如何将 NSArray 存储在 NSDictionary 中？

发布于 2024-09-08 10:22:26 字数 560 浏览 2 评论 0原文

我正在尝试自学，但正在努力解决如何在 NSDictionary 中存储 NSArray 等内容。

假设你有一个用于食谱的 NSDictionary：

假设 NSDictionary 有这样的键：

Spaghetti，阿尔弗雷多宽面条，烤鸡肉沙拉

NSDictionary 有一个 NSArray，它只是一个成分列表。

我想等效的 PHP 代码将类似于：

$['Spaghetti'] = array('Spaghetti Pasta', 'Spaghetti Sauce', 'Meatballs');
$['Fettucine Alfredo'] = array('Fettucine Pasta', 'Alfredo Sauce');
$['Grilled Chicken Salad'] = array('Lettuce', 'Grilled Chicken', 'Croutons');

我正在努力解决如何将 NSArray 添加到 NSDictionary 的问题。那么如果我想删除一个元素或向数组添加一个元素怎么办？如何检索、删除或添加它？

原文

I'm trying to teach myself but am struggling with how to store something like an NSArray inside an NSDictionary.

Let's say hypothetically you had a NSDictionary for recipes:

Let's say the NSDictionary had keys like:

Spaghetti,
Fettucine Alfredo,
Grilled Chicken Salad

And the NSDictionary had an NSArray which was simply a list of ingredients.

I suppose the equivalent PHP code would be something like:

$['Spaghetti'] = array('Spaghetti Pasta', 'Spaghetti Sauce', 'Meatballs');
$['Fettucine Alfredo'] = array('Fettucine Pasta', 'Alfredo Sauce');
$['Grilled Chicken Salad'] = array('Lettuce', 'Grilled Chicken', 'Croutons');

I'm struggling with how I can add an NSArray to the NSDictionary. Then what if I wanted to remove an element or add an element to the array? How is it retrieved and deleted or added to?

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

心的憧憬 2024-09-15 10:22:26

NSDictionary* dict = [NSDictionary dictionaryWithObjectsAndKeys:
  [NSArray arrayWithObjects:@"Spaghetti Pasta", @"Tomato Sauce", nil], @"Spaghetti",
  [NSArray arrayWithObjects:@"Fettuccine Pasta", @"Alfredo Sauce", nil], @"Fettuccine Alfredo",
  [NSArray arrayWithObjects:@"Lettuce", @"Grilled Chicken", @"Croutons", nil], @"Grilled Chicken Salad",
  nil];

您可以将任何对象类型作为值添加到字典中。有关词典的更多信息，请参阅文档。

NSDictionary* dict = [NSDictionary dictionaryWithObjectsAndKeys:
  [NSArray arrayWithObjects:@"Spaghetti Pasta", @"Tomato Sauce", nil], @"Spaghetti",
  [NSArray arrayWithObjects:@"Fettuccine Pasta", @"Alfredo Sauce", nil], @"Fettuccine Alfredo",
  [NSArray arrayWithObjects:@"Lettuce", @"Grilled Chicken", @"Croutons", nil], @"Grilled Chicken Salad",
  nil];

You can add any object type to a dictionary as a value. For more on dictionaries, see the documentation.

回复收藏 0 原文

~没有更多了~