从一个字符串创建一个NSDate [英] create a NSDate from a string

问题描述

我有一个 NSString 像这样： @2012/3/15 9:15和I想将它转换为 NSDate ，我已经这样做了：

  NSString * str = @3/15/2012 9:15 PM; 
 NSDateFormatter * formatter = [[NSDateFormatter alloc] init]; 
 [formatter setDateFormat：@mm / dd / yyyy HH：mm]; 
 NSDate * date = [formatter dateFromString：]; 
 
 NSLog（@％@，date）; // date = null 
  

请帮助我，谢谢。使用以下解决方案

  NSString * str = @解决方案

2012/3/15 9:15;
NSDateFormatter * formatter = [[NSDateFormatter alloc] init];

formatter.dateFormat = @MM / dd / yyyy HH：mm a;

NSDate * date = [formatter dateFromString：str];

NSLog（@％@，date）;


编辑：
对不起，格式应该如下：

  formatter.dateFormat = @MM / dd / yyyy hh：mm a; 
  

显示的时间将是GMT时间。所以，如果你添加/减去时区，那将是下午9:15。

编辑：＃2

使用如下。你也会得到确切的时间。

  NSString * str = @2012年3月15日下午9:15; 
 
 NSDateFormatter * formatter = [[NSDateFormatter alloc] init]; 
 
 formatter.dateFormat = @MM / dd / yyyy hh：mm a; 
 
 NSTimeZone * gmt = [NSTimeZone timeZoneWithAbbreviation：@GMT]; 
 
 formatter.timeZone = gmt; 
 
 NSDate * date = [formatter dateFromString：str]; 
 
 NSLog（@％@，date）; 
  

I have an NSString like this: @"3/15/2012 9:15 PM" and I would like to convert it to NSDate, I have done like this:

NSString *str =@"3/15/2012 9:15 PM";
NSDateFormatter *formatter = [[NSDateFormatter alloc]init];
[formatter setDateFormat:@"mm/dd/yyyy HH:mm"];
NSDate *date = [formatter dateFromString:];

NSLog(@"%@", date);  // date = null

Can you help me please, thanks.

解决方案

Use the following solution

NSString *str = @"3/15/2012 9:15 PM";
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];

formatter.dateFormat = @"MM/dd/yyyy HH:mm a";

NSDate *date = [formatter dateFromString:str];

NSLog(@"%@", date);

Edit: Sorry, the format should be as follows:

formatter.dateFormat = @"MM/dd/yyyy hh:mm a";

And the time shown will be GMT time. So if you add/subtract the timezone, it would be 9:15 PM.

Edit: #2

Use as below. You would get exact time too.

NSString *str = @"3/15/2012 9:15 PM";

NSDateFormatter *formatter = [[NSDateFormatter alloc] init];

formatter.dateFormat = @"MM/dd/yyyy hh:mm a";

NSTimeZone *gmt = [NSTimeZone timeZoneWithAbbreviation:@"GMT"];

formatter.timeZone = gmt;

NSDate *date = [formatter dateFromString:str];

NSLog(@"%@",date);

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