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garethdn
garethdn

Reputation: 12351

What happens if @2x image is available but not regular resolution image?

I'm wondering what will happen on a non-retina display device if only the @2x image is copied to the resources? Will it scale down the retina display image by 0.5 to accommodate the frame of the UIImageView?

I hope this isn't a silly question!

Upvotes: 2

Views: 563

Answers (2)

Anne
Anne

Reputation: 27073

The high resolution @2x images are not automatically down-sampled on non-retina devices.

Apple did not implement such feature because non-retina devices generally don't have enough memory to load and down-sample many high resolution images during initialization, it might cause trouble in case too many images need to be initialized.

EDIT (Based on answer by WendiKidd)

Non-retina devices will however down-size and display the high resolution @2x images, but without down-samling them, which causes poor image quality.

Upvotes: 7

WendiKidd
WendiKidd

Reputation: 4373

I know for a fact that it will use the @2x images if no regular image is available, because I have tested it myself. (Though I agree with David's comment--this is rather easy to test yourself.) Now the image quality is decreased, because it's trying to resize an image that is much larger than the space you're trying to put it in. But it absolutely will work. Go give it a try and you'll see :)

Upvotes: 0

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