Combine two CGRect

Question

Is there any way to combine two CGRect? I want to add "y: 65.0" to an existing CGRect and can't seem to find any way to do it. Sounds like a simple task to me but seems impossible to do in Xcode since "+=" isn't allowed between CGRect's.

EDIT: Tried using offsetBy and adding them using the following code. When adding the CGRect's i get the error message: No '+' candidates produce the expected contextual result type 'CGRect'

    var fromRect:CGRect = self.tableView.rectForRow(at: indexPath)
    let addRect = CGRect(x: 0.0, y: 65.0, width: 0.0, height: 0.0)

    //fromRect.offsetBy(dx: 0, dy: 65.0)
    fromRect = fromRect + addRect

Possible duplicate of http://stackoverflow.com/questions/30533937/can-you-combine-cgrects-with-each-other-in-swift ? But I'm not sure if it works for Swift 3. — Eric Aya, Nov 04 '16 at 15:42

Stormsyders · Accepted Answer · 2016-11-04T16:05:15.263

0

Or maybe you could just implement an operator yourself :

func +(left: CGRect, right: CGRect) -> CGRect {
    let origin = CGPoint(x: left.origin.x + right.origin.x, y: left.origin.y + right.origin.y)
    let size = CGSize(width: left.size.width + right.size.width, height: left.size.height + right.size.height)
    return CGRect(origin: origin, size: size)
}

func +=(left: inout CGRect, right: CGRect) {
    left = left + right
}

but there is a simpler solution to that problem without using operators: Just do this: (I'm not sure about this part because it seems that you want to do something more complex ?)

rect.origin.y += 65

edited Nov 04 '16 at 16:05

answered Nov 04 '16 at 15:52

Stormsyders

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2
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What would this operation mean in a 2D plane? There is `CGRectIntegral` which I understand, but this not really. – Léo Natan Nov 04 '16 at 15:57
This is in the first place a solution to his answer, he can now do rect += CGRect(x: 0, y: 65.0, width: 0, height: 0) – Stormsyders Nov 04 '16 at 15:59
Yes, that's why I didn't downvote the answer. I think the question is bad. – Léo Natan Nov 04 '16 at 16:00
But you make me think that there is a simpler solution, I just get influenced by the "+=" in the question to be honest lol – Stormsyders Nov 04 '16 at 16:00
Used the '+' func and it worked! Thanks @Stormsyders – stackoverflowlivesmatter Nov 05 '16 at 22:51

score 0 · Answer 2 · answered Nov 05 '16 at 01:44

0

If you are wanting to literally add an offset to a rect's position, as in your example of adding y:65, you can use rect.offsetBy(dx: 0, dy: 64).

answered Nov 05 '16 at 01:44

charmingToad

1,597
11
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Doesn't work for me for some reason. Code i have tried: var fromRect:CGRect = self.tableView.rectForRow(at: indexPath) let addRect = CGRect(x: 0.0, y: 65.0, width: 0.0, height: 0.0) //fromRect.offsetBy(dx: 0, dy: 65.0) romRect = fromRect + addRect When i'm trying to use the last line of code i get the error "No '+' candidates produce teh extended contextual result type 'CGRect' – stackoverflowlivesmatter Nov 05 '16 at 22:37
I'm not sure what you are doing in your last line. If you are trying to offset a rect by 65 y, then let newRect = fromRect.offsetBy(dx: 0, dy: 65.0). You can't use the "+" operator on rects. The offsetBy function can be used to add to the X or Y position of a rect. – charmingToad Nov 07 '16 at 17:16

Combine two CGRect

2 Answers2