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is it possible to update UIButton title/text programmatically?

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By User


I have a UIButton , that when pressed, brings up a new view where the user can change some settings. When the view is dismissed, I'd like to update the title/text of the UIButton to reflect the new state. I'm calling: 





[myButton setTitle: @"myTitle" forState: UIControlStateNormal];

[myButton setTitle: @"myTitle" forState: UIControlStateApplication];

[myButton setTitle: @"myTitle" forState: UIControlStateHighlighted];

[myButton setTitle: @"myTitle" forState: UIControlStateReserved];

[myButton setTitle: @"myTitle" forState: UIControlStateSelected];

[myButton setTitle: @"myTitle" forState: UIControlStateDisabled];


But it never seems to change from the original text/title as specified in IB.


Source: Tips4all, CCNA FINAL EXAM
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Comments

  1. UserMay 23, 2012 at 9:53 AM

    Do you have the button specified as an IBOutlet in your view controller class, and is it connected properly as an outlet in Interface Builder (ctrl drag from new referencing outlet to file owner and select your UIButton object)? That's usually the problem I have when I see these symptoms.

    ReplyDelete
  2. UserMay 23, 2012 at 9:53 AM

    I solved the problem just setting the title parameter for UIControlStateNormal, and its automatically works on the other states. The problem seems to be when you set another UIcontroState.

    [myButton setTitle: @"myTitle" forState: UIControlStateNormal];

    ReplyDelete
  3. UserMay 23, 2012 at 9:53 AM

    Even though Caffeine Coma's issue was resolved, I would like to offer another potential cause for the title not showing up on a UIButton.

    If you set an image for the UIButton using

    - (void)setImage:(UIImage *)image forState:(UIControlState)state


    It can cover the title. I found this out the hard way and imagine some of you end up reading this page for the same reason.

    Use this method instead

    - (void)setBackgroundImage:(UIImage *)image forState:(UIControlState)state


    for the button image and the title will not be affected.

    I tested this with programmatically created buttons and buttons created in a .xib

    ReplyDelete
  4. UserMay 23, 2012 at 9:53 AM

    I discovered another problem. It may be a bug introduced in iOS 5, but I thought I'd point it out for anyone else who encounters it.

    If you don't set any default text for the button in the XIB, no text will ever appear if you set it programmatically. And if you do set text in the XIB, any text you subsequently assign to the button programmatically will be truncated to the size of the default text.

    And finally, if you're showing the view with your button and then invoke another view (like an ActionSheet) and then dismiss it, the text that you assigned to the button programmatically will be erased and the button caption will return to whatever you set up in the XIB.

    ReplyDelete

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