NSLog

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我发现最后一个单词用双引号显示。但为什么？

I found that last word showed with double quotes. But why?

NSDictionary *guide2 = [NSDictionary dictionaryWithObjectsAndKeys:kArr, @"Kate", aArr, @"Ana-Lucia", kArr, @"John", nil]; NSArray *array = [guide2 allKeys]; NSLog(@"%@", [array description]);

输出：

( John, Kate, "Ana-Lucia" )

推荐答案

似乎因为中的特殊字符 - c> Ana-Lucia ，它在双引号内显示​​。可能是因为表示键是一个单词。如果你的密钥只包含 alphabets ，如AnaLucia，那么它将显示它而不带引号。

It seems that because of the special character - in the key Ana-Lucia, it displays it within double-quotes. May be this is because to show that the key is a single word. If your key contains only alphabets like "AnaLucia", then it will display it without quotes.

关键是如果它包含 alphabets 以外的任何字符，则以双引号显示，即使它是下划线（_）或空格。

The key is displayed in double-quotes if it contains any characters other than alphabets, even if it is an underscore(_) or space.