Error: CUICatalog: Invalid asset name supplied: (null), or invalid scale factor : 2.000000

Question

TableViewApplication[1458:70b] CUICatalog: Invalid asset name supplied: (null), or invalid scale factor: 2.000000

Getting this warning while working with TableViewController. How to rectify this error and which block is affected?

Solution 1

This one appears when someone is trying to put nil in [UIImage imageNamed:]

Add symbolic breakpoint for [UIImage imageNamed:]

Add $arg3 == nil condition on Simulator, $r0 == nil condition on 32-bit iPhone, or $x2 == nil on 64-bit iPhone.

Run your application and see where debugger will stop.

P.S. Keep in mind this also happens if image name is empty string. You can check this by adding [(NSString*)$x2 length] == 0 to the condition.

Solution 2

This error (usually) happens when you try to load an image with [UIImage imageNamed:myImage] but iOS is not sure if myImage is really a NSString and then you have this warning.

You can fix this using:

[UIImage imageNamed:[NSString stringWithFormat:@"%@", myImage]]

Or you can simply check for the length of the name of the UIImage:

if (myImage && [myImage length]) {

    [UIImage imageNamed:myImage];
}

Solution 3

Since the error is complaining that the name you gave is (null), this is most likely caused by calling [UIImage imageNamed:nil]. Or more specifically, passing in a variable hasn't been set, so it's equal to nil. While using stringWithFormat: would get rid of the error, I think there's a good chance it's not actually doing what you want. If the name you supply is a nil value, then using stringWithFormat: would result in it looking for an image that is literally named "(null)", as if you were calling [UIImage imageNamed:@"(null)"].

Something like this is probably a better option:

if (name) {
    UIImage *image = [UIImage imageNamed:name];
} else {
    // Do something else
}

You might want to set a breakpoint in Xcode on that "Do something else" line, to help you figure out why this code is getting called with a nil value in the first place.

Solution 4

In Xcode 6.4, this seems to occur when using "Selected Image" for a tab bar item in the storyboard, even if it's a valid image.

This doesn't actually seem to set the selected state image anyway, so it needs to be defined in User Defined Runtime Attributes, and removed from the SelectedImage attribute of the Tab Bar Item

Solution 5

In my case i was passing [UIImage imageNamed:@""] which caused me to show the warning. Just add breakpoints to all the lines where you have used imageNamed and the debug the line where you find the warning.

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Comments

[diegomen]

I got the same problem and the error was that the image name was nil like robotspacer says.

[mAu]

Very nice approach! I always forget about symbolic breakpoints.

[cbowns]

This is a clever approach. It looks like my nil image is somewhere in my nib, so it's not going through UIImage imageNamed:, but I'm saving this breakpoint nonetheless.

[Zev Eisenberg]

I didn't know about the $arg3 syntax for conditional breakpoints. Where can I learn more?

[Dave G]

In case anyone made the same mistake I did, I was trying to update a UIButton's background image to be removed (no image at all) and so I changed my UIImage name from a string to just "", which caused the error. By removing the entire UIImage(named: "") and replacing it with nil, the error disappeared.

[wcochran]

Thank you for that! These error/warning messages were driving me nuts! I can't figure out why Apple doesn't either get rid of the Tab Bar Item "Selected Image" pulldown in IB or fix it so it works correctly.

[derpoliuk]

Great solution, thank you. Is it possible to add condition for result, not for the argument?

[Ben]

Not sure to understand why it doesn't work for me, always returning error: use of undeclared identifier '$arg3'. Did I miss something?

[sudoExclaimationExclaimation]

i keep getting: Stopped due to an error evaluating condition of breakpoint 23.1: "$r0 == nil" Couldn't parse conditional expression: error: use of undeclared identifier '$r0' error: 1 errors parsing expression

[hasan]

Then what? nothing happen to tell me what asset is that!

[CHiP-love-NY]

I set condition: (int)[(id)($esp+12) length] == 0

[Jeff]

@DaveG You sir, saved me hours. Thankyou for the comment!

[Artem Illarionov]

$arg3 == nil (not $r0 == nil) work for me for iPhone device run

[Matthew Korporaal]

In my case the image name string was empty, so checking the arg3 length worked for me. (int)[$arg3 length] == 0

[Julfikar]

I am also using [UIImage imageNamed:@""] . How did you fix it?

[Hahnemann]

[aButton setImage:nil forState:UIControlStateNormal]

[Moshe Gottlieb]

This solved it for me, been looking for this problem for a while now, it drove me nuts. The breakpoint schtick did not work for me.

[Josh Bernfeld]

Same issue here, but the breakpoint did help me find the xib it was in. The image name was Unknown Image in IB.

[Josh Bernfeld]

If you are having difficulty finding the right register create the breakpoint without the condition, then in lldb run the following register read -f d. Look through the printed registers to see which one contains an image name, then use that register in your breakpoint condition.

[gone]

Other than using an if to test if the image name is not an empty string, or using a default "noImage" image, how do you display no image when no applicable name applies and the Assets do not contain a "noImage" image?