I encounter the a problem: I have a view controller like this. TO make tool bar up when the keyboard appear, I move the self.view to up. [self.view setFrame:CGRectMake(self.view.frame.origin.x, self.view.frame.origin.y + keyboardFrame.size.height * (up ? -1 : 1), self.view.frame.size.width, self.view.frame.size.height)]; Now I want to click the left button in the tool bar, and appear the view that frame is same as the this keyboard. But where can I add this view? if add the subview to the self.view, it will move up with the self.view on the top of the keyboard, not cover. I'm a beginner about IOS, I have no idea about it, and have searched, but got nothing about this. another question, IF when the toolbar at the bottom, I aslo want to click the left button on it to show the view(the animation and frame both are the same as the keyboard), how can I do ? Can you help me? Thanks