Why can't I use the new inline #imageLiteral syntax in Xcode 8? "Expected expression in return result"

Question

I'm trying to use the new #imageLiteral inline image assignment from your assets folder in Xcode 8, where instead of the whole UIImage(named: "") syntax it's just the image displayed, as shown here.

But when I do, I get the error "Expected expression in return result" when it's a function.

Here's a simple example:

func img() -> UIImage {
    return #imageLiteral(resourceName: "small-checkmark")
}

Where in Xcode it displays the small-checkmark as would be expected, but it won't compile due to the above error. Everything is autocompleted for me, the file is in the assets folder (a PDF). I don't understand what's going wrong. If I just return UIImage() it compiles fine.

What should I be doing?

You shouldn't type `#imageLiteral..` just type `return small-checkmark` and Xcode should recognise the completion as you type `sma...` — Paulw11, Oct 12 '16 at 01:00
Okey @DougSmith, remove it. Have you med sure that you double click the image from the intellisense? Your code compiles fine for me. — Rashwan L, Oct 12 '16 at 15:06
@Paulw11 The image literal is what Xcode has behind the scenes, I'm not typing it. — Doug Smith, Oct 13 '16 at 20:03
Sorry, can't help then. your code works for me in a test app. You could try splitting the line in two; assign the,image via a `let` and return the constant — Paulw11, Oct 13 '16 at 20:05

score 6 · Accepted Answer · answered Nov 09 '16 at 02:52

6

You should check Swift Version.

Build Settings > Use Legacy Swift Language Version = NO

Image Literal is only supported on Swift3.0, not Swift2.3.

answered Nov 09 '16 at 02:52

kenmaz

106
4

Ah that's the issue I'm still on 2.3. – Doug Smith Nov 14 '16 at 18:43

score 2 · Answer 2 · answered Oct 05 '18 at 12:46

2

For all having the same problem with Xcode 10 / Swift 4.2 -> Unfortunately, this feature (imageLiterals, auto completion ) was deprecated in its previous form.

But there is new way to use imageLiterals -> https://stackoverflow.com/a/52523111/3143890

answered Oct 05 '18 at 12:46

LukeSideWalker

7,399
2
37
45

Why can't I use the new inline #imageLiteral syntax in Xcode 8? "Expected expression in return result"

2 Answers2

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