[OC Foundation框架 - 16] NSObject和反射

1.判断某个对象是否属于一个类

         Student *stu = [[[Student alloc] init] autorelease];
         BOOL result= [stu isKindOfClass:[Person class]];
         NSLog(@"%i", result);

         //判断对象是否属于某个类，不包括子类
         NSLog(@"%i",[stu isMemberOfClass:[Student class]]);
         NSLog(@"%i",[stu isMemberOfClass:[Person class]]);

 

2.间接调用对象的一个方法

         //间接调用
         [stu performSelector:@selector(test)];
         [stu performSelector:@selector(test2:) withObject:@"ABC"];

         //延迟调用，单位sec
         [stu performSelector:@selector(test2:) withObject:@"yuoo" afterDelay:];

 

3.类名反射，方法反射

 void reflect()
 {
     //类的反射
     NSString *str = @"Person";
     Class class = NSClassFromString(str);

     Person *p = [[class alloc] init];
     NSLog(@"%@", p);

     NSString *str2 =  NSStringFromClass([Person class]);

     //方法的反射
     NSString *method = @"test";
     SEL selector = NSSelectorFromString(method);
     NSLog(@"reflect method:");
     [p performSelector:selector];
 }