判断对象类型
-(BOOL) isKindOfClass: classObj判断是否是这个类或者这个类的子类的实例
-(BOOL) isMemberOfClass: classObj 判断是否是这个类的实例
测试实例:
新建Person类继承NSObject,新建Teacher类继承Person
新建Person类:
#import <Foundation/Foundation.h> @interface Person : NSObject { NSString *name; } -(void)setName:(NSString*)n; @end
#import "Person.h" @implementation Person -(void)setName:(NSString *)n { name = n; } @end
新建Teacher类
#import "Person.h" @interface Teacher : Person -(void)teach; @end
#import "Teacher.h" @implementation Teacher -(void)teach { NSLog(@"我教数学"); } @end
我们先试验isMemberOfClass方法:
Person *person = [[Person alloc] init]; Teacher *teacher = [[Teacher alloc] init]; //YES if ([teacher isMemberOfClass:[Teacher class]]) { NSLog(@"teacher Teacher类的成员"); } //NO if ([teacher isMemberOfClass:[Person class]]) { NSLog(@"teacher Person类的成员"); } //NO if ([teacher isMemberOfClass:[NSObject class]]) { NSLog(@"teacher NSObject类的成员"); }
打印结果:
2017-05-26 11:13:07.965 ObjectiveCTest[2460:f803] teacher Teacher类的成员 只有第一个判断打印出来，isMemberOfClass判断是否是属于这类的实例，是否跟父类有关系他不管。
isKindOfClass方法
Person *person = [[Person alloc] init]; Teacher *teacher = [[Teacher alloc] init]; //YES if ([teacher isKindOfClass:[Teacher class]]) { NSLog(@"teacher 是 Teacher类或Teacher的子类"); } //YES if ([teacher isKindOfClass:[Person class]]) { NSLog(@"teacher 是 Person类或Person的子类"); } //YES if ([teacher isKindOfClass:[NSObject class]]) { NSLog(@"teacher 是 NSObject类或NSObject的子类"); }
打印结果:
2017-05-26 11:15:17.315 ObjectiveCTest[2595:f803] teacher 是 Teacher类或Teacher的子类 2017-05-26 11:15:17.316 ObjectiveCTest[2595:f803] teacher 是 Person类或Person的子类 2017-05-26 11:15:17.316 ObjectiveCTest[2595:f803] teacher 是 NSObject类或NSObject的子类 三个结果都打印出来了。
isKindOfClass和isMemberOfClass 的区别
原文：http://www.cnblogs.com/dianming/p/6907587.html