Question

I’m building a basic calculator app. The calculator is already fully functional with basic features. The problem I’m having is I ran out of room on the screen to add other, more advanced features. Ideally what I would like to do is create some kind of subclass and view that slides up to to the bottom of the label (where the completed calculations are displayed), when a button on the bottom of the screen is pressed. In other words, I want a view with more operators and computation options to slide up to the bottom of the label and I dont want this view to cover up any digits that are being displayed in the label. Is there anyway to achieve this?

Answer 1

Yes, you can. When your button is pressed, create your new view (with the extra functions), add it as a subview to self.view, and animate a change to it’s frame, so that it’s frame changes from below the visible view to just below your digits.

Like this:

-(void) buttonPressed {
 UIView *myNewView = << create your view >>
 myNewView.frame = CGRectMake(0,480, 320,200);  // or whatever your width and height are
    // 480 means it will be below the visible frame.
 [self.view addSubview: myNewView];
 float bottom_Y_of_digit_display = 100;// or wherever it is...

 [UIView beginAnimations:nil contenxt:nil];
 [UIView setAnimationDelay: 0.0];
 [UIView setAnimationDuration: 1.0];  // one second.
 myNewView.frame = CGRectMake(0,bottom_y_of_digit_display, 320,200);
 [UIView commitAnimations];
}