如何使用UIView.hidden属性更改视图的可见性

Question

In my IOS application, I need to show a drop-down menu when the menu button is pressed and hide it when the menu button is pressed again. I tried changing the hidden status to false and true as in the code below however that doesn't seem to work.

if (menuButtonActive == false)
{
    menuButtonActive = true;

    DropMenu.Hidden = true;

}
if (menuButtonActive == true)
{
    menuButtonActive = false;
    DropMenu.Hidden = false;
}

Thanks to anyone that helps!

Answer 1

It's just simple, try this:

In Swift:

yourView.isHidden = true //or false

In Objective-C:

yourView.hidden = YES; //or NO;

In C#:

yourView.Hidden = true; //or false;

In your case you are doing it right, but the problem is you are using only if in both cases. You have to use else if for second if condition in order to achieve the desired result.

Otherwise the second if condition will be always true and get executed you will see no effect of first if block.

For Your Case:

It should be like:

menuButtonActive = !menuButtonActive
DropMenu.Hidden = menuButtonActive

Hope this help you! :)

Answer 2

look at follow code , add a else

if (menuButtonActive == false)
{
    menuButtonActive = true;

    DropMenu.Hidden = true;

}
else if (menuButtonActive == true)
{
    menuButtonActive = false;
    DropMenu.Hidden = false;
}

Answer 3

It must be simple

menuButtonActive = !menuButtonActive;
DropMenu.Hidden = menuButtonActive;