I'm planning to develop a native iOS app using Swift on Salesforce1. Any sample code/ guidance which shows how to fire the Salesforce REST API and render the response on UI will be helpful.
Please checkout the post at http://4loopers.io/developing-ios-apps-using-swift/ for the steps involved in building an iOS app using Swift from scratch.
The basic steps are: - Create a Swift Project in XCode
Download and set up your XCode project as outlined in https://github.com/forcedotcom/SalesforceMobileSDK-iOS-Distribution
In the Build Settings—>Header search paths add the paths for the Salesforce Mobile SDK
Add an Objective C file. It’ll ask if you want to configure a objective C bridging header. Click Yes and delete the Objective C file and just keep the birding header
Import the relevant headers from the Salesforce Mobile SDK
Set up Remote App in Salesforce and get the clientid and callback URL to be added to SFDCSettings.swift