Vaux's Swift

A simple demonstration of healthy async programming practices using Swift that shows how to integrate the New Relic SDK for iOS and trace native Swift methods.

This code is discussed in detail on the New Relic blog: http://blog.newrelic.com/2014/06/12/instrumenting-swift-app/

Getting started

1. Clone this repo
2. Open vaux_s_swift.xcodeproj in XCode 6
3. Open AppDelegate.swift and insert your New Relic App Token
4. Build and run the app in the iOS 8 simulator

Features of Interest

Initializing New Relic from Swift code

AppDelegate.swift includes an example of calling the New Relic initialization code from a Swift app delegate.

ImageFetcher

Vaux's Swift includes an implementation of an asynchronous image downloader called ImageFetcher. ImageFetcher handles the work of downloading an image from a URL, creating a UIImage from the downloaded data, and updating the content of a UIImageView instance. This example uses NSURLConnection's async API, blocks, and NROperationQueues to load images in parallel without blocking the application's UI thread.

See ImageFetcher.swift for the implementation.

Simplifying interacting with an Objective-C library

Vaux's Swift includes a NRMethodTimer class that makes it easy to instrument methods in your Swift code.

See NRHelpers.swift for the implementation. Examples of using NRMethodTimer are shown in ViewController.swift and ImageFetcher.swift