How to adapt an application for x64?

Question

Objective-C

Good day, please tell me how to adapt the application for x64, for example I write:
For x32

stringNumbersYearsUser = [NSString stringWithFormat:@"%d", [stringTodayYear integerValue] - [stringYearsUsers integerValue] - 1];

Normally, XCode says nothing, but if you change it to iPhone x64 in the simulator, it suggests writing like this:

stringNumbersYearsUser = [NSString stringWithFormat:@"%ld", [stringTodayYear integerValue] - [stringYearsUsers integerValue]];

But, then when I switch to x32, it offers to change it back, since what data types should I use?
Thank you for your attention!

Answer 1

So that there are no warnings, we bring it to a 64-bit value and output it already

NSInteger notifyID = 5;
NSLog(@"%ld, (long)notifyID);

Answer 2

stackoverflow.com/questions/19801844/how-can-i-mak...

Answer 3

It's all about the size of long in the system. The integerValue method returns an NSInteger, which is defined as typedef long NSInteger. Accordingly, in a 32-bit system it is 4 bytes, and in a 64-bit system it is 8 bytes, to display a number with a greater bit depth, you need to change the format specifier. I suppose it's enough to leave ld and forget about 32-bit warning