[OC Foundation框架 - 16] NSObject和反射

1.判断某个对象是否属于一个类

1         Student *stu = [[[Student alloc] init] autorelease];
2         BOOL result= [stu isKindOfClass:[Person class]];
3         NSLog(@"%i", result);
4        
5         //判断对象是否属于某个类，不包括子类
6         NSLog(@"%i",[stu isMemberOfClass:[Student class]]);
7         NSLog(@"%i",[stu isMemberOfClass:[Person class]]);

 

2.间接调用对象的一个方法

1         //间接调用
2         [stu performSelector:@selector(test)];
3         [stu performSelector:@selector(test2:) withObject:@"ABC"];
4        
5         //延迟调用，单位sec
6         [stu performSelector:@selector(test2:) withObject:@"yuoo" afterDelay:2];

 

3.类名反射，方法反射

 1 void reflect()
 2 {
 3     //类的反射
 4     NSString *str = @"Person";
 5     Class class = NSClassFromString(str);
 6    
 7     Person *p = [[class alloc] init];
 8     NSLog(@"%@", p);
 9    
10     NSString *str2 =  NSStringFromClass([Person class]);
11    
12     //方法的反射
13     NSString *method = @"test";
14     SEL selector = NSSelectorFromString(method);
15     NSLog(@"reflect method:");
16     [p performSelector:selector];
17 }