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