NSObject+Methods.h

NSObject+Methods.h

#import <Foundation/Foundation.h>
#import <objc/objc-runtime.h>

@interface NSObject (Methods)

- (NSArray *)methods;
- (NSArray *)methodsUntilRoot;

// TODO: classメソッド関連
// Method class_getClassMethod(Class cls, SEL name)

@end

@implementation NSObject (Methods)

- (NSArray *)methods
{
    return [self methodsWithClass:self.class];
}

- (NSArray *)methodsUntilRoot
{
    NSMutableArray *methodsArray = [NSMutableArray new];
    Class cls = self.class;
    while (cls != nil) {
        [methodsArray addObject:[self methodsWithClass:cls]];
        cls = class_getSuperclass(cls);
    }
    return [methodsArray copy];
}

- (NSArray *)methodsWithClass:(Class)cls
{
    NSMutableArray *methodsArray = [NSMutableArray new];
    
    unsigned int numMethods;
    Method *methods = class_copyMethodList(cls, &numMethods);
    for (unsigned int i = 0; i < numMethods; i++) {
        Method method = methods[i];
        SEL selector = method_getName(method);
        NSString *methodName = NSStringFromSelector(selector);
        [methodsArray addObject:methodName];
    }
    NSLog(@"%@", methodsArray);
    
    return [methodsArray copy];
}

@end