On Feb 3, 2010, at 3:55 AM, Philip Vallone wrote:
currentSection = @"Some value"; The retain count goes to 1
This assigns a new value to the pointer variable 'currentSection'. It now points to the immutable string literal @"Some value".
However if I assign a value with [currentSection setString:@"Some value"]; The retain count is still zero.
This tells the mutable string object that 'currentSection' currently points to, to replace its contents with the characters in the string @"Some value".
If you find the retain count is zero after this, it's probably because the value of 'currentSection' is nil, i.e. it doesn't point to any object. In that case the -setString: message is a no-op since messages to nil are ignored, and -retainCount will return zero because messages to nil always return 0/nil.
In general, it sounds as though you're unclear on the distinction between an object and a pointer to an object. It's the same as structs vs. pointers to structs in C, or for objects in C++; the difference is that Objective-C objects can only be referred to by pointers (you can't have a variable of type "NSString", only "NSString*".)
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