简单的uiview更改不起作用

Question

I am trying to just do a simple view change for proof of concept.

here is the code

- (void)swipedScreen
{
    if (self.secondView.superview == nil) {
        [myView removeFromSuperview];
        [self.view insertSubview:secondView atIndex:0];
    }
}

when I swipe the screen what happens is the view area just goes black... and becomes unresponsive.

I started with a navigatoin app, replaced the tableview with just a standard uiviewcontroller class.. that worked fine..Then i added a secondView (xib only) and changed its class to match the viewcontroller of the first view.

The reason I am finding this difficult is because i am trying to animate the views inside the navigation controller and not push a whole view onto the stack which I am used to doing.

Answer 1

I'll bet that blank unresponsive view is, in reality, your secondView object. I always test by setting [secondView setBackgroundColor:[UIColor greenColor]] and checking if the massive green rectangle actually shows up.

EDIT: having looked at your code, there are multiple problems that arose:

1. You never actually +alloc or -init anything.
2. You never actually touch those nibs or make a reference to them in code
3. You declare two UIView's as IBOutlets and Strong (two exact opposites, as IBOutlets are __weak, __unsafe_unretained, or assign), yet do not link them to anything.

I've taken the liberty of revising it (sans nibs). Take a look .

Answer 2

Did you init the secondView? if init,you can try to set frame for the secondView

Answer 3

Your inserting the view at the bottom of the stack,

[self.view insertSubview:secondView atIndex:0];

Try using addSubview instead. Also you need to set the views frame somewhere.