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

Blocks are Objective-C Objects !!!

Blocks Blocks are executable code just like a function.  It can be written inside a function or we can store the reference in a variable and call it later.  But wait a minute these all functionality we can achieve by function pointer and functions.  Then what is so special about blocks? Let first go through how we can define blocks. int (^sum)( int , int ) = ^( int number1, int number2){ return number1+number2; }; The above block can be used to find the sum of two numbers.  If we recall the function pointer in c then it is very much similar to above: int sumFunction ( int number1, int number2){ return number1+number2; } int (*sum) ( int , int ) = sumFunction; //Function Pointer *sum Then Why we need Blocks if we already have Function pointer?  1) B locks can capture variables from the enclosing scope by simply referring to them within the block. How ? Let see the next Section 2)  Blocks...
Post a Comment
Read more