的UIDatePicker和NSDate的

Question

我有一个NSDate我从一个的UIDatePicker得到。

IBOutlet UIDatePicker *dueDate;
NSDate *selectedDate = [dueDate date];

我如何获取每月从dueDate在int的形式？ （1月，2月为等）

Answer 1

NSCalendar *calendar = [NSCalendar currentCalendar];
NSDateComponents *components = [calendar components:NSMonthCalendarUnit fromDate:[dueDate date]];
NSInteger month = [components month];

Answer 2

使用-[NSCalendar components:fromDate:]例如这里的例子：

HTTP：/ /developer.apple.com/iphone/library/documentation/Cocoa/Reference/Foundation/Classes/NSCalendar_Class/Reference/NSCalendar.html

Answer 3

NSDateFormatter *dateFormat = [[[NSDateFormatter alloc] initWithDateFormat:@"%m" allowNaturalLanguage:NO] autorelease];
int month = [[dateFormat stringFromDate:dueDate] intValue];