Make a UIViewController appear only once

[DevinSnipes]

Hi everyone,

I'm creating an application in which I have a particular view, but I'd like that view to appear only the first time the application is loaded. This is the code I'm using now, but it's not working out to well. I have this code in the viewDidLoad of the initial ViewController.

- (void)viewDidLoad
{
    if (![@"1" isEqualToString:[[NSUserDefaults standardUserDefaults] objectForKey:@"ArrowFirst"]]) {
        [[NSUserDefaults standardUserDefaults] setValue:@"1" forKey:@"ArrowFirst"];
        [[NSUserDefaults standardUserDefaults] synchronize];
        
        MathViewController *math = [[MathViewController alloc] initWithNibName:@"MathViewController" bundle:nil];
        UIView *currentView = self.view;
        UIView *theWindow = [currentView superview];
        
        UIView *newView = math.view; 
        [currentView removeFromSuperview];
        [theWindow addSubview:newView];
        
        CATransition *animation = [CATransition animation];
        [animation setDuration:1.5];
        [animation setType:kCATransitionPush];
        [animation setSubtype:kCATransitionFromRight];
        [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionDefault]];
        
        [[theWindow layer] addAnimation:animation forKey:@"ChangeViews"];
        
        [math release];    
    }
    
    else{
        
    }
    
    [super viewDidLoad];
    
}

[baja_yu]

Please use [code] tags. Whenever I see a bunch of code like that I immediately lose interest in reading the post.

[Bertrand21]

Originally Posted by DevinSnipes

Hi everyone,

I'm creating an application in which I have a particular view, but I'd like that view to appear only the first time the application is loaded. This is the code I'm using now, but it's not working out to well. I have this code in the viewDidLoad of the initial ViewController.

- (void)viewDidLoad
{
if (![@"1" isEqualToString:[[NSUserDefaults standardUserDefaults] objectForKey:@"ArrowFirst"]]) {
[[NSUserDefaults standardUserDefaults] setValue:@"1" forKey:@"ArrowFirst"];
[[NSUserDefaults standardUserDefaults] synchronize];

MathViewController *math = [[MathViewController alloc] initWithNibName:@"MathViewController" bundle:nil];
UIView *currentView = self.view;
UIView *theWindow = [currentView superview];

UIView *newView = math.view;
[currentView removeFromSuperview];
[theWindow addSubview:newView];

CATransition *animation = [CATransition animation];
[animation setDuration:1.5];
[animation setType:kCATransitionPush];
[animation setSubtype:kCATransitionFromRight];
[animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionDefault]];

[[theWindow layer] addAnimation:animation forKey:@"ChangeViews"];

[math release];
}

else{

}

[super viewDidLoad];

}

First, Please use code tags...

Second, Is it the animation code that is not working or is it the check to see if it should show the view that is not working?

[DevinSnipes]

Originally Posted by Bertrand21

First, Please use code tags...

Second, Is it the animation code that is not working or is it the check to see if it should show the view that is not working?

I've updated this post with the code tags, I apologize for that. The animation code is working properly, it's just the check to see if the view should show.

[Bertrand21]

Originally Posted by DevinSnipes

I've updated this post with the code tags, I apologize for that. The animation code is working properly, it's just the check to see if the view should show.

Heres how I do mine:

-(BOOL)getShownHelpDialog{
	NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
	NSNumber *preference = [prefs objectForKey:@"ShownHelpDialog"];
	if(preference == nil){
		return NO;
		
	}
	else{
		return [preference boolValue];
	}
}

-(void)setShownHelpDialog:(BOOL)preference{
	NSNumber *pref = [NSNumber numberWithBool:preference];
	NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
	[prefs setObject:pref forKey:@"ShownHelpDialog"];
	[prefs synchronize];
}

in your viewDidLoad or viewDidAppear...

if(![self getShownHelpDialog]){
//Show the view here...
[self setShownHelpDialog:YES];
}