Change title of bar button in UIImagePickerController's navigation bar

Question

my question is simple: how can i change change title of bar button in UIImagePickerController's navigation bar? I created the controller for UIImagePickerController (triggered by the pressure onto a button) and then tried to modify its properties:

- (IBAction)chooseFromRoll:(id)sender {

    if ([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeSavedPhotosAlbum]){
        UIImagePickerController *imagePicker =
        [[UIImagePickerController alloc] init];

        imagePicker.navigationBar.tintColor = [UIColor colorWithRed:0.42 green:0.18 blue:0.66 alpha:1.0];
        //imagePicker.navigationItem.title = @"Scegli foto profilo";

        imagePicker.delegate = self;
        imagePicker.sourceType =
        UIImagePickerControllerSourceTypePhotoLibrary;
        imagePicker.mediaTypes = [NSArray arrayWithObjects:
                                  (NSString *) kUTTypeImage,
                                  nil];
        imagePicker.allowsEditing = NO;


        [imagePicker.navigationController.navigationItem.rightBarButtonItem  setTitle:@"Annulla"];
        [self presentViewController:imagePicker animated:YES completion:nil];
    }
}

but nothing changed, only navigation bar was correctly modified.

Here's the code for function willShowViewController:

- (void) navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated{

    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 320, 30)];
    label.textAlignment = 2;
    label.frame = CGRectMake(label.frame.origin.x, label.frame.origin.y, label.frame.size.width-200,label.frame.size.height);
    label.adjustsFontSizeToFitWidth = YES;
    label.font = [UIFont fontWithName:@"Futura" size:15.0];
    [label setFont:[UIFont boldSystemFontOfSize:16.0]];
    [label setBackgroundColor:[UIColor clearColor]];
    [label setTextColor:[UIColor whiteColor]];
    [label setText:@"Scegli foto profilo"];

    [navigationController.navigationBar.topItem setTitleView:label.viewForBaselineLayout];

    [navigationController.navigationBar.topItem.rightBarButtonItem setTitle:@"Annulla"];



}

can you tell me where's the mistake?

thanks

Answer 1

Here is a code snippet for twicking the title of the navigation bar in uiimage picker.

- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated {
UINavigationItem *ipcNavBarTopItem;

// add done button to right side of nav bar
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithTitle:@"Photos"
                                                               style:UIBarButtonItemStylePlain 
                                                              target:self 
                                                              action:@selector(saveImages:)];

UINavigationBar *bar = navigationController.navigationBar;
[bar setHidden:NO];
ipcNavBarTopItem = bar.topItem;
ipcNavBarTopItem.title = @"Photos";
ipcNavBarTopItem.rightBarButtonItem = doneButton;
}

Hope this would help you out.

EDIT:

the answer to first question is yes you can use the ibaction or just use the method i provided above to create the button, both should work. if you are using inaction, make sure you declare you controller within it so you can make it appear and dismiss it from within the action method. the answer to the second question if you want to change the title of the view that is presented when image picker from the photo album is presented then you need to create a new subview and pop it up to allow the user to select the desired image then you can change the title the way i did it above. lengthy process, i would not recommend it. the answer to the third question, try using the following code snippet where you declare your button,

[btn.titleLabel setFont:[UIFont boldSystemFontOfSize:13]];

where the btn is the name of your button and you can modify the font name and the size. i hope my answers can help you. good luck and let me know if you need any more help.