How do I create a CGRect from a CGPoint and CGSize?

Question

I need to create a frame for a UIImageView from a varying collection of CGSize and CGPoint, both values will always be different depending on user's choices. So how can I make a CGRect form a CGPoint and a CGSize? Thank you in advance.

Solution 1

Two different options for Objective-C:

CGRect aRect = CGRectMake(aPoint.x, aPoint.y, aSize.width, aSize.height);

CGRect aRect = { aPoint, aSize };

Swift 3:

let aRect = CGRect(origin: aPoint, size: aSize)

Solution 2

Building on the most excellent answer from @Jim, one can also construct a CGPoint and a CGSize using this method. So these are also valid ways to make a CGRect:

CGRect aRect = { {aPoint.x, aPoint.y}, aSize };
CGrect aRect = { aPoint, {aSize.width, aSize.height} };
CGRect aRect = { {aPoint.x, aPoint.y}, {aSize.width, aSize.height} };

Solution 3

CGRectMake(yourPoint.x, yourPoint.y, yourSize.width, yourSize.height);

Comments

[Besi]

What kind of operator are you using here in your second example?

[Lomithrani]

Just the normal assignment operator.

[Besi]

I mean the curly brackets. Is this some sort of macro. I know about the native NSDictionary @{} and NSArray @[] operator but this one looks new to me.

[Lomithrani]

It's a compound literal. They are part of C, standardised in C99.

[Pion]

In XCODE 5 it raises: expected expression. This is correct syntax: (CGRect){aPoint, aSize}

[Lomithrani]

@Pion: No it doesn't. That code works fine and doesn't produce any warnings in the latest version of Xcode. I'm assuming you're using different code, doing something other than initialising a local variable. You need the cast if you want to do something like pass a compound literal as a method argument, but just for initialising a local variable, you don't need the cast.

[Pion]

I'm passing as argument so thats the answer ;)