Display each object in NSArray for 2 seconds - iphone

Question

I have the following problem: I have an NSArray that contains 5 objects. I want to display each item for 2 seconds using NSTimer, and release the timer after displaying the last item in the array.
Country = [NSArray arrayWithObjects:#"Aus",#"India",#"Pak",#"China",#"Japan", nil];
cntcount = [Country count];
NSLog(#"concount=%i", cntcount);
[NSTimer scheduledTimerWithTimeInterval:2.0 target:self selector:#selector(startTime) userInfo:nil repeats:YES];
But I'm not getting another step. What should I do in the starttime() function? Please help!
//
// AppViewController.m
// NSTimerExample
//
#import "AppViewController.h"
#interface AppViewController ()
#end
#implementation AppViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
Country = [NSArray arrayWithObjects:
#"Aus", #"India", #"Pak", #"China", #"Japan", nil];
tempValue = 0;
NSTimer *popupTimer = [NSTimer scheduledTimerWithTimeInterval:2.0
target:self
selector:#selector(startTime:)
userInfo:nil
repeats:YES];
NSRunLoop *runner = [NSRunLoop currentRunLoop];
[runner addTimer:popupTimer forMode:NSDefaultRunLoopMode];
}
- (void)startTime:(NSTimer *)theTimer {
int cntcount = [Country count];
if(tempValue < cntcount) {
NSString *objectName = [Country objectAtIndex:tempValue];
NSLog(#"objectName=%#", objectName);
tempValue++;
} else {
[theTimer invalidate];
theTimer = nil;
// or you can reset tempValue to 0.
}
}
After displaying the last item I want to release timer as it is no longer needed, but I'm getting and EXC_BAD_ACCESS exception.

Answer 1

Do like this,
In .h
int tempValue;
In .m
tempValue=0;
NSTimer *popupTimer = [NSTimer scheduledTimerWithTimeInterval:2.0 target:self selector:#selector(startTime:) userInfo:nil repeats:YES];;
NSRunLoop *runner = [NSRunLoop currentRunLoop];
[runner addTimer:popupTimer forMode: NSDefaultRunLoopMode];
In timer action method:
-(void)startTime:(NSTimer*)theTimer {
if(tempValue< Country.count) {
// Display array object eg: label.text=[Country objectAtIndex:tempValue];
tempValue++;
} else {
[theTimer invalidate];
theTimer=nil;
// or you can reset the tempValue into 0.
}
}

Answer 2

#import "AppViewController.h"
#interface AppViewController ()
#end
#implementation AppViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
Country=[[NSArray alloc]initWithObjects:#"Aus",#"India",#"Pak",#"China",#"Japan", nil];
tempValue=0;
NSTimer *popupTimer = [NSTimer scheduledTimerWithTimeInterval:2.0 target:self selector:#selector(startTime:) userInfo:nil repeats:YES];;
NSRunLoop *runner = [NSRunLoop currentRunLoop];
[runner addTimer:popupTimer forMode: NSDefaultRunLoopMode];
}
- (void)startTime:(NSTimer*)theTimer {
if(tempValue< Country.count) {
NSString *objectname=[Country objectAtIndex:tempValue];
NSLog(#"objectname is %#",objectname);
tempValue++;
} else {
[theTimer invalidate];
theTimer=nil;
// or you can reset the tempValue into 0.
}
}
- (void)viewDidUnload {
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}
#end
thanks to Tony and this code is working properly