iPhone 3.5 Inch screen - 4 inch screen:

Question

I know you can choose ipad or iphone by using an if statement with UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad. But I was wondering if you could do the same for iPhone 3.5 inch screen to iPhone 4 inch screen. I have a game which was originally designed for the iPhone 4 inch screen, but auto layout has been used to fix the errors between the two devices, the one thing I need to change is that when

if (ball.center.y > 600) {
    RandomPosition = arc4random() %248;
    RandomPosition = RandomPosition + 36;
    ball.center = CGPointMake(RandomPosition, -22);
}

Because it was originally designed on the 4 inch screen, the game is set up to reset the ball to the top of the screen when it is > 600 pixels, which is just below the iphone 4 inch screen. It still functions properly, there is just a bit of a delay between the bottom of the 3.5 inch screen and the resetting of the position. Is there anyway I could set up an if statement with UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiom(iphone4???) to set up a new ball.center.y > 300 or something?

Answer 1

You can try following code. Add this code in Constant.h

#define IS_IPAD (( UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad ) ? YES : NO)
#define IS_IPHONE_5 (([UIScreen mainScreen].scale == 2.f && [UIScreen mainScreen].bounds.size.height == 568)?YES:NO)
#define IS_RETINA_DISPLAY_DEVICE (([UIScreen mainScreen].scale == 2.f)?YES:NO)

Now to check the device size add the following code in your Views

if (IS_IPAD)
{
       //do stuff for iPad
}
else
{
     if(IS_IPHONE_5)
     {
        //do stuff for 4 inch iPhone screen
     }
     else
     {
        //do stuff for 3.5 inch iPhone screen
     }

}