CODEWITHSUNDEEP
iphoneiosxcodeviewobjective-c++
Edward Anthony
Edward Anthony

Reputation: 3464

( iOS ) What is superview and what is subviews

What is superview and what is subviews?

When I add this code:

[self.view addSubview:self.frontView];
// what does that mean ?

And...

@property (nonatomic, strong) IBOutlet UIImageView *frontView;
[self.frontView superview] != nil // means ?

what is in superview?

Upvotes: 6

Views: 17177

Answers (4)

Mohammad Kamar Shad
Mohammad Kamar Shad

Reputation: 6067

A superview is a view that holds other views over it and subviews are the views being held/added over a View.

Let's assume we have a view named MyView, which holds a UIButton (named loginButton) over it. Here MyView is considered a superview for loginButton and loginButton is considered a subview of MyView.

For more, you should start from here

As per the provided code snippet.

[self.view addSubview:self.frontView];

Hence view (Controller's view) is a superview and frontView is a subview

Upvotes: 21

abhishekkharwar
abhishekkharwar

Reputation: 3529

subview is childview ( which is added on any view)

superview is parentview (on which subview is added)

Upvotes: 1

Ivan Surzhenko
Ivan Surzhenko

Reputation: 149

"superview" means the view which holds the current one. "subviews" means the views which are holding by the curent view.

For example, you have a view (will call it as MyView) which include a button. Button is a view too (UIButton is a kind of view). So, MyView is superview for the button. Button is a subview for MyView.

Upvotes: 5

trojanfoe
trojanfoe

Reputation: 122458

See Apple's View Programming Guide, section View Hierarchies and Subview Management

Upvotes: 1

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