nsmutable 数组中字段的动态命名？

发布于 2024-11-17 03:55:51 字数 462 浏览 0 评论 0原文

我希望我能清楚地解释这一点。我有一个 NSMutableArray * myMut。我有 NSString * anyoldString 形式的用户输入。 我有用户输入的一些数值存储在变量 someNumber 中；

当用户输入字符串和值时，我想更新 myMut，并将字段命名为 anyoldString，

如下所示：myMut.anyoldString=someNumber; 根据用户的输入，名称会有所不同，当然

我是 Objective C 的新手。

在 Matlab 中，我会这样做：

myMut.(anyoldString)=someNumer.

我知道这对于目标 c 来说太简单了！但有什么快速的方法可以做到这一点吗？

原文

I hope i can explain this clearly.
I have a NSMutableArray * myMut.
I have user input in the form of an NSString * anyoldString.
I have user input of some numeric values stored in the variable someNumber;

As users input their string and values, I want to update myMut, and name the fields anyoldString

like this: myMut.anyoldString=someNumber;
depending on the user's input, the name will be different of course

i'm new to objective c.

in Matlab, I would do this:

myMut.(anyoldString)=someNumer.

I know that's too easy for objective c! but any fast way to do this??

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唱一曲作罢 2024-11-24 03:55:51

你可能会想做这样的事情：

NSMutableDictionary *myMutableDictionary; // A mutable **dictionary**, not an array!
NSInteger someNumber; // filled by the number
NSString *key; // filled by anyOldString

[myMutableDictionary setObject:[NSNumber numberWithInteger:someNumber] forKey:key];

NSArray 和朋友不是关联的；但已编入索引。你想要的是 NSDictionary 和朋友们；您友好的邻居键值映射！

编辑：用于娱乐；给定任何旧字符串，获取某个数字：

NSMutableDictionary *myMutableDictionary; // The same dictionary as above
NSInteger someNumber; // out number
NSString *key; // filled by anyOldString

NSNumber *storedNumber = [myMutableDictionary objectForKey:key];

if (storedNumber) {
  someNumber = [storedNumber integerValue];
} else {
  someNumber = APPLICATION_APPROPRIATE_DEFAULT_VALUE;
}

You'll probably want to do something like so:

NSMutableDictionary *myMutableDictionary; // A mutable **dictionary**, not an array!
NSInteger someNumber; // filled by the number
NSString *key; // filled by anyOldString

[myMutableDictionary setObject:[NSNumber numberWithInteger:someNumber] forKey:key];

NSArray and friends aren't associative; but indexed. What you want is NSDictionary and friends; your friendly neighborhood key-value mapping!

Edit: For funsies; getting someNumber back out, given anyOldString:

NSMutableDictionary *myMutableDictionary; // The same dictionary as above
NSInteger someNumber; // out number
NSString *key; // filled by anyOldString

NSNumber *storedNumber = [myMutableDictionary objectForKey:key];

if (storedNumber) {
  someNumber = [storedNumber integerValue];
} else {
  someNumber = APPLICATION_APPROPRIATE_DEFAULT_VALUE;
}

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