以时间戳格式获取当前NSDate [英] Get current NSDate in timestamp format

问题描述

我有一个基本的方法，获取当前时间并将其设置为字符串。然而，我怎么能得到它格式化当前日期&时间在UNIX自1970年以来的时间戳格式？

这是我的代码：

  NSDate * currentTime = [NSDate date]; 
 NSDateFormatter * dateFormatter = [[NSDateFormatter alloc] init]; 
 [dateFormatter setDateFormat：@hh-mm]; 
 NSString * resultString = [dateFormatter stringFromDate：currentTime]; 
  

是否可以使用 NSDateFormatter 'resultString'into a timestamp？

解决方案

这里是我使用的：

  NSString * timestamp = [NSString stringWithFormat：@％f，[[NSDate date] timeIntervalSince1970] * 1000]; 
  

（以毫秒为单位乘以1000，否则取出）

如果你一直使用它，那么可以声明一个宏。

  #define TimeStamp [NSString stringWithFormat：@％f，[[NSDate date] timeIntervalSince1970] * 1000] 
  

然后调用它像这样：

  NSString * timestamp = TimeStamp; 
  

或作为方法：

   - （NSString *）timeStamp {
 return [NSString stringWithFormat：@％f，[[NSDate date] timeIntervalSince1970] * 1000]; 
} 
  

As TimeInterval

   - （NSTimeInterval）timeStamp {
 return [[NSDate date] timeIntervalSince1970] * 1000; 
} 
  

注意：

1000是将时间戳转换为毫秒。

如果你想在Swift中使用全局变量，可以使用：

  var Timestamp：String {
 return \（NSDate（）。timeIntervalSince1970 * 1000）
} 
  

可以调用它

  println（Timestamp：\（Timestamp））
  

同样， * 1000 是毫秒，如果您愿意， 。如果你想保持它为 NSTimeInterval

  var Timestamp：NSTimeInterval {
 return NSDate（）。timeIntervalSince1970 * 1000 
} 
  

的任何类的上下文，他们将随时随地可以访问。

I have a basic method which gets the current time and sets it in a string. However, how can I get it to format the current date & time in a UNIX since-1970 timestamp format?

Here is my code:

NSDate *currentTime = [NSDate date];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"hh-mm"];
NSString *resultString = [dateFormatter stringFromDate: currentTime];

Is it possible to use NSDateFormatter to change the 'resultString' into a timestamp?

解决方案

Here's what I use:

NSString * timestamp = [NSString stringWithFormat:@"%f",[[NSDate date] timeIntervalSince1970] * 1000];

(times 1000 for milliseconds, otherwise, take that out)

If You're using it all the time, it might be nice to declare a macro

#define TimeStamp [NSString stringWithFormat:@"%f",[[NSDate date] timeIntervalSince1970] * 1000]

Then Call it like this:

NSString * timestamp = TimeStamp;

Or as a method:

- (NSString *) timeStamp {
    return [NSString stringWithFormat:@"%f",[[NSDate date] timeIntervalSince1970] * 1000];
}

As TimeInterval

- (NSTimeInterval) timeStamp {
    return [[NSDate date] timeIntervalSince1970] * 1000;
}

NOTE:

The 1000 is to convert the timestamp to milliseconds. You can remove this if you prefer your timeInterval in seconds.

Swift

If you'd like a global variable in Swift, you could use this:

var Timestamp: String {
    return "\(NSDate().timeIntervalSince1970 * 1000)"
}

Then, you can call it

println("Timestamp: \(Timestamp)")

Again, the *1000 is for miliseconds, if you'd prefer, you can remove that. If you want to keep it as an NSTimeInterval

var Timestamp: NSTimeInterval {
    return NSDate().timeIntervalSince1970 * 1000
}

Declare these outside of the context of any class and they'll be accessible anywhere.

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