Just want to confirm this, as I'm trying to learn monoTouch alone..
I have a view which I navigate to using NavigationController.PushViewToController(). On the destination view, I have a Navigation Bar. I can add a button to the bar and use code to push to another view (I happen to know where Back is), fine.
Is there a existing "back button" control? Or a way in to code to change the existing back button to say "Go back"?
In Interface Builder I can see there is a property on the navigationItem called "Back". When I add text to this I can see a new BarButtonItem added to the navigationBar. However I never see this button when I navigate to the view in the simulator. If I try to drag the item onto the view manually, the "Back" text is cleared and the button is treated like a custom button.
Do I always have to manually code the back button?
The default back button (the one that takes the name of the previous controller) cannot be customized. But you can hide it and replace that button with a new one.
If you have a controller, you can do that on the viewDidLoad method. Overriding this method you are sure that all the elements have been set.
// allows you to hide the back button
NavigationItem.SetHidesBackButton(true,true);
// allows you to create a new customized button
NavigationItem.LeftBarButtonItem = new UIBarButtonItem(...);
UIBarButtonItem takes an handler that you can use to control the navigation.
In the handler you can do this:
NavigationController. PopViewControllerAnimated(true);
Related
I have a ViewController1 and ViewController2. ViewController1 has a NavigationController set to it. I have a button (Custom Search Icon) on the NavigationBar. Now I press control+click and drag to ViewController2 and set it to Show. When I press it, it doesn't work. I also tried to drag the button to ViewController1 and set it as an IBAction but that doesn't work either.
What I want accomplished:
I want to create a button on the left side of the NavBar. When clicking it, I want to be add the searchbar and allow the user to search from an array. What is the best way about doing this? The search bar also has the cancel button, and if pressed the user should return back to his previous ViewController. I don't want anyone to the work for me but if you could point me to the right direction, it would be awesome.
I'm assuming by "Custom Search Icon", you mean a UIBarButtonItem in the navigation bar. If that's the case you should be able to segue to a controller using the technique you described, so you could try putting in a new UIBarButtonItem and try again.
But for the problem you're describing I might recommend a slightly different approach using UISearchController. Since it sounds like you're using storyboards, drag in the Search Bar and Search Display Controller from the object library to your controller, just below the navigation bar.
Check out UISearchController documentation:
[https://developer.apple.com/library/prerelease/ios/documentation/UIKit/Reference/UISearchController/ ]
And here's a sample project from Apple:
[https://developer.apple.com/library/ios/samplecode/TableSearch_UISearchController/Introduction/Intro.html ]
Good luck!
Delete all the connections from the interface builder first. Clear the codes associated to the button.
Create an IBAction and put a break point to see if its called when u click the button.
If it does get called then push a new ViewController onto it,(ViewController2).
Add your search bar here on the ViewController 2.
I'm trying to create a back button on my navigation bar in x code. However when I drag it across from the objects library to the navigation bar in the storyboard it doesn't come up.
OK So this is crazy but...
Click on the navigation bar and in the attributes inspector, Just Type something in the field marked Back Button. Then in the scene hierarchy you'll see the button, though it won't yet appear on your navbar. In the hierarchy, drag the button onto the Navigation Item and viola it appears. Now to make second one, hold option and copy the first one. If you try to add one from the object browser, you'll lose the first one.
If done properly, the first will show up on the right and the second on the left.
Good luck.
This happens when the navigation is not set up correctly, as dbajkovic mentioned, if you do not have a navigationcontroller, it will not work. Your scoreboard should look like this:
You can not add the button to the left, only to the right.
#Jonathan Thompson: I came across your post and since I just learnt something new, I am going to add it as a response to your question.
There are two separate buttons - Back button and Bar Button. Back button has a reverse (right to left) pointing arrow and a Bar button is a regular rectangular button. The following describes how your could implement them in your program:
Back button:
On the root view controller, ctrl + click on button and drag it to the view controller you are trying to connect it to. When you are given an option to select from, choose Push, not modal. This will automatically add a back button on the next view controller. (Run the program to confirm it.)
Bar Button: (Credit: dbrajkovic)
For adding the bar button, click on navigation bar of the navigationViewController you are interested in. Under Attributes inspector, type some name in Back Button and hit enter to confirm. Open document outline and locate the viewController you were working on. On the left side of Navigation Item locate the disclosure triangle. Click on the Bar Button Item. Ctrl + click + drag the button to the navigation bar of that viewController. You can choose whether to place it on the left / right side.
want to click a button through javascript for testing purpose. i am able to click the button which is on first page, but dont have idea how to click button on second page which comes after clicking button on first page.
You just need a reference to that button on the second page -- so you repeat the process from the first page. Probably, you did something like this (this code is from my app using a tab bar controller):
// Now tap the add button
var navBar = mainWindow.navigationBar();
navBar.buttons()["Add"].tap();
// Now the app loads a new page
// Get the nav bar again (it would have changed after the tap above)
navBar = mainWindow.navigationBar();
So, the answer is easy -- just call back to the same functions, they will return whatever's on screen at the moment.
First you have to ensure that the button is accessable. Either set the Accessability property in Interface Builder (Identity Inspector - last Tab) and give the button an appropriate Accessability Label. If you don't use Interface Builder you can set the property on the button programaticaly.
Now in the script you can call
mainWindow.buttons()["name of the accessability label"].tap();
mainwindow is:
var target = UIATarget.localTarget();
var application = target.frontMostApp();
var mainWindow = application.mainWindow();
Make also sure that the button is visible. The button has to be the deepest element in the view hierarchie which is marked accessable. If the view containing the button is enabled as accessable, it would hide the accessability of the button (which is a subview).
You can log all visible elements in the screen by
mainwindow.logElementTree();
Moreover, you always can use one single script. The mainWindow.elements() references the view which is shown at a certain moment.
I have a view that creates a new core data managed object, and fills in all the required properties and also allows optional ones. I originally had a "Done" button on the top left, and when that was pressed, I validated the object then saved and removed the view.
Now I have an edit/done type setup on the top right, so sometimes there are two identical "Done" buttons on the top of the view. I want to switch the left side button so that it just has the normal "Back" button, then somehow validate and stop the view from being removed if it doesn't validate. I can't find any way to capture the method called by that back button and modify it, and viewWillDisappear doesn't work cause there's no way to abort the disappearing.
How can I make this work? I need to validate this, then save, then remove the view if validate and save worked only.
It sounds like your view is a perfect candidate to be pushed modally instead of through the navigation controller stack.
Push the view that creates your NSManagedObject modally:
[self presentModalViewController:yourViewController animated:YES]
Then continue to use your top right EDIT/DONE button for editing/validation as you currently are and when validation is successful simply save your object and dismiss the modal view controller from the parent view controller:
[[self parentViewController] dismissModalViewControllerAnimated:YES];
For more details check http://developer.apple.com/library/ios/featuredarticles/ViewControllerPGforiPhoneOS/ModalViewControllers/ModalViewControllers.html#//apple_ref/doc/uid/TP40007457-CH111-SW14
If you still want to use a button on the left hand side perhaps you can change the right button to say EDIT/CANCEL and add a DONE button on the left side that is only visible when you're not in EDIT mode. If appropriate you can point the DONE button to run through the same validation process before dismissing the modal view using the code above but it probably makes sense that the EDIT/CANCEL button takes care of it.
I hope this helps.
Rog
There is no documented way to intercept the standard back button of UINavigationController. If you want this functionality, your only option would be to customize leftBarButtonItem with a custom button.
When the user taps that button, you can first validate your object and then call popViewControllerAnimated:.
It's hard to mimic the look of the built-in back button, though.
I have added add(+ symbol button) button to my navigation controller.
When I click it a view appears from bottom. I added a navigation bar and two buttons to it.
One save and one cancel button. And the view have one textEdit box. After editing I can save or cancel. If I touch cancel I need the view to disappear like it should go down again.
I think all iPhone , iPodTouch users use it. Like when they touch Add item then a view appears from bottom and when they cancel it goes down again. How can I make in this way in my application.
Maybe you're talking about a UIActionSheet?!?
http://developer.apple.com/IPhone/library/documentation/UIKit/Reference/UIActionSheet_Class/Reference/Reference.html