Related APIs: +[UIImage imageNamed:] +[UIImage imageNamed:inBundle:compatibleWithTraitCollection:] When there is only a color set with the name (no image set provided), reading the image with the above-mentioned APIs throws an exception: 2023-12-19 19:30:34.008701+0800 ***[57410:578064] *** Assertion failure in -[_UIImageCGImageContent initWithCGImageSource:CGImage:scale:], _UIImageContent.m:666 2023-12-19 19:30:34.031207+0800 ***[57410:578064] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Need an imageRef' Even when wrapped in a try/catch block, it still crashes due to a lock issue after calling the related API twice. Here is an example code snippet: UIImage *image; for (NSInteger i=0; i<10; i++) { @try { image = [UIImage imageNamed:@"sample"]; //image = [UIImage imageNamed:@"sample" inBundle:[NSBundle mainBundle] compatibleWithTraitCollection:nil]; } @catch (NSException *exception) { } } The crash backtrace is as follows: #0 0x0000000102b12214 in _os_unfair_lock_recursive_abort () #1 0x0000000102b0da50 in _os_unfair_lock_lock_slow () #2 0x000000010ab07624 in -[UIImageAsset imageWithConfiguration:] () #3 0x000000010b2f4634 in -[_UIAssetManager imageNamed:configuration:] () #4 0x000000010aaf2394 in +[UIImage imageNamed:inBundle:withConfiguration:] () #5 0x000000010aaf2200 in +[UIImage imageNamed:inBundle:compatibleWithTraitCollection:] () #6 0x0000000105442154 in +[UIImageAccessibility imageNamed:inBundle:compatibleWithTraitCollection:] () It seems that the color set is being treated as an imageRef in this image reading process. It's a bug of UIKit?