is it possible to update UIButton title text programmatically

Question

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

User · Answer

One more possible cause is this   If you attempt to set the button s title in the  id initWithNibName      method  then you re button property will still be nil   It hasn t yet been assigned to the UIButton     You must be sure that you re setting your buttons in a method like  void viewWillLoad or  void viewWillAppear  but you probably don t want to set them as late as  void viewDidAppear

User · Answer

As of Swift 4       button setTitle  Click   for   normal

User · Answer

for swift    button setTitle  Swift   forState  UIControlState Normal

User · Answer

funroll is absolutely right  Here you can see what you will need Make sure function runs on main thread only  If you do not want deal with threads you can do like this for example  create NSUserDefaults and in ViewDidLoad cheking condition was pressed button in another View or not  in another View set in NSUserDefaults needed information  and depending on the conditions set needed title for your UIButton  so  yourButton setTitle    Title  forState  UIControlStateNormal

User · Answer

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

User · Answer

I kept having problems with this  the only solution was to add an image and label as subviews to the uibutton  Then I discovered that the main problem was that I was using a UIButton with title  Attributed  When I changed it to Plain  just setting the titleLabel text did the trick

User · Answer

Make sure you re on the main thread   If not  it will still save the button text  It will be there when you inspect the object in the debugger  But it won t actually update the view

User · Answer

Turns out the docs tell you the answer  The UIButton will ignore the title change if it already has an Attributed String to use  with seems to be the default you get when using Xcode interface builder    I used the following    self loginButton       setAttributedTitle   NSAttributedString alloc  initWithString   Error      attributes nil        forState UIControlStateDisabled    self loginButton setEnabled NO

User · Answer

Sometimes it can get really complicated  The easy way is to  refresh  the button view      Do stuff to your button here   For example    mybutton setEnabled YES      Refresh it to new state    mybutton setNeedsDisplay

User · Answer

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

User · Answer

I solved the problem just setting the title parameter for UIControlStateNormal  and it automatically works on the other states  The problem seems to be when you set another UIControlState    myButton setTitle    myTitle  forState  UIControlStateNormal

User · Answer

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     Edit  While it s not the case here  something like this can also happen if you set an attributed title to the button  then you try to change the title and not the attributed title

[ios] is it possible to update UIButton title/text programmatically?

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