UIDatePicker will not show after UITableViewCell select

i am using the Code example from Apple, to display a UIDatePicker when a specific UITableViewCell is selected.

how can i change this behavior?

My Code:

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath 开发者_JAVA百科*)indexPath
{

[tableView deselectRowAtIndexPath:indexPath animated:YES];

if(indexPath.section == 5) {
    //Date Picker
    UITableViewCell *targetCell = [tableView cellForRowAtIndexPath:indexPath];
    self.pickerView.date = [self.dateFormatter dateFromString:targetCell.textLabel.text];
    if (self.pickerView.superview == nil)
    {
        [self.view.window addSubview: self.pickerView];

        // size up the picker view to our screen and compute the start/end frame origin for our slide up animation
        //
        // compute the start frame
        CGRect screenRect = [[UIScreen mainScreen] applicationFrame];
        CGSize pickerSize = [self.pickerView sizeThatFits:CGSizeZero];
        CGRect startRect = CGRectMake(0.0,
                                      screenRect.origin.y + screenRect.size.height,
                                      pickerSize.width, pickerSize.height);
        self.pickerView.frame = startRect;

        // compute the end frame
        CGRect pickerRect = CGRectMake(0.0,
                                       screenRect.origin.y + screenRect.size.height - pickerSize.height,
                                       pickerSize.width,
                                       pickerSize.height);
        // start the slide up animation
        [UIView beginAnimations:nil context:NULL];
        [UIView setAnimationDuration:0.3];

        // we need to perform some post operations after the animation is complete
        [UIView setAnimationDelegate:self];

        self.pickerView.frame = pickerRect;

        // shrink the table vertical size to make room for the date picker
        CGRect newFrame = self.tableView.frame;
        newFrame.size.height -= self.pickerView.frame.size.height;
        self.tableView.frame = newFrame;
        [UIView commitAnimations];

    }

}


}

Assuming the code you've provided is of your detail ViewController, you don't need to set the frame for pickerRect. Just need to tell the app that when the orientation changes, the pickerView should rotate with it, as follows

self.picker.autoresizingMask = UIViewAutoresizingFlexibleWidth |
UIViewAutoresizingFlexibleTopMargin;

You can force the size of picker view by setting its frame, as you've done. Since you are working with a UISplitViewController, the pickerView needs to be a subView of your detail ViewController, NOT self.view.window. Also, go through the sample provided at this link to see what other mistakes you were making.

What I see from the given picture, is that you are trying to slide the UIPickerView from the bottom of the screen upwards.

If so, then I think you are not setting frames as you should be.

As shown in View and Window Architecture, the origin of coordinate system is upper left corner.

I whould do something like this:

CGRect pickerFrame = pickerView.frame;
pickerFrame.origin.x = leftTableViewWidth;
pickerFrame.origin.y = screenFrame.size.height + pickerFrame.size.height;
pickerView.frame = pickerFrame;
// begin animation here
pickerFrame.origin.y += pickerFrame.size.height;
// commit animation