两个NSDates之间的差异

3 回答

• 24

  NSDate参考是一个很棒的小文档：http://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Classes/NSDate_Class/Reference/Reference.html

  - (NSTimeInterval)timeIntervalSinceDate:(NSDate *)anotherDate
  

  如果你想要时间间隔差异，你正在寻找什么 .

  几天（因为不是每天都有相同的分钟数，小时数）你想看到Martins在下面回答并使用NSDateComponents和[NSCalendar currentCalendar]

  回复于 2024-04-20T22:05:15+08:00
• 1

  这里有一个小宝石 - 不仅仅是几天：

  // Assuming you have fistDate and secondDate
  
  unsigned int unitFlags = NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitDay | NSCalendarUnitMonth;
  
  NSDateComponents *conversionInfo = [currCalendar components:unitFlags fromDate:fistDate   toDate:secondDate  options:0];
  
  int months = [conversionInfo month];
  int days = [conversionInfo day];
  int hours = [conversionInfo hour];
  int minutes = [conversionInfo minute];
  

  这非常有用 - 尤其是在格式化字符串时，例如：

  [NSString stringWithFormat:@"%d months , %d days, %d hours, %d min", months, days, hours, minutes];
  

  快乐编码:)

  回复于 2024-04-20T22:05:15+08:00
• 56

  这是一个Swift实现（我在调试诸如网络请求和JSON解析之类的东西时一直使用它）：

  let date1 = NSDate()
  
  // do some long running task
  
  let date2 = NSDate()
  print(date2.timeIntervalSinceDate(date1))
  
  // you can also do this in one line, of course:
  print(NSDate().timeIntervalSinceDate(date1))
  

  回复于 2024-04-20T22:05:15+08:00