So I've a button with a IBAction heading to another ViewController by its initWithNibName method. Everything is embedded in a NavigationController.
I also created a .xib for this ViewController, here is a quick screenshot :
Here is my code :
.h
#interface ModeEmploiController : UIViewController
{
IBOutlet UIScrollView *scrollView;
UITextView *vueOffres, *vueInfos, *vueGrilles;
}
#property (nonatomic, retain) IBOutlet UIScrollView *scrollView;
.m
#implementation ModeEmploiController
#synthesize scrollView;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self)
{
[scrollView setScrollEnabled:YES];
[scrollView setContentSize:CGSizeMake(320, 529)];
// Here I define vueOffres, vueInfos and vueGrilles and for each of them :
[self.view addSubview:vueGrilles/vueInfos/vueOffres];
}
}
But when I run my app, my scroll isn't enabled and I don't have the navigation bar of my navigation controller. What's happening?
add another view inside the ScrollView i called mine content view. the do
self.scrollView.contentSize = self.contentView.frame.size;
for the navigation bar you need to have a uinavigation controller and make your controller the rootviewcontroller of the navigation controller. like this
-(IBAction)MyButton:(id)sender
{
MyViewController *controller = [[MyViewController alloc] initWithNibName:#"MyView" bundle:nil];
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:controller];
[self.navigationController presentModalViewController:navController animated:YES];
}
Remove your ModeEmploiController from xib, but keep its child View and ScrollView.
now click on File's Owner and put ModeEmploiController from Identity inspector in right panel.
Now right click on File's Owner and connect property of view to View and scrollView to ScrollView.
Your initialization code is in the wrong method.
Since you are using Storyboards, your view controller is being unarchived from a nib file. The correct place to initialize the controls is in the awakeFromNib method.
Make sure that you have set up an IBOutlet property for your scroll view and hooked it up in the Storyboard, and then:
- (void)awakeFromNib {
[self.scrollView setScrollEnabled:YES];
[self.scrollView setContentSize:CGSizeMake(320, 529)];
// Here I define vueOffres, vueInfos and vueGrilles and for each of them :
[self.view addSubview:vueGrilles/vueInfos/vueOffres];
}
That just leaves the problem of the subview that you are adding. What is vueGrilles/vueInfos/vueOffres? You should create this view properly within the viewDidLoad method and add it as a subview there instead of in this initialiser.
Related
I'm showing an NSPopover in an NSView, originating from a point on an NSBezierPath. I'm able to show the popover without a problem, but I can't seem to set the string value of the two text fields in it. The popover and the content view are both a custom subclass of NSPopover and NSViewController, respectively. The NSPopover subclass is also the NSPopover's delegate, although I don't implement any delegate methods, so I'm not sure I even need to do that.
Here is my subclass of NSViewController:
#import <Cocoa/Cocoa.h>
#interface WeightPopoverViewController : NSViewController
#end
#import "WeightPopoverViewController.h"
#interface WeightPopoverViewController ()
#end
#implementation WeightPopoverViewController
- (id)init {
self = [super initWithNibName:#"WeightPopoverViewController" bundle:nil];
if (self) {
}
return self;
}
#end
And my subclass of NSPopover:
#import <Cocoa/Cocoa.h>
#interface WeightPopoverController : NSPopover <NSPopoverDelegate> {
NSTextField *dateLabel;
NSTextField *weightLabel;
}
#property (strong) IBOutlet NSTextField *dateLabel;
#property (strong) IBOutlet NSTextField *weightLabel;
#end
#import "WeightPopoverController.h"
#implementation WeightPopoverController
#synthesize weightLabel;
#synthesize dateLabel;
#end
This is the code in my NSView subclass that opens up the popover:
#interface WeightGraphViewController () {
WeightPopoverController *popover;
WeightPopoverViewController *vc;
}
...
-(void)mouseEntered:(NSEvent *)theEvent {
// initialize the popover and its view controller
vc = [[WeightPopoverViewController alloc] init];
popover = [[WeightPopoverController alloc] init];
// configure popover
[popover setContentViewController:vc];
[popover setDelegate:popover];
[popover setAnimates:NO];
// set labels
for (id key in (id)[theEvent userData]) {
[popover.weightLabel setStringValue:[(NSDictionary*)[theEvent userData] objectForKey:key]];
[popover.dateLabel setStringValue:key];
}
// set the location
(redacted, irrelevant)
// show popover
[popover showRelativeToRect:rect ofView:[self window].contentView preferredEdge:NSMaxYEdge];
}
-(void)mouseExited:(NSEvent *)theEvent {
[popover close];
popover = nil;
}
In WeightPopoverViewController.xib, I've set the File's Owner to WeightPopoverViewController and connected the view to the custom NSView. In this xib I also have an Object set to WeightPopoverController with the dateLabel and weightLabel connected to their text fields and the contentViewController set to File's Owner.
I think where I am going wrong is likely related to how I have configured my class / instance variables for the NSPopover, but from the research I've done and documentation I've read I can't seem to crack where I've gone wrong. Any help would be appreciated.
UPDATE:
I removed the NSPopover subclass from code and from IB. I put my outlets in my NSViewController and connected them in IB. However, I'm still not able to set the string values. The following won't compile with the error "Property 'weightLabel' not found on object of type NSPopover*'".
#interface WeightGraphViewController () {
NSPopover *popover;
...
}
-(void)mouseEntered:(NSEvent *)theEvent {
vc = [[WeightPopoverViewController alloc] init];
popover = [[NSPopover alloc] init];
[popover setContentViewController:vc];
[popover.dateLabel setStringValue:#"test"];
}
I have the property definition exactly as I had it in my NSPopover subclass, but now in my NSViewController. This is actually what I had before, and since I wasn't able to set the properties from the NSViewController, I figured I needed to do it through a subclass of NSPopover. This is why I thought I am having an issue with how I have configured my class / instance variables.
You seem to be creating two popovers, one in code (popover = [[WeightPopoverController alloc] init]) and one in Interface Builder (In this xib I also have an Object set to WeightPopoverController). Have a think about what you’re trying to achieve.
I would also advise against subclassing NSPopover. I believe this is causing confusion and is unnecessary. Instead, put the outlets to your dateLabel and weightLabel in the popover’s content view controller.
I've experienced something that I think is similar. The root problem is that the "outlets" connecting your view (XIB) to your controller are not initialized until after the view has been displayed. If the controller tries to set properties on any UI controls in the view before the popover has been opened, those changes are ignored (since all the controls will be nil).
Luckily, there's an easy solution (as mentioned in this answer): just invoke the view getter on your controller, and it will force the view to initialize sooner.
In other words:
popover = [NSPopover new];
myController = [[MyViewController alloc] initWithNibName:#"MyView" bundle:nil];
popover.contentViewController = myController;
[myController view]; // force view to initialize
...set some values on myController... // works because view is now loaded
[popover showRelativeToRect: ...];
I'm trying to make a button take me to a new UIViewController based on the content of a textField, but when I run it and hit the button (with the right condition in the text field to take me to the new UIViewController), the screen blacks out. This is what I wrote in my .h and .m files. Can anyone help me (Im using storyboards)
#interface ViewController : UIViewController
- (IBAction)boton:(id)sender;
#property (strong, nonatomic) IBOutlet UITextField *texto;
#end
#import "ViewController.h"
#import "ViewController2.h"
#interface ViewController ()
#end
#implementation ViewController
#synthesize texto;
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)boton:(id)sender {
if ([texto.text isEqualToString:#"1"]) {
ViewController2 *vc1=[[ViewController2 alloc]init];
[self presentViewController:vc1 animated:YES completion:nil];
}
}
#end
As you say the screen is blacking out, I expect your viewController is getting initialised without a view.
To initialise with a view hierarchy from a xib(nib) file:
- (id)initWithNibName:(NSString *)nibName bundle:(NSBundle *)nibBundle
where nibName can be nil if it shares it's name with the View Controller, and nibBundle can be nil it the nib is in the main bundle.
i.e....
ViewController2 *vc2;
vc2 = [[ViewController2 alloc] initWithNibName:nil
bundle:nil];
where the xib file is named ViewController2.xib
To initialise from a storyboard:
UIStoryboard *storyboard = self.storyboard;
vc2 = [storyboard instantiateViewControllerWithIdentifier:#"ViewController2"];
(you need to set up a viewController in storyboard and give it a matching identifier)
To initialise with neither storyboard or xib, you should override your view controller's - (void)loadView, create a view and assign it to self.view.
Update
In answer to your comment - the UIStoryboard... and ViewController2 *vc2= ... code would go into your button code (in your case it you would replace / adapt the line containing vc1=.... It would look like this:
- (IBAction)boton:(id)sender {
if ([texto.text isEqualToString:#"1"]) {
ViewController2 *vc2;
UIStoryboard *storyboard = self.storyboard;
vc2 = [storyboard instantiateViewControllerWithIdentifier:#"ViewController2"];
[self presentViewController:vc2 animated:YES completion:nil];
}
You will need to have created a storyboard scene in your storyboard with a viewController whose custom class is ViewController2 and identifier is "ViewController2". The identifier name is arbitrary, but must match the identifier string you use in your code.
As you are using storyboards, an alternative way to do this is to create a modal segue from the 'ViewController' scene to a 'ViewController2' scene, give it an identifier, and use performSegueWithIdentifier in your button method.
How do you add a navigation controller on a newly created view controller? i've search everywhere but all the tutorials are from creating a navigation controller project.
Anyone can lead mo to a tutorial that creates a navigation controller using a view controller subclass?
What i'm doing so far:
I created a UIViewController Project, and i have something like this to go to another view controller, with a navigation controller.
NavController *view=[[NavController alloc] initWithNibName:nil bundle:nil];
view.modalTransitionStyle=UIModalTransitionStyleCrossDissolve;
[self presentModalViewController:view animated:YES];
[view release];
Added a new view controller subclass.
Add > New File > UIViewController subclass with nib
on NavController.h
#import <UIKit/UIKit.h>
#interface NavController : UIViewController {
IBOutlet UIWindow *window;
IBOutlet UINavigationController *navCon;
}
#property (nonatomic, retain) UIWindow *window;
#property (nonatomic, retain) UINavigationController *navCon;
#end
on NavController.m
#import "NavController.h"
#implementation NavController
#synthesize window,navCon;
- (void)viewDidUnload {
[super viewDidUnload];
}
- (void)dealloc {
[window release];
[navCon release];
[super dealloc];
}
#end
i already dragged a Navigation Conrtoller and a Window on my IB, and connected window to window and the Navigation Controller to navcon outlets, but whats next?
If you're using the storyboards select your view controller then in top menu choose "editor" / "embed in" / "navigation controller".
Normally, you have to create an Navigationcontroller object inside your Appdelegate.h (like the existing window object). After that you import the h.File of a ViewController into the Appdelegate.m and init it like in the following example the menuviewcontroller.
stackoverflow
To call another view use following lines of code, so the navigationcontroller will handle everything for you.
#import Viewcontroller
ViewControllerName controllerVarName = [ViewControllerName alloc] init];
[self.navigationcontroller pushViewController:_ViewControllerName animated:YES];
Inside your specific ViewController use this line to set the title the Navigationcontroller will use:
self.title = #"titleName";
Hey guys I'm a newbie developer with cocoa and I'm Trying to create a simple app. which display 4 differents pages that you can select via a tab bar.
My Problem: I made a UIButton on the First/Home page (==>FirstView.xib) with IB and i tried to link it to my second page (==>SecondView.xib) with some code found on the net.
The thing is that i can build my code but nothing happens when I try to click on my button, can you help me ?
Code for FirstView.h:
#import <UIKit/UIKit.h>
#interface FirstViewController : UIViewController {
UIButton *button;}
#property (nonatomic, retain) IBOutlet UIButton *button;
- (IBAction)goToViewTwo;
#end
Code for FirstView.m:
#implementation FirstViewController
#synthesize button;
- (IBAction)goToViewTwo {
SecondViewController *SecondView= [[SecondViewController alloc] initWithNibName: #"SecondView" bundle:[NSBundle mainBundle]];
[self.navigationController pushViewController:SecondView animated:YES];
}
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
- (void)dealloc {
[super dealloc];
[button release];
}
#end
About the outlets in FIrstVIew.xib:
I linked "Touch Up Inside" to "goToViewTwo" and "b^utton" to "File's Owner'
I'm under the impression this is in a tab bar where each tab bar button displays a .xib file. If this is the case, the solution is fairly simple. Your tabBarController manages your views in an array of view controllers. To switch between them, your IBAction method should be the following:
- (IBAction)goToViewTwo {
self.tabBarController.selectedIndex = 1;
}
This tells your tab bar controller to switch from your current view controller (at index 0) to the second (at index 1)
I'm currently working on a view based app for the iPad that has 3 seperate views on the main page. A custom menu up the top, a status list on the side, and a main view. The issue I am having with the main view is trying to add a navigation controller.
In AppPadViewController.h
#interface AppPadViewController.h : UIViewController {
MainViewController *MainView;
}
#property (nonatomic,retain) IBOutlet MainViewController *MainView;
And in AppPadViewController.m
#synthesize MainView;
- (void) viewDidLoad {
[super viewDidLoad];
MainView.navigationItem.title = #"Home";
UINavigationController *mainNavController = [[UINavigationController alloc] initWithNibName:#"MainView" bundle:[NSBundle mainBundle]];
self.MainView = [MainViewController alloc] initWithRootViewController:mainNavController];
}
And in the nib I have added the view where I would like it, and tied it in to the MainView, and then added the MainViewController and tied it to the File Owner and view.
When I run this, I get an 'Unrecognized Selector" error thrown on the initWithRootViewController line.
Can anyone see any problem with the code, or suggest a better way to add a navigation controller to a sub view?
You have your two view controllers reversed. Try something like this:
self.MainView = [[MainViewController alloc] initWithNibName:#"MainView" bundle:[NSBundle mainBundle]];
UINavigationController *mainNavController = [[UINavigationController alloc] initWithRootViewController:MainView];