轉換時間戳 - IPhone

Question

即時通訊試圖找出如何轉換時間戳日期和時間（格式 - 2012-06-14T13：15：21Z）以顯示在屏幕上像'1小時前'/'2天前'/ '2秒前'等任何人都可以幫助我呢？

Answer 1

試試這個：

NSCalendar *cal = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar]; 
[cal setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0]]; 
NSDate *date1 = yourDate; 
NSDate *date2 = [NSDate date];//Current Date 
unsigned int unitFlags = NSDayCalendarUnit|NSYearCalendarUnit|NSMonthCalendarUnit|NSHourCalendarUnit|NSMinuteCalendarUnit|NSSecondCalendarUnit;     
NSDateComponents *diffComps = [cal components:unitFlags fromDate:date2 toDate:date1 options:0]; 
[diffComps month] //gives you month 
[diffComps day] //gives you day 
[diffComps year] // gives you year 
[cal release];