NSString到NSDate [英] NSString to NSDate
问题描述
我有一个包含当前日期的字符串:
I got a string that contains the current date by using this :
NSString *date = [[NSDate date] description];
另一点,我想从这个字符串中检索日期,我使用下面的代码: / p>
At a different point I want to retrieve the date from this string and I used the following code:
[NSDateFormatter setDefaultFormatterBehavior:NSDateFormatterBehavior10_4];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
//[NSDateFormatter setDefaultFormatterBehavior:NSDateFormatterBehaviorDefault];
[dateFormatter setDateFormat:@"YYYY-MM-DD HH:MM:SS ±HHMM"];
NSDate *dateFromString = [[NSDate alloc] init];
dateFromString = [dateFormatter dateFromString:<NSString containing date>];
我得到 dateFromString
为 nil
0x0。
推荐答案
你不能发明格式化字符串语法并期望它工作;您需要实际使用已记录的格式。 (确切地说,MM意味着月,分钟和GMT偏移分钟全部同时?)
You can't invent format string syntax and expect it to work; you need to actually use a documented format. (Seriously, "MM" meaning "month", "minute" and "GMT offset minutes" all at the same time?)
由于文档点则10.4格式化程序使用 Unicode格式字符串。
As the documentation points out, the 10.4 formatters use Unicode format strings.
请尝试yyyy-MM-dd HH:mm:ss ZZZ。
Try "yyyy-MM-dd HH:mm:ss ZZZ" instead.
此外,Objective-C源代码是ASCII 。不要把字符放在那里,并期望它在任何上下文中工作;而是使用字符串文件。
Also, Objective-C source is ASCII. Don't put characters like ± in there and expect it to work in any context; instead, use strings files.
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