How to show count down timer on cell in iphone? - iphone

Question

** I show count down timer on cell when i long press on cell.but the problem is that when i click on row timer started but suddenly when i click on second cell timer stop of previous cell and start timer new cell which i click ,but the main functionality which i need is that i have to show running previous timer and current timer . please any one give me right way for that.**
-(void)handleLongPress:(UILongPressGestureRecognizer *)gestureRecognizer
{ AppDelegate *app=(AppDelegate *)[UIApplication sharedApplication].delegate;
CGPoint p = [gestureRecognizer locationInView:ChatTable];
NSIndexPath *indexPath = [ChatTable indexPathForRowAtPoint:p];
if ([[[userArray valueForKey:#"sender_id"] objectAtIndex:indexPath.row]isEqualToString: app.userId]) {
}
else{
if (gestureRecognizer.state == UIGestureRecognizerStateBegan)
{
if ([imageCache objectForKey:[NSString stringWithFormat:#"%d",indexPath.row]]==NULL) {
}
else
{
self.picId=[[userArray valueForKey:#"pic_id"] objectAtIndex:indexPath.row];
self.imageName=[[userArray valueForKey:#"imagename"] objectAtIndex:indexPath.row];
ChatTable.userInteractionEnabled=NO;
// self.navigationController.navigationBarHidden=YES;
image=[[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 320, 480)];
self.pickerValue=[[userArray valueForKey:#"seconds"] objectAtIndex:indexPath.row];
image.image=[imageCache objectForKey:[NSString stringWithFormat:#"%d",indexPath.row]];
[self.view addSubview:image];
[self showTableTime:indexPath];
}
}
else if (gestureRecognizer.state == UIGestureRecognizerStateEnded) {
UITableViewCell * myCell = [ChatTable cellForRowAtIndexPath:indexpathForTimer];
UILabel * myLabel = (UILabel *)[myCell viewWithTag:101];
myLabel.text=#"";
// self.navigationController.navigationBarHidden=NO;
[image removeFromSuperview];
}
}
}
-(void)showTableTime:(NSIndexPath *)indexPath
{
secondsLeft=[self.pickerValue integerValue];
indexpathForTimer=indexPath;
[self countDownTimer];
}
- (void)countDownTimer {
timer =[NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:#selector(updateCounter:) userInfo:nil repeats:YES];
}
- (void)updateCounter:(NSTimer *)theTimer {
UITableViewCell * myCell = [ChatTable cellForRowAtIndexPath:indexpathForTimer];
UILabel * myLabel = (UILabel *)[myCell viewWithTag:101];
if (secondsLeft >0) {
secondsLeft --;
UILabel * myLabel = (UILabel *)[myCell viewWithTag:101];
myLabel.text=[NSString stringWithFormat:#"0%d",secondsLeft];
}
else if(secondsLeft==0)
{
[self.image removeFromSuperview];
[timer invalidate];
ChatTable.userInteractionEnabled=YES;
myLabel.text=#"";
[self SendRequsetToServerOfSeenImage];
}
else
{
}
}

Answer 1

The problem is that you only store one timer/indexpath pair (you only use the variables "timer" and "indexPathForTimer"). As soon as you activate a second cell, the variable indexPathForTimer will be overwritten with the indexPath for the second cell, so you only update the second cell.
I would suggest you convert the variable timer into an NSMutableArray and indexPathForTimer into an NSMapTable and then do
// code to init the map table, perform this where you initialize your variables
// (you may want to use weakToStrong or weakToWeak depending on your memory
// management)
indexPathForTimer = [NSMapTable strongToStrongObjectsMapTable];
// use this code to create your timer instance with reference to the index path
// for which it was instantiated
NSTimer* newTimer = [NSTimer timerWithTimerInterval:1.0 target:self selector:#selector(updateCounter:) userInfo:nil repeats:YES];
[timer addObject:newTimer];
[indexPathForTimer addObject:indexPath forKey:newTimer];
[NSRunLoop mainRunLoop] addTimer:newTimer forModes:NSRunLoopCommonModes];
In your updateCounter: method, you can then get the real index path like so
currentIndexPath = [indexPathForTimer objectForKey:theTimer];

Answer 2

Try this
- (void)countDownTimer
{
timer =[NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:#selector(updateCounter:) userInfo:nil repeats:YES];
[[NSRunLoop mainRunLoop]addTimer:timer forMode:NSRunLoopCommonModes];
}

Answer 3

I think you want to run multiple timer on view or on each cell. but it become complicated to handle multiple timers that running on different cells.