ios – 目标C中接口下的声明_app

概述我正在研究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 off 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

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