日期字符串转化为年月日

日期字符串转化为年月日

若你只是想把绝对日期字符串（至1970到现在的毫秒数）转化为年月日，时分秒，可以建立一个分类，使用系统函数自己转化。不需要我上篇文章说的完全自己实现日期转化函数。 注意： 服务器默认记路的日期字符串是精确的毫秒，苹果是默认精确到秒。 调用例子：

"%lld", model.startPoint.obtainTime*1000]; _dateLabel.text = [time dateFomatterStringWithMD];

NSString+Extension.h

#import @interface NSString (Extension)/** * 把时间戳格式化为 MM月dd日 EEE HH:mm 的格式 */- (NSString *)dateFomatterStringWithMDEHM;/** * 把时间戳格式化为 yyyy年MM月dd日 HH:mm 的格式 */- (NSString *)dateFomatterStringWithYMDHM;/** * 把时间戳格式化为 yyyy.MM.dd HH:mm 的格式 */- (NSString *)dateFomatterStringWithymdhm;/** * 把时间戳格式化为 MM月dd日 HH:mm 的格式 */- (NSString *)dateFomatterStringWithMDHM;/** * 把时间戳格式化为 HH:mm 的格式 */- (NSString *)dateFomatterStringWithHM;/** * 把时间戳格式化为今天(*日) HH:mm 的格式 */- (NSString *)dateFomatterStringWithDayHM;/** * 把时间戳格式化为 MM月dd日的格式 */- (NSString *)dateFomatterStringWithMD;/** * 把时间戳格式化为 yyyy-MM-dd 的格式 */- (NSString *)dateFomatterStringWithYMD;@end

NSString+Extension.m

#import "NSString+Extension.h"@implementation NSString (Extension)#pragma mark - 把时间戳格式化为 MM月dd日 EEE HH:mm 的格式- (NSString *)dateFomatterStringWithMDEHM;{ FLDDLogDebug(@"函数"); NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; [formatter setDateStyle:NSDateFormatterMediumStyle]; [formatter setTimeStyle:NSDateFormatterShortStyle]; [formatter setDateFormat:@"MM月dd日 EEE HH:mm"]; NSDate *confromTimesp = [NSDate dateWithTimeIntervalSince1970:[self longLongValue]/1000]; return [formatter stringFromDate:confromTimesp];}#pragma mark - 把时间戳格式化为 yyyy年MM月dd日 HH:mm 的格式- (NSString *)dateFomatterStringWithYMDHM;{ FLDDLogDebug(@"函数"); NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; [formatter setDateStyle:NSDateFormatterMediumStyle]; [formatter setTimeStyle:NSDateFormatterShortStyle]; [formatter setDateFormat:@"yyyy年MM月dd日 HH:mm"]; NSDate *confromTimesp = [NSDate dateWithTimeIntervalSince1970:[self longLongValue]/1000]; return [formatter stringFromDate:confromTimesp];}#pragma mark - 把时间戳格式化为 yyyy.MM.dd HH:mm 的格式- (NSString *)dateFomatterStringWithymdhm{ FLDDLogDebug(@"函数"); NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; [formatter setDateStyle:NSDateFormatterMediumStyle]; [formatter setTimeStyle:NSDateFormatterShortStyle]; [formatter setDateFormat:@"yyyy.MM.dd HH:mm"]; NSDate *confromTimesp = [NSDate dateWithTimeIntervalSince1970:[self longLongValue]/1000]; return [formatter stringFromDate:confromTimesp];}#pragma mark - 把时间戳格式化为 yyyy的格式- (NSString *)dateFomatterStringWithy{ FLDDLogDebug(@"函数"); NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; [formatter setDateStyle:NSDateFormatterMediumStyle]; [formatter setTimeStyle:NSDateFormatterShortStyle]; [formatter setDateFormat:@"yyyy"]; NSDate *confromTimesp = [NSDate dateWithTimeIntervalSince1970:[self longLongValue]/1000]; return [formatter stringFromDate:confromTimesp];}#pragma mark - 把时间戳格式化为 MM月dd日 HH:mm 的格式- (NSString *)dateFomatterStringWithMDHM { NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; [formatter setDateStyle:NSDateFormatterMediumStyle]; [formatter setTimeStyle:NSDateFormatterShortStyle]; [formatter setDateFormat:@"MM月dd日 HH:mm"]; NSDate *confromTimesp = [NSDate dateWithTimeIntervalSince1970:[self longLongValue]/1000]; return [formatter stringFromDate:confromTimesp];}#pragma mark - 把时间戳格式化为 MM月dd日的格式- (NSString *)dateFomatterStringWithMD { NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; [formatter setDateStyle:NSDateFormatterMediumStyle]; [formatter setTimeStyle:NSDateFormatterShortStyle]; [formatter setDateFormat:@"MM月dd日"]; NSDate *confromTimesp = [NSDate dateWithTimeIntervalSince1970:[self longLongValue]/1000]; return [formatter stringFromDate:confromTimesp];}#pragma mark - 把时间戳格式化为 HH:mm 的格式- (NSString *)dateFomatterStringWithHM { NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; [formatter setDateStyle:NSDateFormatterMediumStyle]; [formatter setTimeStyle:NSDateFormatterShortStyle]; [formatter setDateFormat:@"HH:mm"]; NSDate *confromTimesp = [NSDate dateWithTimeIntervalSince1970:[self longLongValue]/1000]; return [formatter stringFromDate:confromTimesp];}#pragma mark - 把时间戳格式化为今天(*日) HH:mm 的格式- (NSString *)dateFomatterStringWithDayHM { long long nowTime = (long long)([[NSDate date] timeIntervalSince1970] * 1000); if([self longLongValue] < 100000) { return @"未知时间"; } NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; if(ABS(nowTime - [self longLongValue]) > 3600000) { [formatter setDateStyle:NSDateFormatterMediumStyle]; [formatter setTimeStyle:NSDateFormatterShortStyle]; [formatter setDateFormat:@"dd日"]; NSDate *confromTimesp = [NSDate dateWithTimeIntervalSince1970:[self longLongValue]/1000]; NSString *dayStr = [formatter stringFromDate:confromTimesp]; formatter = [[NSDateFormatter alloc] init]; [formatter setDateStyle:NSDateFormatterMediumStyle]; [formatter setTimeStyle:NSDateFormatterShortStyle]; [formatter setDateFormat:@"HH:mm"]; confromTimesp = [NSDate dateWithTimeIntervalSince1970:[self longLongValue]/1000]; NSString *hourMinuteStr = [formatter stringFromDate:confromTimesp]; return [[NSString alloc] initWithFormat:@"%@ %@",dayStr,hourMinuteStr]; } else { [formatter setDateStyle:NSDateFormatterMediumStyle]; [formatter setTimeStyle:NSDateFormatterShortStyle]; [formatter setDateFormat:@"dd日"]; NSDate *confromTimesp = [NSDate dateWithTimeIntervalSince1970:[self longLongValue]/1000]; NSString *dayStr = [formatter stringFromDate:confromTimesp]; confromTimesp = [NSDate dateWithTimeIntervalSince1970:nowTime/1000]; NSString *todayStr = [formatter stringFromDate:confromTimesp]; if([dayStr isEqualToString: todayStr]) { formatter = [[NSDateFormatter alloc] init]; [formatter setDateStyle:NSDateFormatterMediumStyle]; [formatter setTimeStyle:NSDateFormatterShortStyle]; [formatter setDateFormat:@"HH:mm"]; confromTimesp = [NSDate dateWithTimeIntervalSince1970:[self longLongValue]/1000]; NSString *hourMinuteStr = [formatter stringFromDate:confromTimesp]; return [[NSString alloc] initWithFormat:@"今天 %@",hourMinuteStr]; } else { formatter = [[NSDateFormatter alloc] init]; [formatter setDateStyle:NSDateFormatterMediumStyle]; [formatter setTimeStyle:NSDateFormatterShortStyle]; [formatter setDateFormat:@"HH:mm"]; confromTimesp = [NSDate dateWithTimeIntervalSince1970:[self longLongValue]/1000]; NSString *hourMinuteStr = [formatter stringFromDate:confromTimesp]; return [[NSString alloc] initWithFormat:@"%@ %@",dayStr,hourMinuteStr]; } }}/** * 把时间戳格式化为 yyyy-MM-dd 的格式 */- (NSString *)dateFomatterStringWithYMD;{ if([self longLongValue] < 100000) { return @"未知时间"; } NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; [formatter setDateStyle:NSDateFormatterMediumStyle]; [formatter setTimeStyle:NSDateFormatterShortStyle]; [formatter setDateFormat:@"yyyy-MM-dd"]; NSDate *confromTimesp = [NSDate dateWithTimeIntervalSince1970:[self longLongValue]/1000]; return [formatter stringFromDate:confromTimesp];}@end

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