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Matthew Choy
4,928 PointsUIView equals to View?
as far as I know,
1.view= UIView + window 2.view does not equal to UIView
am i right?
and what does it mean by view disappearing and reappear,does it mean like a screen goes black and change to another scene?Thanks.
1 Answer
Abirbhav Goswami
15,450 PointsThe 'View' on your app as in the elements are all instances of UIView. What that means is that it is a UIView.
// For example
@interface Animal : NSObject
@property ( strong, nonatomic ) NSString *name;
@property ( strong, nonatomic ) NSInteger *age;
@end
Now we have a class called Animal. We can now make a variable called 'dog' that is an instance of Animal. Like so:
Animal *dog = [ [ Animal alloc ] init ];
Now we get a variable called dog that is an instance of Animal. Much in the same way, the View in the Interface Builder is just another instance of the UIView class.
Now, the viewDidAppear method is called everytime the view (a single screen, a different screen of your app, or your entire app itself) appears in the foreground. As in, you open it from your home screen, or your recents page, or even changing screens within your app. In the same way, disappearing means when the screen is not in the foreground, and is in the background.
Hope this helps.