Update README.md

Add a section for Swift programming on Raspberry Pi

Author: haikieu

README.md

@@ -213,6 +213,12 @@ The complete collection of (consumer) Raspberry Pi models consist of:
 - [Auto Mount USB](https://medium.com/@anshul.ahu/guide-to-setup-auto-mount-usb-on-raspberry-pi-4f343761627f) - Guide to setup Auto Mount USB on Raspberry Pi.
 - [DC++ Hub](https://medium.com/@anshul.ahu/guide-to-setup-an-adc-dc-hub-on-raspberry-pi-4dbf86ca8547) - Guide to setup an ADC (DC++) Hub on Raspberry Pi.
 
+### Swift programming on Raspberry Pi
+- [Setup Swift environment on Raspbian](https://swiftreviewer.com/2018/12/21/swift-programming-on-raspberry-pi-part-2-3/) - A quick guide to help setup Swift enviroment on Raspbian Strech Lite OS
+- [Compile Swift for Raspberry Pi by XCode](https://swiftreviewer.com/2018/12/25/compile-swift-for-raspberry-pi-by-xcode/) - A quick tutorial to share the way to help setup for compiling code for Raspberry Pi by XCode
+- [SwiftyGPIO](https://github.com/uraimo/SwiftyGPIO) - A Swift library for hardware projects on Linux/ARM boards with support for GPIOs/SPI/I2C/PWM/UART/1Wire.
+- [BuildSwiftOnARM](https://github.com/uraimo/buildSwiftOnARM) - All you need to build Swift on a RaspberryPi or other ARM boards, updated to Swift 4.1.3
+
 ## Community
 
 - [Official Forum](https://www.raspberrypi.org/forums/)