Question

For example I have a method that looks like this

[self performSelectorOnMainThread:@selector(someMethod) 
                       withObject:data
                    waitUntilDone:YES];

In which “someMethod” is from another class. If it is possible, how can I do that?
Also, I’d like to know how can I pass in the parameters.

Assume that someMethod is defined as:

- (void)someMethod:(NSData *)data otherArg:(NSString *)arg;

Answer 1

Yes you can call selector of another class as well.

If selector is class method –

[ClassName performSelectorOnMainThread:@selector(someMethod:) 
                   withObject:data
                waitUntilDone:YES];

and method signature is something like –

+ (void)someMethod:(returntype)somearg

If selector is instance method –

[classInstance performSelectorOnMainThread:@selector(someMethod:) 
                   withObject:data
                waitUntilDone:YES];

and method signature is something like –

- (void)someMethod:(returntype)somearg