NSTimer/Stopwatch 일시 중지

Question

작업중인 프로젝트에서 일시 중지하고 계속할 스톱워치가 필요합니다. 지금까지 모든 기본 기능이 작동하지만 타이머를 일시 중지하고 다시 시작하는 방법을 찾지 못했습니다. 참고로, 나는 이미 다른 게시물을 확인했으며 작동하지 않았습니다. 코드 :

.H :

#import <UIKit/UIKit.h> 
#import <AVFoundation/AVFoundation.h> 

@interface Timer : UIViewController <AVAudioRecorderDelegate, AVAudioPlayerDelegate> 
{ 
    AVAudioRecorder *recorder; 
    AVAudioPlayer *player; 
} 

@property (weak, nonatomic) IBOutlet UIButton *recordPauseButton; 

@property (weak, nonatomic) IBOutlet UIButton *stopButton; 

@property (weak, nonatomic) IBOutlet UILabel *stopwatchLabel; 


-(IBAction)recordPauseTapped:(id)sender; 

-(IBAction)stopTapped:(id)sender; 

@end 

하는 .m : 귀하의 경우

#import "Timer.h" 

@interface SongIdeasRecording() 

@property (strong, nonatomic) NSTimer *stopWatchTimer; // Store the timer that fires  after a certain time 
@property (strong, nonatomic) NSDate *startDate; // Stores the date of the click on the start button 

@end 


@implementation Timer 

@synthesize stopButton, playButton, recordPauseButton, stopwatchLabel; 

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil 
{ 
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; 
    if (self) { 
    // Custom initialization 
} 
    return self; 
} 

- (void)updateTimer 
{ 
    // Timer is 1/10 of a second so thats what we add to stopwatch 
NSTimeInterval timeInterval = 0.1; 

// Create a date formatter 
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; 
[dateFormatter setDateFormat:@"HH:mm:ss.SSS"]; 
[dateFormatter setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0.0]]; 

// Take the time currently displayed on the stopwatch and add the time interval to it 
NSDate *oldDate = [dateFormatter dateFromString:self.stopwatchLabel.text]; 
NSDate *newDate = [oldDate dateByAddingTimeInterval:timeInterval]; 
//Get a string representation of the new date 
NSString *timeString = [dateFormatter stringFromDate:newDate]; 
self.stopwatchLabel.text = timeString; 
} 

- (IBAction)recordPauseTapped:(id)sender { 
    self.startDate = [NSDate date]; 

    // Create the stop watch timer that fires every 100 ms 
    self.stopWatchTimer = [NSTimer scheduledTimerWithTimeInterval:1.0/10.0 
                 target:self 
                selector:@selector(updateTimer) 
                userInfo:nil 
                 repeats:YES]; 



    // Stop the audio player before recording 
    if (player.playing) { 
     [player stop]; 
    } 

    if (!recorder.recording) { 
    AVAudioSession *session = [AVAudioSession sharedInstance]; 
    [session setActive:YES error:nil]; 

    // Start recording 
    [recorder record]; 
    [recordPauseButton setTitle:@"Pause" forState:UIControlStateNormal]; 

    } else { 

     // Pause recording 
     [self.stopWatchTimer invalidate]; 
     self.stopWatchTimer = nil; 
     [self updateTimer]; 
     [recorder pause]; 
     [recordPauseButton setTitle:@"Record" forState:UIControlStateNormal]; 

    } 

     [stopButton setEnabled:YES]; 
     [playButton setEnabled:NO]; 
} 
- (IBAction)stopTapped:(id)sender { 
    [recorder stop]; 

    AVAudioSession *audioSession = [AVAudioSession sharedInstance]; 
    [audioSession setActive:NO error:nil]; 

    [self.stopWatchTimer invalidate]; 
    self.stopWatchTimer = nil; 
    [self updateTimer]; 
} 

- (void) audioRecorderDidFinishRecording:(AVAudioRecorder *)avrecorder successfully: (BOOL)flag{ 
    [recordPauseButton setTitle:@"Record" forState:UIControlStateNormal]; 

    [stopButton setEnabled:NO]; 
    [playButton setEnabled:YES]; 
} 

- (IBAction)playTapped:(id)sender { 
    if (!recorder.recording){ 
    player = [[AVAudioPlayer alloc] initWithContentsOfURL:recorder.url error:nil]; 
    [player setDelegate:self]; 
    [player play]; 
    self.startDate = [NSDate date]; 
    stopwatchLabel.text = @"00:00:00.000"; 
    self.stopWatchTimer = [NSTimer scheduledTimerWithTimeInterval:1.0/10.0 
                  target:self 
                 selector:@selector(updateTimer) 
                 userInfo:nil 
                  repeats:YES]; 

    } 
    } 

- (void) audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag 
{ 
    [self.stopWatchTimer invalidate]; 
    self.stopWatchTimer = nil; 
    [self updateTimer]; 
    } 


@end 

Answer 1

, 당신은 녹화 버튼 원래 누른 것을 NSDate와 스톱워치 레이블의 값을 계산한다. 스톱워치 레이블 값을 다시 계산할 때마다 기록 단추가 눌린 원래 날짜가 반영되므로 타이머를 일시 중지 할 방법이 없습니다. 이 방법을 다음과 같이 변경하는 것이 좋습니다.

- (void)updateTimer 
{ 
    // Timer is 1/10 of a second so thats what we add to stopwatch 
    NSTimeInterval timeInterval = 0.1; 

    // Create a date formatter 
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; 
    [dateFormatter setDateFormat:@"HH:mm:ss.SSS"]; 
    [dateFormatter setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0.0]]; 

    // Take the time currently displayed on the stopwatch and add the time interval to it 
    NSDate *oldDate = [dateFormatter dateFromString:self.stopwatchLabel.text]; 
    NSDate *newDate = [oldDate dateByAddingTimeInterval:timeInterval]; 
    //Get a string representation of the new date and BOOM POW. 
    NSString *timeString = [dateFormatter stringFromDate:newDate]; 
    self.stopwatchLabel.text = timeString; 
} 

테스트하지 않았지만 제대로 작동하는지 확인하십시오. 문법상의 문제가 있다면 놀라지 않을 것입니다. 또한 self.stopwatchLabel.text에있는 문자열이 시작할 형식 (예 : 00 : 00 : 00.000)을 따르는 지 확인하십시오.

Answer 2

- (void) audioPlayerDidFinishPlaying:(AVAudioPlayer *)player 내부 코드에 주석을 달아보십시오.

제 생각 엔 - (IBAction)recordPauseTapped:(id)sender에 [player stop]이 호출되어 새 타이머를 무효로하는 - (void) audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag이 발생합니다.

Answer 3

- (IBAction)recordPauseTapped:(id)sender { 

    if ([stopwatchLabel.text isEqual: @"00:00:00.000"]) { 


    self.startDate = [NSDate date]; 

    // Create the stop watch timer that fires every 100 ms 
    self.stopWatchTimer = [NSTimer scheduledTimerWithTimeInterval:1.0/10.0 
                 target:self 
                selector:@selector(updateTimer) 
                userInfo:nil 
                 repeats:YES]; 



    // Stop the audio player before recording 
    if (player.playing) { 
    [player stop]; 
    } 

if (!recorder.recording) { 
    AVAudioSession *session = [AVAudioSession sharedInstance]; 
    [session setActive:YES error:nil]; 

    // Start recording 
    [recorder record]; 
    [recordPauseButton setTitle:@"Pause" forState:UIControlStateNormal]; 

} 
}else { 

    // Pause recording 
    [self.stopWatchTimer invalidate]; 
    self.stopWatchTimer = nil; 
    [self updateTimer]; 
    [recorder pause]; 
    [recordPauseButton setTitle:@"Record" forState:UIControlStateNormal]; 

} 

[stopButton setEnabled:YES]; 
[playButton setEnabled:NO]; 


}