Is there any way that I can add uiview as a subview over a view controller using UIStoryboard, using xib's we can do that, but i'm unable do that using storyboard.
My storyboard is not holding any of the uiview as a subview when I drag and drop on it, it was placing under the view controller.
Is there any way that I can add it programmatically on my view controller using storyboard.? I'm stuck please help me out
Am I right, you want to hold UIView in storyboards without view controller or superview ?
You can't do that. You should use XIBs to hold custom views.
It doesn't matter you add it programmatically or via drag and drop, in storyboards you can't hold "isolated" views, every view must have a superview and therefore a UIViewController.
Check apple's guide, make sure you understand UIViewController,UIView,UIStoryboard classes and relations between them. Also this.
Hope it helped.
Yes, you can override UIViewController's loadView method to do it as i have written code below.
Because loadView is the method which is called first of all other viewController's loading methods. So you can set it here.
Hope this will work for you as I have tested it on my code.
- (void)loadView {
self.view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, [UIScreen mainScreen].bounds.size.height)];
self.view.backgroundColor = [UIColor blackColor];
// enter your customization code here
}
write this line in function
-(void) ViewDidLoad:
[self.view addSubView:...];
Related
I set an image like this to my view:
self.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:#"map3.jpg"]];
Right now I have it in a button action method. But how do I make it set directly when the app is launched?
If you want to set the backgroundColor of a UIViewController's view, then move your code into viewDidLoad and adapt likewise:
self.view.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:#"map3.jpg"]];
A UIViewController doesn't have a backgroundColor directly, but its view does, like any other UIView.
One way is to put that logic within your view controller's -viewDidLoad method for the UIImageView property.
UIView
If you are in a UIView class place the code in either initWithFrame: or initWithCoder:
initWithFrame gets called when you instantiate the view from code (e.g. UIView *myView = [[UIView alloc] initWithFrame:CGRectZero];
initWithCoder: gets called whenever the UIView is loaded from an XIB file.
http://developer.apple.com/library/ios/#documentation/uikit/reference/uiview_class/uiview/uiview.html
UIViewController
If in a UIViewController a common place to put it would be in viewDidLoad
http://developer.apple.com/library/ios/#documentation/uikit/reference/UIViewController_Class/Reference/Reference.html
Can anyone tell me how (or direct me to info on) displaying a .xib (nib) on another .xib (nib).
How ever I wish to place it so I can programically move it around the main nib sort of like this (which obviously doesn't work)
- (void)drawRect:(NSRect)dirtyRect
{
NSRect customView = NSMakeRect(pos1, pos1, 200, 100);
[[NSBundle mainBundle] loadNibNamed:#"secondXib" owner:self];
NSRectFill (customView);
}
And I wish to do this for Mac OS X (Not iPhone). (By the way using xCode 4 incase it makes a difference)
You can easily load a view from another nib using NSViewController. In your nib you should just set File's Owner's custom class to NSViewController and hook up the view outlet of File's Owner to point to the view you want to load. You can then just do this:
//create an NSViewController and use it to load the nib
NSViewController* vc = [[NSViewController alloc] initWithNibName:#"YourNibName" bundle:nil];
//get the view from the view controller
NSView* loadedView = [vc view];
//release the view controller so we don't leak
[vc release];
//add the view as a subview of your main view
[mainView addSubview:loadedView];
//position the view
[loadedView setFrameOrigin:NSMakePoint(100.0, 100.0)];
You don't need to do anything in drawRect:. The subview will draw itself, and drawRect: will be called automatically if you move the subview.
You should read the View Programming Guide for Cocoa. It is critical to understanding how views work, and it is clear from your question that you do not yet have that understanding.
You should also read the Cocoa Drawing Guide.
Thanks a lot,
Another alternative ( which is basically the non programming way of doing it ), is to add a NSViewController object in your first xib, and set it to you use the nib name that you specify.
In your second xib, don't forget to set the class name in the "custom class" field on the view ( and NSViewController on file's owner ) else that won't work.
I'm still very new to iOS developing. In fact, if there is a super noob, I would be one :p. Currently I am working on creating an IBAction button that accesses a subview. I have 2 ViewControllers, AddClientVC and NewClientVC, both with .nib files. So basically, inside my AddClientVC I implement an IBAction button with the following code:
- (IBAction)buttonPressed:(id)sender
{
UIView *transparentBG = [[UIView alloc] initWithFrame:CGRectMake(-5, -5, 1500, 2500)];
transparentBG.backgroundColor = [UIColor blackColor];
transparentBG.opaque = NO;
transparentBG.alpha = 0.5;
[self.view addSubview:transparentBG];
transparentBG.center = transparentBG.center;
vc = [[NewClientVC alloc] initWithNibName:#"NewClientVC" bundle:nil];
[self.view addSubview:vc.view];
vc.view.center = self.view.center;
}
As you can see I implemented a UIView as a transparent background. Basically AddClientVC --> Transparent Background --> NewClientVC. Now I have created another IBAction button but this time inside NewClientVC as a function to dismiss the accessed subview which looks like this:
- (IBAction)saveDismiss:(id)sender
{
[self.view removeFromSuperview];
}
The problem I'm having right now is when I click the saveDismiss button it only removes the subview that I called previously on AddClientVC but it didn't remove the transparent background I have created as a UIView. So the problem is how do I implement an action which simultaneously removes my subview and the UIView transparent background I created.
I need all the help I can get :)
I'm not too sure I fully understand what you want to happen, but maybe you could try something like this?
- (IBAction)saveDismiss:(id)sender
{
[vc removeFromSuperView];
[self.view removeFromSuperview];
}
I recommend not to manage your screens by adding subviews manually but instead use
- (void)presentModalViewController: (UIViewController *)modalViewController
animated: (BOOL)animated
method on your root viewController.
Or better instantiate a UINavigationController and use push and pop methods to drill down/up your views.
See apple reference here
Do not worry about code execution speed and stay confident in apple's SDK. UIKit is optimized for best user experience. Trying to boost your code by doing inappropriate SDK use is, in my opinion, a risky strategy. ;) – Vincent Zgueb
Sorry Vincent but I don't agree with you. I reached here because I want to implement an gesture that adds a sub-view for my view, which will be the navigation of my app.
[self.view addSubview:ctrl.view];
is faster presenting the view than
[self.navigationController presentModalViewController:ctrl animated:NO]
and by the way, the solution to the topic in my case was:
[self.view sendSubviewToBack:ctrl.view];
I set views programmatically. Here is how I do that. Let's say I have SettingsViewController.m
In this file I have two methods
-(void)loadView
{
UIView *view = [[UIView alloc] initWithFrame:[UIScreen mainScreen].applicationFrame];
self.view = view;
[view release];
}
-(void)didViewLoad
{
// In that method I create some buttons labels etc
}
Is my approach correct ? To create the view in loadView method and buttons, labels etc in viewDidLoad method
To be honest it doesn't really matter if you put the code for creating views in viewDidLoad or loadView. viewDidLoad is called after the view is loaded, so will even be called if you are instantiating from a XIB. So that's a good place to add extra views if you're using a XIB. If you're programatically creating the view like you are in loadView then you can put the creation of your buttons, labels, etc in loadView or viewDidLoad and it won't really make a difference - viewDidLoad is pretty much called straight after loadView runs anyway.
Personally if I'm creating a view programatically using loadView then I will put all of the view creation code in there rather than in viewDidLoad.
I am trying to work my way through basic iPhone programming and I have a good basic understanding of how Interface Builder works, so I decided to try my hand at doing the views programmatically. I have gone through the ViewController Apple guide and searched everywhere and I cannot seem to find a solution to my problem. This leads me to believe it is a very simple solution, but I am just really banging my head against the wall. Basically all I am trying to do is create a view that gets main window as a subview. I know that if self.view is not defined then the loadView method is supposed to be called, and everything is supposed to be set up there. Here is the current state of my code:
The delegate:
- (void)applicationDidFinishLaunching:(UIApplication *)application {
StartMenuViewController *aViewController = [[StartMenuViewController alloc] init];
self.myViewController = aViewController;
[aViewController release];
UIView *controllersView = [myViewController view];
window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
[window setBackgroundColor:[UIColor redColor]];
[window addSubview:controllersView];
[window makeKeyAndVisible];
}
The view controller:
- (id)init {
if (self = [super init]) {
self.title = #"Start Menu";
}
return self;
}
// Implement loadView to create a view hierarchy programmatically, without using a nib.
- (void)loadView {
UIView *startView = [[UIView alloc] initWithFrame:[UIScreen mainScreen].applicationFrame];
[startView setAutoresizingMask:UIViewAutoresizingFlexibleHeight|UIViewAutoresizingFlexibleWidth];
[startView setBackgroundColor:[UIColor greenColor]];
self.view = startView;
[startView release];
}
Thanks for the help in advance!
Are you sure that you're inheriting from UIViewController and not overriding the implementation of - (UIView*)view?
EDIT: More info:
UIViewController has a special implementation of the "-(UIView*) view" message so that when it's called, the loadView method is called if the view member variable is not set. So, if you provide an implementation of "- (id)view" in your subclass, (or a property named view) it will break the auto-calling of "- loadView".
Just to document a "loadView is not called" case:
I wrote a 2 UITableViewController(s) to handle detail data for a master ViewController. Since the devil was in #2, I made a simple UITableViewController for #1, and referenced it in the XIB for the "master" ViewController.
When I was done with #2, I could simply copy the code to #1, remove the complicated code, and go on with life.
But to my dismay and several days work, no matter what I did, viewLoad was not being called for my simple #1 UITableViewController.
Today I finally realised that I was referencing the UITableViewController in the XIB to the master ViewController program. - and of course, loadView was never being called.
Just to help some other dork that makes the same mistake....
Best Regards,
Charles
viewDidLoad only if the view is unarchived from a nib, method is invoked after view is set.
loadView only invoked when the view proberty is nil. use when creating views programmatically. default: create a UIView object with no subviews.
(void)loadView {
UIView *view = [[UIView alloc] initWithFrame:[UIScreen
mainScreen].applicationFrame];
[view setBackgroundColor:_color];
self.view = view;
[view release];
}
By implementing the loadView method, you hook into the default memory management behavior. If memory is low, a view controller may receive the didReceiveMemoryWarning message. The default implementation checks to see if the view is in use. If its view is not in the view hierarchy and the view controller implements the loadView method, its view is released. Later when the view is needed, the loadView method is invoked
again to create the view.
I would strongly recommend you use interface builder for at least your initial Window/View.
If you create a new project in XCode you should be able to select from one of many pre-defined iPhone templates that come with everything setup.
Unless I am reading this wrong, you did not associate any view with the the controller's view property like this
myViewController.view = controllersView;
So as far as Cocoa is concerned the view you are setting in the window has no controller to call loadView on. loadView is a View controller, not view, method. The view you assign to the window is not associated with any view controller. So your view controller loadView method is never called. Get it? The view you are trying to display, has no view controller associated with it.
When you use interface builder to create views you can link the UIView object you created in IB to the view property in the controller in IB which the framework automatically
But if not done in IB you have to set it