再写一个统一转换时间字符串为 NSDate的方法,如下:
+(NSDate *)xh_dateWithDateString:(NSString *)dateString
{
NSDate *date = nil;
date = [self xh_dateWithFormat_yyyy_MM_dd_HH_mm_ss_string:dateString];
if(date) return date;
date = [self xh_dateWithFormat_yyyy_MM_dd_HH_mm_string:dateString];
if(date) return date;
date = [self xh_dateWithFormat_yyyy_MM_dd_HH_string:dateString];
if(date) return date;
date = [self xh_dateWithFormat_yyyy_MM_dd_string:dateString];
if(date) return date;
date = [self xh_dateWithFormat_yyyy_MM_string:dateString];
if(date) return date;
return nil;
}
四.将NSDate -> NSDateFormatter
为什么要再转换为NSDateFormatter,有些人可能已经明白了,我们点开NSDateFormatter可以看到NSDateFormatter有以下属性
@property (nullable, copy) NSCalendar *calendar NS_AVAILABLE(10_7, 4_0);
@property (nullable, copy) NSTimeZone *timeZone NS_AVAILABLE(10_7, 4_0);
@property NSInteger era;
@property NSInteger year;
@property NSInteger month;
@property NSInteger day;
@property NSInteger hour;
@property NSInteger minute;
@property NSInteger second;
@property NSInteger nanosecond NS_AVAILABLE(10_7, 5_0);
@property NSInteger weekday;
@property NSInteger weekdayOrdinal;
@property NSInteger quarter NS_AVAILABLE(10_6, 4_0);
@property NSInteger weekOfMonth NS_AVAILABLE(10_7, 5_0);
@property NSInteger weekOfYear NS_AVAILABLE(10_7, 5_0);
@property NSInteger yearForWeekOfYear NS_AVAILABLE(10_7, 5_0);
@property (getter=isLeapMonth) BOOL leapMonth NS_AVAILABLE(10_8, 6_0);
@property (nullable, readonly, copy) NSDate *date NS_AVAILABLE(10_7, 4_0);
@end
我们新建一个NSDateComponents 的Category,笔者取名NSDateComponents+XHCategory,并实现如下方法:
+(NSDateComponents *)xh_dateComponentsFromDate:(NSDate *)date
{
NSDateComponents *components = [[NSCalendar currentCalendar] components:NSCalendarUnitYear| NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitWeekOfYear | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond | NSCalendarUnitWeekday | NSCalendarUnitWeekdayOrdinal fromDate:date];
return components;
}
接着我们就可以进行转换操作了,我们新建一个NSString的Category,笔者取名NSString+XHDateFormat
在NSString+XHDateFormat.h文件中写上需要转换的类型如下:
/**
* x年x月x日
*/
@property(nonatomic,copy,readonly)NSString *xh_formatNianYueRi;
/**
* x年x月
*/
@property(nonatomic,copy,readonly)NSString *xh_formatNianYue;
/**
* x月x日
*/
@property(nonatomic,copy,readonly)NSString *xh_formatYueRi;
/**
* x年
*/
@property(nonatomic,copy,readonly)NSString *xh_formatNian;
/**
* x时x分x秒
*/
@property(nonatomic,copy,readonly)NSString *xh_formatShiFenMiao;
/**
* x时x分
*/
@property(nonatomic,copy,readonly)NSString *xh_formatShiFen;
/**
* x分x秒
*/
@property(nonatomic,copy,readonly)NSString *xh_formatFenMiao;
/**
* yyyy-MM-dd
*/
@property(nonatomic,copy,readonly)NSString *xh_format_yyyy_MM_dd;
/**
* yyyy-MM
*/
@property(nonatomic,copy,readonly)NSString *xh_format_yyyy_MM;
/**
* MM-dd
*/
@property(nonatomic,copy,readonly)NSString *xh_format_MM_dd;
/**
* yyyy
*/
@property(nonatomic,copy,readonly)NSString *xh_format_yyyy;
/**
* HH:mm:ss
*/
@property(nonatomic,copy,readonly)NSString *xh_format_HH_mm_ss;
/**
* HH:mm
*/
@property(nonatomic,copy,readonly)NSString *xh_format_HH_mm;
/**
* mm:ss
*/
@property(nonatomic,copy,readonly)NSString *xh_format_mm_ss;
#pragma mark - 转换为星期几
@property(nonatomic,copy,readonly)NSString *xh_formatWeekDay;
