uiviewcontroller don't respond

I have a view, with a navigationBar on top. I add a subview in this view. My subview is a view with a toolBar.

SecondView.frame = CGRectMake(0, 418, 320, 42);

[principalView addSubview:SecondView];
[principalView bringSubviewToFront:SecondView];

After that, the subView is in my principalView, at the right place, but when I click in the subView, nothing happen.

But, if my navigationBar is like this, all works perfectly,

self.navigat开发者_Go百科ionController.navigationBar.barStyle = UIBarStyleBlackTranslucent;

Why the subview do nothing if my navigationBarStyle is UIBarStyleDefault.

I think your SecondView has fallen out of your principalView bounds. If that's the case, it will still be visible because principalView does not clip subviews, but SecondView will not respond to user action. You should check the principalView.bounds property against SecondView.frame.

I recommend just using Interface Builder to do this. Also, normally you don't use navigation bars by themselves. Normally if you have a navigation bar you should use a UINavigationController and push view controllers onto that.