Iphone 使用NSDate创建事件
有没有办法为NSDate创建事件?这是我的密码Iphone 使用NSDate创建事件,iphone,sdk,ios-4.2,Iphone,Sdk,Ios 4.2,有没有办法为NSDate创建事件?这是我的密码 NSDate *date = [NSDate date]; NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc] init] autorelease]; [dateFormatter setDateFormat:@"MMMM d, yyyy"]; NSString *dateStr = [dateFormatter stringFromDa
NSDate *date = [NSDate date];
NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc] init] autorelease];
[dateFormatter setDateFormat:@"MMMM d, yyyy"];
NSString *dateStr = [dateFormatter stringFromDate:date];
myDate.text = dateStr;
例如,如果日期=2月12日;
myDate.text=@“母亲节”
像这样的东西当然是。您必须使用NSDateComponents将日期拆分为日和月 您可以编写如下方法:
- (BOOL)date:(NSDate *)date isSameAsDay:(NSInteger)day andMonth:(NSInteger)month {
NSUInteger dateFlags = NSDayCalendarUnit | NSMonthCalendarUnit;
NSDateComponents *components = [[NSCalendar currentCalendar] components:dateFlags fromDate:date];
if ([components day] == day && [components month] == month) {
return YES;
}
return NO;
}
你会这样使用它吗
if ([self date:[NSDate date] isSameAsDay:12 andMonth:2]) {
myDate.text = @"Mother Day";
}
这应该做到:
NSDate *today = [NSDate date]; // Get ref to todays date
NSCalendar *gregorian = [[NSCalendar alloc]
initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *weekdayComponents =
[gregorian components:(NSWeekdayOrdinalCalendarUnit | NSWeekdayCalendarUnit | NSMonthCalendarUnit) fromDate:today];
NSInteger weekday = [weekdayComponents weekday]; // Sun == 1, Mon == 2, Tue...
NSInteger weekdayOrdinal = [weekdayComponents weekdayOrdinal]; // First weekday month == 1 etc...
NSInteger month = [weekdayComponents month];
NSLog (@"%i %i %i", weekday, weekdayOrdinal, month);
// Mothers day is every second Sunday of May so weekday == 1, weekdayOrdinal == 2, month == 5
if ((weekday == 1) && (weekdayOrdinal == 2) && (month == 5)) {
NSLog (@"It's mothers day!");
}
[gregorian release];