Question

Here i used this code to view the next value in the array,

-(IBAction)changenext
{
static int j = 0;
if (j >arcount)
{
   j = 0;
}
 lb1.text=[NSString stringWithFormat:[artext objectAtIndex:j]];
 imager.image=[arimage objectAtIndex:j];
 aplayer=[[AVAudioPlayer alloc]initWithData:[arsound objectAtIndex:j] error:nil];

j++;
}

How to view the previous array value by other button click?Please help me to solve..

Answer 1

-(IBAction)change_next_or_prev:(id)sender
{
static int j = 0;
if(sender == btnNext)
    j++;
else if(sender == btnPrev)
    j--;
if (j >= arcount)
{
   j = 0;
}
else if(j < 0)
{
   j = arcount - 1;
}
 lb1.text=[NSString stringWithFormat:[artext objectAtIndex:j]];
 imager.image=[arimage objectAtIndex:j];
 aplayer=[[AVAudioPlayer alloc]initWithData:[arsound objectAtIndex:j] error:nil];
}

link both button to the same action.