如何在我啓動應用程序時恢復時間計數器值

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我希望在啓動應用程序時恢復時間計數器值。首先，我的label值比關閉應用程序後的05:00時間短，但是當我啓動應用程序時，該時間計時器計數從05:00開始。請幫我如何在我啓動應用程序時恢復時間計數器值

int timeSec,timeMin ; 
- (void)viewDidLoad { 
    timeSec=0; 
    timeMin=0; 
    [self StartTimer]; 
} 
-(void) StartTimer 
{ 
    timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(timerTick:) userInfo:nil repeats:YES]; 
    [[NSRunLoop currentRunLoop] addTimer:timer forMode:NSDefaultRunLoopMode]; 


} 

//Event called every time the NSTimer ticks. 
- (void)timerTick:(NSTimer *)timer 
{ 
    timeSec++; 
    if (timeSec == 60) 
    { 
     timeSec = 0; 
     timeMin++; 
    } 
    //Format the string 00:00 
    NSString* timeNow = [NSString stringWithFormat:@"%02d:%02d", timeMin, timeSec]; 
    //Display on your label 
    //[timeLabel setStringValue:timeNow]; 
    self.lbl_timer.text= timeNow; 
} 

//Call this to stop the timer event(could use as a 'Pause' or 'Reset') 
- (void) StopTimer 
{ 
    // [timer invalidate]; 
    timeSec = 0; 
    timeMin = 0; 
    //Since we reset here, and timerTick won't update your label again, we need to refresh it again. 
    //Format the string in 00:00 
    NSString* timeNow = [NSString stringWithFormat:@"%02d:%02d", timeMin, timeSec]; 
    //Display on your label 
    // [timeLabel setStringValue:timeNow]; 
    self.lbl_timer.text= timeNow; 
}

感謝提前..

來源

2016-12-30 iosdv

將定時器啓動時間保存在永久存儲器的某處（例如'NSUserDefaults'，核心數據，SQLite等）。然後，我們然後重新啓動應用程序，恢復開始時間，並將其用作顯示已過時間量的基礎。這是Swift，但這說明了一些關鍵問題：http://stackoverflow.com/questions/34496389/swift-nstimer-in-background/34497360#34497360 – Rob

然後當你想重新設置你的時間？ – vaibhav

你想要設置定時器的值？以應用程序停止時的價值，還是考慮到應用程序會話之間的持續時間計算的值？ – Cristik

嘗試在nsuserdefault這個code.store數據

- (void)viewDidLoad { 

    timeSec=[[NSString stringWithFormat:@"%ld",(long)[[NSUserDefaults  standardUserDefaults]integerForKey:@"timeSec"]] intValue]; 
    timeMin=[[NSString stringWithFormat:@"%ld",(long)[[NSUserDefaults standardUserDefaults]integerForKey:@"timeMin"]] intValue]; 
    [self StartTimer]; 
} 
-(void) StartTimer 
{ 
    timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(timerTick:) userInfo:nil repeats:YES]; 
    [[NSRunLoop currentRunLoop] addTimer:timer forMode:NSDefaultRunLoopMode]; 
    [email protected]"00:00"; 

} 
- (void)timerTick:(NSTimer *)timer 
{ 
    timeSec++; 
    if (timeSec == 60) 
    { 
     [locationManager startUpdatingLocation]; 
     timeSec = 0; 
     timeMin++; 
    } 
    self.lbl_timer.text= [NSString stringWithFormat:@"%02d:%02d", timeMin, timeSec];; 
}

，當你回到屏幕時添加此code.like後退按鈕或關閉按鈕動作

[timer invalidate]; 
             [[NSUserDefaults standardUserDefaults]setInteger:timeSec forKey:@"timeSec"]; 
             [[NSUserDefaults standardUserDefaults]setInteger:timeMin forKey:@"timeMin"];

來源

2017-01-09 05:37:45 iOS

好吧，我會嘗試此代碼 – iosdv

感謝其代碼工作 – iosdv

聲明兩個變量的appdelegate文件

1）* NSUserDefaults的usedefaults; 2）@property（nonatomic，readwrite）int timeSec，timeMin，isBackground;

- (void)applicationDidEnterBackground:(UIApplication *)application 
{ 
    self.isBackground=1; 
    usedefaults=[NSUserDefaults standardUserDefaults]; 
    [usedefaults setObject:[NSString stringWithFormat:@"%d",self.timeMin] forKey:@"timemin"]; 
    [usedefaults setObject:[NSString stringWithFormat:@"%d",self.timeSec] forKey:@"timesec"]; 
    NSLog(@"Enter in back value userdefault %@",usedefaults); 
} 

- (void)applicationWillEnterForeground:(UIApplication *)application { 

    if(self.isBackground==1) 
    { 
     self.isBackground=0; 
     self.timeMin=[[usedefaults objectForKey:@"timemin"] intValue]; 
     self.timeSec=[[usedefaults objectForKey:@"timesec"] intValue]; 
     NSLog(@"Foreground value min %d sec %d",self.timeMin,self.timeSec); 
    } 
} 

In ViewDidload in your Timer startpage 
app=(AppDelegate *)[[UIApplication sharedApplication] delegate];

最後只是將您的self.timemin替換爲app.timemin與timesec相同。

乾杯享受這無疑爲ü工作..

來源

2016-12-30 12:49:48

如何在我啓動應用程序時恢復時間計數器值

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