- #import "ViewController.h"
-
- @interface ViewController ()
-
- @end
-
- @implementation ViewController
-
- - (void)viewDidLoad {
- [super viewDidLoad];
-
-
-
- // 1、获取当前时间
- NSDate *now = [NSDate date];
- NSDateFormatter *nowFormate = [[NSDateFormatter alloc] init];
- nowFormate.dateFormat = @"yyyy-MM-dd HH:mm:ss";
- NSString *nowTime = [nowFormate stringFromDate:now];
- NSLog(@"nowTime = %@",nowTime);
-
- // 2、拿现在的时间和过去时间或者将来时间对比,计算出相差多少天,多少年,多少秒等等;
- NSDate *beforTime = [nowFormate dateFromString:@"2014-06-14 19:25:00"];
- NSCalendar *calender = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
-
- //世纪
- NSInteger era = kCFCalendarUnitEra;
-
- //年
- NSInteger year = kCFCalendarUnitYear;
-
- //月
- NSInteger month = kCFCalendarUnitMonth;
-
- //小时
- NSInteger hour = kCFCalendarUnitHour;
-
- //分钟
- NSInteger minute = kCFCalendarUnitMinute;
-
- //秒
- NSInteger second = kCFCalendarUnitSecond;
-
- NSDateComponents *compsEra = [calender components:era fromDate:beforTime toDate:now options:0];
- NSDateComponents *compsYear = [calender components:year fromDate:beforTime toDate:now options:0];
- NSDateComponents *compsMonth = [calender components:month fromDate:beforTime toDate:now options:0];
- NSDateComponents *compsHour = [calender components:hour fromDate:beforTime toDate:now options:0];
- NSDateComponents *compsMinute = [calender components:minute fromDate:beforTime toDate:now options:0];
- NSDateComponents *compsSecond = [calender components:second fromDate:beforTime toDate:now options:0];
-
- NSLog(@"相差世纪个数 = %ld",[compsEra era]);
- NSLog(@"相差年个数 = %ld",[compsYear year]);
- NSLog(@"相差月个数 = %ld",[compsMonth month]);
- NSLog(@"相差小时个数 = %ld",[compsHour hour]);
- NSLog(@"相差分钟个数 = %ld",[compsMinute minute]);
- NSLog(@"相差秒个数 = %ld",[compsSecond second]);
-
- // 3、获取时间戳(相对于1970年)
- CGFloat timestamp = now.timeIntervalSince1970;
- NSLog(@"距离1970年有多少秒 = %f",timestamp);
-
- // 4、计算距离现在有多少秒
- CGFloat sinceNow = beforTime.timeIntervalSinceNow;
- NSLog(@"距离现在有多少秒 = %f",fabs(sinceNow));
-
-
- }
-
- @end
输出结果:
2016-06-14 16:46:12.651 Timer[2811:639641] nowTime = 2016-06-14 16:46:12
2016-06-14 16:46:12.654 Timer[2811:639641]相差世纪个数 = 0
2016-06-14 16:46:12.654 Timer[2811:639641]相差年个数 = 1
2016-06-14 16:46:12.654 Timer[2811:639641]相差月个数 = 23
2016-06-14 16:46:12.654 Timer[2811:639641]相差小时个数 = 17541
2016-06-14 16:46:12.654 Timer[2811:639641]相差分钟个数 = 1052481
2016-06-14 16:46:12.654 Timer[2811:639641]相差秒个数 = 63148872
2016-06-14 16:46:12.654 Timer[2811:639641]距离1970年有多少秒 = 1465893972.649262
2016-06-14 16:46:12.654 Timer[2811:639641]距离现在有多少秒 = 63148872.654635
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