viewDidLoad];
NSLog(#"%d",answer); // //displays answer on log
}
#end
Method 2 (AppDelegate)
AppDelegate
#interface AppDelegate : UIResponder <UIApplicationDelegate>
{
int antalratt;
}
#property(nonatomic ,assign) int antalratt;
RootViewController
-(IBAction)nextPage{
int antalratt = 12; // Value to be transfered
AppDelegate * delegate = [[UIApplication sharedApplication] delegate];
delegate.antalratt = antalratt;
FirstViewController * fvc = [[FirstViewController alloc] initWithNibName:#"FirstViewController" bundle:nil];
[self presentModalViewController:fvc animated:YES];
[fvc release];
}
FirstViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
AppDelegate * delegate = [[UIApplication sharedApplication] delegate];
NSLog(#"%d",delegate.antalratt); //displays answer on log
}
Method 3 (NSUserDefaults)
RootViewController
-(IBAction)nextPage{
int antalratt = 12; // Value to be transfered
[[NSUserDefaults standardUserDefaults] setInteger:antalratt forKey:#"answer"];
FirstViewController * fvc = [[FirstViewController alloc] initWithNibName:#"FirstViewController" bundle:nil];
[self presentModalViewController:fvc animated:YES];
[fvc release]; }
FirstViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
int ans = [[[NSUserDefaults standardUserDefaults] objectForKey:#"answer"] intValue];
NSLog(#"%d",ans); //displays answer on log
}

Answer 3

filename *detailViewController = [[filename alloc] initWithNibName:#"filename" bundle:nil];
detailViewController.audio=#"yourData";
[self presentModalViewController:detailViewController animated:YES];
[detailViewController release];
Declare in filename.h
NSString *audio;
#property(nonatomic,retain) NSString *audio;
and filename.m
#synthesize audio;
-(void) ViewDidLoad
{
NSLog(#"Audio = %#",audio); // if ur variable is integer declare %d in nslog.
}
thats all

Answer 4

//
view1.h
#interface view1 : UIView{
NSString *passingVariable;
}
#property (nonatomic, strong) NSString *passingVariable;
#end
//
view1.m
#synthsize passingVariable;
#implementation view1
#end
// in another view
view2.m
#import "view1.h"
#implementation view2
-(IBAction)changeview
{
view1 *myview = [[view1 alloc]init];
myview.passingVariable = [NSString stringWithString:#"Hello Variable"];
[self.navigationController pushViewController:myview animated:YES];
}
#end