如何在iPhone中创建Array of Array? [英] How to create Array of Array in iPhone?

问题描述

我想创建一个嵌套数组或多维数组.

I want to create a nested array or multidimensional array.

在我的数据中，

         FirstName   class   year   dept  lastName
         Bob          MBA    2000   Comp  Smith
         Jack         MS     2001   Comp  McDonald

         NSMutableArray *section = [[NSMutableArray alloc] init];  

我想将数据放入Array部分.

I want to put my data into the section Array.

例如:

section[0] = [FirstName,LastName];

section[1] = [class, year, dept];

那么我该如何将这些值放入数组中呢? 请帮帮我.

So how can i put the values into array like that. Please help me out.

谢谢

推荐答案

我建议创建一个自定义数据存储类.您可以将其命名为PDPerson.h.您还需要.m文件.对于每个属性，请执行以下操作:

I would recommend creating a custom data storage class. You could call it PDPerson.h You'll also need the .m file. For each property, do something like this:

在.h 中:这样声明每个属性:

In the .h: Declare each of your properties like so:

@interface PDPerson : NSObject{

}

@property(nonatomic, retain) NSString *firstName;
@property(nonatomic, retain) NSString *lastName;
@property(nonatomic, retain) NSString *class;//May want to consider renaming
@property(nonatomic, retain) NSString *year;
@property(nonatomic, retain) NSString *dept;

@end

然后在.m中:

@implementation
@synthesize firstName, lastName;
@synthesize class, year dept;

-(void)dealloc{
    [firstName release];
    [lastName release];
    [class release];
    [year release];
    [dept release];
}

每次您要在阵列中创建新的人"时，请执行以下操作:

Each time you want to create a new "Person" in your array, do this:

PDPerson *person = [[PDPerson alloc]init];

然后您可以轻松地设置对象的属性，如下所示:

You can then easily set the properties of the object like so:

person.firstName = @"John";
person.lastName = @"Smith";
person.class = @"Math";
person.year = @"1995";
person.dept = @"Sciences";

并检索它们:

firstNameLabel.text = person.firstName;

关于这些对象的好处是，您现在要做的就是将person对象添加到您的数组中:

The nice thing about these objects is that all you have to do now is add the person object to your array:

NSMutableArray *personArray = [[NSMutableArray alloc] init];
[personArray addObject:person];

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