【代碼筆記】和目前時間比較，筆記目前時間

【代碼筆記】和目前時間比較，筆記目前時間

代碼：

#import "RootViewController.h"@interface RootViewController ()@end@implementation RootViewController- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil{    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];    if (self) {        // Custom initialization    }    return self;}- (void)viewDidLoad{    [super viewDidLoad];    // Do any additional setup after loading the view.     //獲得指定日期的格式    NSLog(@"---%@----",[self changeTheDate:@"2013-04-18" ByDateType:@"yyyy-M-dd"]);    //星期幾    NSLog(@"---%@---",[self getTheWeekDay:@"2013-04-18"]);        //一年的第幾周，每周的第幾天，比較兩天是不是同一個星期    NSDate* today = [NSDate date];    NSLog(@"--%ld---",(long)[self didWeekOfYear:today]);    NSLog(@"---%ld---",(long)[self didWeekDay:today]);    NSLog(@"---%ld---",(long)[self didSameWeek:today date:today]);        }#pragma -mark -獲得指定日期的格式/*獲得指定的日期格式  paramDate:日期的字串表示：“2013-04-18” paramDateType：要轉化的日期格式：“yyyy-M-dd”  */- (NSString *)changeTheDate:(NSString *)paramDate ByDateType:(NSString *)paramDateType{    // 將日期轉化為需要的格式 yyyy-MM-dd 轉化為 yyyy-M-dd        NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init];    [dateFormatter setDateFormat:@"yyyy-MM-dd"];    NSDate *tempDate = [dateFormatter dateFromString:paramDate];    [dateFormatter setDateFormat:paramDateType];            NSString *theDate= [dateFormatter stringFromDate:tempDate];    NSString *result=[[NSString alloc] initWithString:theDate] ;    return result;    }#pragma -mark -星期幾/*星期幾*/- (NSString *)getTheWeekDay:(NSString *)paramDate{    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init];    [dateFormatter setDateFormat:@"yyyy-M-dd"];    NSDate *theDate= [dateFormatter dateFromString:paramDate];        NSString *result=nil;        NSInteger theWeek=[self didWeekDay:theDate];    switch (theWeek) {        case 1:            result=@"星期日";            break;        case 2:            result=@"星期一";            break;        case 3:            result=@"星期二";            break;        case 4:            result=@"星期三";            break;        case 5:            result=@"星期四";            break;        case 6:            result=@"星期五";            break;        case 7:            result=@"星期六";            break;                    default:            break;    }    return result;                }#pragma -mark -每周的第幾天//取目前時間是星期幾- (NSInteger) didWeekDay:(NSDate*)date{    NSCalendar *gregorian = [[NSCalendar alloc]                             initWithCalendarIdentifier:NSGregorianCalendar];    NSDateComponents *weekdayComponents = [gregorian components:(NSDayCalendarUnit | NSWeekdayCalendarUnit) fromDate:date];    NSInteger tempweekday = [weekdayComponents weekday];    return tempweekday;}#pragma -mark -每年的第幾周//取目前時間是每年中的第幾周- (NSInteger) didWeekOfYear:(NSDate*)date{    NSInteger unitFlags = NSWeekOfYearCalendarUnit;    NSCalendar *gregorian = [NSCalendar currentCalendar];    NSDateComponents *weekdayComponents = [gregorian components:unitFlags fromDate:date];    NSInteger weekOfYear = [weekdayComponents weekOfYear];    return weekOfYear;    }#pragma -mark -判斷是不是一個星期//判斷是不是同一個星期- (BOOL) didSameWeek:(NSDate*)date1 date:(NSDate*)date2{        NSInteger week1 = [self didWeekOfYear:date1];    NSInteger week2 = [self didWeekOfYear:date2];        return week1 == week2;}@end