Question

How can i add an id and selector to nsdictionary? These doesn’t works:

id target = mainTarget;
    SEL selector=mainSelector;
    NSDictionary *tAndS=[[NSDictionary alloc]initWithObjectsAndKeys:target,@"target",selector,@"selector", nil];

Answer 1

The documentation says:

In general, a key can be any object (provided that it conforms to the
NSCopying protocol—see below)

A selector does not conform to NSCopying, but you can convert one to a string (which does conform to the protocol):

NSString* sel = NSStringFromSelector(@selector(hello:));

The id is no different. If your object conforms to NSCopying then you’re good to go. If not, you’ll have to wrap it in something that does, such as NSData or just implement NSCopying (the latter would be “cleanest”).