Skip to main content

iOS8 UIWebView Remove or Modify Keyboard Toolbar

Remove Toolbar:


One of my client requirements is to remove the default toolbar for the keyboard. I found numerous examples for iOS7 to remove toolbar from the keyboard window. But it did not work for iOS8. So i came to following solution after some Research on Google:


Step1:  

First we need to add observer for keyboard notification:

[[NSNotificationCenter defaultCenter]  addObserver:self selector:@selector(removeKeyboardTopBar:) name:UIKeyboardWillShowNotification object:nil];

Step 2:

We need to implement the method for observer:

- (void)removeKeyboardTopBar {
   
}

Step 3:

Find the keyboard window from all the application windows:

 - (void)removeKeyboardTopBar {
   UIWindow *keyboardWindow = nil;
    UIView* toolBarContainer = nil;
    NSArray* windows = [[UIApplication sharedApplication] windows];
    for (UIWindow *possibleWindow in windows) {
        if (![[possibleWindow class] isEqual:[UIWindow class]]) {
            keyboardWindow = possibleWindow;
            break;
        }
    }
}

Step 4:

Find and remove the toolbar:

iOS 7 :

for (UIView *possibleFormView in [keyboardWindow subviews]){
       if ([[possibleFormView description] rangeOfString:@"UIPeripheralHostView"].location != NSNotFound){
                for (UIView *subviewWhichIsPossibleFormView in [possibleFormView subviews]) {
                    if ([[subviewWhichIsPossibleFormView description] rangeOfString:@"UIWebFormAccessory"].location != NSNotFound) {
                        [subviewWhichIsPossibleFormView removeFromSuperview];
                    }
                }
    }
}

iOS 8:

In iOS 8 you cannot remove the toolbar due to some constraint invalidation issue. So you can hide the view as in following example:


for (UIView *possibleFormView in [keyboardWindow subviews]){
         if([[possibleFormView description] hasPrefix:@"<UIInputSetContainerView"]) {
                for(int i = 0 ; i < [possibleFormView.subviews count] ; i++)
                {
                    UIView* hostkeyboard = [possibleFormView.subviews objectAtIndex:i];
                    if([[hostkeyboard description] hasPrefix:@"<UIInputSetHostView"])
                    {
                        for (id temp in hostkeyboard.subviews)
                        {
                            if ([[temp description] hasPrefix:@"<UIWebFormAccessory"])
                            {
                                UIView* currentToolBar = (UIView*)temp;
                                currentToolBar.hidden = true; //hide the view
                                
                            }
                        }
                    }
             }
     }
}

We are done with tool bar remove code. Following is full source code for remove the tool bar and add a new one in place of that. It will work for both the version:

Source Code:

- (void) removeKeyboardTopBar:(NSNotification*)notify{
    // Locate non-UIWindow.
    
    UIWindow *keyboardWindow = nil;
    UIView* toolBarContainer = nil;
    NSArray* windows = [[UIApplication sharedApplication] windows];
    for (UIWindow *possibleWindow in windows) {
        if (![[possibleWindow class] isEqual:[UIWindow class]]) {
            keyboardWindow = possibleWindow;
            break;
        }
    }
    CGRect frm = keyboardWindow.frame;
    CGRect toolbarFrame = CGRectMake(0.0f, frm.size.height, frm.size.width, 44.0f);
    // Locate UIWebFormView.
    for (UIView *possibleFormView in [keyboardWindow subviews])
    {
        if(SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"8.0")){
            if([[possibleFormView description] hasPrefix:@"<UIInputSetContainerView"])
            {
                for(int i = 0 ; i < [possibleFormView.subviews count] ; i++)
                {
                    UIView* hostkeyboard = [possibleFormView.subviews objectAtIndex:i];
                    if([[hostkeyboard description] hasPrefix:@"<UIInputSetHostView"])
                    {
                        for (id temp in hostkeyboard.subviews)
                        {
                            if ([[temp description] hasPrefix:@"<UIWebFormAccessory"])
                            {
                                UIView* currentToolBar = (UIView*)temp;
                                currentToolBar.hidden = true;
                                toolbarFrame = currentToolBar.frame;
                                toolBarContainer = hostkeyboard;
                            }
                        }
                    }
                }
            }
        }else{
            if ([[possibleFormView description] rangeOfString:@"UIPeripheralHostView"].location != NSNotFound) {
                for (UIView *subviewWhichIsPossibleFormView in [possibleFormView subviews]) {
                    if ([[subviewWhichIsPossibleFormView description] rangeOfString:@"UIWebFormAccessory"].location != NSNotFound) {
                        [subviewWhichIsPossibleFormView removeFromSuperview];
                    }
                }
            }
        }
        
    }
    UIToolbar* toolBar = [[UIToolbar alloc] initWithFrame:toolbarFrame];
    if(toolBarContainer){
        [toolBarContainer addSubview:toolBar];
    }else{
        [keyboardWindow addSubview:toolBar];
        
        [UIView animateWithDuration:0.25 animations:^{
            toolBar.frame = CGRectMake(0.0f, 220.0f, toolbarFrame.size.width, toolbarFrame.size.height);
        }];
        
        toolBar.frame = CGRectMake(0.0f, 0.0f, 320.0, 44.0f);
        
        UIView *v = [[keyboardWindow subviews] objectAtIndex:0];
        [v addSubview:toolBar];
    }
    
    
    keyboardWindow = nil;
}

Comments

Post a Comment

Popular posts from this blog

Implement orientation modes in iPhone Hybrid Applications

Let suppose you are working on a hybrid application which runs only in single (portrait) mode. One day a requirement come that PDF and Doc Viewer (HTML Page) should support both (landscape, portrait) mode. Your Application loads all the HTML content from the local html files and you need to implement the above functionality only for one HTML file. Let break the above task in the modules: Step 1: Application should detect when the PDF and Doc viewer is open in application. I setup location.href tag in html to " docvieweron:// " and " docvieweroff:// " when page is open and closed respectively. In this way I am getting a delegate callback in web view: WebViewDelegate: - ( BOOL ) webView:( UIWebView *)webView shouldStartLoadWithRequest:( NSURLRequest *)request   navigationType: ( UIWebViewNavigationType )navigationType {          NSString * urlString = [[request URL ] absoluteString ];...
Post a Comment
Read more

NSThread with Asynchronous Request

NSThread: It is class used in Cocoa framework to create a thread.You have to specify a target and selector to create a new thread in objective c. So the selector or method is main entry point of your thread.  Detail: What happen once the thread execute all the code in the method (Thread main routine)? Thread is terminated after execute all the code in the entry(its main routine) routine. So how we can run an asynchronous request on NSThread ? What is Async request? It is non blocking request which permit the application to do other task side by side as request is in continue. So it enhance parallelism in the application. Now question is how we can prepare a asynchronous request in iOS: - ( void ) startAsyncRequestWithUrl:( NSString *)urlString{     assert (urlString != nil && urlString. length > 0 );     NSURL * url = [[ NSURL alloc ] initWithString :urlString];     NSURLRequest * urlRequest = [[ NSURLReq...
Post a Comment
Read more