In a nutshell:

When the title of a back-button of a navigation controller gets changed, in some cases the old title is stuck and the new title will not be displayed. This happens only in some reproduceable situations, while it works as designed in other situations.

It depends on the hardware

  • The error happens on iPhone 3G (iOS 4.2.1) and in the simulator (iOS 5.1)
  • With identical sourcecode there is no error on iPhone 4 (iOS 5.1)

It depends on the word that is written to the title

  • When the button is created, and it gets from my selfwritten creating-method the same word as title that it would have got automatically (i.e. the title of the previous page on the navigation controller's stack), and when the other circumstances match, then, when trying to change the button's title at a later moment, the old text is stuck and the new title will not show up.
  • When at creation time the button gets a word as title that is different from its default-title, then every later changes of its title works fine, as long as you don't assign the default-title to it.
  • If, after a lot of successfull changes with many different titles, you put the word on the buttons title, that was its default title, then this word is stuck. Later changes will not be accepted (without any message, and only if the other circumstances match)

It depends on whether the button was invisible in the meantime or not.

  • If another view was pushed on the navigation controllers stack, so that the old page with the flawed button became hidden by the new page, and when the new page was popped from the stack later again which makes the button visible again, (and when the other circumstances match) then the old text was stuck and the trial to change it is ignored (without any message).
  • If the button was newer hidden, changing its title never
iphone ios ios-simulator
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