将数组嵌套到NSDictionary对象（Objective-C） [英] Nesting arrays into NSDictionary object (Objective-C)

问题描述

我想使用NSDictionary定义任务，我想保存在plist文件中（到目前为止，我还没有运行Core Data），但是遇到了两个问题：

I would like to define tasks using NSDictionary, which I'd like to save in a plist file (I didn't have much luck with Core Data so far), but got stuck at two points:

当使用 initWithObjectsAndKeys：我可以使用NSDate的 numberWithInt更改数据类型为数字或布尔值： 和 numberWithBool：方法。我似乎找不到方法来改变类型到日期虽然。我在文档中找不到类似的东西。

-- When using initWithObjectsAndKeys: I can change the data type to number or boolean, using NSDate's numberWithInt: and numberWithBool: methods, respectively. I can't seem to find the method to change the type to date though. I couldn't find anything like that in the documentation.

- 我碰到的第二个问题是嵌套数组。我如何将它们添加到字典？

-- The second problem I ran into was with the nested arrays. How can I add them to the dictionary?

我已将图片上传到这里我想要实现的。提前感谢！

I have uploaded a picture to here of what I am trying to achieve. Thank you in advance!

推荐答案

您的意思是 NSNumber code> + numberWithInt：和 + numberWithBool：方法，而不是 NSDate ？它是定义这些方法的NSNumber。

Do you mean NSNumber's +numberWithInt: and +numberWithBool: methods, not NSDate? It's NSNumber that defines those methods.

要将数字转换为日期，它实际上取决于数字是多少。如果是UNIX时间戳，则 [NSDate dateWithTimeIntervalSince1970：theTimestampInSeconds] 。

To convert a number to a date, it really depends on what the number is. If it's a UNIX timestamp, then [NSDate dateWithTimeIntervalSince1970:theTimestampInSeconds].

至于添加 NSArray 对象到字典：

[yourDictionary setObject:yourArray forKey:@"SomeKey"];

如果您需要更多帮助，您需要发布一些代码，因为您的问题不是很清楚。

You'll have to post some code if you need more help as your question isn't very clear.

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