oc-26-动态类型检测

/**
 1).判断对象是不是指定类的对象或者指定类的子类对象.
 - (BOOL)isKindOfClass:(Class)aClass;
 
 2).判断对象是不是1个特定类型的对象,不包括子类.
 - (BOOL)isMemberOfClass:(Class)aClass;
 
 3).判断1个类是不是另外1个类的子类.
 + (BOOL)isSubclassOfClass:(Class)aClass;
 
 4).判断对象中是否能响应指定的方法. 这个最常用.
 - (BOOL)respondsToSelector:(SEL)aSelector;
 
 5).判断类中是否能响应指定方法.
 +(BOOL)instancesRespondToSelector:(SEL)aSelector;
 
 */
#import <Foundation/Foundation.h>
#import "DogSon.h"

int main(int argc, const char * argv[]) {
    @autoreleasepool {
        
        // 3).判断1个类是不是另外1个类的子类.
        Class c = [Dog class];
        BOOL res = [DogSon isSubclassOfClass:c];
        NSLog(@"%d",res);

    }
    return 0;
}
// 判断 某个类是否能相应制定方法
void demo3(){
    SEL s = @selector(play);
    BOOL res = [Dog instancesRespondToSelector:s];
    NSLog(@"%d",res);

}
// 判断某个对象能否相应某个方法
void demo2()
{
    Dog *son = [DogSon new];
    
    SEL s = @selector(play);
    
    BOOL res =  [son respondsToSelector:s];
    
    NSLog(@"%d",res);
}
// 判断对象是不是1个特定类型的对象,不包括子类.不包括父类
void demo1(){
    DogSon *son = [DogSon new];
    
    // 获取狗的类对象
    Class dog = [Dog class];
    
    // 判断对象是不是1个特定类型的对象,不包括子类.不包括父类
    BOOL res = [son isMemberOfClass:dog];
    
    NSLog(@"%d",res);
}

// 判断某个对象是否是某个类创建出来的对象
void demo()
{
    DogSon *son = [DogSon new];
    
    // 获取小狗的类对象
    Class dog = [DogSon class];
    
    //检查son对象是否是小狗类创建出来的对象
    BOOL res = [son isKindOfClass:dog];
    
    NSLog(@"%d",res);
}

 

#import <Foundation/Foundation.h>
#import "Dog.h"
int main(int argc, const char * argv[]) {
    @autoreleasepool {
        
        Dog *d = [Dog new];
        //- (void)run;
        [d performSelector:@selector(run)];
        //- (void)name:(NSString *)name;
        [d performSelector:@selector(name:) withObject:@"哈利"];//方法名是name:，performSelector:withObject:是方法名，

    }
    return 0;
}