Why are the positions of my nodes different on every device?

Question

Ok, so I've been trying to position a line on my iPhone 6s+ and my iPad 2. The line was added in an SKCamera (I don't know if that effects it or not). Here is the code for the line:

    var leftWall = SKSpriteNode()
    leftWall.size = CGSize(width: 1, height: 10000)
    leftWall.position = CGPoint(x: 0, y: 0)
    leftWall.color = UIColor.red
    leftWall.physicsBody = SKPhysicsBody(rectangleOf: CGSize(width: leftWall.size.width, height: leftWall.size.height))
    leftWall.physicsBody?.affectedByGravity = false
    leftWall.physicsBody?.isDynamic = false
    leftWall.physicsBody?.categoryBitMask = groundGroup
    leftWall.physicsBody?.collisionBitMask = ballGroup
    leftWall.physicsBody?.contactTestBitMask = 0
    theCamera.addChild(leftWall)

Okay, so the x position is 0,0 right? Here is how it looks on my iPhone 6s+: As you see, the line is in the middle?

Here is how it looks on my iPad 2:

I just don't understand why the position of the line is completely different.. Please help me!

It depends on the anchor point of the scene unless that of the node is specifically set. — El Tomato, Jul 01 '17 at 00:01
@ElTomato I have tried setting the anchor point to 0,0 on it but it doesn't change anything. — Josh Schlabach, Jul 01 '17 at 00:12
And why do you want to set the anchor point of the node to 0,0? And what is the anchor point of the scene itself? — El Tomato, Jul 01 '17 at 00:52
if you can make a minimal project replicating this issue and post it then I will try to help you. — Fluidity, Jul 13 '17 at 13:39

score 2 · Answer 1 · answered Jul 01 '17 at 05:11

2

You are not taking into account the cropping that happens on the iPad, or your scaleMode is all wrong

What you need to do is set all nodes anchor points (Including the scene) to (0.5,0.5), make sure your GameScene has a static size and not based on view.frame (750,1334 is a good one) and that your scale mode is set to .aspectFill. This makes (0,0) the center of the screen, and you will notice everything line up on all devices

answered Jul 01 '17 at 05:11

Knight0fDragon

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Knight0fDragon, everything lines up except for the wall for some reason. – Josh Schlabach Jul 02 '17 at 18:54
it seems as if the wall position isnt updating with every device. It always say its x coordinate is 512 on every device – Josh Schlabach Jul 02 '17 at 19:22
why wouldn't it say 512 on every device – Knight0fDragon Jul 02 '17 at 20:57
How do i check if it has a static size – Josh Schlabach Jul 03 '17 at 16:50
by not doing GameScene(view.frame.size) – Knight0fDragon Jul 03 '17 at 16:50
Yeah there's a static size. I did what you told me and it doesnt work. The line is only centered on my iPhone 6s+ and not on any other device – Josh Schlabach Jul 03 '17 at 18:47
I feel like it has something to do with the SKCamera but I'm not sure how to fix it. This is my first time using an SKCamera – Josh Schlabach Jul 03 '17 at 18:55
there is something you are not telling me, because everything I told you would put everything in the center, if it is not in the center, then you did something I do not know about – Knight0fDragon Jul 03 '17 at 18:59
I messed around with some things you told me to do and I'm completely lost. Everything is repositioned differently and the nodes don't resize based on device anymore. Could you help me on teamview or something? – Josh Schlabach Jul 05 '17 at 14:05
wont be able to for at least a few days, upload your project somewhere and I will comment it – Knight0fDragon Jul 05 '17 at 14:20
Are you sure? I'm sure it will take you like 5-10 minutes. I really have no clue how to fix it and I need to finish this project ASAP. – Josh Schlabach Jul 05 '17 at 14:24
well I have multiple jobs and not a lot of free time to be doing some remote desktoping, so yes I am sure – Knight0fDragon Jul 05 '17 at 14:25
What should I upload my project to? Do you need to be able to run the app or just see the code? – Josh Schlabach Jul 05 '17 at 14:27
I would probably want to run the app to be able to test it, just use expirebox – Knight0fDragon Jul 05 '17 at 14:28
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/148426/discussion-between-josh-schlabach-and-knight0fdragon). – Josh Schlabach Jul 05 '17 at 14:53
I notice this is still up for bounty, what problems do you still have? – Knight0fDragon Jul 14 '17 at 14:21
Nothing works to center everything. Do you have time to help me? – Josh Schlabach Jul 18 '17 at 15:09
once you send me your project with the project file I will be able to, before you upload your file, test to see if you can open it. If you can't open it, then I can't open it. – Knight0fDragon Jul 18 '17 at 15:13
Hey did you look at it? I really need the help soon – Josh Schlabach Jul 24 '17 at 13:12
send it again, i didn't look at it and the files are on my work machine – Knight0fDragon Jul 24 '17 at 13:18
Sorry man, I work 2 jobs, I will look at it when I get a chance, Yesterday was the day to get it to me since I took off. – Knight0fDragon Jul 25 '17 at 13:20
If you can't provide a project that builds, then I can't help you – Knight0fDragon Jul 25 '17 at 22:03
Here is a project that works. https://expirebox.com/download/38b22a2055cc2d1734f8e6e5f9611afa.html – Josh Schlabach Jul 26 '17 at 16:33
I don't see a problem. everything is centered – Knight0fDragon Jul 28 '17 at 01:06
On the simulator it's centered but when I run it on actual devices it's not – Josh Schlabach Jul 28 '17 at 13:48
what iOS is your iPad on – Knight0fDragon Jul 28 '17 at 14:55
iPad is on iOS 9 – Josh Schlabach Jul 28 '17 at 15:34
Then my guess is going to be you are using a default anchor point somewhere and not explicitly setting it, causing problems, if I have time I will track it down – Knight0fDragon Jul 28 '17 at 15:43
I have been trying to fix it for a month now and I cannot find it. It centers perfectly on my iPhone 6s+ but not on my iPad 2 and iPhone 5 – Josh Schlabach Jul 28 '17 at 15:45
it centers perfectly on iOS10, not iOS9 – Knight0fDragon Jul 28 '17 at 15:46
this is because of default values, in iOS 9, the default anchor point is (0,0) in iOS 10, it is (0.5,0.5) Some where in your code, you are not explicitly setting it, so depending on the iOS you are on, the anchor point will vary – Knight0fDragon Jul 28 '17 at 15:48
Personally, I would only support iOS 10 up. The percentage of users on 9 is too small to worry about – Knight0fDragon Jul 28 '17 at 15:49
Idk. I think I will only support iOS 10 if you cannot find the anchor point problem. Do you think you can? – Josh Schlabach Jul 28 '17 at 15:50
You can do it if you are in a hurry. Find every sprite, and make sure you set an anchor point – Knight0fDragon Jul 28 '17 at 15:53
Ok. I will work at it. If it doesn't work I'll come back to you. – Josh Schlabach Jul 28 '17 at 15:53
Do I need to set the SkCamera node to 0.5? – Josh Schlabach Jul 28 '17 at 15:53
you have a camera? I think that is bugged in iOS 9 – Knight0fDragon Jul 28 '17 at 15:54
Just set the camera to .5,.5, that may be your problem – Knight0fDragon Jul 28 '17 at 15:55
yes they do have them, I meant set the anchor point to 0,5, 0.5. You may have to verify if you are on 9 or 10, and actually move your camera halfway onto scene with 9 – Knight0fDragon Jul 28 '17 at 17:40

Why are the positions of my nodes different on every device?

1 Answers1