ios – 目标C中接口下的声明

我正在研究Big Nerd Ranch的Objective C编程书.
我看到如下代码：

@interface BNREmployee : BNRPerson
{
    NSMutableArray *_assets;
}


@property (nonatomic) unsigned int employeeID;
@property (nonatomic) unsigned int officeAlarmCode;
@property (nonatomic) NSDate *hireDate;
@property (nonatomic,copy) NSArray *assets;

-(double)yearsOfEmployment;
-(void)addAsset:(BNRAsset *)a;
-(unsigned int)valueOfAssets;

在这段代码中,为什么在接口下声明NSMutableArray * _assets？这与将其宣布为财产有何不同,它的目的是什么？

最后,我看到房产中有一个NSArray *资产.这与NSMutableArray * _assets基本相同吗？

解决方法

Nginx error!

The page you are looking for is not found.

Website Administrator

Something has triggered missing webpage on your
website. This is the default 404 error page for
Nginx that is distributed with
Fedora. It is located
/usr/share/Nginx/html/404.html

You should customize this error page for your own
site or edit the error_page directive in
the Nginx configuration file
/etc/Nginx/Nginx.conf.