一.前言
最近項(xiàng)目開發(fā)過程中用到了大量的關(guān)于時(shí)間的處理,將后臺(tái)返回的時(shí)間字符串轉(zhuǎn)換為指定的格式時(shí)間再顯示在UI上.
例如: 將后臺(tái)返回的時(shí)間字符串2017-04-16 13:08:06轉(zhuǎn)換為:2017年04月16日、2017年04月、04月16日、2017-04-16、2017-04、04-16、13:08、星期幾等等.
項(xiàng)目是多人開發(fā),由于前期沒有統(tǒng)一處理時(shí)間轉(zhuǎn)換的問題,后期發(fā)現(xiàn)項(xiàng)目中好多關(guān)于時(shí)間轉(zhuǎn)換的代碼,大部分都是通過(- : 等字符)截取成字符串?dāng)?shù)組再取相應(yīng)時(shí)間拼接成指定格式,輸出在UI顯示的地方,代碼非常的臃腫,并且這種方式非常不可取.
原因:后臺(tái)返回的時(shí)間字符串 并不都是 2017-04-16 13:08:06這種格式,還有2017-04-16這種格式,截取前需要長(zhǎng)度格式等校驗(yàn),多了很多校驗(yàn)代碼.非常不可取.
既然是時(shí)間,我們便要通過時(shí)間的思維來(lái)完成轉(zhuǎn)換問題,不要通過截取字符串的方式
于是我便寫了一個(gè)類,來(lái)統(tǒng)一處理轉(zhuǎn)換問題.
二.效果
具體怎么操作:
三.將時(shí)間字符串->NSDate
首先我們要將2017-04-16 13:08:06或2017-04-16這種格式時(shí)間字符串轉(zhuǎn)換為NSDate
我們新建一個(gè)NSDate的Category,筆者取名為NSDate+XHCategory,寫一個(gè)時(shí)間字符串->NSDate方法,代碼如下:
+(NSDate*)xh_dateWithFormat_yyyy_MM_dd_HH_mm_ss_string:(NSString *)string{ NSDateFormatter* dateFormat = [[NSDateFormatter alloc] init]; [dateFormat setDateFormat:@"yyyy-MM-dd HH:mm:ss"]; NSDate *date =[dateFormat dateFromString:string]; return date;}為了兼用其他格式時(shí)間字符串,我們把可能的情況都寫上,如下
+(NSDate *)xh_dateWithFormat_yyyy_MM_dd_HH_mm_string:(NSString *)string{ NSDateFormatter* dateFormat = [[NSDateFormatter alloc] init]; [dateFormat setDateFormat:@"yyyy-MM-dd HH:mm"]; NSDate *date =[dateFormat dateFromString:string]; return date;}+(NSDate *)xh_dateWithFormat_yyyy_MM_dd_HH_string:(NSString *)string{ NSDateFormatter* dateFormat = [[NSDateFormatter alloc] init]; [dateFormat setDateFormat:@"yyyy-MM-dd HH"]; NSDate *date =[dateFormat dateFromString:string]; return date;}+(NSDate *)xh_dateWithFormat_yyyy_MM_dd_string:(NSString *)string{ NSDateFormatter* dateFormat = [[NSDateFormatter alloc] init]; [dateFormat setDateFormat:@"yyyy-MM-dd"]; NSDate *date =[dateFormat dateFromString:string]; return date;}+(NSDate *)xh_dateWithFormat_yyyy_MM_string:(NSString *)string{ NSDateFormatter* dateFormat = [[NSDateFormatter alloc] init]; [dateFormat setDateFormat:@"yyyy-MM"]; NSDate *date =[dateFormat dateFromString:string]; return date;}再寫一個(gè)統(tǒng)一轉(zhuǎn)換時(shí)間字符串為 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.將NSDate -> NSDateFormatter
為什么要再轉(zhuǎn)換為NSDateFormatter,有些人可能已經(jīng)明白了,我們點(diǎn)開NSDateFormatter可以看到NSDateFormatter有以下屬性
@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
我們新建一個(gè)NSDateComponents 的Category,筆者取名NSDateComponents+XHCategory,并實(shí)現(xiàn)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;}接著我們就可以進(jìn)行轉(zhuǎn)換操作了,我們新建一個(gè)NSString的Category,筆者取名NSString+XHDateFormat
在NSString+XHDateFormat.h文件中寫上需要轉(zhuǎn)換的類型如下:
/** * 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時(shí)x分x秒 */@property(nonatomic,copy,readonly)NSString *xh_formatShiFenMiao;/** * x時(shí)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 - 轉(zhuǎn)換為星期幾@property(nonatomic,copy,readonly)NSString *xh_formatWeekDay;
在 NSString+XHDateFormat.m 實(shí)現(xiàn)如下:
-(NSString *)xh_formatNianYueRi{ NSDate *date = [NSDate xh_dateWithDateString:self]; return [NSString stringWithFormat:@"%ld年%02ld月%02ld日",date.year,date.month,date.day];}-(NSString *)xh_formatNianYue{ NSDate *date = [NSDate xh_dateWithDateString:self]; return [NSString stringWithFormat:@"%ld年%02ld月",date.year,date.month];}-(NSString *)xh_formatYueRi{ NSDate *date = [NSDate xh_dateWithDateString:self]; return [NSString stringWithFormat:@"%02ld月%02ld月",date.month,date.day];}-(NSString *)xh_formatNian{ NSDate *date = [NSDate xh_dateWithDateString:self]; return [NSString stringWithFormat:@"%ld年",date.year];}-(NSString *)xh_formatShiFenMiao{ NSDate *date = [NSDate xh_dateWithDateString:self]; return [NSString stringWithFormat:@"%ld時(shí)%02ld分%02ld秒",date.hour,date.minute,date.seconds];}-(NSString *)xh_formatShiFen{ NSDate *date = [NSDate xh_dateWithDateString:self]; return [NSString stringWithFormat:@"%ld時(shí)%02ld分",date.hour,date.minute];}-(NSString *)xh_formatFenMiao{ NSDate *date = [NSDate xh_dateWithDateString:self]; return [NSString stringWithFormat:@"%02ld分%02ld秒",date.minute,date.seconds];}-(NSString *)xh_format_yyyy_MM_dd{ NSDate *date = [NSDate xh_dateWithDateString:self]; return [NSString stringWithFormat:@"%ld-%02ld-%02ld",date.year,date.month,date.day];}-(NSString *)xh_format_yyyy_MM{ NSDate *date = [NSDate xh_dateWithDateString:self]; return [NSString stringWithFormat:@"%ld-%02ld",date.year,date.month];}-(NSString *)xh_format_MM_dd{ NSDate *date = [NSDate xh_dateWithDateString:self]; return [NSString stringWithFormat:@"%02ld-%02ld",date.month,date.day];}-(NSString *)xh_format_yyyy{ NSDate *date = [NSDate xh_dateWithDateString:self]; return [NSString stringWithFormat:@"%ld",date.year];}-(NSString *)xh_format_HH_mm_ss{ NSDate *date = [NSDate xh_dateWithDateString:self]; return [NSString stringWithFormat:@"%02ld:%02ld:%02ld",date.hour,date.minute,date.seconds];}-(NSString *)xh_format_HH_mm{ NSDate *date = [NSDate xh_dateWithDateString:self]; return [NSString stringWithFormat:@"%02ld:%02ld",date.hour,date.minute];}-(NSString *)xh_format_mm_ss{ NSDate *date = [NSDate xh_dateWithDateString:self]; return [NSString stringWithFormat:@"%02ld:%02ld",date.minute,date.seconds];}-(NSString *)xh_formatWeekDay{ NSString *weekStr=nil; NSDate *date = [NSDate xh_dateWithDateString:self]; switch (date.weekday) { case 2: weekStr = @"星期一"; break; case 3: weekStr = @"星期二"; break; case 4: weekStr = @"星期三"; break; case 5: weekStr = @"星期四"; break; case 6: weekStr = @"星期五"; break; case 7: weekStr = @"星期六"; break; case 1: weekStr = @"星期天"; break; default: break; } return weekStr;}五.調(diào)用:
self.timeString = @"2017-04-16 13:08:06"; //星期 NSString *time0 = self.timeString.xh_formatWeekDay; //2017年04月16日 NSString *time1 = self.timeString.xh_formatNianYueRi; //2017年04月 NSString *time2 = self.timeString.xh_formatNianYue; //04月16日 NSString *time3 = self.timeString.xh_formatYueRi; //2017年 NSString *time4 = self.timeString.xh_formatNian; //13時(shí)08分01秒 NSString *time5 = self.timeString.xh_formatShiFenMiao; //13時(shí)08分 NSString *time6 = self.timeString.xh_formatShiFen; //08分01秒 NSString *time7 = self.timeString.xh_formatFenMiao; //2017-04-16 NSString *time8 = self.timeString.xh_format_yyyy_MM_dd; //2017-04 NSString *time9 = self.timeString.xh_format_yyyy_MM; //04-16 NSString *time10 = self.timeString.xh_format_MM_dd; //2017 NSString *time11 = self.timeString.xh_format_yyyy; //13:08:06 NSString *time12 = self.timeString.xh_format_HH_mm_ss; //13:08 NSString *time13 = self.timeString.xh_format_HH_mm; //08:06 NSString *time14 = self.timeString.xh_format_mm_ss;
github地址：https://github.com/CoderZhuXH/XHDate
完整項(xiàng)目下載地址：XHDate_jb51.rar
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