Displaying image in a new view controllers UIImageView - ios

Question

I'll post my code first and then I'll explain the problem
RootViewController.h its called SpViewController.h
#import <UIKit/UIKit.h>
#import <MobileCoreServices/MobileCoreServices.h>
#import "secondViewController.h"
#interface spViewController : UIViewController
<UIImagePickerControllerDelegate,
UINavigationControllerDelegate>
#property BOOL newMedia;
#property (strong, nonatomic) IBOutlet UIImageView *imageView;
#property (strong, nonatomic) spViewController *secondViewController;
#property (strong, nonatomic) UIImageView *image;
#property (strong, nonatomic) UIImage *myImage;
- (IBAction)useCamera:(id)sender;
- (IBAction)useCameraRoll:(id)sender;
#end
spViewController.m
#import "spViewController.h"
#import "secondViewController.h"
#interface spViewController ()
#end
#implementation spViewController
- (IBAction)backtohome:(UIStoryboardSegue *)unwindSegue
{
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void) viewDidAppear:(BOOL)animated{
[super viewDidAppear:animated];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)useCamera:(id)sender {
if ([UIImagePickerController isSourceTypeAvailable:
UIImagePickerControllerSourceTypeCamera])
{
UIImagePickerController *imagePicker =
[[UIImagePickerController alloc] init];
imagePicker.delegate = self;
imagePicker.sourceType =
UIImagePickerControllerSourceTypeCamera;
imagePicker.mediaTypes = #[(NSString *) kUTTypeImage];
imagePicker.allowsEditing = NO;
[self presentViewController:imagePicker
animated:YES completion:nil];
_newMedia = YES;
}
}
- (IBAction)useCameraRoll:(id)sender {
if ([UIImagePickerController isSourceTypeAvailable:
UIImagePickerControllerSourceTypeSavedPhotosAlbum])
{
UIImagePickerController *imagePicker =
[[UIImagePickerController alloc] init];
imagePicker.delegate = self;
imagePicker.sourceType =
UIImagePickerControllerSourceTypePhotoLibrary;
imagePicker.mediaTypes = #[(NSString *) kUTTypeImage];
imagePicker.allowsEditing = NO;
[self presentViewController:imagePicker
animated:YES completion:nil];
_newMedia = NO;
}
}
//image picker delegate
-(void)imagePickerController:(UIImagePickerController *)picker
didFinishPickingMediaWithInfo:(NSDictionary *)info
{
UIImage *chosenImage = info[UIImagePickerControllerEditedImage]; self.myImage = chosenImage;
NSString *mediaType = info[UIImagePickerControllerMediaType];
[self performSelector:#selector(myMethod:) withObject:info afterDelay:0.1];
if ([mediaType isEqualToString:(NSString *)kUTTypeImage]) {
UIImage *image = info[UIImagePickerControllerOriginalImage];
_imageView.image = image;
if (_newMedia)
UIImageWriteToSavedPhotosAlbum(image,
self,
#selector(image:finishedSavingWithError:contextInfo:),
nil);
}
else if ([mediaType isEqualToString:(NSString *)kUTTypeMovie])
{
}
}
-(void)myMethod:(NSDictionary *)info {
[self dismissViewControllerAnimated:YES completion:^{
NSLog(#"Perform segue");
[self performSegueWithIdentifier:#"Picture Unwind Segue" sender:self];
}];
}
-(void)image:(UIImage *)image
finishedSavingWithError:(NSError *)error
contextInfo:(void *)contextInfo
{
if (error) {
UIAlertView *alert = [[UIAlertView alloc]
initWithTitle: #"Save failed"
message: #"Failed to save image"
delegate: nil
cancelButtonTitle:#"OK"
otherButtonTitles:nil];
[alert show];
}
}
//cancel delegate
-(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
[self dismissViewControllerAnimated:YES completion:nil];
}
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([[segue identifier]isEqualToString:#"Picture Unwind Segue"]) {
secondViewController *destinationViewController = [segue destinationViewController];
destinationViewController.imageView.image = self.myImage;
}
}
#end
secondViewController.h
#import <UIKit/UIKit.h>
#import <MobileCoreServices/MobileCoreServices.h>
#import "spViewController.h"
#interface secondViewController : UIViewController
<UIImagePickerControllerDelegate,
UINavigationControllerDelegate>
#property (strong, nonatomic) IBOutlet UIImageView *imageView;
#property (strong, nonatomic) UIImage *myImage;
#property (strong, nonatomic) UIImageView *image;
#end
secondViewController.m
#import "secondViewController.h"
#import "spViewController.h"
#interface secondViewController ()
#end
#implementation secondViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
self.imageView.image = self.myImage;
[super viewDidLoad];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
#end
So the problem I'm having is, I can't get the image that has just been selected in the UIImagePickerController to be displayed in the UIImageView, my ImagePickerController was initiated by a button in my previous view controller "spViewController" (rootViewController) I am using Storyboards, I thought if I put in the UIImageView then connected it using an outlet reference it would display there, this doesn't seem to be the case though. If I put the UIImageView in the first view controller and do the same it will display the image but thats not where I want it to go.
Thank you for any help

Answer 1

To fix my problem i decided to save the image and call on it later heres the code i put into my secondViewController.m
{NSString *docsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
NSString *filepathJPG = [docsPath stringByAppendingPathComponent:#"imagefile.jpg"];
UIImage *img = [UIImage imageWithContentsOfFile: filepathJPG];
if (img != nil) {
// assign the image to the imageview,
_imageView.image = img;
// Optionally adjust the size
BOOL adjustToSmallSize = YES;
CGRect smallSize = (CGRect){0,0,100,100};
if (adjustToSmallSize) {
_imageView.bounds = smallSize;
}
}
I hope this can help others that have the same problem.

Answer 2

So according to your code , you are setting the property of myImage which is an instance of UIImage from the RootViewController.
so your just passing the data of the image , But your not setting your imageView.image property to the passed image value.
So a possible fix would be to set
imageView.image = myImage in viewDidLoad
or
you can directly access the imageView property from the perform prepare for segue method in the RootViewController and set its image property.
I hope this helps .
Cheers

Answer 3

You can declare a property in AppDelegate class and access it across all controllers using appdelegate shared instance