iphone - Error on Xcode 4.3.2

Question

I am new on iphone programming.. I keep getting the error and I have no idea how to change the permission for SQLite

Error while updating. attempt to write a readonly database

and the following is my coding

NSString *filePath = [[NSBundle mainBundle]pathForResource:@"card" ofType:@"sqlite"];
sqlite3_stmt *statement;

if(sqlite3_open([filePath UTF8String], &db) == SQLITE_OK)
{
  const char *query_stmt = "UPDATE card SET isActivate =?";
  if(sqlite3_prepare_v2(db, query_stmt, -1, &statement, NULL) != SQLITE_OK)
     {
         NSAssert1(0, @"Error while creating update statement. '%s'", sqlite3_errmsg(db));
     }
}


sqlite3_bind_int(statement, 1, 1);
if(SQLITE_DONE != sqlite3_step(statement))
   {
      NSLog(@"Error while updating. %s", sqlite3_errmsg(db));
    }

sqlite3_finalize(statement);
sqlite3_close(db);

Hope someone could help me because this really makes me feel frustrated..

Answer 1

您需要将 sql 文件复制到缓存目录才能正确使用它。
这是我的一些代码：

NSString *sqlFile = @"database.sql";
NSArray *cachePath= NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
NSString *cacheDir = [cachePathobjectAtIndex:0];
databasePath = [cacheDirstringByAppendingPathComponent:sqlFile];

NSFileManager *fileManager = [NSFileManager defaultManager];
// Copy the database sql file from the resourcepath to the documentpath
if (![fileManager fileExistsAtPath:databasePath]) {
    NSString *databasePathFromApp = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:sqlFile];
    NSError *error;
    [fileManager copyItemAtPath:databasePathFromApp toPath:databasePath error:&error];
    if (error != nil) {
        NSLog(@"[Database:Error] %@", error);
    }
}