iOS-对于类是否符合条件的判断

conformsToProtocol:@protocol()：

int main (int argc, const char * argv[])   
{  
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];  
  
    MyClass *obj_one = [MyClass new];  
    BOOL one_conforms = [obj_one conformsToProtocol:@protocol(MyProtocol)];  
  
    MyOtherClass *obj_two = [MyOtherClass new];  
  
    //obj_two是类的实例对象，和父类相关，其父类符合协议，则其亦符合。  
  
    BOOL two_conforms = [obj_two conformsToProtocol:@protocol(MyProtocol)];  
    NSLog(@"obj_one conformsToProtocol: %d", one_conforms);//output:YES   
    NSLog(@"obj_two conformsToProtocol: %d", two_conforms);//output:YES   
    [pool drain]; return 0;  
}  

respondsToSelector:@selector（）：

判断该对象是否实现了参数方法。