如何焦炭修復這個錯誤，NSString的

Question

我試圖把保存因爲我不能使用的路徑「/子文件夾」的經修改的路徑NSString的 我的代碼是：

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需要轉換爲C字符串，然後才能將它們包含在argv陣列中。

做到這一點：

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);`