How can I change the image displayed in a UIImageView programmatically

Question

I have an IBOutlet to a UIImageView  but when I look at the UIImageView doc  I can t see any hints about programmatically changing it  Do I have to fetch an UIImage object from that UIImageView

User · Answer

For the purpose of people who may be googling this to try to solve their problem, remember to properly declare the property in your header file and to synthesize the UIImageView in your implementation file... It'll be tough to set the image programmatically without getter and setter methods.

#import <UIKit/UIKit.h>

@interface YOURCONTROLLERNAME : UIViewController {
    IBOutlet UIImageView *imageToDisplay;
}

@property (nonatomic, retain) IBOutlet UIImageView *imageToDisplay;

@end

and then in your .m :

@implementation YOURCONTROLLERNAME

@synthesize imageToDisplay;
//etc, rest of code goes here

From there you should be fine using something like the following to set your image.

[YOURCONTROLLER.imageToDisplay setImage:[UIImage imageNamed:value]];

User · Answer

If you have an IBOutlet to a UIImageView already  then all you have to do is grab an image and call setImage on the receiver  UIImageView   Two examples of grabbing an image are below  One from the Web  and one you add to your Resources folder in Xcode   UIImage  image     UIImage alloc  initWithData  NSData dataWithContentsOfURL  NSURL URLWithString   http   farm4 static flickr com 3092 2915896504 a88b69c9de jpg        or  UIImage  image    UIImage imageNamed    cell png      Once you have an Image you can then set UIImageView    imageView setImage image     The line above assumes imageView is your IBOutlet   That s it  If you want to get fancy you can add the image to an UIView and then add transitions    P S  Memory management not included

User · Answer

Don t forget to call sizeToFit   after you change image if you then use size of UIImageView to set UIScrollView contentSize and or compute zoom scale  let image   UIImage named   testImage   imageView image   image imageView sizeToFit   scrollView contentSize   imageView bounds size

User · Answer

My problem was that I tried to change the image in an other thread  I did like this   -  void changeImage       backgroundImage image    UIImage imageNamed   img png        Call with    self performSelectorOnMainThread    selector changeImage  withObject nil waitUntilDone NO

User · Answer

Working with Swift 5  XCode 10 3  it s just  yourImageView image   UIImage named   nameOfTheImage

User · Answer

UIColor   background     UIColor alloc  initWithPatternImage       UIImage imageNamed   anImage png      self view backgroundColor   background   background release

User · Answer

Note that the NIB file doesn t wire up all the IBOutlets until the view has been added to the scene   If you re wiring things up manually  which you might be doing if things are in separate NIBs  this is important to keep in mind   So if my test view controller has an  imageView  wired by a nib  this probably won t work     testCardViewController imageView image    UIImage imageNamed   EmptyCard png       self view addSubview testCardViewController view     But this will      self view addSubview testCardViewController view     testCardViewController imageView image    UIImage imageNamed   EmptyCard png

User · Answer

myUIImageview image   UIImage  named  myImage png

User · Answer

Following Jordan s advice  which should work actually   try to set the UIImageView to be visible        imageView setHidden  NO     and also - don t forget to attach it to the main UIView     mainView addSubview  imageView     and to bring to the front     mainView bringSubviewToFront  imageView     Hope combining all these steps will help you solve the mystery

User · Answer

To set image on your imageView use below line of code   self imgObj image  UIImage imageNamed   yourImage png

User · Answer

Example in Swift   import UIKit  class ViewController  UIViewController         IBOutlet var myUIImageView  UIImageView       override func viewDidLoad             super viewDidLoad               IBAction func myAction sender  UIButton            let newImg  UIImage    UIImage named   profile-picture-name           self myUIImageView image   newImg             IBAction func myAction2 sender  UIButton            self myUIImageView image   nil         self myUIImageView image   UIImage data  NSData contentsOfURL  NSURL string   http   url image png

User · Answer

If you want to set image to UIImageView programmatically then Dont Forget to add UIImageView  as SubView to the main View   And also dont forgot  to set ImageView Frame   here is the code  UIImageView  myImage     UIImageView alloc  initWithFrame CGRectMake 0  0  320  460     myImage image    UIImage imageNamed   myImage png      self view addSubview myImage

User · Answer

imageView image    UIImage imageNamed   myImage png

User · Answer

This worked for me   ImageViewName setImage  UIImage imageNamed    ImageName png       Make sure that the ImageView is declared properly in the  h file and is linked with the IB element

User · Answer

This question already had a lot of answers  Unfortunately none worked for me   So for the sake of completenes I add what helped me   I had multiple images with the same name - so I ordered them in sub folders  And I had the full path to the image file I wanted to show  With a full path imageNamed   as used in all solutions above  did not work and was the wrong method    Instead I now use imageWithContentsOfFile  like so   self myUIImage image    UIImage imageWithContentsOfFile  currentWord imageFileName     Don t know  if anyone reads that far   If so and this one helped you  please vote up   -

[ios] How can I change the image displayed in a UIImageView programmatically?

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