I have UIViewController which set top storyboard and having few subviews in storyboard. and I want to add a UIImageView programmatically and set it as a background view. so if I add a UIImageView, storyboard subviews are not visible.
how can I send this UIImageView behind all the storyboard subviews?
Thanks
You need to go with the sendSubviewToBack:
UIImageView *imgView = [[UIImageView alloc]initWithFrame:self.view.frame];
imgView.image = [UIImage imageNamed:#"blank-background.jpg"];
[self.view addSubview:imgView];
[self.view sendSubviewToBack:imgView];
use method of subview's "bringSubViewToFront".
like
[parentView bringSubViewToFront:subViewImg];
Related
I am trying to customise the navigation bar of my iPhone app. I want to add an image in the left side of the navigation bar title.
I tried the following code from the didFinishLaunchingWithOptions of the AppDelegate.m file:
UIView *myView = [[UIView alloc]initWithFrame:CGRectMake(170, 10, 20, 20)];
UIImageView *image = [[UIImageView alloc]initWithImage:[UIImage imageNamed:#"logo.png"]];
[myView addSubview:image];
[self.navigationController.navigationBar addSubview:myView];
self.navigationController.navigationItem.titleView=myView;
but it doesn't work. When I try it from the viewDidLoad of one of my ViewControllers it works. But i want to inherit this behaviour in all my ViewControllers
UINavigationItem has a property, titleView. You need to set that to your custom view, and then that view will replace the standard title (so you need to have your image and a label for the title in your custom view).
self.navigationItem.titleView = myView;
Im a beginner in programing iOS, so I have 2 questions:
1- I have a UIViewcontroller which load a few uiview and user is able to move them via touch. Now I want to put an image background in this way:
UIImageView *backgroundView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"board.png"]];
[self.view addSubview:backgroundView];
But the image covers over all uivews!!
2- As I said, I move my uiviews by touch and when they have collided in the end touch they both goes in a folder, and a folder is created. So I want to know how I can make that a special image shows on the created folder ??
if (view != toMove && CGRectContainsPoint(view.frame,toMove.center)) {
viewToBefolder = view;
}
You can add your background view first, and then the rest of the views you add will be on top, or just do this:
[self.view sendSubviewToBack:backgroundView];
If your image view is covering the the background, you should be setting the size and position of the image view, or setting the constraints so that it is added at the size and position that you want.
Set your imageview into the main window.
UIImageView *backgroundView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"background.png"]];
[self.window addSubview:backgroundView];
[self.window sendSubviewToBack:backgroundView];
Then set all your view controller view clear color. so, By default it's always display background image view into the all view.
I have a subview in my navigation bar. I try to add it by this way:
UIView *customView =
[[UIView alloc] initWithFrame:
CGRectMake(0, 0, image.size.width + label.frame.size.width, 44)];
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
[customView addSubview:imageView];
[customView addSubview:label];
[self.navigationController.navigationBar addSubview:customView];
However, when I try to push the navigation bar, the customView stays in the place, not animating following the sliding navigation bar. How can I achieve the animated subview? Is it even possible? Thanks!
you should not add subview in that way
you have tospecify your view location in the left , right or title view
self.navigationItem.titleView = YOURVIEW;
or choose another location left or right items in this way the the title view will added to the current view if you want to remove it just set it to nil in the place you want and reload it subviews again,
self.navigationItem.titleView = nil;
As you are using
[self.navigationController.navigationBar addSubview:customView];
that means the navigation bar you have create is in App delegate and is common for all the viewControllers in your project,that is why once you add a view on to it you see it on every view you have. Remove your sub-view in
-(void)viewWillDisappear:(BOOL)animated{
[Your subview remove fromSuperView];
[super viewWillDisappear:YES];
}
and add that subview in
-(void)viewWillAppear:(BOOL)animated{
[self.navigationController.navigationBar addSubview:Your subview];
[super viewWillAppear:YES];
}
this will add the subview in that particular view only and remove it as soon as that view is popped or pushed.The code given is not correct to the syntax please give a check on that.
I have a very simple UIViewController subclass. I've set an image view as its view. It takes the entire window.When I create a label and add it like this
UILabel *titleLabel=[self labelWithText:#"Some text"];
[self.imageView addSubview: titleLabel];
the label does not appear. But if I add it like this
[self.view addSubview: titleLabel];
it works, I see the label added to the view. A UIImageView is a subclass of UIView and it responds to the selector addSubview:. Then why does not this work?
I have a XIB file with UIControl and UIScrollView elements inside of it. I would like to add a background image to the view. I tried adding an ImageView in IB but I could not get it to be present as a background and it obscured the control elements. Sending a sendViewBack message doesn't seem to do anything either.
When I create a UIImageView programmatically, it doesn't show up.
Below is the code I attempted:
Programmatic Creation
UIImage *imageBackground = [UIImage imageWithContentsOfFile:#"globalbackground"];
UIImageView *backgroundView = [[UIImageView alloc] initWithImage:imageBackground];
[[self view] addSubview:backgroundView];
[[self view] sendSubviewToBack:backgroundView];
Dealing with the NIB file
[[self view] sendSubviewToBack:background];
where background is an IBOutlet declared in the header file and connected to the NIB's image view in IB.
Is there a step I'm missing here?
Set the frame and dont use sendSubviewToBack:. If you are working with UIImageViews you have to use [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"imageName.png"]];
UIImageView *backgroundView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"imageBackground"]];
backgroundView.frame = self.view.bounds;
[[self view] addSubview:backgroundView];
hope this was the deal.
Don't add the image view as a subview of the scroll view, it needs to be a separate view at the top level of the hierarchy, then sent to the back of the Z-order.
You will need to set the background of your scroll view to [UIColor clearColor], and ensure that the scroll view is not marked as opaque. You can do this in code or in interface builder.
Don't use imageWithContentsOfFile and then just pass it a filename with no extension (I'm assuming .png) - this is probably returning nil. Use imageNamed: instead (you don't supply an extension in that case, iOS4 and above)
Depending on the nature of your image, you can also generate a colour with it and use that as the background colour of your scroll view. I'm assuming self.view is the scroll view:
self.view.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:#"globalBackground"]];