How to change UIButton image in Swift

Question

I am trying to change the image of a UIButton using Swift    What should I do  This is OBJ-C code but I don t know with Swift    playButton setImage  UIImage imageNamed   play png   forState UIControlStateNormal

User · Answer

assume that this is your connected UIButton Name like    IBOutlet var btn refresh  UIButton    your can directly place your image in three modes      for normal state btn refresh setImage UIImage named   xxx png    forState  UIControlState Normal          for Highlighted state       btn refresh setImage UIImage named   yyy png    forState  UIControlState Highlighted              for Selected state          btn refresh setImage UIImage named   zzzz png    forState  UIControlState Selected    on your button action      MARK  button refresh action  IBAction func button refresh touchup inside sender  UIButton          if you set the image on same  UIButton     sender setImage UIImage named   newimage png    forState  UIControlState Normal         if you set the image on another  UIButton        youranotherbuttonName setImage UIImage named   newimage png    forState  UIControlState Normal

User · Answer

Swift 5  yourButton setImage UIImage named   BUTTON FILENAME png    for   normal

User · Answer

you can actually do this by highlighting the button and within the insepctor on the right hand tool bar you can update the image  obviously you can do it in code also as stated previously but this is another option for you

User · Answer

in swift 3 0    IBOutlet weak var selectionButton  UIButton   selectionButton setImage UIImage addBlueIcon  for   selected

User · Answer

From your Obc-C code I think you want to set an Image for button so try this way   let playButton    UIButton type   Custom  if let image   UIImage named   play png         playButton setImage image  forState   Normal      In Short   playButton setImage UIImage named   play png    forState  UIControlState Normal    For Swift 3   let playButton    UIButton type   custom  playButton setImage UIImage named   play png    for   normal

User · Answer

For anyone using Assets xcassets and Swift 3  it d be like this  no need for  png   let buttonDone    UIButton type   Custom   if let image   UIImage named   Done         self buttonDone setImage image  for   normal

User · Answer

Yes  even we can change image of UIButton  by using flag   class ViewController  UIViewController        IBOutlet var btnImage  UIButton      var flag   false      override func viewDidLoad                 super viewDidLoad              setting default image for button         setButtonImage                IBAction func btnClick   sender  Any                flag    flag         setButtonImage              func setButtonImage            let imgName   flag    share     image          let image1   UIImage named     imgName  png            self btnImage setImage image1  for   normal             Here  after every click your button image will change alternatively

User · Answer

I prefer the method of initializing my variables at the top first   let playButton UIButton  var image UIImage    and then setting them in viewDidLoad  override func viewDidLoad           playButton   UIButton type   Custom    imagePlay   UIImage named  play png     playButton setImage imagePlay  forState   Normal

User · Answer

Swift 5 and ensures the image scales to the size of the button but stays within the buttons bounds   yourButton clipsToBounds   true yourButton contentMode    scaleAspectFill     Use setBackgroundImage or setImage yourButton setBackgroundImage UIImage named   yourImage    for   normal

User · Answer

In Swift 4 2 and Xcode 10 1  Add image for selected UIButton  button addTarget self  action   selector self onclickDateCheckMark   for   touchUpInside   Target  button setImage UIImage init named   uncheck    for  UIControl State normal   When selected button setImage UIImage init named   check    for  UIControl State highlighted   When highlighted button setImage UIImage init named   check    for  UIControl State selected   When selected   But if you want to change selected button image you need to change it s selected state  Then only selected image will appear in your button    objc func onclickDateCheckMark sender UIButton        if sender isSelected    true           sender isSelected   false         print  not Selected        else           sender isSelected   true         print  Selected

User · Answer

As of swift 3 0  normal state has been removed you can use following to apply normal state   myButton setTitle  myTitle   for

User · Answer

in Swift 4   Xcode 9  example to turn picture of button to On or Off  btnRec    var bRec Bool   true   IBOutlet weak var btnRec  UIButton   IBAction func btnRec   sender  Any        bRec    bRec     if bRec           btnRec setImage UIImage named   MicOn png    for   normal        else           btnRec setImage UIImage named   MicOff png    for   normal

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