[英]Get three letter month and day from string date?
我有这样的字符串日期,
NSString * dateStr = @"2014-12-31";
我想在三个字母的月份中获得一个月,例如Des (from dateStr)和一天例如31
我尝试了大约2个小时,但我无法正确接收它。
我的代码是..
首先将字符串转换为日期;
NSString *dateStr = [[self.listOfEvents objectAtIndex:indexPath.row] objectForKey:@"EventDate"];
NSDateFormatter *DTFormatter = [[NSDateFormatter alloc] init];
[DTFormatter setDateFormat:@"yyyy-MM-dd"];
NSDate *eventDate = [DTFormatter dateFromString:dateStr];
NSLog(@"eventDate - %@", eventDate);
现在将日期转换为字符串;
NSDateFormatter *currentDTFormatter = [[NSDateFormatter alloc] init];
[currentDTFormatter setDateFormat:@"dd MMM"];
NSString *eventDateStr = [DTFormatter stringFromDate:eventDate];
NSLog(@"eventDateStr - %@", eventDateStr);
所以,请给我建议我哪里错了。
编辑:
我得到的控制台输出是
eventDate-2014-12-31 18:30:00 +0000
eventDateStr-2014-12-31
问题是您正在使用旧的dateformatter DTFormatter
进行转换,因此必须使用currentDTFormatter代替它。
尝试使用currentDTFormatter
此格式化程序。
NSDateFormatter *currentDTFormatter = [[NSDateFormatter alloc] init];
[currentDTFormatter setDateFormat:@"dd MMM"];
NSString *eventDateStr = [currentDTFormatter stringFromDate:eventDate];
NSLog(@"%@", eventDateStr);
尝试添加此行[currentDTFormatter setDateStyle:NSDateFormatterMediumStyle];
在调用setDateFormat
之前
这是来自Apple文档的适当段落:
NSDateFormatterMediumStyle
Specifies a medium style, typically with abbreviated text, such as “Nov 23, 1937”.
Equal to kCFDateFormatterMediumStyle.
Available in OS X v10.4 and later.
Declared in NSDateFormatter.h.
这也是在这里说https://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/DataFormatting/Articles/dfDateFormatting10_4.html#//apple_ref/doc/uid/TP40002369-SW1仅使用一个“ d”因此,“ EdMMM”应该适用于英语语言环境,或者我猜“ dMMM”甚至是“ d MMM”
你有没有尝试过:
[formatter setDateFormat:@"dd-MMM-YYYY HH:mm"];
接着
[formatter stringFromDate:someNSDate];
这是解决方案
NSString * dateStr = @"2014-12-31";
NSDateFormatter* df = [[NSDateFormatter alloc] init];
[df setDateFormat:@"yyyy-MM-dd"];
NSDate* date = [df dateFromString:dateStr];
NSLog(@"%@", date);
[df setDateFormat:@"dd MMM"];
NSString *dateString = [df stringFromDate:date];
NSLog(@"%@", dateString);
试用
请尝试使用以下代码转换您的日期字符串...
- (NSString*) formatDateString:(NSString*)date
{
NSDateFormatter *inputFormatter = [[NSDateFormatter alloc] init];
[inputFormatter setDateFormat:@"yyyy-MM-dd"];
NSDate *formattedDate = [inputFormatter dateFromString: date];
NSDateFormatter *outputFormatter = [[NSDateFormatter alloc] init];
[outputFormatter setDateFormat:@"dd MMM"];
NSString *displayDate = [NSString stringWithFormat:@"%@", [outputFormatter stringFromDate:formattedDate]];
return displayDate;
}
您还可以将格式样式设置为NSDateFormatter
来格式化日期字符串
setTimeStyle:
setDateStyle:
您可以从下面的链接检查NSDateFormatter
以供参考。
https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSDateFormatter_Class/Reference/Reference.html
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