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标题: 好痛苦啊，初学OC内存管理，光方法就写一大推 [打印本页]

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作者: 菜鸟八哥    时间: 2015-1-14 20:50
标题: 好痛苦啊，初学OC内存管理，光方法就写一大推
import<Foundation/Foundation.h>

@interface Student :NSObject
{
int _no;
NSString *_name;
Car *_car;
Dog *_dog;
}

-(void)setNo:(int)no;
-(int)no;
-(void)setName:(NSString *)name;
-( NSSTring *)name;
-(void)setCar:(Car *)car;
-(Car *)car;
-(void)setDog:(Dog *)dog;
-(Dog *)dog;





@end

@implementation Student
-(void)setNo:(int)no
{
_no=no;
}
-(int)no
{

return _no;
}
-(void)setName:(NSString *)name
{
if(_name!=name)
{
[_name release];
_name= [name retain];


}

}

-( NSSTring *)name
{
return _name;
}
-(void)setCar:(Car *)car
{
if(_car!=car)
{
[_car release];
_car= [car retain];


}

}
-(Car *)car
{


return _car;
}
-(void)setDog:(Dog *)dog
{
if(_dog!=dog)
{
[_dog release];
_dog= [dog retain];


}

}
-(Dog *)dog
{

return dog;
}

-(void)delloc
{
//拥有几个对象成员变量，就做几个成员变量的release
[_name release];
[_car release];
[_dog release];

  

[super delloc];
}


@end
//Car对象
@interface Car :NSObject


@end

@implementation Car


@end
//Dog对象

@interface Dog :NSObject


@end

@implementation Dog


@end




int main()
{
Student *stu =[Student alloc]  init];
  
  Car * c = [[Car alloc] init];
     stu.car=c;
  Dog *d = [[Dog alloc] init]
      stu.dog=d;
     
   NSString *s =@"Jack";//凡是对象不是通过alloc产生的，就不需要release
   stu.name = s;

  
  [d release];

   [c release];
   [stu  release];







return 0;
}

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