获取当前的天数,月数,星期天,时分秒：总结

#import "ViewController.h"

@interface ViewController ()

@property (nonatomic,assign) NSInteger year;

@property (nonatomic,assign) NSInteger month;

@property (nonatomic,assign) NSInteger day;

@property (nonatomic,assign) NSInteger hour;

@property (nonatomic,assign) NSInteger minute;

@property (nonatomic,assign) NSInteger second;

@property (nonatomic,assign) NSInteger weak;

@end

@implementation ViewController

- (void)viewDidLoad {

[super viewDidLoad];

// Do any additional setup after loading the view, typically from a nib.

[self initData];

}

- (void)initData

{

NSCalendar *cal = [NSCalendar currentCalendar];

NSInteger unitFlags = NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit|NSWeekdayCalendarUnit|NSHourCalendarUnit|NSMinuteCalendarUnit|NSSecondCalendarUnit;

NSDateComponents *d = [cal components:unitFlags fromDate:[NSDate date]];

self.year = [d year];

self.month = [d month];

self.day = [d day];

self.hour = [d hour];

self.minute = [d minute];

self.second = [d second];

self.weak = [d weekday];

NSLog(@"%ld年",(long)self.year);

NSLog(@"%ld月",(long)self.month);

NSLog(@"%ld日",(long)self.day);

NSLog(@"%ld时",(long)self.hour);

NSLog(@"%ld分",(long)self.minute);

NSLog(@"%ld秒",(long)self.second);

NSLog(@"星期%ld",(long)self.weak-1);

NSArray * arrWeek=[NSArray arrayWithObjects:@"星期日",@"星期一",@"星期二",@"星期三",@"星期四",@"星期五",@"星期六", nil];

NSLog(@"%@", [NSString stringWithFormat:@"%@",[arrWeek objectAtIndex:[d weekday] - 1]]);

//现在的时间截

UInt64 recordTime = [[NSDate date] timeIntervalSince1970];

//月初的时间截

UInt64 passTime = (recordTime - (self.day-1)*86400-self.hour*3600-self.minute*60-self.second);

NSDateFormatter *formatter = [[NSDateFormatter alloc] init];

[formatter setDateStyle:NSDateFormatterMediumStyle];

[formatter setTimeStyle:NSDateFormatterShortStyle];

[formatter setDateFormat:@"YYYY-MM-dd HH:mm:ss"];

//时间戳转时间的方法

NSDate *date1 = [NSDate dateWithTimeIntervalSince1970:recordTime];//少八个小时

NSString *time = [formatter stringFromDate:date1];//正常

NSLog(@"nowTime =  %@",time);

NSDate *date2 = [NSDate dateWithTimeIntervalSince1970:passTime];//少八个小时

NSString *time2 = [formatter stringFromDate:date2];//正常

NSLog(@"nowTime =  %@",time2);

NSDate *date3 = [NSDate dateWithTimeIntervalSince1970:passTime-1];//少八个小时

NSString *time3 = [formatter stringFromDate:date3];//正常

NSLog(@"nowTime =  %@",time3);

NSDate *date4 = [NSDate dateWithTimeIntervalSince1970:passTime-31*86400];//少八个小时

NSString *time4 = [formatter stringFromDate:date4];//正常

NSLog(@"nowTime =  %@",time4);

//调用月的天数

NSInteger i = [self howManyDaysInThisMonth:self.month];

NSLog(@"%ld",(long)i);

}

// 获取今年指定月的天数

- (NSInteger)howManyDaysInThisMonth :(NSInteger)imonth {

int year = [[self years][0] intValue];

if((imonth == 1)||(imonth == 3)||(imonth == 5)||(imonth == 7)||(imonth == 8)||(imonth == 10)||(imonth == 12))

return 31 ;

if((imonth == 4)||(imonth == 6)||(imonth == 9)||(imonth == 11))

return 30;

if((year%4 == 1)||(year%4 == 2)||(year%4 == 3))

{

return 28;

}

if(year%400 == 0)

return 29;

if(year%100 == 0)

return 28;

return 29;

}

// 获取今年指定月

- (NSInteger)howManyMonth :(NSInteger)imonth {

int year = [[self years][1] intValue];

return year;

}

#pragma mark 获取当前的年月

- (NSArray *) years {

NSMutableArray *yearArr = [[NSMutableArray alloc]init];

NSDate *now = [NSDate date];

NSCalendar *calendar = [NSCalendar currentCalendar];

NSUInteger unitFlags = NSCalendarUnitYear | NSCalendarUnitMonth;

NSDateComponents *dateComponent = [calendar components:unitFlags fromDate:now];

NSInteger year = [dateComponent year];

NSInteger month = [dateComponent month];

[yearArr addObject:@(year)];

[yearArr addObject:@(month)];

return yearArr;

}