Question

I need to create a rich text editor (for text alignment, fonts, bold, italics, underlining etc) for an iPhone app. I have heard of storing the data as HTML and rendering it in a UIWebView. I want to allow the user to edit the data and in my app I am using TapDetectingWindow to detect touches on a UIWebView (exactly as detailed here).

- (id)init {
    self = [super init];
    if (self) {
          tapDetectingWindow = (TapDetectingWindow *)[[UIApplication sharedApplication].windows objectAtIndex:0]; //mWindow, variable reference to TapDetectingWindow
        tapDetectingWindow.viewToObserve = webView;  
        tapDetectingWindow.controllerThatObserves = self;    

        webView = [[UIWebView alloc] init];
        [webView setFrame:CGRectMake(0, 0, 340, 1900)];
        [webView setTag:1];
        [webView addSubview:keyboardText];
        [webView setDelegate:self];
        [webView setOpaque:0.0];

        [webView loadHTMLString:htmlString baseURL:NULL];
        [self.view  addSubview:webView];

        keyboardText = [[UITextField alloc] init];
        keyboardText.autocorrectionType = UITextAutocorrectionTypeNo;   
        [keyboardText setDelegate:self];
        [self.view addSubview:keyboardText];
    }
    return self;
}

But my app is crashing, with the message

tapDetectingWindow.viewToObserve = webView

and a report

* -[UIWindow setViewToObserve:]: unrecognized selector sent to instance 0x4a26b90 

Answer 1

After a few hours of hair pulling, here’s the answer: you need to edit your AppDelegate’s .m file to get the TapDetectingWindow to work properly:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    UIViewController* vc = self.window.rootViewController;
    self.window = [[TapDetectingWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    self.window.rootViewController = vc;

    return YES;    
}

I tried this and it’s working perfectly with the rest of the TapDetectingWindow tutorial!