时间日期判断实例

直接看代码吧：

//  Created by cctv on 15/8/7.

//  Copyright (c) 2015年 cctv. All rights reserved.

//

#import "NSString+add.h"

#import "NSDate+add.h"

@implementation NSString (add)

+ (NSString *)stringWithDateString:(NSString*) dateString

{
     //  dateString -> @"Mon Nov 02 19:32:59 +0800 2015"

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

dateF.dateFormat = @"EEE MMM dd HH:mm:ss Z yyyy";

dateF.locale = [[NSLocale alloc] initWithLocaleIdentifier:@"en-AS"];

[dateF dateFromString:dateString];

// 创建时间

NSDate *date = [dateF dateFromString:dateString];

//判断创建时间与当前时间的关系

if (date.dateIsThisDay) {

NSDateComponents *dateComp = [date dateIsToday];

if (dateComp.hour >= 1) {

dateF.dateFormat = [NSString stringWithFormat:@"%d小时前",dateComp.hour];

return [dateF stringFromDate:date];

}else if(dateComp.minute >= 1 ){

dateF.dateFormat = [NSString stringWithFormat:@"%d分钟前",dateComp.minute];

return [dateF stringFromDate:date];

}else{

return @"刚刚";

}

}else if (date.dateIsYesterDay){

dateF.dateFormat = @"昨天 HH:mm";

return [dateF stringFromDate:date];

}else if(date.dateIsThisYear){

dateF.dateFormat = @"MM-dd HH:mm";

return [dateF stringFromDate:date];

}else{

dateF.dateFormat = @"yyyy-MM-dd HH:mm";

return [dateF stringFromDate:date];

}

}

@end

-－－－－－－－。。。。。－－－－－－

#import "NSDate+add.h"

@implementation NSDate (add)

- (BOOL)dateIsThisYear

{

NSCalendar *calendar = [NSCalendar currentCalendar];

NSDateComponents *nowComp = [calendar components:(NSCalendarUnitYear) fromDate:[NSDate date]];

NSDateComponents *selfComp = [calendar components:(NSCalendarUnitYear) fromDate:self];

return nowComp.year == selfComp.year;

}

- (BOOL)dateIsThisDay

{

NSCalendar *calendar = [NSCalendar currentCalendar];

NSDateComponents *nowComp = [calendar components:(NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay) fromDate:[NSDate date]];

NSDateComponents *selfComp = [calendar components:(NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay) fromDate:self];

return nowComp.year == selfComp.year && nowComp.month == selfComp.month && nowComp.day == selfComp.day;

}

- (BOOL)dateIsYesterDay

{

NSCalendar *calendar = [NSCalendar currentCalendar];

NSDateComponents *nowComp = [calendar components:(NSCalendarUnitYear) fromDate:[NSDate date]];

NSDateComponents *selfComp = [calendar components:(NSCalendarUnitYear) fromDate:self];

return nowComp.year == selfComp.year;

}

- (NSDateComponents*)dateIsToday

{

NSCalendar *calendar = [NSCalendar currentCalendar];

NSDateComponents *dateComp = [calendar components:NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond fromDate:self toDate:[NSDate date] options:0];

return dateComp;

}

@end