intmain(intargc,constchar* argv[]) {
// c语言中
NSDate*data1=[NSDatedate];
NSLog(@"%@",data1);
//时间传唤
NSTimeZone*zone=[NSTimeZonesystemTimeZone];
NSIntegerseconds=[zonesecondsFromGMTForDate:data1];
NSDate*data2=[data1dateByAddingTimeInterval:seconds];
NSLog(@"%@",data2);
// y:年M：月d：日h：小时(24进制) m:分s：秒
//时间格式规定
NSDateFormatter*formatter=[[NSDateFormatteralloc]init];
formatter.dateFormat=@"yyyy-MM-dd hh:mm:ss";
//时间与字符串转唤
//时间转换字符串，，获得的是当前时区
NSString*dateStr=[formatterstringFromDate:data1];
NSLog(@"%@",dateStr);
//格尼时间
NSDate*date3=[formatterdateFromString:dateStr];
NSLog(@"%@",date3);
//时间日历相关操作
NSCalendar*calendar=[[NSCalendaralloc]initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
NSCalendarUnitunit=NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay|NSCalendarUnitHour|NSCalendarUnitMinute|NSCalendarUnitSecond;
NSDateComponents*components=[calendarcomponents:unitfromDate:data1];
NSLog(@"%ld",components.year);
NSLog(@"%ld",components.month);
NSLog(@"%ld",components.day);
NSLog(@"%ld",components.hour);
NSLog(@"%ld",components.minute);
NSLog(@"%ld",components.second);
return0;
//加个😘
}
