UIBarButtonItem: How can I find its frame?

Question

I have a button in a toolbar. How can I grab its frame? Do UIBarButtonItems not have a frame property?

Answer 1

Here's the way to do it:

-(CGRect)findFrameOfBarButtonItem{
    for (UIView *view in self.navigationController.navigationBar.subviews)
    {
       if ([view isKindOfClass:NSClassFromString(@"_UINavigationBarContentView")])
       {
         UIView * barView = [self.navigationItem.rightBarButtonItem valueForKey:@"view"];
         CGRect barFrame = barView.frame;
         CGRect viewFrame = [barView convertRect:barFrame toView:view];
         return viewFrame;
       }
    }

    return CGRectZero;
}

Answer 2

I used a view on the bar button item with a tag on the view:

for view in bottomToolbar.subviews {
   if let stackView = view.subviews.filter({$0 is UIStackView}).first {
       //target view has tag = 88
       if let targetView = stackView.subviews.filter({$0.viewWithTag(88) != nil}).first {                                
          //do something with target view
   }
}

}

Answer 3

Swift 4 up The current best way to do it is to access its frame from :

self.navigationItem.rightBarButtonItems by

let customView = navigationItem.rightBarButtonItems?.first?.customView // access the first added customView

Accessing this way is safer than accessing private api.

• check out the answer in this :

After Add a CustomView to navigationItem, CustomView always return nil

Answer 4

This way works best for me:

UIView *targetView = (UIView *)[yourBarButton performSelector:@selector(view)];
CGRect rect = targetView.frame;