Menu
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.
337
In Objective-C, selector has two meanings. It can be used to refer simply to the name of a method when it's used in a source-code message to an object. It also, though, refers to the unique identifier that replaces the name when the source code is compiled.
[yourObject isKindOfClass:[a class]] // Returns a Boolean value that indicates whether the receiver is an instance of // given class or an instance of any class that inherits from that class.
Use Selectors to Arrange Calls to Objective-C Methods In Objective-C, a selector is a type that refers to the name of an Objective-C method. In Swift, Objective-C selectors are represented by the Selector structure, and you create them using the #selector expression.
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]))); /* note mlist needs to be freed */ I think usually you'll want to do that in the console, instead of cluttering your code with debug code. This is how you can do that while debugging in lldb:
(Assuming an object t)
p int $num = 0; expr Method *$m = (Method *)class_copyMethodList((Class)object_getClass(t), &$num); expr for(int i=0;i<$num;i++) { (void)NSLog(@"%s",(char *)sel_getName((SEL)method_getName($m[i]))); } If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
