Objective-C: Case-sensitive in file names in Xcode 12.5 and above
If your code base still uses Objective-C as of August 2021. You might want to pay extra attention to the file names case-sensitivity. Because the Xcode 12.5 and above and Objective-C compiler will not complain about case-sensitivity and they will point to the files where the case-sensitivity is not matching.
When creating both header (.h) and messages (.m) files I suggest developer to pay extra attention.
For example, I have a file named SYSLoginChecker. For which I created the both header file…