Question

I have a UIWebView that is drawn programmatically and gets allocated and displayed through multiple subviews (the webview gets added to the superview).

This all works, however I have one little problem:

If 2 different subviews display this webview then I get 2 webviews, so when 1 view dismisses the webview the other remains. I don’t want this.

Originally I was thinking just implement the webview in the superview class, however it didn’t work.

How can I have the web view check to see if there are more then one of itself?

Answer 1

A webview instance can only be added to the view hierarchy once. If you have two webviews visible on screen at once, they are two different instances. You should keep track of these instances that you add to the hierarchy and when one dismisses, remove all the instances you are tracking from their superview.

You can also crawl a view hierarchy and look for instances of UIWebView.

for (UIView *subView in [myView subviews]) {
    if ([subView isKindOfClass:[UIWebView class]]) {
        [subView removeFromSuperview];
    }
}