在 DetailViewController 上，倒计时

Question

我有一个倒数计时器，它在单元格中工作。我正在推动单元格并显示 DetailView Controller。在 DetailViewController 上，倒计时不起作用。例如，在单元格中，我显示的倒计时看起来像 | 23 天 14 小时 45 分 33 秒 |和工作。我正在推送单元格，并在 DetailViewController 上显示标签，如 | 23 天 14 小时 45 分 32 秒 |但不工作。

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.

    self.label.text = self.tweetMessage;
    self.username.text = self.userId;
    self.count.text = self.countdownStartTime;

    NSTimer *timer;
    timer = [NSTimer scheduledTimerWithTimeInterval:1.0
                                             target:self
                                           selector:@selector(updateTime)
                                           userInfo:nil
                                            repeats:YES];
}

-(void)updateTime
{
    NSCalendar *calendar = [NSCalendar autoupdatingCurrentCalendar];
    NSUInteger preservedComponents = (NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay);
    self.datePicker.date = [calendar dateFromComponents:[calendar components:preservedComponents fromDate:self.datePicker.date]];

    //Get the time left until the specified date
    NSInteger ti = ((NSInteger)[self.datePicker.date timeIntervalSinceNow]);
    NSInteger seconds = ti % 60;
    NSInteger minutes = (ti / 60) % 60;
    NSInteger hours = (ti / 3600) % 24;
    NSInteger days = (ti / 86400);

    //Update the lable with the remaining time
    self.count.text = [NSString stringWithFormat:@"%02li days %02li hours %02li min %02li sec", (long)days, (long)hours, (long)minutes, (long)seconds];
}

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
    if ([segue.identifier isEqualToString:@"Continue"]){
        DetailViewController *controller = (DetailViewController *)segue.destinationViewController;
        controller.tweetMessage = ((TWTTweetTableViewCell *)sender).tweetMessage.text;
        controller.userId = ((TWTTweetTableViewCell *)sender).user.text;
        controller.countdownStartTime = ((TWTTweetTableViewCell *)sender).countdownTime.text;   
    }
}

Answer 1



import "DetailViewController.h"

@interface DetailViewController ()

@end

@implementation DetailViewController


(void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.

self.label.text = self.tweetMessage;
self.username.text = self.userId;
self.count.text = self.countdownStartTime;

NSTimer *timer;
timer = [NSTimer scheduledTimerWithTimeInterval:1.0
                                         target:self
                                       selector:@selector(updateTime)
                                       userInfo:nil
                                        repeats:YES];
}


-(void)updateTime
{

//Get the time left until the specified date
NSInteger ti = ((NSInteger)[self.datePicker.date timeIntervalSinceNow]);
NSInteger seconds = ti % 60;
NSInteger minutes = (ti / 60) % 60;
NSInteger hours = (ti / 3600) % 24;
NSInteger days = (ti / 86400);

//Update the lable with the remaining time
self.countdownTime.text = [NSString stringWithFormat:@"%02li days %02li hours %02li min %02li sec", (long)days, (long)hours, (long)minutes, (long)seconds];


}

enter code here



Not working my Friend..

在 DetailViewController 上，倒计时

On DetailViewController,countdown

objective-c

nstimer

ios

import "DetailViewController.h"