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OC设置器与访问器以及自定义初始化方法
1.Person.h
#import <Foundation/Foundation.h>
@interface Person : NSObject
{
NSString * _name;
NSString * _sex;
NSInteger _age;
CGFloat _weight;
CGFloat _height;
}
- (void)sayhi;
//设置器 专门给一个实例变量赋值的方法
- (void)setName:(NSString *)name;
- (void)setSex:(NSString *)sex;
- (void)setAge:(NSInteger)age;
- (void)setWeight:(CGFloat)weight;
- (void)setHeight:(CGFloat)height;
//访问器 用来得到一个实例变量内容的方法
- (NSString *)name;
- (NSString *)sex;
- (NSInteger)age;
- (CGFloat)weight;
- (CGFloat)height;
//确定一个方法的方法名
//去掉加减号,去掉返回值类型,去掉形参类型和形参名,剩下的拼在一起就是这个方法的方法名
//OC中没有方法重载的只要方法名一样,就认为是同一个方法,不允许重复定义
+ (void)testMethd;
- (void)changName:(NSString *)name
sex:(NSString *)sex
age:(NSInteger)age
weight:(CGFloat)weight
height:(CGFloat)height;
- (void)modifyName:(NSString*)name
sex:(NSString *)sex
age:(NSInteger)age
weight:(CGFloat)weight
height:(CGFloat)height;
//自定义的初始化方法
//初始化方法都是-号方法,返回值是id,方法名以intwith打头
//自定义初始化方法的作用,创建对象的同时给某些实力变量赋初值
//一个类可以对外提供很多个初始化方法,使用的时候从众多初始化方法中挑一个使用,初始化方法在对象的生命周期里只使用一次,创建对象的同时使用初始化方法给某些实例变量赋初值.
- (id)initwithName:(NSString *)name;
- (id)initwithSex:(NSString *)sex;
- (id)initwithAge:(NSInteger)age;
- (id)initwithWeight:(CGFloat)weight;
- (id)initwithHeight:(CGFloat)height;
- (id)initwithName:(NSString *)name
sex:(NSString *)sex;
- (id)initwithName:(NSString *)name
age:(NSInteger)age;
- (id)initwithsex:(NSString *)sex
age:(NSInteger)age;
- (id)initwithweight:(CGFloat)weight
height:(CGFloat)height;
- (id)initwithName:(NSString *)name
sex:(NSString *)sex
age:(NSInteger)age;
- (id)initwithName:(NSString *)name
sex:(NSString *)sex
weight:(CGFloat)weight;
- (id)initwithName:(NSString *)name
sex:(NSString *)sex
age:(NSInteger)age
weight:(CGFloat)weight
height:(CGFloat)height;
@end
2.Person.m
#import "Person.h"
@implementation Person
- (id)init
{
_name = @"宝强";
_sex = @"男";
_age = 25;
_weight = 65;
_height = 166;
return self;
}
- (void)sayhi
{
NSLog(@"\n姓名%@,性别%@,年龄%ld,体重%.2f,身高%.2f",_name,_sex, _age,_weight,_height);
}
- (void)setName:(NSString *)name
{
_name = name;
}
- (void)setSex:(NSString *)sex
{
_sex = sex;
}
- (void)setAge:(NSInteger)age
{
_age = age;
}
- (void)setWeight:(CGFloat)weight
{
_weight = weight;
}
- (void)setHeight:(CGFloat)height
{
_height = height;
}
//访问器 用来得到一个实例变量内容的方法
- (NSString *)name
{
return _name;
}
- (NSString *)sex
{
return _sex;
}
- (NSInteger)age
{
return _age;
}
- (CGFloat)weight
{
return _weight;
}
- (CGFloat)height
{
return _height;
}
//+ 号方法,只能使用类名调用
//+ 号方法中不能使用实例变量,因为根本就没有创建对象,只有创建了对象才有内存存储实例变量
+ (void)testMethd
{
NSLog(@"hello ");
}
- (void)changName:(NSString *)name sex:(NSString *)sex age:(NSInteger)age weight:(CGFloat)weight height:(CGFloat)height
{
_name = name;
_sex = sex;
_age = age;
_weight = weight;
_height = height;
}
- (void)modifyName:(NSString*)name
sex:(NSString *)sex
age:(NSInteger)age
weight:(CGFloat)weight
height:(CGFloat)height
{
_name = name;
_sex = sex;
_age = age;
_weight = weight;
_height = height;
}
//自定义初始化方法
- (id)initwithName:(NSString *)name
{
_name = name;
return self;
}
- (id)initwithSex:(NSString *)sex
{
_sex = sex;
return self;
}
- (id)initwithAge:(NSInteger)age
{
_age = age;
return self;
}
- (id)initwithWeight:(CGFloat)weight
{
_weight = weight;
return self;
}
- (id)initwithHeight:(CGFloat)height
{
_height = height;
return self;
}
- (id)initwithName:(NSString *)name
sex:(NSString *)sex
{
_name = name;
_sex = sex;
return self;
}
- (id)initwithName:(NSString *)name
age:(NSInteger)age
{
_name = name;
_age = age;
return self;
}
- (id)initwithsex:(NSString *)sex
age:(NSInteger)age
{
_sex = sex;
_age = age;
return self;
}
- (id)initwithweight:(CGFloat)weight
height:(CGFloat)height
{
_weight = weight;
_height = height;
return self;
}
- (id)initwithName:(NSString *)name
sex:(NSString *)sex
age:(NSInteger)age
{
_name = name;
_sex = sex;
_age = age;
return self;
}
- (id)initwithName:(NSString *)name
sex:(NSString *)sex
weight:(CGFloat)weight
{
_name = name;
_sex = sex;
_weight = weight;
return self;
}
- (id)initwithName:(NSString *)name
sex:(NSString *)sex
age:(NSInteger)age
weight:(CGFloat)weight
height:(CGFloat)height
{
_name = name;
_sex = sex;
_age = age;
_weight = weight;
_height = height;
return self;
}
@end
3.main.m
int main(int argc, const char * argv[]) {
Person * p = [[Person alloc]init];
[p sayhi];
Person * p1 = [[Person alloc]init];
[p1 setName:@"zhangsan"];//[p1 sayhi];
NSLog(@"%@",[p1 name]);
Person * p2 = [[Person alloc]init];
[p2 setName:@"zhaosi"];
[p2 setSex:@"男"];
[p2 setAge:20];
[p2 setWeight:120];
[p2 setHeight:178];
NSLog(@"%@,%@,%ld,%.2f斤,%.2fcm",[p2 name],[p2 sex], [p2 age],[p2 weight],[p2 height]);
Person * p3 = [[Person alloc]init];
[p3 changName:@"祖蓝" sex:@"男" age:30 weight:30 height:177];
NSLog(@"%@,%@,%ld,%.2f斤,%.2fcm",[p3 name],[p3 sex], [p3 age],[p3 weight],[p3 height]);
Person * p4 = [[Person alloc]init];
[p4 modifyName:@"李晨" sex:@"男" age:30 weight:30 height:177];
NSLog(@"%@,%@,%ld,%.2f斤,%.2fcm",[p4 name],[p4 sex], [p4 age],[p4 weight],[p4 height]);
Person * p5 = [[Person alloc]init];
[p5 sayhi];
// 自定义初始化方法
Person * p6 = [[Person alloc] initwithName:@"吴强"];
Person * p7 = [[Person alloc] initwithName:@"赵子龙"];
[p6 setName:@"关羽"];
[p6 sayhi];[p7 sayhi];
Person * p8 = [[Person alloc]initwithName:@"张飞" sex:@"男" age:30 weight:70 height:180];
[p8 sayhi];
return 0;
}
本文出自 “开创未来” 博客，请务必保留此出处http://zhaopeichina.blog.51cto.com/9782414/1602651
OC设置器与访问器以及自定义初始化方法