ios - 耗时和设置日期？

Question

这是我想要完成的:用户触摸一个按钮，然后可以将某些内容分享到 facebook。用户触摸按钮的日期已设置，并且在 24 秒内用户无法再次与 Facebook 分享任何内容。 24 秒后，用户可以将另一篇帖子分享到 Facebook。

错误与facebook无关，但与elapsedTime有关。重置 elapsedTime 后，它不会重新计数到 24。它只是停留在一个非常小的数字，如“0.0043”

这是我的代码:

-(void)postToFacebook
{
    if (elapsedTime >= 24) {
        [[CCDirector sharedDirector] pause];
        [[CCDirector sharedDirector] stopAnimation];

        CCAppDelegate *app = (CCAppDelegate*) [[UIApplication sharedApplication] delegate];


        SLComposeViewController *faceBookPost = [SLComposeViewController     composeViewControllerForServiceType:SLServiceTypeFacebook];

        [faceBookPost setInitialText:@"test"];
        [faceBookPost addURL:[NSURL URLWithString:@"http://www.google.com"]];

        [[app navController] presentModalViewController:faceBookPost animated:YES];
        faceBookPost.completionHandler = ^(SLComposeViewControllerResult result)
        {
            [[CCDirector sharedDirector] resume];
            [[CCDirector sharedDirector] startAnimation];
            [[app navController] dismissModalViewControllerAnimated:YES];
            dogeAmount.string = [NSString stringWithFormat:@"%.2LF", _doge];
            [self setDate];
            NSLog(@"Posted to Facebook");
        };
    } else if (elapsedTime < 24) {
        NSLog(@"%f", elapsedTime);
    }
}

这里是上面调用的 SetDate:

-(void)setDate {
    NSString *dateString = [NSDateFormatter localizedStringFromDate:[NSDate date]
                                                          dateStyle:NSDateFormatterShortStyle
                                                          timeStyle:NSDateFormatterFullStyle];
    defaults = [NSUserDefaults standardUserDefaults];
    startTime = [NSDate date];
    calendar = [NSCalendar currentCalendar];
    components = [calendar components:(NSHourCalendarUnit | NSMinuteCalendarUnit) fromDate:startTime];
    hour = [components hour];
    minute = [components minute];
    NSNumber *hourNumber = [NSNumber numberWithInteger:hour];
    NSNumber *minuteNumber = [NSNumber numberWithInteger:minute];
    [defaults setObject:startTime forKey:@"startTime"];
    [defaults setObject:hourNumber forKey:@"hour"];
    [defaults setObject:minuteNumber forKey:@"minute"];
    [defaults setInteger:elapsedTime forKey:@"elapsedTime"];
    NSLog(@"%@",dateString);
    elapsedTime = fabs([startTime timeIntervalSinceNow]);
    [defaults synchronize];
}

我不知道我做错了什么。

Answer 1

.h

@property (strong, nonatomic) NSDate *dateString;

.m

- (void)share
{
    double dateSinceNow = -[self.dateString timeIntervalSinceNow];

    if (dateSinceNow > 24)
    {
        //share to facebook
    }

    self.dateString = [NSDate date];
}