iOS 开发问题：日期格式
我有这样的代码：
NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc] init] autorelease];
[dateFormatter setTimeStyle:kCFDateFormatterNoStyle];
[dateFormatter setTimeZone:[NSTimeZone localTimeZone]];
NSString *dateAdded = [dateFormatter stringFromDate:[NSDate date]];
[t appendFormat:@" (added at %@)", dateAdded];
t是一个NSMutableArray。
我不知道它出了什么问题，但结果是 dateAdded 结果是一个空字符串。如果我将最后一行替换为
[t appendFormat:@" (added at %@)", [NSDate date]];
一切都会很好，除了日期以原始形式输出。
但我的格式有什么问题吗？
I have this code:
NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc] init] autorelease];
[dateFormatter setTimeStyle:kCFDateFormatterNoStyle];
[dateFormatter setTimeZone:[NSTimeZone localTimeZone]];
NSString *dateAdded = [dateFormatter stringFromDate:[NSDate date]];
[t appendFormat:@" (added at %@)", dateAdded];
t is a NSMutableArray.
I don't know what's wrong with it but the result is dateAdded turned out to be a empty string. If I replace the last line with
[t appendFormat:@" (added at %@)", [NSDate date]];
everything goes just fine, except date is output in raw form.
But what's wrong with my formatting?
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尝试将日期样式设置为 kCFDateFormatterNoStyle 以外的其他样式。
Try setting the date style to something other than kCFDateFormatterNoStyle.