將NSDate對象設置爲自定義日期，並結合datepicker日期？

Question

我想創建一個NSDate對象，其日期設置爲當前日期，但設置爲日期選擇器中的時間的時間（因爲日期選擇器的模式是一次）。我怎樣才能做到這一點？

Answer 1

如果你真的想使用自定義日期使用這樣的東西。

- (IBAction)dpChange:(UIDatePicker *)sender { 
    // replace this with your custom date. 
    NSDate *myCustomDate = [NSDate dateWithTimeIntervalSinceNow:7*24*60*60]; 

    NSInteger dateFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit; 
    NSDateComponents *dateComponents = [[NSCalendar currentCalendar] components:dateFlags fromDate:myCustomDate]; 

    NSDate *myCustomTime = [sender date]; 
    NSInteger timeFlags = NSHourCalendarUnit | NSMinuteCalendarUnit; 
    NSDateComponents *timeComponents = [[NSCalendar currentCalendar] components:timeFlags fromDate:myCustomTime]; 

    NSDateComponents *newComponents = [[[NSDateComponents alloc] init] autorelease]; 
    [newComponents setYear:[dateComponents year]]; 
    [newComponents setMonth:[dateComponents month]]; 
    [newComponents setDay:[dateComponents day]]; 
    [newComponents setHour:[timeComponents hour]]; 
    [newComponents setMinute:[timeComponents minute]]; 
    [newComponents setSecond:0]; 
    NSDate *newDate = [[NSCalendar currentCalendar] dateFromComponents:newComponents]; 

    NSLog(@" Date: %@", myCustomDate); 
    NSLog(@" Time: %@", myCustomTime); 
    NSLog(@"Combined: %@", newDate); 
}