如何使用视图顶部的工具栏滚动表视图

Question

I have a view with a toolbar at the top and a table view with text fields in it's cells. When I want to edit the text fields placed in the bottom of the table view the keyboard is hiding the text field being edited (as the table view is not scrolled up). I tried to implement http://cocoawithlove.com/2008/10/sliding-uitextfields-around-to-avoid.html but this makes my whole view move up (the toolbar and the table view) while I would like to have the toobar at the top of the view for the whole time. I modified the mentioned code to something like this:

- (void)textFieldDidBeginEditing:(UITextField *)textField {

CGRect textFieldRect = [tableView.window convertRect:textField.bounds fromView:textField];
CGRect viewRect = [tableView.window convertRect:tmpTableView.bounds fromView:tableView];

CGFloat midline = textFieldRect.origin.y + 0.5 * textFieldRect.size.height;
CGFloat numerator = midline - viewRect.origin.y - MINIMUM_SCROLL_FRACTION * viewRect.size.height;
CGFloat denominator = (MAXIMUM_SCROLL_FRACTION - MINIMUM_SCROLL_FRACTION) * viewRect.size.height;
CGFloat heightFraction = numerator / denominator;

if (heightFraction < 0.0)  {
    heightFraction = 0.0;
} else if (heightFraction > 1.0) {
    heightFraction = 1.0;
}

UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
if (orientation == UIInterfaceOrientationPortrait || orientation == UIInterfaceOrientationPortraitUpsideDown) {
    animatedDistance = floor(PORTRAIT_KEYBOARD_HEIGHT * heightFraction);
} else  {
    animatedDistance = floor(LANDSCAPE_KEYBOARD_HEIGHT * heightFraction);
}

CGRect viewFrame = tableView.frame;
viewFrame.origin.y -= animatedDistance;

[UIView beginAnimations:nil context:NULL];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationDuration:KEYBOARD_ANIMATION_DURATION];

[tableView setFrame:viewFrame];

[UIView commitAnimations];


}

and

- (void)textFieldDidEndEditing:(UITextField *)textField {
CGRect viewFrame = tableView.frame;
viewFrame.origin.y += animatedDistance;

[UIView beginAnimations:nil context:NULL];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationDuration:KEYBOARD_ANIMATION_DURATION];

[tableView setFrame:viewFrame];

[UIView commitAnimations];
}

This made my toolbar stay at the top, but unfortunately the table view overlays the toolbar and the toolbar is not visible.

Any ideas how to solve this?

Answer 1

与其重新放置表格视图，不如重新调整表格视图的大小，以使键盘不与之重叠。