日期倒计时完成时更改 UILabel [关闭]答案

【问题标题】：Change UILabel when countdown to a date completes [closed]日期倒计时完成时更改 UILabel [关闭]
【发布时间】：2015-04-02 01:42:57
【问题描述】：

我的应用中有倒计时，当倒计时到达日期时，我需要将文本更改为 FINISH。

代码如下：

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"YYYY-MM-dd"];
NSDate *startingDate = [NSDate date];
NSDate *endingDate = [dateFormatter dateFromString:[NSString stringWithFormat:@"%@", currentGame.gameDate]];
NSUInteger unitFlags = NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay|NSCalendarUnitMinute|NSCalendarUnitSecond;

NSCalendar *gregorianCalendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
NSDateComponents *componentsDaysDiff = [gregorianCalendar components:unitFlags
                                                            fromDate:startingDate
                                                              toDate:endingDate
                                                             options:0];


NSString *countdownText = [NSString stringWithFormat:@"%ld Months %ld Days %ld Minutes %ld Seconds", (long)componentsDaysDiff.month, (long)componentsDaysDiff.day, (long)componentsDaysDiff.minute, (long)componentsDaysDiff.second];

gamesCountdownLabel.text = countdownText;

【问题讨论】：

只检查是否所有组件都为零...我不明白你的问题。
@JoshCaswell 如果您看到我附上的图片，您会发现倒计时 - 4 天。当点击数据库中标签更改为发布的日期时，我需要倒计时

标签： ios objective-c cocoa-touch time uilabel

【解决方案1】：

我找到了答案

这里是：

)componentsDaysDiff.second];
if ((long)componentsDaysDiff.month <= 0 && (long)componentsDaysDiff.day <= 0 && (long)componentsDaysDiff.minute <= 0 && (long)componentsDaysDiff.second <= 0 ) {
    gamesCountdownLabel.text = @"Released";
}else{
gamesCountdownLabel.text = countdownText;
}

【讨论】：

【解决方案2】：

根据您的解释，我了解到您只需要检查“当前日期”是否晚于“结束日期”即可。

你可以替换：

gamesCountdownLabel.text = countdownText;

与：

NSDate *refDate = [NSDate date]; // current date as a reference time

gamesCountdownLabel.text = ([refDate isEqualToDate: [endingDate laterDate: refDate]) ? “FINSIH” : countdownText;

【讨论】：