我有一个NSDictionary,有六个对象,以及键a、b、c…等等。我正在做的是通过它们的键删除三个对象,我不知道要删除什么对象,因为它们是由用户输入决定的,所以我可以留下a、d和e。如果这是一个数组,我可以使用objectAtIndex访问剩下的对象,但我不知道怎样才能查到字典里剩下的这三个对象。
看看我想在这里做什么,这似乎有点令人困惑,但例如,我想要那些带有键a、d和e的剩余对象,但我不知道它们的键,所以我需要另一种访问它们的方法。
我有一个NSDictionary,有六个对象,以及键a、b、c…等等。我正在做的是通过它们的键删除三个对象,我不知道要删除什么对象,因为它们是由用户输入决定的,所以我可以留下a、d和e。如果这是一个数组,我可以使用objectAtIndex访问剩下的对象,但我不知道怎样才能查到字典里剩下的这三个对象。
看看我想在这里做什么,这似乎有点令人困惑,但例如,我想要那些带有键a、d和e的剩余对象,但我不知道它们的键,所以我需要另一种访问它们的方法。
-[NSDictionary allValues]
将获取所有值。或者马丁的建议,如果你想要所有的钥匙。
只需在字典上使用allKeys
方法,即可返回NSArray*
。
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