Typecasting doesn't work. How to convert an object?

Posted by Nastase Ion on Stack Overflow See other posts from Stack Overflow or by Nastase Ion
Published on 2010-05-01T17:21:40Z Indexed on 2010/05/01 17:27 UTC
Read the original article Hit count: 135

Filed under:

objective-c

Hi everyone!

I need to convert a custom object to a different object. How can I do that?

I know that typecasting doesn't work (the only thing is does is "shuts the compiler warnings off", but nothing more). Here is a sample code:

MyType* obj1;
MyOtherType* obj2;

obj1 = [MyType initWithData: 1];
obj2 = (MyOtherType*) obj1;

if ([obj2 isMemberOfClass: [MyOtherType class]]) { NSLog(@"OK"); }
else if ([obj2 isMemberOfClass: [MyType class]]) { NSLog(@"Nope"); }

The result is:

Nope

What can I do??

Related posts about objective-c

Blocking access to websites with objective-C / root privileges in objective-C

as seen on Stack Overflow - Search for 'Stack Overflow'
I am writing a program in Objective-C (XCode 3.2, on Snow Leopard) that is capable of either selectively blocking certain sites for a duration or only allow certain sites (and thus block all others) for a duration. The reasoning behind this program is rather simple. I tend to get distracted when I… >>> More
Objective-C with some Objective-C++, calling a normal c++ method "referenced from" problem

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I made an Objective-C project for the iPhone. I had only one cpp class, the soundEngine taken from some Apple demo. Now I'm trying to merge OpenFeint which is coded in Objective-C++. As soon as I drop in the code without even referring to it from my code, when I hit Build, my Objective-C code… >>> More
Add an objective @property attribute in objective-c

as seen on Stack Overflow - Search for 'Stack Overflow'
Does anyone know of a way to add additional attribute types to the @property keyword without modifying the compiler? Or can anyone think of another way to genericize getter/setter creation? Basically, I have a lot of cases in a recent project where it's handy for objects to lazily instantiate their… >>> More
ObjectiveC Syntax for Specifying Protocol Name in Method Argument

as seen on Stack Overflow - Search for 'Stack Overflow'
What's the ObjectiveC syntax for specifying a protocol as an argument in a method? Say I have 2 protocols, MyProtocol and MyProtocolCB: @protocol MyProtocolCB <NSObject> - (void) func; @end @protocol MyProtocol <NSObject> - (void) register:(MyProtocolCB*) cb; @end I'm receiving this… >>> More
ObjectiveC builtin template system ?

as seen on Stack Overflow - Search for 'Stack Overflow'
I am developing an iPhone application and I use HTML to display formatted text. I often display the same webpage, but with a different content. I would like to use a template HTML file, and then fill it with my diffent values. I wonder if ObjectiveC has a template system similar to ERB in Ruby. That… >>> More

Developer IT

Typecasting doesn't work. How to convert an object? - Developer IT

Typecasting doesn't work. How to convert an object?

objective-c

Related posts about objective-c

Blocking access to websites with objective-C / root privileges in objective-C

Objective-C with some Objective-C++, calling a normal c++ method "referenced from" problem

Add an objective @property attribute in objective-c

ObjectiveC Syntax for Specifying Protocol Name in Method Argument

ObjectiveC builtin template system ?

Categories cloud