selector

I have an object, and I want to list all the selectors to which it responds. It feels like this should be perfectly possible, but I'm having trouble finding the APIs. This is a solution based on the runtime C functions: class_copyMethodList returns a list of class methods given a Class object obtainable from an object. #import <objc/runtime.h> [..] SomeClass * t = [[SomeClass alloc] init]; int i=0; unsigned int mc = 0; Method * mlist = class_copyMethodList(object_getClass(t), &mc); NSLog(@"%d methods", mc); for(i=0;i<mc;i++) NSLog(@"Method no #%d: %s", i, sel_getName(method_getName(mlist[i])))

It seems like there should be an easy way to call a selector with some arguments when all you have is a SEL object. I can't seem to find the correct syntax. -(MyClass*) init: (SEL)sel owner:(NSObject*) parent { int i =10; [parent performSelector:sel:i ]; } Take a look at the NSObject documentation. In this case: [parent performSelector:sel withObject:[NSNumber numberWithInt:i]]; (note this method is actually listed in the NSObject protocol documentation). Since -[NSObject performSelector:withObject:] requires an object argument, you will have to write a wrapper in parent's class like -(void

In MyClass.m, I've defined - (void) myTest: (NSString *) withAString{ NSLog(@"hi, %@", withAString); } and the appropriate declaration in MyClass.h . Later I want to call [self performSelector:@selector(mytest:withAString:) withObject: mystring]; in MyClass.m but I get an error similar to * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '* -[MyClass myTest:withAtring:]: unrecognized selector sent to instance 0xe421f0' I tried a simpler case with a selector that took no arguments that printed a string to console and that worked just fine. What's wrong with the

I am an iOS newbie. I have a selector method as follows - - (void) fooFirstInput:(NSString*) first secondInput:(NSString*) second { } I am trying to implement something like this - [self performSelector:@selector(fooFirstInput:secondInput:) withObject:@"first" withObject:@"second" afterDelay:15.0]; But that gives me an error saying - Instance method -performSelector:withObject:withObject:afterDelay: not found Any ideas as to what I am missing? valvoline Personally, I think that a closer solution to your needs is the use of NSInvocation. Something like the following will do the work: indexPath