Question

我遇到了破坏.mbtiles文件的异常问题，这需要MapBox。如果文件坏了，初始化MapBox视图时：

self.mapView = [[RMMapView alloc] initWithFrame:self.frame andTilesource:self.tilesStandard];

我收到错误：调用sqlite3_step的未知错误（11：数据库磁盘映像格式错误）rs

我该怎么做才能发现这个错误？

更新我通过直接使用SQLite库打开MBTiles来测试它来解决问题，建议 incanus ：

- (BOOL)isReadableDatabase:(sqlite3 *)database {
   BOOL result = YES;
   sqlite3_stmt* statement;
   char * errmsg;
   NSString *query = @"SELECT name FROM sqlite_master WHERE type=\'table\'";

   if ( sqlite3_prepare_v2(database, query.UTF8String, -1, &statement, NULL) == SQLITE_OK ) {

      while(sqlite3_step(statement) == SQLITE_ROW ) {
         NSString *tableName = [NSString stringWithCString:(const char *)sqlite3_column_text(statement, 0) encoding:NSUTF8StringEncoding];
         NSString *query_table = format(@"SELECT * FROM %@", tableName);

         if (sqlite3_exec(database, query_table.UTF8String, NULL, NULL, &errmsg) != SQLITE_OK) {
            DLog(@"The map is corrupted with sql error: %s", sqlite3_errmsg(database))
            sqlite3_close(database);
            result = NO;
            break;
         }
      }
}

   sqlite3_clear_bindings(statement);
   sqlite3_finalize(statement);

   return result;
}

Answer 1

我建议您尝试直接使用FMDB或SQLite库来打开MBTiles以首先测试。两者都应该有调用，让您在将它们传递给更高级别的库之前确定事情是否成功。

损坏的MapBox文件（.mbtiles）的捕获错误

1 个答案: