获取类属性 变量 方法

#import <Foundation/Foundation.h>
typedef NSArray<NSString *> GLStringArray;
typedef NSMutableArray<NSString *> GLStringMutableArray;
//@compatibility_alias GLStringMutableArray NSMutableArray<NSString *>;

@interface NSObject (GL)

//变量
@property (nonatomic, class,readonly) GLStringArray * instanceVarNames;
//方法
@property (nonatomic, class,readonly) GLStringArray * instanceMethodNames;
@property (nonatomic, class,readonly) GLStringArray * classMethodNames;
//属性
@property (nonatomic, class,readonly) GLStringArray * propertyNames;

@end

#import "NSObject+GL.h"
#import <objc/runtime.h>

@implementation NSObject (GL)

+ (GLStringArray *)instanceVarNames{
    unsigned int m = 0;
    Ivar * ivarList = class_copyIvarList([self class], &m);
    GLStringMutableArray * array = [[GLStringMutableArray alloc] init];
    for (int i = 0; i < m; i ++) {
        Ivar ivar = ivarList[i];
        const char * name = ivar_getName(ivar);
        NSString * str = [NSString stringWithCString:name encoding:NSUTF8StringEncoding];
        if (str) {
            [array addObject:str];
        }
    }
    return array.copy;
}

+ (GLStringArray *)instanceMethodNames{
    return [self gl_methodNamesWithClass:[self class]];
}

+ (GLStringArray *)classMethodNames{
    return [self gl_methodNamesWithClass:object_getClass(self)];
}

+ (GLStringArray *)propertyNames{
    unsigned int m = 0;
    objc_property_t * propertyList = class_copyPropertyList([self class], &m);
    GLStringMutableArray * array = [[GLStringMutableArray alloc] init];
    for (int i = 0; i < m; i ++) {
        objc_property_t property = propertyList[i];
        const char * name = property_getName(property);
        NSString * str = [NSString stringWithCString:name encoding:NSUTF8StringEncoding];
        if (str) {
            [array addObject:str];
        }
    }
    return array.copy;
}

#pragma mark - private
+ (GLStringArray *)gl_methodNamesWithClass:(Class)aClass{
    unsigned int m = 0;
    Method * methodList = class_copyMethodList(aClass, &m);
    GLStringMutableArray * array = [[GLStringMutableArray alloc] init];
    for (int i = 0; i < m; i ++) {
        Method method = methodList[i];
        SEL sel = method_getName(method);
        [array addObject:NSStringFromSelector(sel)];
    }
    return array.copy;
}

@end