About touch coordinate between iPhone 4s, 5, 6 and 6+

Question

Fyi, I am new to Xcode programming for iOS. I've written a simple game and tested on actual iPhone 4s and is working. As I only own iPhone 4s, I can only simulate my game with iOS simulator for higher iPhone version. The problem I observed for higher iPhone version is that the image is scaled, therefore the touch location is no longer valid.

PS: I do not use any UIButton . I am using CGRectMake to create the button and later declare the touch position as shown below.

-(void) touchBegan: (CGPoint) p 
{
    if (p.x > 0 && p.x < 100 && p.y > 0 && p.y < 30) myscore = 1;
}

So my question is, will the touch displacement seen in the simulator appear the same in the actual device? If yes, does it mean that I need to declare the touch boundary for each iPhone version?

Answer 1

If you want to fix the touch location regardless of the device you're using, the easier way is to, as said before, click and drag a Button on the storyboard and use Auto-Layout to fix the location of the button For instance, you can set the button to appear 10px down and 10px right from the top-left corner from the containing view and it will appear at the same location regardless of the device used. But I'm sure there's a way to programmatically do the exact same thing

PS: wanted to post a comment and not an answer, but I don't have enough rep...

Answer 2

Yes, this will happens in device to. As you comment you can set the bounds for each different device or (i think easier) use a UIButton. Why don't you use it ? Any special reason?