alertToolBar.barStyle = UIBarStyleBlack;
That should give the iOS 7 Blur that you are looking for. Don't tint the toolbar, just set the tool bar style.
Question
i'm trying to change color of a UIToolbar above the keyboard, but I can not recreate the color black semi transparent keyboard, i have tried this:
alertToolBar.barTintColor = [UIColor colorWithRed:0.0f green:0.0f blue:0.0f alpha:0.5f];
but this is the result:
Solution
alertToolBar.barStyle = UIBarStyleBlack;
That should give the iOS 7 Blur that you are looking for. Don't tint the toolbar, just set the tool bar style.