How to fix warning "CoreUI: RunTimeThemeRefForBundleIdentifierAndName() couldn't find Assets.car in bundle with identifier: '(null)'"?

Question

I am trying to test app on the iOS 13 beta. When I tap a button on my welcome screen to segue to another screen the app freezes and then terminates. When I debug in Xcode 11 I see following warning lines in the console:

[framework] CoreUI: RunTimeThemeRefForBundleIdentifierAndName() couldn't find Assets.car in bundle with identifier: '(null)'

[framework] CoreUI: RunTimeThemeRefForBundleIdentifierAndName() couldn't find Assets.car in bundle with identifier: '(null)'

and then after several seconds app terminates with log entry:

Message from debugger: Terminated due to memory issue

On iOS 12 there is no such problem. I created a simple test app with several assets files and the segue on the button tap worked fine. Also I changed the target version to iOS 13, changed the bundle identifier, cleaned and rebuilt, but the problem still occurs.

In case others are seeing the warning, it’s caused by loading an image that’s NOT in an `xcassets` folder. Hopefully they’ll turn it off for the final OS release. — Wil Shipley, Sep 27 '19 at 00:13

score 4 · Accepted Answer · edited Feb 06 '20 at 16:06

I found out that problem was not related to

CoreUI: RunTimeThemeRefForBundleIdentifierAndName() couldn't find Assets.car in bundle with identifier: '(null)'

On target screen was used custom UILabel. The root cause of app freezing and memory issue was reentrant looping between its methods

override var text: String? {
    didSet {
        guard let text = text else { return }
        let textRange = NSMakeRange(0, text.count)
        // Kern attribute needed to do letter spacing over text
        let attributedText = NSMutableAttributedString(string: text)
        attributedText.addAttribute(NSAttributedStringKey.kern , value: 2.0, range: textRange)
        // Add other attributes if needed
        self.attributedText = attributedText
    }
}

and

override public func layoutSubviews() {
    super.layoutSubviews()
    if let text = self.text {
        self.text = text.uppercased()
    }
}

probably new SDK version invokes layoutSubviews() when attributedText field has changed

Thanks for sharing, I got something similar, my custom label was calling `override func layoutSubviews() { super.layoutSubviews() sizeToFit() }` Looks like sizeToFit() already calls layoutSubviews() under the hood, that was causing a loop, crashing my app. — mkai, Oct 03 '19 at 23:59

score 0 · Answer 2 · answered Sep 23 '22 at 22:26

0

I fixed this problem by adding Assets.xcasset to the build phase.

answered Sep 23 '22 at 22:26

saxjax

89
6

Wasim · Answer 3 · 2020-01-07T14:37:51.270

-1

To fix this issue, just go to target's build phase and then remove Assets.xcasset and re-add it

edited Jan 07 '20 at 14:37

answered Nov 02 '19 at 17:20

Wasim

921
12
14

How to fix warning "CoreUI: RunTimeThemeRefForBundleIdentifierAndName() couldn't find Assets.car in bundle with identifier: '(null)'"?

3 Answers3

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