西安网站建设公司排行榜,学生制作网站建设 维护,微信公众官网登录入口,泉州企业免费建站1、NSDate
时间与日期的初始化,主要有
[NSDate date]; 2、NSDateFormatter 主要用于NSString和Date之间相互转化//NSDate转NSStringstringFromDate:dt//NSString转NSDatedateFromString 3、NSCalendar和NSDateComponents Date打印出具体时间的年月日和把年月日转化为Date4、N…1、NSDate
时间与日期的初始化,主要有
[NSDate date]; 2、NSDateFormatter 主要用于NSString和Date之间相互转化//NSDate转NSStringstringFromDate:dt//NSString转NSDatedateFromString 3、NSCalendar和NSDateComponents
Date打印出具体时间的年月日和把年月日转化为Date4、NSTimer
定时器(NSTimer *)timerWithTimeInterval:(NSTimeInterval)ti invocation:(NSInvocation *)invocation repeats:(BOOL)yesOrNo;(NSTimer *)scheduledTimerWithTimeInterval:(NSTimeInterval)ti invocation:(NSInvocation *)invocation repeats:(BOOL)yesOrNo; (NSTimer *)timerWithTimeInterval:(NSTimeInterval)ti target:(id)aTarget selector:(SEL)aSelector userInfo:(nullable id)userInfo repeats:(BOOL)yesOrNo;(NSTimer *)scheduledTimerWithTimeInterval:(NSTimeInterval)ti target:(id)aTarget selector:(SEL)aSelector userInfo:(nullable id)userInfo repeats:(BOOL)yesOrNo; 5、测试Demo
main.m文件
int main(int argc, char * argv[]) {autoreleasepool {//NSDate常用方法NSDate *date [NSDate date];NSLog(%, date);NSDate *date1 [[NSDate alloc] initWithTimeIntervalSinceNow:3600 * 24];NSLog(date1 is %, date1);NSDate *date2 [[NSDate alloc] initWithTimeIntervalSinceNow:-3 * 3600 * 24];NSLog(date1 is %, date2);NSLocale *cn [NSLocale currentLocale];NSLog(%, [date1 descriptionWithLocale:cn]);NSLog(%, [date1 earlierDate:date2]);//NSDate转NSStringNSDate *dt [NSDate dateWithTimeIntervalSince1970:3600 * 24 * 366 * 20];NSDate *dt1 [NSDate dateWithTimeIntervalSince1970:0];NSLog(%, dt1);NSDateFormatter *df [[NSDateFormatter alloc] init];[df setDateFormat:公元yyyy年MM月DD日 HH时mm分];NSLog(%, [df stringFromDate:dt]);//NSString转NSDateNSString *str 2018-03-02;NSDateFormatter *df1 [[NSDateFormatter alloc] init];[df1 setDateFormat:yyyy-MM-dd];NSLog(%, [df1 dateFromString:str]);//NSCalendar和NSDateComponents使用NSCalendar *car [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];NSDate *date3 [NSDate date];unsigned unit NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit | NSWeekdayCalendarUnit;NSDateComponents *comp [car components:unit fromDate:date3];NSLog(现在是%ld年, comp.year);NSLog(现在是%ld月, comp.month);NSLog(现在是%ld日, comp.day);NSLog(现在是%ld时, comp.hour);NSLog(现在是%ld分, comp.minute);NSLog(现在是%ld秒, comp.second);NSLog(现在是星期%ld, comp.weekday);NSDateComponents *comp1 [[NSDateComponents alloc] init];comp1.year 2015;comp1.month 4;comp1.day 5;comp1.hour 18;comp1.minute 34;NSDate *date4 [car dateFromComponents:comp1];NSLog(date is %:, date4);return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));}
} ViewControl.m文件(这里实现的定时器)
implementation ViewController- (void)viewDidLoad {[super viewDidLoad];
// Control *control [Control new];
// control.delegate self;
// [control willShowAlert];NSTimer* timer [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:selector(Timered:) userInfo:nil repeats:YES];
}- (void)Timered:(NSTimer*)timer {NSLog(hello chenyu);
}
end 6、运行的结果
2018-07-12 23:03:31.6348700800 cyTest[37918:6787840] hello chenyu
2018-07-12 23:03:32.6349150800 cyTest[37918:6787840] hello chenyu
2018-07-12 23:03:33.6348810800 cyTest[37918:6787840] hello chenyu
2018-07-12 23:03:34.6349380800 cyTest[37918:6787840] hello chenyu
2018-07-12 23:03:35.6349980800 cyTest[37918:6787840] hello chenyu
2018-07-12 23:03:36.6350950800 cyTest[37918:6787840] hello chenyu
2018-07-12 23:03:37.6350860800 cyTest[37918:6787840] hello chenyu2018-07-12 23:14:23.7896400800 cyTest[38218:6796894] Thu Jul 12 23:14:23 2018
2018-07-12 23:14:23.7908440800 cyTest[38218:6796894] date1 is Fri Jul 13 23:14:23 2018
2018-07-12 23:14:23.7914920800 cyTest[38218:6796894] date1 is Mon Jul 9 23:14:23 2018
2018-07-12 23:14:23.8045980800 cyTest[38218:6796894] Friday, July 13, 2018 at 11:14:23 PM China Standard Time
2018-07-12 23:14:23.8048530800 cyTest[38218:6796894] Mon Jul 9 23:14:23 2018
2018-07-12 23:14:23.8053460800 cyTest[38218:6796894] Thu Jan 1 08:00:00 1970
2018-07-12 23:14:23.8059270800 cyTest[38218:6796894] 公元1990年01月16日 08时00分
2018-07-12 23:14:23.8083300800 cyTest[38218:6796894] Fri Mar 2 00:00:00 2018
2018-07-12 23:14:23.8089820800 cyTest[38218:6796894] 现在是2018年
2018-07-12 23:14:23.8091500800 cyTest[38218:6796894] 现在是7月
2018-07-12 23:14:23.8093540800 cyTest[38218:6796894] 现在是12日
2018-07-12 23:14:23.8095580800 cyTest[38218:6796894] 现在是23时
2018-07-12 23:14:23.8096840800 cyTest[38218:6796894] 现在是14分
2018-07-12 23:14:23.8098340800 cyTest[38218:6796894] 现在是23秒
2018-07-12 23:14:23.8104070800 cyTest[38218:6796894] 现在是星期5
2018-07-12 23:14:23.8112110800 cyTest[38218:6796894] date is Sun Apr 5 18:34:00 2015:
2018-07-12 23:14:27.7646330800 cyTest[38218:6796894] hello chenyu
2018-07-12 23:14:28.7647580800 cyTest[38218:6796894] hello chenyu
2018-07-12 23:14:29.7657760800 cyTest[38218:6796894] hello chenyu
2018-07-12 23:14:30.7657920800 cyTest[38218:6796894] hello chenyu
2018-07-12 23:14:31.7654260800 cyTest[38218:6796894] hello chenyu
