Currently my custom keyboard has only one layout: the Qwerty keyboard is only letters. I want to create a button that will switch to the numbers and symbol part of every keyboard. Because I am new to programming I figured I should make two different xib files: one with letters and the other with numbers and symbols. In order to switch between the two xib files (Keyboard.xib and AltKeyboard.xib) I tried to create a button in the AltKeyboard.xib that would go to the Keyboard.xib and this is my code:
#pragma mark AltKeyboard
-(void)addGesturesToAltKeyboard{
[self.altKeyboard.altKey addTarget:self action:#selector(initWithNibName:"Keyboard" bundle: nil) forControlEvents:UIControlEventTouchUpInside];
}
However, this does not work, so I was wondering if I could get some advice in what I could do now.
Related
I am trying to create a simple app which uses a main view and has a smaller subview within it. I need to have buttons in the subview and I am having trouble getting the connections for the buttons to work. I have done the following:
Create a new View-based project, which gave me the ViewController.h & .m, the MainStoryboard.storyboard and the AppDelegate.h & .m.
Create the subView using NewFile - Objective-C Class - then naming it "subView1" and making it a subclass of UIViewController and checking the with xib check box.
This gave me the subView1.h &.m files and the subView1.xib.
I then re-sized the subView in the xib, by setting it's size to "FreeForm" in the attributes inspector and then specifying the width (to 280) and height (to 300) in the size inspector. I also change the background colour to differentiate it from the main view.
I then dragged a UIButton into the subView and connected it as an IBAction (which i named "clickButton1") to the subView1.h file using touchupinside.
For testing purposes only i then used a simple NSLog to check the functionality of the button which i placed in the subView.m file as follows:
-(IBAction)clickButton1:(id)sender {
NSLog(#"It Worked!");
}
In my ViewController.m file in the viewDidLoad i then added the following code to add the subview to the main view:
subView1 *sv1 = [[subView1 alloc]init];
sv1.view.frame = CGRectMake(20,120,280,300);
[self.view addSubview: sv1.view];
This all worked fine, and when i run the app i get the main view and the subview appear as expected. The problem is when i click on the button which is located in the subview it crashes with the following error:
Thread1:EXC_BAD_ACCESS(code=1, address=0xe00000008)
From what i have read i believe this may have something to do with how I am adding the subview and the fact that I am using ARC. Something about once the subview is added it is automatically released and therefore all buttons/connections etc within the subview are lost.
So my two questions are 1) Am i missing something silly here and is there an easy fix? and 2) Is this an appropriate way to create an app which uses subviews with buttons within them or is there a better way? Thanks to anyone who takes the time to answer!
I tried to reiterate what you said.
So you first made a View-Based Application (checking the "Use Storyboards" checkbox), and you put a button in the storyboard. Then, you control-dragged the button to the "ViewController.h" file. If that is right, you should just be able to put
NSLog(#"It Worked!");
in the method implementation (at least, I could do that)
Okay gang, I'm scratching my head on how to accomplish this one so I wanted to put it out to the world at large.
Essentially what a client wants is a way to toggle PART of a view based on whether the user selects a "Yes" or "No" option. My question is how would I go about accomplishing that?
Allow me to provide some more details. Within this specific app resides a form (a form with custom text fields, picker views, switches, sliders and other UI elements) that have all been laid out in a Storyboard, then programmed to function. About 3/4 of the way down this form, the user will be greeted with a "Yes" or "No" option and a button for each. The trick is that each view needs to have its own UI elements (text fields, sliders and buttons) appear ONLY when one of the options is selected and only BELOW the "Yes" or "No" option (all the elements above it need to remain, stay in the same place and hold the information the user enters).
An example : If the user hits the "Yes" button, below it 3 lines of text followed by a UIButton and Text Field would appear. Underneath this, other navigation buttons which navigate to other ViewControllers would appear. However, if the user hits the "No" button , all of those items I mentioned a moment ago would need to disappear, and instead a different set of text fields, labels, buttons and background image would need to appear. The navigation buttons will also need to link to other ViewControllers, different from the buttons in the "Yes" option. At this point I suggested to the client that a Navigation controller rooted at the bottom of the screen would be a good idea, but they are vehemently opposed to this and instead want the navigation options to be "dynamic" (or change according to which option is pressed, "Yes" or "No").
I have thought to attempt this programatically by simply using each button to load in a different image, this works just fine. The hitch then becomes twofold;
1) When I attempt to load the other UI elements that I get no way to lay them out in a storyboard and thus they appear in sporadic locations and
2) All this needs to be contained within a scroll view, which ALSO needs to change its size depending on how much space is needed below the yes and no option. Naturally the "Yes" section is 3 times smaller than the "No" section.
So, any ideas on how to make all this happen? I should mention at this point that the client also does not wish to simply navigate to a different ViewController, they very much want all this to occur on the same screen. I wish I had some code to share but we are still in the "design" aspect of this project and as such, very little code has been written. Any advice will be much appreciated as I've never been greeted with this type of build request before.
Create a UINavigationController object and set your view(say yourViewController) where your Yes and No buttons exist as a root view controller as below
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:yourViewController];
Now when user press YES/NO button on yourViewController view than you can programmatically create all controls text field and buttons and set frame according to your view. like
UITextField *txtField = [[UITextField alloc] initWithFrame:CGRectMake(enter frame accordinglly)];
[self.view addSubview:txtField];
same you can add more controls like buttons or any other controls.
after that when user press any the button(on which you want another view to display) you can push other view in the navController as below
[navController pushViewController:otherViewController animated:YES];
you need to keep track of navController in your yourViewController
when you want to go back just pop view from navController
[navController popViewControllerAnimated:YES];
PS: please be watchful for memory deallocation as well.
Playing around with some Objective-C (well, iOS) and have done the following... loaded some UIButtons programmatically into a UIScrollView. That works well. Though I've always just connected UIViewControllers together using control-click and drag. Now I've created buttons programmatically, I have no idea how to go from one view controller to another in a Storyboard because there is nothing to drag from!
I'm not really sure what code to post as such, because I haven't done anything that /nearly/ works or doesn't work as such. I get how to do it with XIBs. But I suppose the question is : 3 UIButtons have been created programmatically and I have 3 UIViewControllers. How do I access those ViewControllers using my UIButtons?
Thanks
In the Interface builder view control click and drag from the viewcontroller icon under the first view controller, to the middle of the second view controller. A segue will be created, selected the appropriate type.
Now select the segue and in the inspector give it a unique identifier (say 'myNewSegue').
Now in your first viewcontroller you can create a method that has the following code:
-(void)myButtonAction:(id)sender {
[self performSegueWithIdentifier:#"myNewSegue" sender:self];
}
And add this method as a target action to your button:
[myButton addTarget:self
action:#selector(myButtonAction:)
forControlEvents:UIControlEventTouchUpInside];]
A segue doesn't have to have a button at the leading end of it; you can instead draw it from an entire view controller to another. You can also give a segue an identifier, a string that's used as a name for that segue. Once you've done that, you can programmatically trigger that segue by calling -performSegueWithIdentifier:sender:.
To actually call -performSegueWithIdentifier:sender:, though, you'll need to connect the button to a target and action. If you've never done that, read the Event Handling Guide for iOS in your documentation.
I set the button background in the interface builder, but that wasn't showing up so I set it programmatically. All (but one button... why?) shows on the simulator but never show on a device.
I get this output:
Could not load the "gray_button.png" image referenced from a nib in the bundle with identifier "com.example.ios"
This is the code:
- (void) viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[self.getMyTripButton setBackgroundImage:[UIImage imageWithContentsOfFile:
[[self getFullPathname] stringByAppendingPathComponent:#"images/gray_button.png"]]
forState:UIControlStateNormal];
[self.popupButton setBackgroundImage:[UIImage imageWithContentsOfFile:
[[self getFullPathname] stringByAppendingPathComponent:#"images/gray_button.png"]]
forState:UIControlStateNormal];
[self.viewOurPackages reloadData];
}
I have also tried replacing imageWithContentsOfFile with imageNamed and both yield the same results.
I have added the images directory in my Project > Targets > Build Phases > Copy Bundle Resources, but I think this is where it all starts to go wrong and I can't figure out why. Possibly because it's a directory?
I would like to point out that I have double and triple checked that it is not a capitalization/case-sensitive issue.
UPDATE: I have solved the one button not showing. It would seem that real issue is that the images show on iOS6 and NOT on iOS5.
What worked for me was one (or a combination) of the following 3 things:
Make sure your image file is formatted correctly. Sometimes png files need a little coercing. (I think this specifically was my problem)
Make sure your button is of type Custom in the Interface Builder or UIButtonTypeCustom.
If you are setting the image in Interface Builder and it's still not showing, set it explicitly in the code using [button setBackgroundImage:image forState:UIControlStateNormal] (or [button setImage:image forState:UIControlStateNormal] depending on which one you need.
If you are adding a folder to the copy bundles, then instead of referencing the file as gray_button.png, you should reference if from code or xib You will have to include the directory in the name too such as directory/gray_button.png
Steph,
If you used #synthesize for the button in the .h file, then getters and setters are automatically created. Thus (this is a longshot and just a thought) having the name getMyTripButton could be confusing Xcode somehow. Try renaming the variable?
As far as the image not loading... for one of the buttons and not the other... da faq? Is this the only places that gray_button.png is getting called? (for example, you aren't modifying that button somewhere else that may tell it to use that image again). Have you tried putting it in the same directory as the nib that is using it? are you sure getMyTripButton is properly tied from the nib to the code?
Last thing I can think of for now:
you said
I set the button background in the interface builder, but that wasn't
showing up so I set it programmatically. All (but one button... why?)
shows on the simulator but never show on a device
do you have popupButton's background image also set in the nib/interface builder? if you already have it set there and are setting it again here, it may be that it isn't really getting set in the code at all and is just using what is in interface builder which could explain why getMyTripButton may not be showing up/showing the background image.
If I think of anything else that could be causing the issue i'll edit this post. Good luck, and hang in there.
I am using NSLocalizedString function to change the language of a UIButton
reset.titleLabel.text=NSLocalizedString(#"Reset", nil);
I put this line in the viewDiLoad , viewWillAppear , viewDidAppear , viewDidDisappear and viewWillDisappear
when the View load , the localized version of the text appear , when I click on the button the text change back to the original text that is on the button in the Storyboard and then return to the localized language again right before loading the following view (even the the titlelable never changes values all across these stages!)
I saw that one of the solutions is to have a localized version of the Storyboard but I don t want to do that yest since I will have to maintain all localized versions ... any other solution ?
I would suggest using -setTitle:forState: to change the title. By manually changing the titleLabel.text, you should expect the text to be reset occasionally. Most documentation examples just show manipulating the font size, etc. not the contents, and that is because the titleLabel is set to the currentTitle Since there are multiple states for buttons, iOS has a way to set these where they are stored and to make sure that any image caches are appropriately updated.
[reset setTitle: NSLocalizedString( #"Reset", nil) forState: UIControlStateNormal];
As long as none of the other states are explicitly set, this will be used for all of the states. If you want to change the title for different states, use one of the other state contents.