Detecting iPhone 6/6+ screen sizes in point values

Question

Given the newly announced iPhone 6 screen sizes:

iPhone 6: 1334h * 750w @2x (in points: 667h * 375w)
iPhone 6+: 1920 * 1080 @3x (in points: 640h * 360w)
         


        

Answer 1

All three devices have (pretty much) the same number of points per inch. So your images will automatically be the same physical size.

Use [[UIScreen mainScreen] bounds] to get the total number of points on the screen. Divide by 163 to get the approximate size in inches if you really want it.

Notice that the 6+ does not return 1080p because it doesn't render to a 1080p buffer. It renders such that output is approximately 160 points per inch, using @3x assets.

No need to second guess.

E.g. if you write this code:

UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 163, 163)];
view.backgroundColor = [UIColor redColor];
[self.view addSubview:view];

You'll get a view that is pretty much the same physical size — one inch square — on all iOS devices.

Apple has already done the hard work, so you don't have to.