사과의 카운트 다운 타이머와 같은 타이머를 만드는 법을 모르겠다.

Question

테이블 뷰 컨트롤러와 셀로 연결된 세부보기 컨트롤러가 & 네비게이션 바있다. 자세히보기 컨트롤러에서 사용자가 지정한 간격으로 카운트 다운 타이머입니다. 셀을 처음 클릭 할 때 디테일 뷰 컨트롤러를 가져올 때 작동하지만 같은 셀을 탭하고 다시 탭하면 처음부터 다시 시작합니다. 나는 이유를 안다. 그러나 나는 그것을 고칠 방법을 모른다 (이 포스트의 끝에). 여기 내 코드입니다 :의 tableview 세포에 넣어

작업 = 객체

되지 않은 작업의 배열이

완료 작업의

completedArray = 배열 ​​객체

TableViewController.m

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{ 
cellSubclassCell *cell = [tableView dequeueReusableCellWithIdentifier:@"UITableViewCell"]; 
    if (!cell) 
     cell = [[cellSubclassCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:@"UITableViewCell"]; 

    if([indexPath section] == 0){ 
    cell.textLabel.text = [[[self.taskArray objectAtIndex:[indexPath row]] taskName] uppercaseString]; 

    cell.imageView.image = [UIImage imageNamed:@"unchecked.png"]; 
     cell.imageView.highlightedImage = [UIImage imageNamed:@"uncheckedhighlighted.png"]; 
     [cell setAccessoryType:UITableViewCellAccessoryDisclosureIndicator]; 
     [cell setBackgroundColor:[UIColor colorWithRed:236.0/255 green:240.0/255 blue:241.0/255 alpha:1.0f]]; 
     cell.textLabel.textColor = baseColor; 

     NSString *detailText = [[self.taskArray objectAtIndex:[indexPath row]] timeIntervalString]; 
     cell.detailTextLabel.text = detailText; 
       [[cell detailTextLabel] setFont:[UIFont fontWithName:@"Avenir-Black" size:12]]; 
     [[cell textLabel] setFont:[UIFont fontWithName:@"AvenirNext-DemiBold" size:16]]; 
[cell.contentView setAlpha:1]; 
    } else if ([indexPath section] == 1) { 
    cell.textLabel.text = [[[self.completedArray objectAtIndex:[indexPath row]] taskName] uppercaseString]; 

    cell.imageView.image = [UIImage imageNamed:@"checked.png"]; 
     [cell setAccessoryType:UITableViewCellAccessoryDisclosureIndicator]; 
     [cell setBackgroundColor:[UIColor colorWithRed:236.0/255 green:240.0/255 blue:241.0/255 alpha:1.0f]]; 
     cell.textLabel.textColor = baseColor; 
     NSString *detailText = [[self.completedArray objectAtIndex:[indexPath row]] timeIntervalString]; 
     cell.detailTextLabel.text = detailText; 
     [[cell detailTextLabel] setFont:[UIFont fontWithName:@"Avenir-Black" size:12]]; 
     [[cell textLabel] setFont:[UIFont fontWithName:@"AvenirNext-DemiBold" size:16]]; 
     [cell.contentView setAlpha:0.5]; 
    } 
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(handlechecking:)]; 
    //cell.contentView 
    [cell.imageView addGestureRecognizer:tap]; 
    cell.imageView.userInteractionEnabled = YES; 
    return cell; 
    } 
-(void)handlechecking:(UITapGestureRecognizer *)t{ 

     CGPoint tapLocation = [t locationInView:self.tableView]; 
     NSIndexPath *tappedIndexPath = [self.tableView indexPathForRowAtPoint:tapLocation]; 
     NSIndexPath *newIndexPath = nil; 

     if (tappedIndexPath.section == 0) { 

      NSUInteger newRowIndex = self.completedArray.count; 
      [self.completedArray addObject:[self.taskArray objectAtIndex:tappedIndexPath.row]]; 
      [self.taskArray removeObject:[self.taskArray objectAtIndex:tappedIndexPath.row]]; 
      newIndexPath = [NSIndexPath indexPathForRow:newRowIndex inSection:1]; 

     } else { 

      NSUInteger newRowIndex = self.taskArray.count; 
      [self.taskArray addObject:[self.completedArray objectAtIndex:tappedIndexPath.row]]; 
      [self.completedArray removeObject:[self.completedArray objectAtIndex:tappedIndexPath.row]]; 
      newIndexPath = [NSIndexPath indexPathForRow:newRowIndex inSection:0]; 
     } 
     [self.tableView beginUpdates]; 
     [self.tableView insertRowsAtIndexPaths:@[newIndexPath] withRowAnimation:UITableViewRowAnimationAutomatic]; 
     [self.tableView deleteRowsAtIndexPaths:@[tappedIndexPath] withRowAnimation:UITableViewRowAnimationAutomatic]; 
     [self.tableView endUpdates]; 

} 
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{ 
    NSInteger num = 0; 
    if (section == 0) { 
     num = self.taskArray.count; 
    } else { 
     num = self.completedArray.count; 
    } 
    return num; 
} 
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{ 
    Tasks *task = [[Tasks alloc]init]; 
    if (indexPath.section == 0){ 
    task.taskName = [[self.taskArray objectAtIndex:[indexPath row]] taskName]; 
     task.timeInterval = [[self.taskArray objectAtIndex:[indexPath row]] timeInterval]; 
    task.dateCreated = [[self.taskArray objectAtIndex:[indexPath row]] dateCreated]; 
    } else if (indexPath.section == 1){ 
     task.taskName = [[self.completedArray objectAtIndex:[indexPath row]] taskName]; 
     task.timeInterval = [[self.completedArray objectAtIndex:[indexPath row]] timeInterval]; 
     task.dateCreated = [[self.completedArray objectAtIndex:[indexPath row]] dateCreated]; 
    } 
    DetailViewController *dvc = [[DetailViewController alloc]init]; 
    [dvc setTestTask:task]; 
    [[self navigationController] pushViewController:dvc animated:YES]; 
} 

객체 = taskArray

DetailViewController.m

-(IBAction)startTimer:(id)sender{ 
    [sender setHidden:YES]; 
    [pauseButton setHidden:NO]; 
    [continueButton setHidden:NO]; 
     gregorianCalendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar]; 
     self.date1 = [NSDate dateWithTimeInterval:[testTask timeInterval] sinceDate:[NSDate date]]; 

     timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(timerAction:) userInfo:nil repeats:YES]; 
    [timer fire]; 

} 
-(void)viewWillAppear:(BOOL)animated{ 
    [super viewWillAppear:animated]; 

    [timerLabel setFont:[UIFont fontWithName:@"BebasNeue" size:60]]; 
    [[self navigationItem] setTitle:[testTask taskName]]; 
    if (startButton.hidden == NO){ 
     [pauseButton setHidden:YES]; 
     [continueButton setHidden:YES]; 
    } else { 
     [pauseButton setHidden:NO]; 
     [continueButton setHidden:NO]; 
    } 
     timeRemaining = [NSString stringWithFormat:@"%02d:%02d:%02d", [components hour], [components minute], [components second]]; 
    timerLabel.text = timeRemaining; 
    [timerLabel setNeedsDisplay]; 
    [self.view setNeedsDisplay]; 
} 
-(void)viewWillDisappear:(BOOL)animated{ 
    [super viewWillDisappear:animated]; 

    [testTask setTaskName:[testTask taskName]]; 
    [testTask setTimeInterval:[testTask timeInterval]]; 

} 
-(void)timerAction:(NSTimer *)t{ 
    NSDate *now = [NSDate date]; 
    components = [gregorianCalendar components:NSHourCalendarUnit|NSMinuteCalendarUnit|NSSecondCalendarUnit fromDate:now toDate:self.date1 options:0]; 

    timeRemaining = nil; 
    if([now compare:self.date1] == NSOrderedAscending){ 
     timeRemaining = [NSString stringWithFormat:@"%02d:%02d:%02d", [components hour], [components minute], [components second]]; 
     NSLog(@"works %@", timeRemaining); 
    } else { 
     timeRemaining = [NSString stringWithFormat:@"00:00:00"]; 
     [self.timer invalidate]; 
     self.timer = nil; 
     if (self.alertView == NULL){ 
     self.alertView = [[UIAlertView alloc]initWithTitle:[testTask taskName] message:@"Time is up!" delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil]; 
     [alertView performSelectorOnMainThread:@selector(show) withObject:nil waitUntilDone:YES];  
     NSLog(@"ended"); 
     } 
    } 
    timerLabel.text = timeRemaining; 
    [timerLabel setNeedsDisplay]; 
    [self.view setNeedsDisplay]; 
} 
- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex{ 
    self.alertView = NULL; 
} 

기본적으로 응용 프로그램이 백그라운드에있을 때 타이머가 계속되어야합니다 (계산 된 시간에 따라 경고가 전송됩니다). 다시 말해서 셀을 다시 클릭 할 때 타이머가 계속되어야 함을 의미합니다. 이 작업을 수행하지 않는 이유는 셀 (또는 행)을 누를 때마다 DetailViewController가 할당되기 때문입니다. 나는 이것을 고치는 방법을 모르므로 시간을 절약하고 내가 좋아하는대로 시작/일시 정지 할 수 있습니다.

Answer 1

타이머를 쳤을 때 타이머를 쳤던 시간을 기억해야합니다. NSUserDefaults를 통해 저장하는 것이 가장 쉽지만 여러 타이머를 사용할 수 있으므로 간단한 CoreData 앱을 작성하는 것이 더 깔끔할 수 있습니다.

논리 (I 올바르게 문제를 이해한다면) : 도움이

1. User pushes to DetailView and timer starts 
2. User wants to pop back 
    2.1 Save the date the timer started to the task record 
3. User wants to go back to same task 
    3.1 Load the NSDate of when the timer started from disk 
    3.2 Calculate the offset from then until now 
    3.3 Add that to the clock 
    3.4 Start the timer with the offset added 

희망을.