Tap on a cell to scroll up a keyboard.
Correct the spelling and then press the
return
key.
main.mCorrectAppDelegateTableViewController
When a cell is selected,
the
tableView:didDeselectRowAtIndexPath:
method of the
table
view delegate
is called.
This method
adds a
UITextField
to the cell,
temporarily covering the cell’s
textLabel.
The position, content, and color (fore and background) of the
UITextField
exactly match those of the
textLabel.
When you press
return,
the
UITextField’s
text will be copied into the cell
and the
UITextField
will be destroyed.
Minor details.
A cell turns blue when it is selected.
This makes it hard to see the vertical blue insertion point,
so we call
deselectRowAtIndexPath:animated:
to fade the blue back to white.
A
UILabel
displays its text centered vertically.
A
UITextField
displays its text upper-left justified.
(Try to find this in the documentation!)
That’s why we needed the variable
dy.
We change the
textLabel’s
text to a blank just in case the background color is
clear.
I would have preferred to change the cell’s text to the null string
@"",
or to
nil,
but then the edited text never appeared in the cell
after the user pressed return.
Why?
Three methods of the data source provide the data: