How do you know zhe define of ‘_FBNSCFTimerInfoStruct’ ？

[zjutwhw]

typedef struct {
long _unknown; // This is always 1
id target;
SEL selector;
NSDictionary *userInfo;
} _FBNSCFTimerInfoStruct;

这个定义是怎么发现的？

[zjutwhw]

typedef struct {
long _unknown; // This is always 1
id target;
SEL selector;
NSDictionary *userInfo;
} _FBNSCFTimerInfoStruct;

Hi,,,How do you know zhe define of ‘_FBNSCFTimerInfoStruct’ ？ I am inquisitive！

[stevenxiaoyang]

I can not find it in apple source，so I guess it is tested...