从 NSDictionary 内部显示 NSArray 列表？

发布于 2025-01-08 01:21:59 字数 869 浏览 1 评论 0原文

我正在开发一个供个人使用的应用程序，该应用程序会随机显示相关单词的列表。

在这个社区的帮助下，我将相关单词列表放入 NSArrays 中。例如：

NSArray *catList = [NSArray arrayWithObjects:@"Lion", @"Snow Leopard", @"Cheetah", nil];
NSArray *dogList = [NSArray arrayWithObjects:@"Dachshund", @"Pitt Bull", @"Pug", nil]; 
...

我已将这些数组放入 NSDictionary 中：

 NSMutableDictionary *wordDictionary = [[NSMutableDictionary alloc] init];
        [wordDictionary setObject: catList forKey:@"Cats"];
        [wordDictionary setObject: dogList forKey:@"Dogs"]; 
...

我想做的是随机选择 NSDictionary 键之一并显示其数组中保存的 NSString 列表。显然 [wordDictionary objectForKey: @"Cats"]; 允许我访问设置为 Cats 键的 catList 数组，以显示数组中保存的字符串列表。但我想随机显示列表而不指定密钥。

我尝试了 [wordDictionary allKeys] 并且可以随机显示键的名称，但不能显示数组中保存的列表。

有没有人有任何从 NSDictionary 显示 NSArray 列表的指针？

非常感谢。

原文

I'm working on an app for personal use that displays lists of associated words randomly.

With help from this community I've put lists of associated words into NSArrays. For example:

NSArray *catList = [NSArray arrayWithObjects:@"Lion", @"Snow Leopard", @"Cheetah", nil];
NSArray *dogList = [NSArray arrayWithObjects:@"Dachshund", @"Pitt Bull", @"Pug", nil]; 
...

And I've put those arrays into an NSDictionary:

 NSMutableDictionary *wordDictionary = [[NSMutableDictionary alloc] init];
        [wordDictionary setObject: catList forKey:@"Cats"];
        [wordDictionary setObject: dogList forKey:@"Dogs"]; 
...

What I'd like to do is randomly select one of the NSDictionary keys and display the list of NSStrings held in its array. Obviously [wordDictionary objectForKey: @"Cats"]; allows me to access the catList array set to the Cats key to display the string list held in the array. But I'd like to display the lists randomly and without specifying the key.

I experimented with [wordDictionary allKeys] and could randomly display the name of a key but not the list held in the array.

Does anyone have any pointers for displaying an NSArray list from an NSDictionary?

Thanks very much.

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愿得七秒忆 2025-01-15 01:21:59

这是你想要的吗？

NSInteger keyCount = [[wordDictionary allKeys] count];
NSInteger randomKeyIndex = random() % keyCount;
NSString *randomKey = [[wordDictionary allKeys] objectAtIndex:randomKeyIndex];
NSArray *randomlySelectedArray = [wordDictionary objectForKey:randomKey];

Is this what you want?

NSInteger keyCount = [[wordDictionary allKeys] count];
NSInteger randomKeyIndex = random() % keyCount;
NSString *randomKey = [[wordDictionary allKeys] objectAtIndex:randomKeyIndex];
NSArray *randomlySelectedArray = [wordDictionary objectForKey:randomKey];

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