IOS 公共类-MyDateUtil 日期处理Util

IOS 公共类-MyDateUtil 日期处理Util

此为处理日期的公共类。适用IOS6+

.h文件：

 #import <Foundation/Foundation.h>
 //适用 IOS6+
 @interface MyDateUtil

 //返回一个新的日期，新的日期将会只保留年月日
 +(NSDate*) keepYearMonthDayWithDate:(NSDate*)oldDate;
 //返回日期的年份
 +(int)getYearWithDate:(NSDate *)date;
 //返回日期的月份
 +(int) getMonthWithDate:(NSDate*) date;
 //返回日期的日份
 +(int) getDayWithDate:(NSDate*) date;
 //传入年月日，返回日期类型
 +(NSDate*) getDateFromYear:(int)year andMonth:(int)month andDay:(int)day;
 //传入一个日期的字符串，一个日期字符串的分隔符，返回日期。 默认为"/"，即传入"01/05/2012"和"/"，返回日期类型。 "dd/MM/yyyy" "01/05/2012"
 +(NSDate*) getDateFromText:(NSString*)dateStr andDateSplit:(NSString*)split;

.m文件：

 #import <Foundation/Foundation.h>

 @implementation MyDateUtil:NSObject

 +(NSDate*) keepYearMonthDayWithDate:(NSDate*)oldDate {
     NSCalendar *oldCal = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
     NSDateComponents *oldDateComponents = [oldCal components:NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit fromDate:oldDate];

     NSDate *result = [oldCal dateFromComponents:oldDateComponents];
     return result;
 }

 +(int)getYearWithDate:(NSDate *)date {
     NSCalendar *cal = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
     NSDateComponents *dateComp = [cal components:NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit fromDate:date];
     return dateComp.year;
 }

 +(int) getMonthWithDate:(NSDate*) date {
     NSCalendar *cal = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
     NSDateComponents *dateComp = [cal components:NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit fromDate:date];
     return dateComp.month;
 }

 +(int) getDayWithDate:(NSDate*) date {
     NSCalendar *cal = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
     NSDateComponents *dateComp = [cal components:NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit fromDate:date];
     return dateComp.day;
 }

 +(NSDate*) getDateFromYear:(int)year andMonth:(int)month andDay:(int)day {
     NSDateComponents *dateComp = [[NSDateComponents alloc] init];
     dateComp.year = year;
     dateComp.month = month;
     dateComp.day = day;
     NSCalendar *cal = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
     NSDate *d = [cal dateFromComponents:dateComp];
     return d;
 }

 //datestr must like: "dd/MM/yyyy" "01/05/2012"
 +(NSDate*) getDateFromText:(NSString*)dateStr andDateSplit:(NSString*)split{
     if (!split) {
         split = @"/";
     }
     NSArray *dateStrArr = [dateStr componentsSeparatedByString:@"/"];
     return [self getDateFromYear:[[dateStrArr objectAtIndex:] intValue] andMonth:[[dateStrArr objectAtIndex:] intValue] andDay:[[dateStrArr objectAtIndex:] intValue]];
 }

 @end

若要下载，请访问github：https://github.com/cjt321/MyDateUtil

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