1.//得到當(dāng)前時間
- (NSString *)getCurrentTime {
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"yyyy-MM-dd"];
NSString *dateTime = [formatter stringFromDate:[NSDate date]];
return dateTime;
}
//將字符串轉(zhuǎn)成NSDate類型
- (NSDate *)dateFromString:(NSString *)dateString {
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat: @"yyyy-MM-dd"];
NSDate *destDate= [dateFormatter dateFromString:dateString];
return destDate;
}
NSDate *date = [NSDate? date];//當(dāng)前時間
NSDate *lastDay = [NSDate dateWithTimeInterval:-24*60*60 sinceDate:date];//前一天
NSDate *nextDat = [NSDate dateWithTimeInterval:24*60*60 sinceDate:date];//后一天
2.//得到當(dāng)前月份或者（年份）的上一個 和 下一個月份（年份）
-(void)setUPAndDownDate:(NSInteger)num{
NSDate *currentDate = [NSDate date];
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"yyyy-MM"];
NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *lastMonthComps = [[NSDateComponents alloc] init];
//[lastMonthComps setYear:1];
[lastMonthComps setMonth:num];
NSDate *newdate = [calendar dateByAddingComponents:lastMonthComps toDate:currentDate options:0];
NSString *dateStr = [formatter stringFromDate:newdate];
NSLog(@"date str = %@", dateStr);
}
//日期
-(NSString *)getCurrntTimeDay:(NSInteger)num Date:(NSDate *)date{
? ? NSDate *nextDat = [NSDate dateWithTimeInterval:num*24*60*60 sinceDate:date];//后num天
? ? NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
? ? [formatter setDateFormat:@"MM月dd日"];
? ? NSString *dateTime = [formatter stringFromDate:nextDat];
? ? return dateTime;
}
//返回星期幾
-(NSString*)weekdayStringFromDate:(NSDate*)inputDate {
??? NSArray *weekdays = [NSArray arrayWithObjects: [NSNull null], @"星期日", @"星期一", @"星期二", @"星期三", @"星期四", @"星期五", @"星期六", nil];
??? NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
??? NSCalendarUnit calendarUnit = NSCalendarUnitWeekday;
??? NSDateComponents *theComponents = [calendar components:calendarUnit fromDate:inputDate];
??? return [weekdays objectAtIndex:theComponents.weekday];
???
}
//直接調(diào)用 正數(shù)表示往后的月份 锌订，負(fù)數(shù)表示往前的月份旱物。
多多支持；帧５鲋辍侥衬！
