#import <Foundation/Foundation.h>

@interface Person : NSObject

- (void)test;

@end

#import "Person.h"

@implementation Person

- (void)test {

    NSLog(@"调用了Person的test方法");

}

@end

#import "Person.h"

@interface Student : Person

- (void)test;

- (void)test2:(NSString *)a;

@end

#import "Student.h"

@implementation Student

- (void)test {

    NSLog(@"调用了test方法");

}

- (void)test2:(NSString *)a {

    NSLog(@"调用了test2方法:%@", a);

}

@end

#import <Foundation/Foundation.h>

#import "Student.h"

#import "Person.h"

#pragma mark NSObject常用方法

void objUse() {

    Student *stu = [[[Student alloc] init] autorelease];

    // isKindOfClass判断对象是否属于某个类 或者 子类

    if ( [stu isKindOfClass:[Person class]] ) {

        // NSLog(@"stu属于Person或者继承自Person");

    }

    // isMemberOfClass判断对象是否属于某个类（不包括子类）

    BOOL result = [stu isMemberOfClass:[Student class]];

    // NSLog(@"%i", result);

    // 直接调用

    // [stu test];

    // 间接调用

    [stu performSelector:@selector(test)];

    // [stu performSelector:@selector(test2:) withObject:@"abc"];

    // 延迟2秒后调用test2:方法

    [stu performSelector:@selector(test2:) withObject:@"abc" afterDelay:];

}

void reflect() {

    // 类的反射

    NSString *str = @"Person";

    Class class = NSClassFromString(str);

    Person *person = [[class alloc] init];

    NSLog(@"%@", person);

    // Class变成字符串

    NSString *name =  NSStringFromClass([Person class]);

    // 方法的反射

    NSString *method = @"test";

    SEL selector = NSSelectorFromString(method);

    [person performSelector:selector];

    // 将SEL转换为字符串

    NSString *selectorName = NSStringFromSelector(selector);

    [person release];

}