iphone - 重新启动应用程序后，Sqlite插入丢失

Question

这是插入代码。直到我关闭应用程序并再次启动它，然后所有更改都消失了，它才能正常工作。我没有看到任何错误，这可能是某些特定于iPhone的问题吗？

const char *sql = "INSERT INTO offers "
                  "(OfferId, AddressId, ShortDescription, LongDescription, TimeStart, TimeEnd, Created, LastEdit) "
                  " VALUES (?, ?, ?, ?, ?, ?, ?, ?)";


sqlite3_stmt *stmt;
int returnValue = sqlite3_prepare(db, sql, -1, &stmt, NULL);
if(returnValue == SQLITE_OK) {
    for(NSDictionary *offer in offers) {
        sqlite3_bind_int(stmt, 1, [[offer valueForKey:@"OfferId"] intValue]);
        sqlite3_bind_int(stmt, 2, [[offer valueForKey:@"AddressId"] intValue]);
        sqlite3_bind_text(stmt, 3, [[offer valueForKey:@"ShortDescription"] UTF8String], -1, SQLITE_TRANSIENT);
        sqlite3_bind_text(stmt, 4, [[offer valueForKey:@"LongDescription"] UTF8String], -1, SQLITE_TRANSIENT);
        sqlite3_bind_int(stmt, 5, [[offer valueForKey:@"TimeStart"] intValue]);
        sqlite3_bind_int(stmt, 6, [[offer valueForKey:@"TimeEnd"] intValue]);
        sqlite3_bind_int(stmt, 7, [[offer valueForKey:@"Created"] intValue]);
        sqlite3_bind_int(stmt, 8, [[offer valueForKey:@"LastEdit"] intValue]);

        if(sqlite3_step(stmt) != SQLITE_DONE)
            NSLog(@"instertOffers -> sql-error: %s", sqlite3_errmsg(db));
        else
            NSLog(@"added offer with id: %@", [offer valueForKey:@"OfferId"]);

        sqlite3_reset(stmt);
    }
} else {
    NSLog(@"instertOffers -> sql-error: %s", sqlite3_errmsg(db));
}

sqlite3_finalize(stmt);
sqlite3_close(db);

Answer 1

是AppBundle中的SQLite数据库文件，如果要进行更改，则需要将其复制到文档目录中。
您无法写入应用程序捆绑包中的任何文件。