响应有参方法

#import <Foundation/Foundation.h>
#import "Dog.h"

int main(int argc, const char * argv[]) {
    @autoreleasepool {
        
        // 动态类型检测 ：响应方法
        
        Animal *ani = [Dog new];
        
        SEL s1 = @selector(eat);
        
        // 1)通过performSelector响应无参的方法
        if ([ani respondsToSelector:s1]) {
            [ani performSelector:s1]; // 作用，响应方法 没有参数
        } else{
            NSLog(@"该对象不能调用此方法");
        }
        
        // 2）通过performSelector witOobject响应有参的方法
        SEL s2 = @selector(eat:);
        [ani performSelector:s2 withObject:@"一块"];
        
        // 3）通过performSelector: withObject: withObject:响应有里两个参的方法
        [ani performSelector:@selector(eat:andFoodName:) withObject:@"他" withObject:@"tang"];
    }
    return 0;
}