NSDateFormatter setDateFormat的序号月-日后缀选项
NSDateFormatter setDateFormat的序号月-日后缀选项
提问于 2009-08-15 22:41:42
我应该使用NSDateFormatter的哪个setDateFormat选项来获取月份-日期的序号后缀？
例如，下面的代码片段当前生成：
8月15日星期六下午3:11
我必须改变什么才能获得：
8月15日星期六下午3:11 th
NSDate *date = [NSDate date];
NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc] init] autorelease];
[dateFormatter setFormatterBehavior:NSDateFormatterBehavior10_4];
[dateFormatter setDateFormat:@"h:mm a EEEE MMMM d"];
NSString *dateString = [dateFormatter stringFromDate:date];
NSLog(@"%@", dateString);在PHP中，我会在上面的例子中使用这个：
<?php echo date('h:m A l F jS') ?>
在NSDateFormatter字符串中是否存在与S选项等效的NSDateFormatter？
回答 17
Stack Overflow用户
回答已采纳
发布于 2009-08-16 21:41:27
NSDate *date = [NSDate date];
NSDateFormatter *prefixDateFormatter = [[[NSDateFormatter alloc] init] autorelease];
[prefixDateFormatter setFormatterBehavior:NSDateFormatterBehavior10_4];
[prefixDateFormatter setDateFormat:@"h:mm a EEEE MMMM d"];
NSString *prefixDateString = [prefixDateFormatter stringFromDate:date];
NSDateFormatter *monthDayFormatter = [[[NSDateFormatter alloc] init] autorelease];
[monthDayFormatter setFormatterBehavior:NSDateFormatterBehavior10_4];
[monthDayFormatter setDateFormat:@"d"];
int date_day = [[monthDayFormatter stringFromDate:date] intValue];
NSString *suffix_string = @"|st|nd|rd|th|th|th|th|th|th|th|th|th|th|th|th|th|th|th|th|th|st|nd|rd|th|th|th|th|th|th|th|st";
NSArray *suffixes = [suffix_string componentsSeparatedByString: @"|"];
NSString *suffix = [suffixes objectAtIndex:date_day];
NSString *dateString = [prefixDateString stringByAppendingString:suffix];
NSLog(@"%@", dateString);Stack Overflow用户
发布于 2014-04-24 23:45:07
这些答案都不像我使用的那样美观，所以我想我应该分享一下：
Swift 3：
func daySuffix(from date: Date) -> String {
let calendar = Calendar.current
let dayOfMonth = calendar.component(.day, from: date)
switch dayOfMonth {
case 1, 21, 31: return "st"
case 2, 22: return "nd"
case 3, 23: return "rd"
default: return "th"
}
}Objective-C：
- (NSString *)daySuffixForDate:(NSDate *)date {
NSCalendar *calendar = [NSCalendar currentCalendar];
NSInteger dayOfMonth = [calendar component:NSCalendarUnitDay fromDate:date];
switch (dayOfMonth) {
case 1:
case 21:
case 31: return @"st";
case 2:
case 22: return @"nd";
case 3:
case 23: return @"rd";
default: return @"th";
}
}显然，这只适用于英语。
Stack Overflow用户
发布于 2015-06-25 01:59:14
从iOS9开始，很容易做到这一点
NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
formatter.numberStyle = NSNumberFormatterOrdinalStyle;
NSArray<NSNumber *> *numbers = @[@1, @2, @3, @4, @5];
for (NSNumber *number in numbers) {
NSLog(@"%@", [formatter stringFromNumber:number]);
}
// "1st", "2nd", "3rd", "4th", "5th"Swift 2.2：
let numberFormatter = NSNumberFormatter()
numberFormatter.numberStyle = .OrdinalStyle
let numbers: [Int] = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
for number in numbers {
print(numberFormatter.stringFromNumber(number)!)
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/1283045
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