两个日期之间的差异怎么可能是错误的 (2013-04-04T19:14:58+02:00-2013-04-03T18:14:58+02:00) ?
代码的结果是
01 天 06 小时 46 分 02 秒
结果完全错误正确的答案应该是
01 天 01 小时 00 分钟 00 秒
你能帮我找出问题的根源吗?
编码 :
-(void)startTimer {
timer = [NSTimer scheduledTimerWithTimeInterval: 1.0 target:self selector:@selector(updateCountdown) userInfo:nil repeats: YES];
}
-(void) updateCountdown
{
NSDate *expirydate = [MSharedFunctions SqldateStringTodate:@"2013-04-04T19:14:58+02:00"];
NSDate *now = [MSharedFunctions SqldateStringTodate:@"2013-04-03T18:14:58+02:00"];
if ([expirydate isEarlierThanDate:[MSharedFunctions SqldateStringTodate:[MSharedFunctions SqldateStringTodateNow]]]) {
//Fire end counter
//[[NSNotificationCenter defaultCenter] postNotificationName:@"TIMER" object:nil];
}
//NSDate *dateFromString = [[NSDate alloc] init];
NSDate *dateFromString =expirydate;
//NSLog(@"now %@: endtime :%@ ",[MSharedFunctions SqldateStringTodateNow],@"2013-04-03T18:14:58+02:00");
NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *componentsHours = [calendar components:NSHourCalendarUnit fromDate:now];
NSDateComponents *componentMint = [calendar components:NSMinuteCalendarUnit fromDate:now];
NSDateComponents *componentSec = [calendar components:NSSecondCalendarUnit fromDate:now];
NSDateComponents *componentsDaysDiff = [calendar components:NSDayCalendarUnit
fromDate:now
toDate:dateFromString
options:0];
NSLog(@"%@",[NSString stringWithFormat:@"%02d",componentsDaysDiff.day]);
NSLog(@"%@",[NSString stringWithFormat:@"%02d",(24-componentsHours.hour)]);
NSLog(@"%@",[NSString stringWithFormat:@"%02d",(60-componentMint.minute)]);
NSLog(@"%@",[NSString stringWithFormat:@"%02d",(60-componentSec.second)]);
}
SqldateStringTodate 函数:
+(NSDate*)SqldateStringTodate:(NSString*) stringdate {
stringdate = [stringdate stringByReplacingOccurrencesOfString:@":" withString:@"" options:0 range:NSMakeRange([stringdate length] - 5,5)];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init] ;
NSLocale* formatterLocale = [[NSLocale alloc] initWithLocaleIdentifier:@"en_GB"] ;
[dateFormatter setLocale:formatterLocale];
if (stringdate.length==24) {
[dateFormatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ssZ"];
}
else {
[dateFormatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ss.SSSZ"];
}
//DebugLog(@"New Date %@",stringdate);
NSDate *getDate = [dateFormatter dateFromString:stringdate];
return getDate;
}