如何焦炭修复这个错误，NSString的

Question

我试图把保存因为我不能使用的路径“/子文件夹”的经修改的路径NSString的 我的代码是：

NSString *bath =[NSString stringWithFormat:@"%@/path", path]; 
pid_t pid; 
int status; 
const char *argv[] = {"mkdir", bath, NULL}; 
posix_spawn(&pid, "/bin/mkdir", NULL, NULL, (char* const*)argv, NULL); 
waitpid(pid, &status, WEXITED);` 

https://i.stack.imgur.com/0ws5N.jpg

Answer 1

NSStrings需要转换为C字符串，然后才能将它们包含在argv阵列中。

做到这一点：

NSString *bath =[NSString stringWithFormat:@"%@/path", path]; 
const char *cBath = [bath UTF8String]; 
if (cBath == NULL) 
{ 
    print("cBath is null ; why is path also null?"); 
    return; 
} 
pid_t pid; 
int status; 
const char *argv[] = {"mkdir", cBath, NULL}; 
posix_spawn(&pid, "/bin/mkdir", NULL, NULL, (char* const*)argv, NULL); 
waitpid(pid, &status, WEXITED);`