Sebul 键盘的韩文自动机 https://itunes.apple.com/en/app/id428835384?mt=8
$ open App/HangulSwift.xcodeproj
let system = HangulInputSystem()
system.input(Jamo(type: .초, sound: "ㄱ"))
XCTAssertEqual("ㄱ", system.text)
system.input(Jamo(type: .중, sound: "ㅏ"))
XCTAssertEqual("가", system.text)
system.input(Jamo(type: .종, sound: "ㅁ"))
XCTAssertEqual("감", system.text)