CODEWITHSUNDEEP
objective-cnsmutabledictionary
viper110110
viper110110

Reputation: 105

add protocol to NSDictionary

I have a protocol in Objective-C. I am, in another class, trying to add an object that implements this protocol to an NSMutableDictionary.

- (void) addValue:(NSString*)myString withObject:(id<MyProtocol>*)protocolThing
{
    [dictionary insertValue:protocolThing inPropertyWithKey:myString];
}

This gives me an error saying "Implicit conversion of an indirect pointer to an Objective-C pointer to 'id' is disallowed with ARC"

How can I do this?

This is coming from Java, where I can declare an interface and then treat objects that implement that interface as regular objects and then add them to HashMaps.

Upvotes: 1

Views: 498

Answers (2)

Pfitz
Pfitz

Reputation: 7344

When using id you do not use a *

Use this:

- (void) addValue:(NSString*)myString withObject:(id<MyProtocol>)protocolThing

Upvotes: 1

Joshua Weinberg
Joshua Weinberg

Reputation: 28688

Your problem is that id<MyProtocol> is already a pointer type. Change your signature to

- (void) addValue:(NSString*)myString withObject:(id<MyProtocol>)protocolThing

And it will work fine.

Upvotes: 2

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