CODEWITHSUNDEEP
iosobjective-cuiimagepushviewcontroller
David
David

Reputation: 69

OBJECTIVE-C: PushViewController with UIImage doesn't work

I'm trying to pass a UIImage from a First View Controller to Second View Controller, but this doesn't appear in Second View. Why?

My code in FirstController.m:

SecondController *second = (SecondController *)[self.storyboard instantiateViewControllerWithIdentifier:@"SBSecondController"];

second.imgCard.image = [UIImage imageNamed:@"image.png"];

[self.navigationController pushViewController:second animated:YES];

My code in SecondController.h:

@property (nonatomic, strong) IBOutlet UIImageView *imgCard;

My code in SecondController.m:

@implementation SecondController 

@synthesize imgCard;

Upvotes: 0

Views: 97

Answers (3)

jrturton
jrturton

Reputation: 119252

imgCard will be nil until the second view controller's view has been loaded. This doesn't happen until you push the view controller. A view controller's view isn't created, and the outlets aren't connected, until needed.

You have two options.

  • Set the image view's image after the pushViewController call (not sure if that will cause a visual glitch)
  • Add an image property to SecondController and set that. In viewDidLoad of SecondController, set imgCard.image = self.image;.

Upvotes: 2

Subhash Sharma
Subhash Sharma

Reputation: 745

If image that you want to set on your ImageView is in your Assets.xcassets or in your project folder ,than you don't need to pass image in prapare for sague just use as below;

imgCard.image = [UIImage imageNamed:@"image.png"];

in FirstController.m:

SecondController *second= (SecondController*)[self.storyboard instantiateViewControllerWithIdentifier:@"SBSecondController"];

second.imageVar = [UIImage imageNamed:@"image.png"];

[self.navigationController pushViewController:second animated:YES];

in SecondController.h:

@property (nonatomic, strong) IBOutlet UIImageView *imgCard;
@property   UIImage *imageVar;

in SecondController.m:

@implementation SecondController 

@synthesize imageVar,imgCard;

-(void)viewDidLoad{
[super viewDidLoad];
 imagCard.image = imageVar;
}

Upvotes: 3

stefos
stefos

Reputation: 1235

Your first line of code is wrong. The correct way to init your second view controller is :

SecondController *second = (SecondController*)[self.storyboard instantiateViewControllerWithIdentifier:@"SBSecondController"];
second.imgCard.image = [UIImage imageNamed:@"image.png"];
...

Upvotes: 1

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