我正在尝试从 TableView 中删除数据。数据来自数据库。
if (editingStyle == UITableViewCellEditingStyleDelete) {
DetailData *datatoDelete;//=[DetailData new];
datatoDelete= dataArray[indexPath.row];
NSLog(@"ID at selected row is %@",datatoDelete.ID);
NSString *docsDir;
NSArray *dirPaths;
// Get the documents directory
dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
docsDir = dirPaths[0];
// Build the path to the database file
databasePath = [[NSString alloc]
initWithString: [docsDir stringByAppendingPathComponent:
@"MYDat.db"]];
const char *dbpath = [databasePath UTF8String];
sqlite3_stmt *statement;
if (sqlite3_open(dbpath, &myDatabase) == SQLITE_OK)
{
NSString *querySQL = [NSString stringWithFormat:@"DELETE FROM ABC WHERE ID=%@",datatoDelete.ID];
// i tried ID='%@' too
const char *query_stmt = [querySQL UTF8String];
if (sqlite3_prepare_v2(myDatabase, query_stmt, -1, &statement, NULL) == SQLITE_OK)
{
NSLog(@"statement deleted successfully"); // i am seeing this statement when i click delete
}
sqlite3_finalize(statement);
sqlite3_close(myDatabase);
}
// [dataArray removeObjectAtIndex:indexPath.row];
[tableView reloadData];
}
这里当我点击删除时，我得到“语句数据删除成功”但是，当我在删除操作后检查数据库文件时，数据仍然存在。谁能告诉我这里有什么问题吗？
最佳答案
sqlite3_prepare_v2只准备一条语句，需要使用sqlite3_step来执行。
if (sqlite3_prepare_v2(myDatabase, query_stmt, -1, &statement, NULL) == SQLITE_OK)
{
if(sqlite3_step(statement) == SQLITE_DONE)
{
NSLog(@"statement deleted successfully");
}
}
供引用:
关于ios - 无法从 sqlite 中删除我的 TableView 中的行数据，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/27537133/