依赖于硬件的NSDateFormatter dateFromString:bug(返回nil) [英] Hardware-dependent NSDateFormatter dateFromString: bug (returns nil)
问题描述
我有几个日期字符串需要转换为NSDates。
我的解析代码如下:
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];
上述代码在我们测试的所有设备和模拟器中都能正常工作。
奇怪的是,当上述代码在运行iOS 6.1或7.0.x的任何iPhone 5上运行时,行 self.date = [f dateFromString:s];
每次都返回nil。
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.
我检查过并且字符串 s
存在并且在比较时包含相同的字符与正确解析日期的设备并排。
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.
这是一个示例日期字符串:
`2013-10-31T21:50: 00-06:00'
This is an example date string: `2013-10-31T21:50:00-06:00'
我在这里遗漏了什么吗?
Am I missing something here?
推荐答案
这是因为您没有将日期格式化程序的语言环境设置为特殊的 en_US_POSIX
语言环境。很可能你的iPhone 5在24小时设置中有不同的设置。
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.
每当你解析一个固定格式的字符串时,你需要设置特殊的语言环境。
You need to set the special locale whenever you parse a fixed format string.
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