Greetings,
In one of my projects I wanted to create back type button(with pointer) in the navigation bar, I googled around and found that using the following code, it can be achieved.
UIButton *someButton = [UIButton buttonWithType:101];
UIBarButtonItem *someBarButton = [[UIBarButtonItem alloc] initWithCustomView:someButton];
I want to upload this app on Apple's app store.
Is there any chance that this will get my app rejected, since buttonWithType:101 is not documented any where?
Also i m not using this bar button item in its generic way, i.e. it wont pop the view controller.
Please guide.
Regards,
I propose that you generate Image for your need, just by running this code and delete it after you generate the image:
- (void)viewDidLoad {
...
someButton = [UIButton buttonWithType:101];
UIBarButtonItem *someBarButton = [[UIBarButtonItem alloc] initWithCustomView:someButton];
self.navigationItem.leftBarButtonItem = someBarButton;
...
}
and
- (void)viewWillAppear:(BOOL)animated {
....
UIImage *img1 = [someButton backgroundImageForState:UIControlStateNormal];
NSData *newData = UIImagePNGRepresentation(img1);
NSFileManager *fileManager =[NSFileManager defaultManager];
BOOL filecreationSuccess = [fileManager createFileAtPath:#"/Users/macbookmac/Desktop/tester.png" contents:newData attributes:nil];
...
}
most probably yes.. in some cases, few things do slip under the radar, but why take chances..
if you are doing this for your client/company, would you risk having a rejection from app store on your hands..
its safer to create a pointed button image and use it with custom button...
If you are trying to control what text appears in the Navigation controller's back button, you can do that with the UIViewController's UINavigationItem. It can contain both the title for the current view and the text to use for the next view's "back" button. This can be set in XIB as well.
Related
I'm updating some old code, and to make more room in a toolbar, I'm converting the Buttons from test to images. An example of the new and old code in loadView is this:
// New code, doesn't work.
UIButton *toggleKeyboardBtn = [UIButton buttonWithType:UIButtonTypeCustom];
toggleKeyboardBtn.bounds = CGRectMake( 0, 0, showKeyboardImage.size.width, showKeyboardImage.size.height );
[toggleKeyboardBtn setImage:showKeyboardImage forState:UIControlStateNormal];
UIBarButtonItem *toggleKeyboardItem = [[UIBarButtonItem alloc] initWithCustomView:toggleKeyboardBtn];
[toggleKeyboardItem setTarget:self];
[toggleKeyboardItem setAction:#selector(toggleKeyboard:)];
// Original code, works jut fine.
UIBarButtonItem *setupItem = [[[UIBarButtonItem alloc] initWithTitle:#"Setup" style:UIBarButtonItemStyleBordered target:[UIApplication sharedApplication].delegate action:#selector(showSetupView:)] autorelease];
My new code is copied from Cannot set action on UIBarButtonItem, and I'm fairly certain that I'm not making their mistake since my text button is working just fine.
showSetupView() is in my AppController.m file, and the setup screen appears and disappears as the button is pressed.
toggleKeyboard(), OTOH, is in the same file as the loadView() routine, and currently consists of this code:
//- (void)toggleKeyboard {
- (IBAction)toggleKeyboard:(id)sender {
NSLog(#"Entering toggleKeyboard()...");
hiddenKeyboard = !hiddenKeyboard;
[self prepareToolbarsAndStatusbar];
}
Needless to say, although I see the button-press animation, I never see the NSLog message. And one last observation, made by accident. Changing the setAction selector to this:
[toggleKeyboardItem setAction:#selector(noSuchRoutine:)];
compiles cleanly, possibly indicating that my routine name is being ignored for some reason.
Anyone have any ideas? Thanks.
I found the answer! In button action not responding iphone, it's said that the action and target need to be set on the UIButton, not the UIBarButtonItem. I don't know if that's new with the latest version of Xcode, but I guess it is since other questions (such as the one I mention above) use a different technique. Here's my new code:
UIButton *toggleKeyboardButton = [UIButton buttonWithType:UIButtonTypeCustom];
toggleKeyboardButton.bounds = CGRectMake( 0, 0, keyboardAddImage.size.width, keyboardAddImage.size.height );
[toggleKeyboardButton setImage:keyboardAddImage forState:UIControlStateNormal];
[toggleKeyboardButton addTarget:self action:#selector(toggleKeyboard) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *toggleKeyboardItem = [[UIBarButtonItem alloc] initWithCustomView:toggleKeyboardButton];
//[toggleKeyboardItem setTarget:self];
//[toggleKeyboardItem setAction:#selector(toggleKeyboard:)];
Though its too late, but for future references, I would like to quote apple docs for the method,
- (instancetype)initWithCustomView:(UIView *)customView;
The bar button item created by this method does not call
the action method of its target in response to user interactions.
Instead, the bar button item expects the specified custom view to
handle any user interactions and provide an appropriate response.
Did you try
-(void)toggleKeyboard
and
[toggleKeyboardItem setAction:#selector(toggleKeyboard)]; without :
and it made any difference? Is the method declared in the interface file?
I am trying to change images of my tabbar in a ViewController, but to display the new images, I must click on each tab bar item.
for (CustomTabBarItem *myItem in self.tabBarController.tabBar.items){
myItem.enabled = YES;
myItem.badgeValue = #"1";
UIImage *myImage = [[UIImage alloc] initWithContentsOfFile:[[DesignManager sharedManager] getPathOfFile:#"test.png"]];
*myItem.imageSelect= *myImage; // change images of each item. don't appear if I dont click on the item
}
Anyone know How can I can display directly these images?
Thanks
You need to replace the old tab bar item with a new one. You can't update the image dynamically otherwise.
The easiest way to do this is to set the tabBarItem property of the view-controller represented by a given tab. If you wanted to do this from within that view controller, just write:
self.tabBarItem = [[UITabBarItem alloc] initWithTitle: #"title" image: myImage: tag: nil];
Or, you could do this from somewhere else, say your app delegate:
UIViewController* vc = [tabBarController.viewControllers objectAtIndex: 3];
vc.tabBarItem = [[UITabBarItem alloc] initWithTitle: #"title" image: myImage: tag: nil];
I know this is an old question. I ran into the same problem when I need to update the badge value from another active tab. Creating another UITabBarItem will solve your current problem but causes potential memory leak when this code is called many times. Plus, when other view controllers access the tab, they do not have reference to newly created UITabBarItem. My trick is
vc.tabBarItem = vc.tabBarItem;
It works for me.
I'm creating a small iPhone app, when application lauches, it will ask the user to sign up or Login. If they choose sign up safari will open. This part is done.
////button code
button = [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain];
button.frame = CGRectMake(10, 150, 300, 50);
[button setTitle:#"Login" forState:UIControlStateNormal];
button.backgroundColor = [UIColor clearColor];
[button addTarget:self action:#selector(myaction:) forControlEvents:UIControlEventTouchUpInside];
button.adjustsImageWhenHighlighted = YES;
[mainView addSubview:button];
[button release];
If they click Login -
How to navigate to next window asking for username / password ? Can I do it button action ?
2.How I will store their info in plist ( if i'm correct ) ?
Thanks in advance.
One way to do (1.) is:
define a LoginViewController class that inherits from UIViewController
create a nib file named "login" with the UI elements for your login view
make your login button action do somehting like:
LoginViewController *controller = [[LoginViewController alloc] initWithNibName:#"login" bundle:nil];
[self presentModalViewController:controller animated:NO];
There are really several different questions here disguised as one.
1: in the method -buttonAction is where your navigation logic will be. It looks like you're probably working from xibs out of Interface Builder
2: You'll need to use the NSDictionary method called -writeToFile:atomically:. The arguments are the path string for the file to be stored on flash memory, and a BOOL YES/NO value that determines if the file is written immediately, or if it checks for errors first. I'd recommend setting atomically: to YES.
I'm gathering from your question that you're not familiar with Cocoa and UIKit. You'll be hard pressed to get a tutorial on how to put your application together. You're going to need to try Google for swapping views and handling page navigation. It's a lot deeper than what I'm describing here.
I have a UIToolbar that I set up using IB with three buttons, left, middle and right. In some situations I would like to not display the middle button. Does anybody know of a way to hide a specific button on inside a UIToolBar? There is no hide property, all I can find is setEnable but this still leaves the button causing users to wonder what its purpose is. I would like to only display it in situations that it actually has a use.
Thanks in advance!
Reset the items:
-(void)setItems:(NSArray *)items animated:(BOOL)animated
You can get the current items using the items property, then just remove the one you don't want to show and pass in the new NSArray.
As you can see, you can also animate it to make it clear to the user.
Rather than guessing at the index, I added an IBOutlet for the UIBarButtonItem and then removed it by name:
NSMutableArray *toolBarButtons = [self._toolbar.items mutableCopy];
[toolBarButtons removeObject:self._selectButton]; // right button
[self._toolbar setItems:toolBarButtons];
And of course it helps to connect the outlets in the designer :)
This is how i did it.. too much headache but its the best i could come up with :
NSArray *toolBarArray = toolBar.items;
NSMutableArray *newToolBarArray = [NSMutableArray arrayWithArray:toolBarArray];
[newToolBarArray removeObjectAtIndex:2];
[newToolBarArray removeObjectAtIndex:1];
//remove whatever buttons you want to.
NSArray *finalTabBarArray =[[NSArray alloc] initWithObjects:newToolBarArray, nil];
[toolBar setItems:[finalTabBarArray objectAtIndex:0] animated:NO];
I know it is quite old thread for but those who look this page for solution, here you go :
With iOS7, you can use this approach to show/hide your toolbar button :
if(// your code Condition)
{ self.toolbarBtn1.enabled = YES;
self.toolbarBtn1.tintColor = nil; }
else
{ self.toolbarBtn1.enabled = NO;
self.toolbarBtn1.tintColor = [UIColor clearColor]; }
This does not work here because the array you are sending with setItem is not what the function expects.
I had to replace the line:
NSArray *finalTabBarArray = [[NSArray alloc] initWithObjects:newToolBarArray, nil];
with this one:
NSArray *finalTabBarArray = [newToolBarArray copy];
Then it works perfectly.
Mohit's answer is one that I have used, but you dont need to specifically make it a NSArray that the toolbar sets. You can just set the array of items as a NSMutableArray. No real advantage that I am aware off but its a few lines less code. And that way you can take the array and move about UIButton objects as you would any other array with objects and then just reset the toolbar with that mutable array.
[newToolBarArray removeObjectAtIndex:2];
[newToolBarArray removeObjectAtIndex:1];
[toolBar setItems:newToolBarArray];
Is it possible to make calls to navigationItem on a UIImagePickerController? Specifically, the image picker? Below I've linked an image of what I'm trying to achieve ( screen shot taken from another app doing the same thing). Once the user selects an image from the picker the navigationItem.prompt is set and, though I think it might be a HIG violation, the right bar button is changed from the standard cancel button. I can set the prompt on a "normal" view no problem with:
self.navigationItem.prompt = myString;
But this does not seem to work when I try to use it in the context of a picker with:
myPicker.navigationItem.prompt = myString;
I've tried using it when the picker is created and also in didFinishPickingMediaWithInfo: which is really where I need to set it as I'm letting the user select multiple images instead of dismissing the picker as soon as one image is selected. Nothing seems to work.
Here's a image of the desired behavior:
http://i51.photobucket.com/albums/f353/zoso5th/after.png
Someone answered this for me on the Apple dev forums:
UINavigationBar *bar = picker.navigationBar;
UINavigationItem *navItem = bar.topItem;
navItem.prompt = #"Some new prompt";
I wasn't correctly accessing the navbar.
Someone answered this for me on the Apple dev forums:
UINavigationBar *bar = picker.navigationBar;
UINavigationItem *navItem = bar.topItem;
navItem.prompt = #"Some new prompt";
I wasn't correctly accessing the navbar.
Use the code after calling 'presentModalViewController'.....like below...
[controller presentModalViewController:imagePickerController animated:YES];
UINavigationBar *bar = picker.navigationBar;
UINavigationItem *navItem = bar.topItem;
navItem.prompt = #"Some new prompt";