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copied!<p>Here's animation code, that I use:</p> <pre><code>- (void)animateDatePicker:(BOOL)show { CGRect screenRect = self.frame; CGSize pickerSize = [self.datePickerView sizeThatFits:CGSizeZero]; CGRect startRect = CGRectMake(0.0, screenRect.origin.y + screenRect.size.height, pickerSize.width, pickerSize.height); CGRect pickerRect = CGRectMake(0.0, screenRect.origin.y + screenRect.size.height - pickerSize.height, pickerSize.width, pickerSize.height); self.datePickerView.frame = pickerRect; self.backgroundColor = UIColorMakeRGBA( 64, 64, 64, 0.7f - (int)show * 0.7f ); if ( show ) { self.datePickerView.frame = startRect; [self.parentViewController addSubviewToWindow:self]; } [UIView beginAnimations:nil context:nil]; [UIView setAnimationDuration:0.3f]; [UIView setAnimationDelegate:self]; self.backgroundColor = UIColorMakeRGBA( 64, 64, 64, 0.0f + (int)show * 0.7f ); if ( show ) { self.datePickerView.frame = pickerRect; } else { [UIView setAnimationDidStopSelector:@selector(slideDownDidStop)]; self.datePickerView.frame = startRect; } [UIView commitAnimations]; } </code></pre> <p>datePickerView is a view, that contains DatePicker:</p> <pre><code>self.datePickerView = [[UIView alloc] initWithFrame:CGRectMake(0.0, 174.0, 320.0, 286.0)]; self.datePicker = [[UIDatePicker alloc] initWithFrame:CGRectMake(0.0, 70.0, 320.0, 216.0)]; [self.datePicker setDatePickerMode:UIDatePickerModeDate]; [self.datePicker addTarget:self action:@selector(pickerValueChanged:) forControlEvents:UIControlEventValueChanged]; [self.datePickerView addSubview:self.datePicker]; </code></pre> <p>parentViewController should implement addSubviewToWindow method:</p> <pre><code>- (void)addSubviewToWindow:(UIView *)addView { [self.view addSubview:addView]; } </code></pre> <p>UIColorMakeRGBA:</p> <pre><code>#define UIColorMakeRGBA(nRed, nGreen, nBlue, nAlpha) [UIColor colorWithRed:(nRed)/255.0f green:(nGreen)/255.0f blue:(nBlue)/255.0f alpha:nAlpha] </code></pre> <p>slideDownDidStop is a method, that will be called after datePicker slide down successfully.</p> <p>So, just to summarize - you have MyViewController, that have </p> <pre><code>MyDatePickerView *myDatePicker; </code></pre> <p>field.</p> <p>MyDatePickerView is a custom class, that have UIDatePicker *datePicker field, MyViewController *parentViewController and animateDatePicker method.</p> <p>When you perform some action on MyViewController (for example, UIControlEventTouchUpInside for some button), you should invoke </p> <pre><code>[myDatePicker animateDatePicker:YES]; </code></pre> <p>Please let me know if you have questions.</p> <p><strong>UPDATE:</strong> Here's a small <a href="http://89.112.8.39/so/DatePickerTest.zip" rel="nofollow noreferrer">example</a>.</p>

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