https://github.com/SnowGirls/iCategory-NSString/tree/master/iCategory-NSString https://github.com/SnowGirls/iCategory-NSString/blob/main/iCategory-NSString/NSString%2BExtension.m#L16 The reason is that your own +initialize method called, the original +[NSString initialize] method never be invoked once. Reference: https://github.com/gnustep/libs-base/blob/efccdb1d71166cfe096f309a97747175f46c1435/Source/GSString.m#L3515

Use dsc_extractor to extract the Foundation.framework out from the dyld_shared_cache_arm64, that pull down from iOS 15.6 (on $HOME/Library/Developer/Xcode/iOS\ DeviceSupport/15.6/Symbols/System/Library/Caches/com.apple.dyld/dyld_shared_cache_arm64e). Drag it to Foundation.framework/Foundation to IDA64. So, the reason is obvious, the +[NSString initialize] will enable/disable the NSTaggedPointerString feature. If u implement one in category, your app will not recognize a Tagged Pointer String.

Solution： https://github.com/SnowGirls/Objc-Deallocating Using a UITouch Category to Override this method and check the Deallocating object. - (BOOL)_wantsForwardingFromResponder: toNextResponder: withEvent: How to use? Just drag the ObjcUtil.h/m and UITouch+FixCrashOnInputKeyboard.h/m into your Xcode project, and done.

Look at this，hope it helps you - https://developer.apple.com/forums/thread/711820?answerId=745458022#745458022 Using a UITouch category to filter the deallocating object. - (BOOL)_wantsForwardingFromResponder: toNextResponder: withEvent: Github： https://github.com/SnowGirls/Objc-Deallocating . Just Drag the ObjcUtil.h/m and UITouch+FixCrashOnInputKeyboard.h/m into your Xcode project.

+ (BOOL) isSendEventToDealloctingObject:(UIEvent *)event { if (event.type == UIEventTypeTouches) { for (UITouch *touch in event.allTouches) { NSString *windowName = NSStringFromClass([touch.window class]); if ([windowName isEqualToString:@"UIRemoteKeyboardWindow"]) { UIView* view = touch.view; UIResponder *arg2 = view.nextResponder; NSString* responderClassName = NSStringFromClass([arg2 class]); if ([responderClassName isEqualToString:@"_UIRemoteInputViewController"]) { bool isDeallocating = false; // Use 'performSelector' when u are develop a App-Store App. #pragma clang diagnostic push #pragma clang diagnostic ignored "-Warc-performSelector-leaks" SEL sel = NSSelectorFromString(@"_isDeallocating"); isDeallocating = [arg2 respondsToSelector:sel] && [arg2 performSelector:sel]; #pragma clang diagnostic pop if (isDeallocating) { NSLog(@"UIWindow - BingGo a deallocating object ..."); return true; } } } } } return false; }