声明，属性，合成，并实现INT []目标C数组 [英] Declaring, Properties, Synthesizing, and Implementing int[] array in Objective C

问题描述

你怎么申报，设置属性，合成，并实现规模5的目标C int数组？我写这篇code为iPhone应用程序。谢谢你。

How do you declare, set properties, synthesize, and implement an int array of size 5 in Objective C? I'm writing this code for an iphone app. Thanks.

推荐答案

我觉得可可-Y的事情做的是隐藏，即使你使用它内部的int数组。是这样的：

I think the "Cocoa-y" thing to do is hide the int array even if you use it internally. Something like:

@interface Lottery : NSObject {
    int numbers[5];
}

- (int)numberAtIndex:(int)index;
- (void)setNumber:(int)number atIndex:(int)index;
@end

@implementation Lottery

- (int)numberAtIndex:(int)index {
    if (index > 4)
    	[[NSException exceptionWithName:NSRangeException reason:[NSString stringWithFormat:@"Index %d is out of range", index] userInfo:nil] raise];
    return numbers[index];
}

- (void)setNumber:(int)number atIndex:(int)index {
    if (index > 4)
    	[[NSException exceptionWithName:NSRangeException reason:[NSString stringWithFormat:@"Index %d is out of range", index] userInfo:nil] raise];
    numbers[index] = number;
}

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