object_getInstanceVariable works for float, int, bool, but not for double?

Question

I\'ve got object_getInstanceVariable to work as here however it seems to only work for floats, bools and ints not doubles. I do suspect I\'m doing something wro

Answer 1

What about using valueForKey:?

NSNumber * value = [self valueForKey:[NSString stringWithUTF8String:ivar_getName(tmpIvar)]];
NSLog(@"Double value: %f", [value doubleValue];

Note: this requires you to have a "someFloat" method. If you want to use setValue:forKey:, you'll also need the "setSomeFloat:" method. This is easily implemented by declaring the ivar as an @property and synthesizing it.