HELP! Store time from NSTimer for next ViewController

Applekuchen · 11-14-2010, 02:59 AM

Hey,

I'm becomming desperate. I've got a NSTimer in my second ViewController.

Code:

-(IBAction)start {
	
	myticker = [NSTimer scheduledTimerWithTimeInterval:0.01 target:self selector:@selector(showActivity) userInfo:nil repeats:YES];
	
}

Code:

-(IBAction)stop {
	
		[myticker invalidate];
		
}

Code:

-(void)showActivity {
	
	float currentTime = [time.text floatValue];
	newTime = currentTime + 0.01;
	time.text = [NSString stringWithFormat:@"%.2f", newTime];        
}

newTime ist an instance variable (float) and time is the label where the time is shown.

Before calling the third ViewController, I stored the time like this:

Code:

-(IBAction)right {
	
	[self stop];
		
	ThirdViewController *screen = [[ThirdViewController alloc] initWithNibName:nil bundle:nil];
	screen.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
	screen.timelabel.text = [NSString stringWithFormat: @"%.2f", newTime];
	[self presentModalViewController:screen animated:YES];
	[screen release];
	
}

I stopped the timer and gave the time to the instance variable timelabel (UILabel).
In the third ViewController I created the same NSTimer with the same methods.
But when I open the third View Controller the timer starts from 0 again.

What's wrong about my code?

BinHex · 11-14-2010, 06:09 AM

I don't think the UILabel outlet is initiated until the view is loaded. Try to store the time value in a thirdviewcontroller property (screen.timeproperty = [NSString stringWithFormat: @"%.2f", newTime]) that's not an outlet. Then populate the outlet with the timeproperty in viewDidLoad or viewWillLoad.

Applekuchen · 11-19-2010, 03:10 PM

Now I've got in my SecondViewController:

Code:

-(IBAction)start {
	
	myticker = [NSTimer scheduledTimerWithTimeInterval:0.01 target:self selector:@selector(showActivity) userInfo:nil repeats:YES];
	
}


-(IBAction)stop {
	
		[myticker invalidate];
		
}

-(void)showActivity {
	
	currentTime = [time.text floatValue];
	currentTime += 0.01;
	time.text = [NSString stringWithFormat:@"%.2f", currentTime];        
}



-(IBAction)right {
	
	[self stop];
		
	ThirdViewController *screen = [[ThirdViewController alloc] initWithNibName:nil bundle:nil];
	screen.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
	screen.secondTime = [NSString stringWithFormat: @"%.2f", currentTime];
	[self presentModalViewController:screen animated:YES];
	[screen release];
	
}

secondTime is a float ivar in the ThirdViewController and currentTime is a float ivar in the SecondViewController

In my ThirdViewController I've got:

Code:

-(IBAction)start {
	
	myticker = [NSTimer scheduledTimerWithTimeInterval:0.01 target:self selector:@selector(showActivity) userInfo:nil repeats:YES];
	
}


-(IBAction)stop {
	
	[myticker invalidate];
	
}

-(void)showActivity {
	
	float currentTime = [timelabel.text floatValue];
	currentTime += 0.01;
	timelabel.text = [NSString stringWithFormat:@"%.2f", secondTime];        
}

And in the viewDidLoad from the ThirdViewController:

Code:

[self start];
timelabel.text = [NSString stringWithFormat:@"%.2f", secondTime];

When I build the project, an error appears:

error: incompatible type for argument 1 of 'setSecondTime:'

What's wrong?

Applekuchen · 11-19-2010, 04:10 PM

I solved the problem.

It has to be

Code:

screen.secondTime = self.currentTime;