CODEWITHSUNDEEP
iosswift
Steve
Steve

Reputation: 732

How to center movie player programmatically?

I need movie player to be centered vertically.

moviePlayer.view.frame = CGRect(x: ???, y: self.view.frame.size.height/4, width: 200, height: 200)

I've tried self.view.frame.size.width/2 and self.view.center.x. How can i do it ?

Upvotes: 0

Views: 91

Answers (2)

Antonio
Antonio

Reputation: 1038

Here are two programming idioms that you can use for centering a subview within it's super view. If you are writing a custom view, this code should go in that view's layoutSubviews method. If this is part of a view controller, it should go in its viewDidLayoutSubviews method.

Method 1: Setting the center

CGFloat x = CGRectGetMidX(superview.bounds);
CGFloat y = CGRectGetMidY(superview.bounds);
subview.center = CGPointMake(x, y);

Method 2: Setting the frame

CGFloat width = (... calculate subview width ...);
CGFloat height = (... calculate subview height ...);
CGFloat x = (CGRectGetWidth(superview.bounds) - width) / 2.0;
CGFloat y = (CGRectGetWidth(superview.bounds) - height) / 2.0;
subview.frame = CGRectMake(x, y, width, height);

Upvotes: 1

Sergii Martynenko Jr
Sergii Martynenko Jr

Reputation: 1407

You can just set center property after setting frame. 

moviePlayer.view.center = self.view.center;

One more to consider - if moviePlayer.view is a subview of self.view, don't use self.view.frame. Consider using self.view.bounds instead.

To center vertically

CGPoint center = self.view.center;
center.y = //whatever you need
moviePlayer.view.center = center;

Update

As @Antonio mentioned, it works only if self.view's top left corner is screen left top corner itself.

Better way

CGPoint center = CGPointMake(CGRectGetMidX(self.view.bounds), <#Whatever you need#>);
moviePlayer.view.center = center;

But still, I suggest using NSLayoutConstraints for greater good =)

Something to consider

However, setting frames that way isn't the best - you will be forced to calculate each view's position and size manualy. If your layout is plain, use autoresizingMask and contentMode. Like that

//after setting moviePlayer.view.frame
moviePlayer.view.autoresizingMask = UIViewAutoresizingNone;
self.view.contentMode = UIViewContentModeCenter;

In case, your content isn't simple enough, use NSLayoutConstraints. Also, using it you can center only by one axis (vertically or horizontally)

Upvotes: 1

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