Transferring UIImage from one class to another

Question

I want to take a UIImage from one class (pulled from a server) and use it in a separate class (different View Controller).

UIImage *image = [UIImage imageWithData:imageData];

This is my current code in the SecondViewController. How can I get it so that I can use the UIImage image in my FirstViewController? Thanks!

@nhgrif They are related by being in the same app I suppose? — Flinders Flanders, Feb 01 '14 at 03:09
Lemme guess -- pass a pointer to it to the other controller? — Hot Licks, Feb 01 '14 at 03:15
Try using NSNotification and passing the image as the object — Tha Leang, Feb 01 '14 at 03:20
See this section of my book on how to arrange for two instances to see each other: http://www.apeth.com/iOSBook/ch13.html#_visibility_by_instantiation And this section on how to pass data when one vc instantiates another vc: http://www.apeth.com/iOSBook/ch19.html#_presented_view_controller — matt, Feb 01 '14 at 03:37

score 0 · Answer 1 · edited Jun 20 '20 at 09:12

0

Its very simple... Try NSUserDefaults concept here. You can get UIImage in any view controller of the app if once stored in NSUserDefaults.

Step 1: For Storing

Image Save on NSUserDefaults in second view controller

  [[NSUserDefaults standardUserDefaults] setObject:UIImagePNGRepresentation(image) forKey:@"image"];

Step 2: For Retrieving

Image retrieve on NSUserDefaults in first view controller:

NSData* imageData = [[NSUserDefaults standardUserDefaults] objectForKey:@"image"];
UIImage* image = [UIImage imageWithData:imageData];

edited Jun 20 '20 at 09:12

Community

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answered Feb 01 '14 at 03:40

Rajesh Loganathan

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While this works, NSUserDefaults should not be used in this type of scenario. – user523234 Feb 01 '14 at 05:12

score 0 · Answer 2 · answered Feb 01 '14 at 05:18

If you are using .xib to navigate from one ViewController to another then this code might help you.

Suppose you have image in you FirstViewController

UIImage *image = [UIImage imageWithData:imageData];

//------Time to go at another Class lets call it secondViewController

secondViewController *secondview =[[secondViewController alloc] initWithNibName:@"secondViewController" bundle:nil WithImage:image];
[self.navigationController pushViewController:secondview animated:YES];

SecondViewController.h

@interface secondViewController : UIViewController

@property (nonatomic,strong)UIImage *imagefromServer;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil WithImage:(UIImage *)image;

@end

SecondViewController.m

 - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil WithImage:(UIImage *)image
  {
       self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
       if (self) {
       // Custom initialization
       imagefromServer= image;
       }
   return self;
  }

Hope helps you

Transferring UIImage from one class to another

2 Answers2