IOS之学习笔记三(简单对象和static和单例)

发布时间：2023-03-25 11:34:19 所属栏目：教程来源：

导读：#import <Foundation/Foundation.h>
@interface Person : NSObject
{
Nsstring *_name;
int _age;
}
-(void)setName:(Nsstring *) name andAge:(int) age;
-(void)say:(Nsstring *)content;
-(Nss

#import <Foundation/Foundation.h>
@interface Person : NSObject
{
Nsstring *_name;
int _age;
}
-(void)setName:(Nsstring *) name andAge:(int) age;
-(void)say:(Nsstring *)content;
-(Nsstring *)info;
+(void)foo;
@end

Person.m

#import "Person.h"
@implementation Persion
{
int test;
}
-(void)say:(Nsstring *)content
{
NSLog(@"%@",content);
}
-(Nsstring *)info
{
[self test];
return [Nsstring stringWithFormat:@"名字:%d,年龄%d,",_name,_age];
}
+(void)foo
{
NSLog(@"通过类名调用");
}
-(void)test
{
NSLog(@"this is a test method");
}
@end
-(void)setName:(Nsstring *) _name andAge:(int) _age
{
//记得这里是self->_name不是self._name,一定要注意。
self->_name = _name;
self->_age = _age;
}
Person *person = [[Person alloc] init];
[person say:@"hello"];
[person setName:@"chenyu" andAge:26];
Nsstring *info = [person info];
NSLog(@"info is %@",info);
[Persion foo];

id类型可以代表所有对象的类型，可以任何类的对象赋值给id类型变量

id p = [[Person alloc] init];
[p say:@"hello"];

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