如何在NSData中打包struct？

Question

  

可能重复：
  Send and receive NSData via GameKit

我有一个struct，它由int变量和2个float指针（数组）组成。我如何打包这个结构ib NSData，然后解压缩它？

Answer 1

您可以使用dataWithBytes方法打包结构pf NSData：

struct aStruct {
/* Implementation */
};

//Struct variable 
aStruct exampleStruct;

// pack the struct into an NSData Object
NSData *myData = [NSData dataWithBytes:&exampleStruct length:sizeof(exampleStruct)];

// get back the the struct from the object
[myData getBytes:&exampleStruct length:sizeof(exampleStruct)];