Will import affect the local producer?

Yes ofcourse, if the producer country have the potential to produce the goods which are being imported. It will affect local producer, disturb an economy, BOP (Balance of payment) will go in negative if the imports increases than exports, it will affect economy of the country. following are the examples:

Local producer, BOP, Labour market, Raw materials provider etc etc

In my point of view  "definitely not" . they can't meet the entire local demand and

Most important thing their price will be less than the importer price.

Its  depend on the country to country   depends on the local market requirement  and  off course country of   origin 

Negative & positive effects. It will depend on the category of the local producer.For small scale producers like the farmers or  fishermen, they will definitely be affected as they can only sell locally.  On the other hand, for bigger scale producers specially companies, they can export their products. They can generate higher income and get opportunity to widen their distribution channels which shall of course result to a higher sales turnover.  In this case, the effect is beneficial. Plus the government will also benefit on exporting locally produced commodities.  

Import will affect ,If the producer depends to use any products or raw materials for production from out of local market.