问题
I used a simple NSLog on a dictionary:
NSLog(@"dict %@", dictionary);
the result was:
...
"first_name" = Peter;
gender = male;
id = 1171548848;
"last_name" = Lapisu;
...
Why are some key names in "quotes" and some not?
回答1:
When the string has characters apart from alphabets + numerics, it will quote the string.
This is the basic methodology of the description function.
来源：https://stackoverflow.com/questions/11538371/description-of-nsdictionary-why-are-some-key-names-with-quotes