What types / sizes of images do you need when using full-screen UIImage?

Question

I am targeting iOS8 to release the application. Thus, it will be available on 4, 5, 6, 6 and iPad 2+.

I have a ViewController where I present a UIImageView , i.e. the entire size of my UIViewController View.

My question is: what sizes do I need for the image. Will I need a special size for each device? Or does 4s / 5/6 use the same coefficients, while 6+ has its own unique coefficient? Or am I just using 1 image size and letting it automatically scale it (or does it stretch / distort the image)?

Also, what is the minimum image size? If it is smaller than the iPhone 6+’s own size, will the image quality deteriorate?

Answer 1

In iOS8, you can use different size classes for different screens

use post to get started.

Also see this for more information on using different graphics for different resolutions.

Answer 2

you need a special size for each device using image.xcassets. And that will help you a lot - https://developer.apple.com/library/ios/documentation/UserExperience/Conceptual/MobileHIG/IconMatrix.html

Answer 3

The image in Imageview on 4s / 5/6 displays at @ 2x, while in 6+ it displays at @ 3x. Get the image and name it as [e-mail] and another image for 6+ with a higher resolution, name it [e-mail]. When the image is placed in the image, it will automatically take [e-mail] for 4s / 5/6 and [e-mail] for 6+.