一 ：ios学习笔记 OC入门2 点语法

OC 点语法

[foo value] === foo.value

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Dog.h

@interface Dog:NSObject

{

  int age;

}

-(void)setAge:(int)newAge;

-(int)age;

@end

---------------------------------

Dog.m

*import "Dog.h"

@implementataion Dog

-(void)setAge:(int)newAge

{

age=newAge;

}

-(int)age

{

return age;

}

@end

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使用经典调用和点语法

Dog *dog=[[Dog alloc] init];

[dog serAge:100];

int dogAge=[dog age];

NSLog(@"Dog Age is %d",dogAge);

dog.age=200;

dogAge=dog.age;

NSLog(@"Dog New Age is %d",dogAge);

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@property

@property是让编译器自动产生函数

-(void)setAge:(int)newAge;

-(int)age;

==

@property int age;

-------------------

@synthesize

@synehesize 就是编译器自动实现getter和setter函数

-(void)setAge:(int)newAge

{

age=newAge;

}

-(int)age

{

return age;

}

==

@synthesize age;

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类内部age和self.age是不一样的