- iOS.playground Select all
import UIKit
import PlaygroundSupport
//: **Markup**
//: ### Define UIView
class MyView : UIView {
@objc public func changeTitle(_ sender:UIButton!) {
sender.setTitle("Welcome to WWDC2018", for: [])
}
}
let myView = MyView(frame: CGRect(x:0, y:0, width:500, height:500))
var button = UIButton(type: .system)
button.frame = CGRect(x:100, y:100, width:300, height:200)
button.setTitle("Hi Press me!", for: [])
button.tintColor = .blue
button.setTitleColor(.orange, for: [])
button.addTarget(myView, action: #selector(MyView.changeTitle(_:)), for: .touchUpInside)
myView.addSubview(button)
PlaygroundPage.current.liveView = myView
Playground Icon Drawings in iOS and Swift 4.2
- macOS.playground Select all
import UIKit
//: Define IconView
class IconView: UIView {
override func draw(_ rect: CGRect) {
drawRawBackgroundWithBaseColor(strokeColor: UIColor.orange, backgroundRectangle: self.bounds)
let textAttributes: [NSAttributedString.Key : Any] = [
NSAttributedString.Key.foregroundColor: UIColor.red,
NSAttributedString.Key.font: UIFont.systemFont(ofSize: 32.0)]
let FString: String = "Hello World"
let distanceX: CGFloat = -12.0
let distanceY: CGFloat = 0.0
let centerX = self.bounds.midX
let centerY = self.bounds.midY
FString.draw(at: CGPoint(x:centerX+distanceX, y:centerY+distanceY), withAttributes: textAttributes)
}
}
func drawRawBackgroundWithBaseColor(strokeColor: UIColor, backgroundRectangle:CGRect) {
let lineWidth = backgroundRectangle.width/36.0
let cornerRadius = backgroundRectangle.width/16.0
let tileRectangle = backgroundRectangle.insetBy(dx: lineWidth/2.0, dy: lineWidth/2.0)
// Stroke Drawing
let strokePath = UIBezierPath(roundedRect:tileRectangle, cornerRadius:cornerRadius)
strokeColor.setStroke()
strokePath.lineWidth = lineWidth
strokePath.stroke()
// Draw an ellipse
let ovalPath = UIBezierPath(ovalIn: backgroundRectangle.insetBy(dx: lineWidth*1.5, dy: lineWidth*1.5))
UIColor.blue.setStroke()
ovalPath.lineWidth = lineWidth
ovalPath.stroke()
let context:CGContext = UIGraphicsGetCurrentContext()!
context.setFillColor(UIColor.green.cgColor)
context.addRect(CGRect(x: 100.0, y: 100.0, width: 60.0, height: 60.0))
context.fillPath()
}
//: Instantiate the UIView
let rect = CGRect(x: 0.0, y: 0.0, width: 420.0, height: 320.0)
let icon = IconView(frame: rect)
icon.backgroundColor = UIColor.clear
CreateML for macOS 10.14 Beta 1 (requires macOS 10.14 Mojave)
- macOS.playground Select all
import Cocoa
import CreateML
//: Specify Data
/*
Input as CSV
mycsv.csv:
beds,baths,squareFt, price
2,2,2000,400000
4,3,2500,500000
3,2,1800,450000
3,2,1500,300000
let houseData = try MLDataTable(contentsOf: URL(fileURLWithPath: "mycsv.csv"))
*/
//: Input as dictionary
let mydata : [String: MLDataValueConvertible] = [
"beds": [2,4,3,3],
"baths": [2,3,2,2],
"squareFt": [2000,2500,1800,1500],
"price": [400000,500000,450000,300000]
]
let houseData = try MLDataTable(dictionary:mydata)
let (trainingData, testData) = houseData.randomSplit(by: 0.8, seed: 0)
//: Create Model
let pricer = try MLRegressor(trainingData: houseData, targetColumn: "price")
//: Evaluate Model
let evalator = pricer.evaluation(on: testData)
print(pricer)
//: Save Model
try pricer.write(to:URL(fileURLWithPath: "HousePricer.mlmodel"))
