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

Constant Weds Literals Venue Objective C

Arrangement: While working on a application you may have used some predefined values. The visibility of these values can be application level, feature level or class level. For the  convenience  we give name to these values and then use in the application. In this case the name given by you only representing the single value and it never change to represent some other value thats why it is called Constant. On the other hand variables are like us doing jobs in IT World and can switch from one organization( value ) to other. Like while choosing a partner for marriage you may choose best for you by seeing multiple persons and still after sometime you feel stuck. Same may happen you choose a best option to declare a constant and after sometime this constant can create a issue for you in code due to its scope or any other reason. On the other hand you may have a fixed mind that you always declare a constant in a same way in any situation like a love ma...
Post a Comment
Read more

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

Best Practices in iOS with Objective - C

In this post i am making collection of points which i read from some other post or some documentation. Today we will learn what are good or bad habits while doing programming in objective - c. 1) Instance Type and id I noticed one day that in iOS SDK init method of class has  instancetype  as a return value. I am curious to know about this thing and why this type not id. So what i found is following: Example: - ( instancetype )initWithProximityUUID:( NSUUID *)proximityUUID identifier:( NSString *)identifier What is instancetype? Suppose you are writing a method for object initialisation and according to objective c coding convention you need to return the object of same class from the method. So you can use instance type as a return type of method. Instance Type -  It represents the instance of the class or subclass of the class in which you are writing the method with return type instancetype. Confusing ? Let suppose i have declare a class empl...
Post a Comment
Read more