How to center a subview of UIView

Question

I have a UIView inside a UIViewm and I want the inner UIView to be always centered inside the outer one, without it having to resize t

Answer 1

You can do this and it will always work:

child.center = [parent convertPoint:parent.center fromView:parent.superview];

And for Swift:

child.center = parent.convert(parent.center, from:parent.superview)

Answer 2

I would use:

self.childView.center = CGPointMake(CGRectGetMidX(self.parentView.bounds),
                                    CGRectGetMidY(self.parentView.bounds));

I like to use the CGRect options...

SWIFT 3:

self.childView.center = CGPoint(x: self.parentView.bounds.midX,
                                        y: self.parentView.bounds.midY);

Answer 3

Using the same center in the view and subview is the simplest way of doing it. You can do something like this,

UIView *innerView = ....;
innerView.view.center = self.view.center;
[self.view addSubView:innerView];

Answer 4

I would use:

child.center = CGPointMake(parent.bounds.height / 2, parent.bounds.width / 2)

This is simple, short, and sweet. If you use @Hejazi's answer above and parent.center is set to anything other than (0,0) your subview will not be centered!

Answer 5

The easiest way:

child.center = parent.center

Answer 6

You can use

yourView.center = CGPointMake(CGRectGetMidX(superview.bounds), CGRectGetMidY(superview.bounds))

And In Swift 3.0

yourView.center = CGPoint(x: superview.bounds.midX, y: superview.bounds.midY)