我可以将（unsigned）更改为（NSUInteger）还是会产生问题？

Question

I am a Jr Software Developer, can I just change the (unsigned) to (NSUInteger) or will to create problems later?

- (unsigned)retainCount
{
    return UINT_MAX;  //denotes an object that cannot be released
}

warning said

MKStoreManager.m:88:1: Conflicting return type in implementation of 'retainCount': 'NSUInteger' (aka 'unsigned long') vs 'unsigned int'

I found a previous definition

- (NSUInteger)retainCount OBJC_ARC_UNAVAILABLE;

Answer 1

Your method must return NSUInteger because that is how the retainCount method is defined in NSObject .

The error is being caused by the value you are trying to return. Instead of returning UINT_MAX , you should return NSUIntegerMax .

The underlying type for NSUInteger changes depending on whether building for 32 or 64 bit. Accordingly, the value of NSUIntegerMax also changes to match the type.

- (NSUInteger)retainCount
{
    return NSUIntegerMax;  //denotes an object that cannot be released
}