问题
I have several date strings that I need to convert to NSDates. My parsing code is the following:
NSString *s = [pair objectForKey:@\"nodeContent\"];
NSDateFormatter *f = [[NSDateFormatter alloc] init];
[f setDateFormat:@\"yyyy-MM-dd\'T\'HH:mm:ssZZ\"];
self.date = [f dateFromString:s];
The above code works fine in all the devices and simulators we\'ve tested.
The strange thing is that when the above code runs on any iPhone 5 running iOS 6.1 or 7.0.x , the line self.date = [f dateFromString:s]; returns nil every time.
I have checked and the string s exists and contains the same characters when compared side-by-side with a device that does parse the date correctly.
This is an example date string: `2013-10-31T21:50:00-06:00\'
Am I missing something here?
回答1:
It's because you are not setting the date formatter's locale to the special en_US_POSIX locale. Most likely your iPhone 5 has a different setting for the 24-hour setting.
You need to set the special locale whenever you parse a fixed format string.
来源：https://stackoverflow.com/questions/19578433/hardware-dependent-nsdateformatter-datefromstring-bug-returns-nil