Trouble setting UIImageView.image on custom class from another class - ios

Question

I have a custom class A that is a subclass of UIView which essentially manages a UIScrollView that fits the size of the view and the contains an UIImageView that fills that scrollView.
I am having trouble setting the imageView.image of the custom class:
Here's the class
#import "BackgroundPickerView.h"
#implementation BackgroundPickerView
#synthesize scrollView;
#synthesize imageView;
#synthesize actionButton;
-(id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
return self;
}
-(void)layoutSubviews
{
[super layoutSubviews];
//[[NSNotificationCenter defaultCenter] addObserver:self
// selector:#selector(changeImage)
// name:#"ImageChangeNotification"
// object:nil];
//Here's where we add custom subviews
scrollView = [[UIScrollView alloc] init];
imageView = [[UIImageView alloc] init];
actionButton = [[UIButton alloc] init];
[scrollView setFrame:CGRectMake(0, 0, 321, 115)];
[imageView setFrame:CGRectMake(0, 0, 321, 115)];
[actionButton setFrame:CGRectMake(0, 0, 320, 115)];
scrollView.scrollEnabled = YES;
scrollView.minimumZoomScale = 1.0;
scrollView.maximumZoomScale = 6.0;
scrollView.contentSize = CGSizeMake(300, 200);//imageView.image.size;
[scrollView addSubview:imageView];
[self addSubview:scrollView];
}
-(void)storeImage:(UIImage *)image
{
self.imageView.image = image;
}
-(void)changeImage
{
[self.imageView setImage:[UIImage imageNamed:#"random.png"]];
}
From my other class B where I receive the image I have tried using NSNotification and a simple setter method to try setting the imageView property of the class object, but cannot seem to set the imageView.image. I have tried using
instance.imageView.image = myImageToSet
//Setter
[instance storeImage:myImageToSet];
in class B but am having no success

Answer 1

first of all, the initialisation of subviews in layoutSubviews not the best way, better u initialise them in the init method, because layoutSubviews may call multiple times to layout the subviews, if u place the initialisation code in the layoutSubviews there might be may subviews. in layoutSubviews u only set the frame of the subviews.
and u can do like below,
#import "BackgroundPickerView.h"
#implementation CustomViewA
//Edit change below
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if(self)
{
[self commonInit];
}
return self;
}
- (void)awakeFromNib
{
[self commonInit];
}
- (void)commonInit
{
_scrollView = [[UIScrollView alloc] init];
_imageView = [[UIImageView alloc] init];
_actionButton = [[UIButton alloc] init];
_scrollView.scrollEnabled = YES;
_scrollView.minimumZoomScale = 1.0;
_scrollView.maximumZoomScale = 6.0;
[_scrollView addSubview:_imageView];
[self addSubview:_scrollView];
}
- (void)layoutSubviews
{
[super layoutSubviews];
[_scrollView setFrame:CGRectMake(0, 0, 321, 115)];
[_imageView setFrame:CGRectMake(0, 0, 321, 115)];
[_actionButton setFrame:CGRectMake(0, 0, 320, 115)];
_scrollView.contentSize = CGSizeMake(300, 200);
}
-(void)storeImage:(UIImage *)image
{
self.imageView.image = image;
}
-(void)changeImage
{
[self.imageView setImage:[UIImage imageNamed:#"random.png"]];
}
synthesise is optional
and in BackgroundPickerView.h file it is something like below
#interface BackgroundPickerView : UIView
#property (nonatomic, strong) UIScrollView *scrollView;
#property (nonatomic, strong) UIImageView *imageView;
#property (nonatomic, strong) UIButton *actionButton;
-(void)storeImage:(UIImage *)image;
-(void)changeImage;
for image u check it it should work, check the image is present or not,
Edit
For the image, in controller for example,
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
_viewA = [[BackgroundPickerView alloc] initWithFrame:self.view.bounds];
[self.view addSubview:_viewA];
}
//for testing
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
[_viewA storeImage:[UIImage imageNamed:#"6.png"]]; //hear do this
}