Custom UIView doesnt show - ios

Question

I have very simple UIView that creating the box, but what is happen is the UIView does not show at all, here is my code on sharingButtons.m
-(void)createContainer{
winWidth = [UIScreen mainScreen].bounds.size.width;
buttonContainer = [[UIView alloc] initWithFrame:CGRectMake(0, 0, winWidth, 20)];
buttonContainer.backgroundColor = [UIColor redColor];
[self.view addSubview:buttonContainer];
}
-(void)createButton{
[self createContainer];
}
and here is my sharingButtons.h
#interface SocialSharing : UIViewController {
int winWidth;
}
- (void)createButton;
- (void)createContainer;
#pragma mark - Properties
#property(nonatomic, strong) UIView* buttonContainer;
#end
And createButton method is called from MyViewControler.m on viewDidLoad
Is any wrong with my code??
EDITED
Here is my code on MyViewControler.m
- (void)loadSocialSharingButton {
socialButtons = [[SocialSharing alloc] init];
[socialButtons createButton];
}
- (void)viewDidLoad {
[super viewDidLoad];
[self loadSocialSharingButton];
}
Sorry I just learn about obj c :)
Thanks a lot

Answer 1

The reason your buttonContainer is not visible is, it is not loaded in your view hierarchy.
To make it visible you should add it as subview. In MyViewController.m in viewDidLoad add the following line after [self loadSocialSharingButton];
[self.view addSubview:socialButtons.buttonContainer];
Hope this Helps!

Answer 2

Your SocialSharing is subclass of UIViewController.
And you add your buttonContainer view to this SocialSharing Controller,this controller is not on screen if you just call
socialButtons = [[SocialSharing alloc] init];
[socialButtons createButton];
So,you can not see anything.

Answer 3

In an iOS App, only one ViewController at a time is active. And as you are at MyViewController, so MyViewController is active, if you want to navigate to any other view controller than you need to present or push the instance of same. Doing so will make the other view controller as active.
In your case the problem is your SocialSharing is a subclass of UIViewController as it is created as SocialSharing : UIViewController and it's not active, so adding any view over it won't be visible as the instance of SocialSharing is not pushed/ presented. If you need to show the view from SocialSharing than either you subclass it from UIView or push/ present the instance of SocialSharing to make it's view active and visible.

Answer 4

You are currently # MyViewController and But you are loading your custom view # SocialSharing ViewController, Both ViewController are distinct and you can't just get your custom view at social sharing to MyViewController by initializing it.
You have change SocialSharing class as sub class of UIView and initialize this view and add to subview of MyViewController.
SocialSharing.h
#interface SocialSharing : UIView {
int winWidth;
}
- (instancetype)createButton;
#pragma mark - Properties
#property(nonatomic, strong) UIView* buttonContainer;
#end
SocialSharing.m
- (instancetype)createButton
{
winWidth = [UIScreen mainScreen].bounds.size.width;
self = [super initWithFrame:CGRectMake(0, 0, winWidth, 20)];
if (self) {
buttonContainer = [[UIView alloc] initWithFrame:];
buttonContainer.backgroundColor = [UIColor redColor];
[self addSubview:buttonContainer];
}
return self;
}
MyViewController.m
- (void)viewDidLoad {
[super viewDidLoad];
[self loadSocialSharingButton];
}
- (void)loadSocialSharingButton {
socialButtons = [SocialSharing alloc] createButton];
[self.view addSubView:socialButtons];
}