NSDate、NSDateFormatter、NSCalendar
#import "ViewController.h"
@interface ViewController ()
@property (nonatomic, strong) NSDateFormatter * dateFormatter;
@property (nonatomic, strong) NSDate * today;
@property (nonatomic, strong) NSDate * tomorrow;
@property (nonatomic, strong) NSDate * yesterday;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
//获取今天昨天和明天等等（NSDate内容）
[self getYesterdayOrtomorrowTime];
//日历（NSCalendar相关内容）
[self aboutCalendar];
}
- (void)aboutCalendar{
NSCalendar *calendar = [NSCalendar currentCalendar];//日历
/**
NSCalendarUnitEra = kCFCalendarUnitEra,//年代
NSCalendarUnitYear = kCFCalendarUnitYear,//年份
NSCalendarUnitMonth = kCFCalendarUnitMonth,//月份
NSCalendarUnitDay = kCFCalendarUnitDay,//几号
NSCalendarUnitHour = kCFCalendarUnitHour,//几点
NSCalendarUnitMinute = kCFCalendarUnitMinute,//几分
NSCalendarUnitSecond = kCFCalendarUnitSecond,//几秒
NSCalendarUnitWeekday = kCFCalendarUnitWeekday,//
NSCalendarUnitWeekdayOrdinal = kCFCalendarUnitWeekdayOrdinal,
NSCalendarUnitQuarter NS_ENUM_AVAILABLE(10_6, 4_0) = kCFCalendarUnitQuarter,
NSCalendarUnitWeekOfMonth NS_ENUM_AVAILABLE(10_7, 5_0) = kCFCalendarUnitWeekOfMonth,
NSCalendarUnitWeekOfYear NS_ENUM_AVAILABLE(10_7, 5_0) = kCFCalendarUnitWeekOfYear,
NSCalendarUnitYearForWeekOfYear NS_ENUM_AVAILABLE(10_7, 5_0) = kCFCalendarUnitYearForWeekOfYear,
NSCalendarUnitNanosecond NS_ENUM_AVAILABLE(10_7, 5_0) = (1 << 15),
NSCalendarUnitCalendar NS_ENUM_AVAILABLE(10_7, 4_0) = (1 << 20),
NSCalendarUnitTimeZone NS_ENUM_AVAILABLE(10_7, 4_0) = (1 << 21),
*/
/**************just return one value(从日期中获取到年月日等等)************/
NSInteger unitData = [calendar component:NSCalendarUnitYearForWeekOfYear fromDate:self.today];
NSLog(@"unitData == %ld",unitData);
/**************比较两个日期的年月日等************/
/**
*
NSOrderedAscending = -1L, 升序
NSOrderedSame, 相同
NSOrderedDescending 降序
*/
NSComparisonResult result = [calendar compareDate:self.yesterday toDate:self.tomorrow toUnitGranularity:NSCalendarUnitYear];
NSLog(@"%ld", result);
/**************get components from an object of NSDate, e.g.year month day****************/
NSDateComponents * components = [calendar components:NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay fromDate:self.today];
NSDateComponents * components2 = [calendar components:NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay fromDate:self.yesterday];
NSLog(@"components 0 == %@", components);
/*****************difference of two NSDate object, result:e.g.1 year 1 month 0 day 4 minute*******************/
NSDateComponents * components1 = [calendar components:NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond fromDate:self.today toDate:self.tomorrow options:0];
NSLog(@"components 1 == %@", components1);
/*****************difference of two NSDateComponents object, result:e.g.1 year 1 month 0 day 4 minute*********************/
NSDateComponents * components3 = [calendar components:NSCalendarUnitYear | NSCalendarUnitMonth fromDateComponents:components2 toDateComponents:components options:0];
NSLog(@"components3 == %@", components3);
/**************** get components from date with timeZone******************/
NSDateComponents * components4 = [calendar componentsInTimeZone:[NSTimeZone timeZoneWithName:@"Asia/Beijing"] fromDate:self.today];
NSLog(@"components4 == %@", components4);
NSDate * zzdate = [calendar dateFromComponents:components4];
NSLog(@"zzdate == %@", zzdate);
}
#pragma mark - 根据时间间隔获得时间戳
- (NSString *)getTimeStampWithTimeInterval:(CGFloat)timeInterval{
NSDate * date = [NSDate dateWithTimeIntervalSince1970:timeInterval];
NSString * timeStr = [self.dateFormatter stringFromDate:date];
NSLog(@"%@", timeStr);
return timeStr;
}
#pragma mark - 根据传入的时间获取时间戳
- (NSString *)getTimeStampWithDate:(NSDate *)date{
NSString * tempStr = [self.dateFormatter stringFromDate:date];
NSLog(@"%@", tempStr);
return tempStr;
}
#pragma mark - 获取当前时间，昨天、明天等时间
- (void)getYesterdayOrtomorrowTime{
//今天目前的时间
self.today = [NSDate date];
NSLog(@"today == %@", self.today);
//设置时间间隔
NSTimeInterval oneDayTimeInterval = 365 * 56 * 60 * 60 + 120 + 50.6;
//明天
self.tomorrow = [NSDate dateWithTimeIntervalSinceNow:oneDayTimeInterval];
NSLog(@"tomorrow == %@", self.tomorrow);
//昨天
self.yesterday = [NSDate dateWithTimeIntervalSinceNow:-oneDayTimeInterval];
NSLog(@"yesterday == %@", self.yesterday);
//比较两个日期，早一些的
NSDate * earlierDate = [self.yesterday earlierDate:self.today];
NSLog(@"earlierDate == %@", earlierDate);
//比较两个日期，晚一些的
NSDate * laterDate = [self.yesterday laterDate:self.tomorrow];
NSLog(@"laterDate == %@", laterDate);
}
- (NSDateFormatter *)dateFormatter{
if (!_dateFormatter) {
_dateFormatter = [[NSDateFormatter alloc] init];
/***************************设置时间格式**************************/
//设定时间格式,这里可以设置成自己需要的格式
[_dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
/**系统自带的时间格式
* dateFormatter.dateStyle = kCFDateFormatterMediumStyle;
NSDateFormatterNoStyle = kCFDateFormatterNoStyle,
NSDateFormatterShortStyle = kCFDateFormatterShortStyle,//“11/23/37” or “3:30pm”
NSDateFormatterMediumStyle = kCFDateFormatterMediumStyle,//\"Nov 23, 1937\"
NSDateFormatterLongStyle = kCFDateFormatterLongStyle,//\"November 23, 1937” or “3:30:32pm\"
NSDateFormatterFullStyle = kCFDateFormatterFullStyle//“Tuesday, April 12, 1952 AD” or "3:30:42pm PST"
*/
/*************************设置时区**************************/
NSTimeZone* sourceTimeZone = [NSTimeZone timeZoneWithName:@"Asia/Beijing"];
[_dateFormatter setTimeZone:sourceTimeZone];
}
return _dateFormatter;
}
