Return value for performSelector:

Question

What will the return value for performSelector: if I pass a selector that returns a primitive type (on object), such as 'week' on NSDateComponents (which will return an int)?

Answer 1

An example of using NSInvocation to return a float:

SEL selector = NSSelectorFromString(@"someSelector"); if ([someInstance respondsToSelector:selector]) {     NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:                                 [[someInstance class] instanceMethodSignatureForSelector:selector]];     [invocation setSelector:selector];     [invocation setTarget:someInstance];     [invocation invoke];     float returnValue;     [invocation getReturnValue:&returnValue];     NSLog(@"Returned %f", returnValue); }