检测时间是否以小时为单位的简单方法是什么？

Question

我用 timeInterval 一分钟在我的项目中使用 UIDatePickerView。选择时间后，如果时间以小时为单位，那么我必须做一些事情。那么我如何检测用户是否选择了以小时为单位的时间？

Answer 1

Try this one , you can get hours between two date.

NSDate* date1 = someDate;
 NSDate* date2 = someOtherDate;
 NSTimeInterval distanceBetweenDates = [date1 timeIntervalSinceDate:date2];
 double secondsInAnHour = 3600;
 NSInteger hoursBetweenDates = distanceBetweenDates / secondsInAnHour;

Answer 2

NSDateFormatter *timeFormatter = [[[NSDateFormatter alloc]init]autorelease];
timeFormatter.dateFormat = @"HH";


NSString *date_Hour= [timeFormatter stringFromDate: localDate];

获取小时的简单方法仅使用 NSDateComponents class

NSDateComponents *components = [[NSCalendar currentCalendar] components:NSHourCalendarUnit fromDate:[NSDate date]]; 

NSInteger hour= [components hour];

Answer 3

我自己的问题终于得到了答案

    NSDateFormatter *formatter23 = [[NSDateFormatter alloc]init];
    [formatter23 setDateFormat:@"yyyy-MM-dd--HH:mm"];
    NSDate* date1 = datePicker.date;
    [formatter23 setDateFormat:@"mm"];
if ([[formatter23 stringFromDate:date1] isEqualToString:@"00"] || [[formatter23 stringFromDate:date1] isEqualToString:@"30"]){
    NSLog(@"Date is in half an hour or hour");
}    else{
    NSLog(@"Some other");
}

检测时间是否以小时为单位的简单方法是什么？

What is the simple way to detect time is in hours or not?

iphone

objective-c

uidatepicker

nstimeinterval

ios