On Jan 22, 2013, at 12:58 PM, Andy Lee <ag...@mac.com> wrote:
> // Or this also works (protocol).
> @protocol AvoidCompilerWarning
> - (id)initWithArg:(id)arg;
> @end
Really, a protocol is what you ought to be doing. Make a protocol with
-initWithManager: in it, and then make all the classes that might get passed to
this method comply with your protocol. Then, do this:
if ([myClass conformsToProtocol:@protocol(MyProtocol)])
myObj = [[myClass alloc] initWithManager:sel]];
else
myObj = [[myClass alloc] init];
The advantage to this method is a simple one: Suppose some random class happens
to implement a method named -initWithManager:, but that method has nothing to
do with your -initWithManager: other than a coincidental title, and takes a
completely different type of object. Your original code will result in
unpredictable behavior in this case (and probably throw an exception leading to
a crash). If you use a protocol, you'll know not just that the method responds
to something named -initWithManager:, but that it's *your* -initWithManager:
Charles
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