I am trying to add a "Home" button to my app, where if you click on a button in the toolbar, if will take you to a specific url "google.com".
So I can put a button in the nav bar, and make it say home.
and I can put this in the viewcontroller.m:
-(void)openGoogleURL
{
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:#"https://www.google.com"]];
}
Is what I put in viewcontroller correct? How do I hook up my button?
UINavigationController uses a UINavigationItem object of each UIViewController to display the items in navigation bar. So you can add the button you want in the bar by doing something like this on your View Controller:
[self.navigationItem setRightBarButtonItem:[[UIBarButtonItem alloc] initWithTitle:#"Home" style:UIBarButtonItemStylePlain target:self action:#selector(openGoogleURL)]];
That way the button target-action will be linked with the function you've defined in your UIViewController.
Note that for every view controller you want to add this button, you'll need this code.
You can wire the button click event to your code either programmatically or by using Interface Builder. Here's some documentation from the Apple's website: https://developer.apple.com/library/mac/#documentation/General/Conceptual/Devpedia-CocoaApp/TargetAction.html
Related
I have a storyboard setup (the default) with the tabbed application template.
I want to add a BarItem and have that launch a URL when touched. I don't want it to go to a view in the app. How can I do this using the storyboard?
I am new the story board concept and not sure what to add to the story board to add a new bar item and then make it call a method.
First you need to put a function in the ViewController code something like...
- (IBAction)barButtonPressed:(id)sender
{
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:#"http://www.google.com"]];
}
Then go add the button to the view controller in the Storyboard and ctrl click drag from the button to the function.
This will make the button run that function when pressed.
If you mean the Navigation bar
//in viewDidLoad or wherever
UIBarButtonItem *openWebLink = [[UIBarButtonItem alloc]
initWithTitle: #"OpenWebLink"
style: UIBarButtonItemStyleBordered
target: nil action: #selector(openLink)];
[self.navigationItem setBackBarButtonItem: openWebLink];
-(void) openLink
{
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:#"http://www.google.com"]];
}
If you don't, look at Fogmeister answer
Code not tested!
I'm displaying a UITableViewController inside a popover. Everything works fine. Now I want that little "Edit" Button on the top right to reorder the cells. But unfortunately I can't achieve this.
I have implemented the 2 delegete methods for reordering, and in my tableviewcontroller I call this on viewdidloead
[self setEditing:YES];
self.navigationItem.rightBarButtonItem = self.editButtonItem;
but for some reason I can't see the navigation bar on top that should display the edit button.
what am I doing wrong?
thx in advance
you can create your UITableViewController in the same way you did it now, embed it in an UINavigationController using – initWithRootViewController: and show the navigation controller in the popover
I do not want to create a custom navigation bar.
I am pushing a UIViewController and I want to customize how the navigation bar looks for that UIViewController
In story board, we just specify the segue and a nav bar show up on the screen. We just drag and drop UIBarItem to the left and right.
In XIB, the navigationBar simply doesn't show up.
I can add navigation Item but the one I added is ignored.
I've heard that there used to be an outlet called navigationItem but it's deprecated for reason I do not know.
I can add UINavigationBar, however that would be adding my own custom bar. I want the navBar that's provided by UINavigationController.
The appearance of the Navigation Bar in the storyboard designer is just there to illustrate how your screen will look when you load your ViewController inside a UINavigationController. It doesn't mean that you actually have a navigation controller in your app.
You need to add a UINavigationController to your storyboard (probably as the first scene), and then connect your ViewController to it (as the root view controller).
Then you should be able to set your title in the storyboard designer, and drag bar button items onto the navigation bar.
See also the answer to this question.
You can setup it in code.
- (void)viewDidLoad
{
[super viewDidLoad];
self.title = #"Title";
self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:#"Back"style:UIBarButtonItemStyleBordered target:self action:nil];
self.navigationItem.rightBarButtonItem = "Create button" ;
self.navigationItem.leftBarButtonItem = "Create button" ;
self.navigationItem.titleView = "Create custom title view";
}
I think this is the actual way apple want this to be implemented.
Put UINavigationBar
Set outlet to the UINavigationItem
This is the catch
Override navigationItem property to return the UINavigationItem you created.
That's it.
-(UINavigationItem *) navigationItem
{
return self.navigationItem1;
}
If your navigationItem is still in the UINavigationBar, I think you will need to have a strong outlet to the UINavigation Bar too. Please correct me if I am wrong here.
I need on my main view controller to have a tab bar with tabs to navigate to all my other controllers. I just need the tab bar on this controller and when i get to another controller i just need to have a back button to go to the main controller.
Now i have some questions. I created the tab bar in the main view controller and all the tabs with the text and images that i need. However i see that i can only create IBOutlet for the tab bar and not IBActions for every tab(as i thought). So i created an IBOutlet and connected it to my tab bar.
How can i refer to every tab?
If i can refer to every tab how is it possible to change the view controller when a tab is selected when i cant use an action about it?(I am not asking for the code to change controllers , i am asking for the place that i should put the code so that my application knows that this specific tab was pressed and has to change controller).
Thank you for reading my post :D
You can create a UITabBarController programmatically in applicationDidFinishLaunching and set it as the root view controller (or if you prefer, you can present it as a modal view). Here is the minimal code to do it:
UITabBarController *tabBarController = [[UITabBar alloc] init];
UIViewController *controller1 = [[YourViewController alloc] init];
UIViewController *controller2 = [[YourOtherViewController alloc] init];
tabBarController.viewControllers = [NSArray arrayWithObjects:
controller1,
controller2,
nil];
// set as the root window
window.rootViewController = tabBarController;
If you want to customize the look of the tab bar items, do so by adding overloading (UITabBarItem *)tabBarItem in the child view controller(s):
- (UITabBarItem *)tabBarItem
{
return [[UITabBarItem alloc] initWithTitle:#"Amazing" image:[UIImage imageNamed:#"Blah.png"] tag:0];
}
How to make a tab bar controller
by me
Drag tab bar controller into storyboard (hopefully you have one)
Control-drag from tab bar controller to each view you want hooked up to it
Pop bottles
Just so you know, this gives you the default tab bar controller behavior (so it will always be present and you can click from any page to another). If that's not what you want, then don't use a tab bar controller. To do otherwise is an abomination.
Storyboards are definitely helpful, but if you don't want to use one that's fine. Doing the Control Drag from the Tab Bar Controller to your new View Controller does indeed work (Dustin's response).
i have a view controller, which is standalone and has two left UIBarButtonItem, however when i push it, i want to have these two buttons + the back button
i tried
- (void)viewDidLoad
{
[super viewDidLoad];
// back
if (self.navigationController.navigationItem.backBarButtonItem) {
self.navigationItem.leftBarButtonItems = [NSArray arrayWithObjects:self.navigationController.navigationItem.backBarButtonItem, self.barButtonFilter, self.barButtonFilterContacts, nil];
} else {
self.navigationItem.leftBarButtonItems = [NSArray arrayWithObjects:self.barButtonFilter, self.barButtonFilterContacts, nil];
}
}
if there is a back button, than add, else replace
but i didnt work
I am not able to get your problem but according to your caption you want to replace you back button of UINavigationController with a bar button item, in that case you simply need to have a custom button in place of back Button:
UIBarButtonItem *backButton= [[UIBarButtonItem alloc] initWithTitle:#"yourTitle" style:UIBarButtonItemStylePlain target:self action:#selector(someFunction:)];
self.navigationItem.rightBarButtonItem = backButton;
[backButtonrelease];
If this is not your problem please elaborate.
So the issue here is that a UINavigationBar can only have one leftButtonItem and one rightButtonItem. But What you can do is in the center of the UINavigationBar you can have a UIView. You can use this to place the buttons on.
Someone has the code here: adding-buttons-to-the-titleview-of-navigationbar-without-having-to-repeat-code
From Apple's iOS Human Interface Guidelines:
Use a toolbar instead of a navigation bar if you need to offer a
larger set of controls, or you do not need to enable navigation.
Avoid crowding a navigation bar with additional controls, even if
there appears to be enough space. The navigation bar should contain no
more than a view’s current title, the back button, and one control
that manages the view’s contents. If, instead, you use a segmented
control in the navigation bar, the bar should not display a title and
it should not contain any controls other than the segmented control.
http://developer.apple.com/library/ios/#documentation/userexperience/conceptual/mobilehig/UIElementGuidelines/UIElementGuidelines.html