ios - Why objective-c NS_ENUM variable automatically have default value -

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i created enum this

typedef ns_enum(nsinteger, permissionstages) {     thepermissionnotdetermine = 0,     thepermissiondenied = 1,     thereminderpermissionallowed = 2, };

and create variable this

permissionstages permissionstagevar;

i have not assign value it, default variable has permissionstages enum first value, in case thepermissionnotdetermine

why behavior?

the line:

permissionstages permissionstagevar;

is getting default value of 0. similar line:

nsstring *foo;

resulting in foo having initial value of nil. or

bool abool;

resulting in abool having initial value of no.

the variables initialized value of "0".

since enum happens have value 0, variable appears initialized thepermissionnotdetermine.


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