從程式製作國旗 俄羅斯和紐西蘭

我先從間單的開始做起，所以選了俄羅斯來練習，加上熟悉語法

然後我開始嘗試較為困難的紐西蘭，因為紐西蘭是我想去的國家之一，看看當地的火山、溫泉、冰河、湖泊，享受南半球的氣候

第一部分

製作出左上角英國的圖案，有許多前人製作的英國國旗，讓我在製作上快了一些，雖然算比例還是讓我頭痛了一下

再來是星星的部分

同樣也是非常感謝版上的同學，使我在學習如何繪製星星時困擾少了許多，因為紐西蘭上有白色星星和紅色星星，所以很想用function的方式，不過還不是很熟悉用法，索性就直接寫下去，然後我在做星星時才發現 .append不然可以省下一些不必要的程式碼了，最後紐西蘭國旗不是完美的100%一模一樣，但還是有開心一下下。

附上程式碼

import UIKit
//俄羅斯
var rect1 = CGRect(x: 0, y: 0, width: 300, height: 210)
let backgroundView1 = UIView(frame: rect1)
backgroundView1.backgroundColor = UIColor(red: 1, green: 1, blue: 1, alpha: 1)
rect1 = CGRect(x: 0, y: 70, width: 300, height: 70)
let blue = UIView(frame: rect1)
blue.backgroundColor = UIColor(red: 0, green: 57.0/255.0, blue: 166.0/255.0, alpha: 1)
rect1 = CGRect(x: 0, y: 140, width: 300, height: 70)
let red = UIView(frame: rect1)
red.backgroundColor = UIColor(red: 213.0/255.0, green: 43.0/255.0, blue: 30.0/255.0, alpha: 1)
backgroundView1.addSubview(blue)
backgroundView1.addSubview(red)
// 紐西蘭
// 藍底
var flag = CGRect(x: 0, y: 0, width: 240, height: 120)
let flagbackgroundView = UIView(frame: flag)
flagbackgroundView.backgroundColor = UIColor(red: 0, green: 38/255, blue: 127/255, alpha: 1)
//白色部分
var white = CGRect(x: 0, y: 0, width: 120, height: 60)
let whiteView = UIView(frame: white)
whiteView.backgroundColor = UIColor(red: 1, green: 1, blue: 1, alpha: 1)
flagbackgroundView.addSubview(whiteView)
let Path = UIBezierPath()
var point = CGPoint(x: 0, y: 0)
Path.move(to: point)
point = CGPoint(x: 13.2, y: 0)
Path.addLine(to: point)
point = CGPoint(x: 120, y: 53.4)
Path.addLine(to: point)
point = CGPoint(x: 120, y: 60)
Path.addLine(to: point)
point = CGPoint(x: 106.8, y: 60)
Path.addLine(to: point)
point = CGPoint(x: 0, y: 6.6)
Path.addLine(to: point)
Path.close()
let Layer = CAShapeLayer()
Layer.path = Path.cgPath
whiteView.layer.mask = Layer
var white1 = CGRect(x: 0, y: 0, width: 120, height: 60)
let whiteView1 = UIView(frame: white1)
whiteView1.backgroundColor = UIColor(red: 1, green: 1, blue: 1, alpha: 1)
flagbackgroundView.addSubview(whiteView1)
let Path1 = UIBezierPath()
var point1 = CGPoint(x: 106.8, y: 0)
Path1.move(to: point1)
point1 = CGPoint(x: 120, y: 0)
Path1.addLine(to: point1)
point1 = CGPoint(x: 120, y: 6.6)
Path1.addLine(to: point1)
point1 = CGPoint(x: 13.2, y: 60)
Path1.addLine(to: point1)
point1 = CGPoint(x: 0, y: 60)
Path1.addLine(to: point1)
point1 = CGPoint(x: 0, y: 53.4)
Path1.addLine(to: point1)
Path1.close()
let Layer1 = CAShapeLayer()
Layer1.path = Path1.cgPath
whiteView1.layer.mask = Layer1
var white2 = CGRect(x: 0, y: 0, width: 120, height: 60)
let whiteView2 = UIView(frame: white2)
whiteView2.backgroundColor = UIColor(red: 1, green: 1, blue: 1, alpha: 1)
flagbackgroundView.addSubview(whiteView2)
let Path2 = UIBezierPath()
var point2 = CGPoint(x: 49.5, y: 0)
Path2.move(to: point2)
point2 = CGPoint(x: 69.3, y: 0)
Path2.addLine(to: point2)
point2 = CGPoint(x: 69.3, y: 60)
Path2.addLine(to: point2)
point2 = CGPoint(x: 49.5, y: 60)
Path2.addLine(to: point2)
Path2.close()
let Layer2 = CAShapeLayer()
Layer2.path = Path2.cgPath
whiteView2.layer.mask = Layer2
var white3 = CGRect(x: 0, y: 0, width: 120, height: 60)
let whiteView3 = UIView(frame: white3)
whiteView3.backgroundColor = UIColor(red: 1, green: 1, blue: 1, alpha: 1)
flagbackgroundView.addSubview(whiteView3)
let Path3 = UIBezierPath()
var point3 = CGPoint(x: 0, y: 19.6)
Path3.move(to: point3)
point3 = CGPoint(x: 120, y: 19.6)
Path3.addLine(to: point3)
point3 = CGPoint(x: 120, y: 39.6)
Path3.addLine(to: point3)
point3 = CGPoint(x: 0, y: 39.6)
Path3.addLine(to: point3)
Path3.close()
let Layer3 = CAShapeLayer()
Layer3.path = Path3.cgPath
whiteView3.layer.mask = Layer3
flagbackgroundView
var red1 = CGRect(x: 0, y: 0, width: 120, height: 60)
let redView1 = UIView(frame: red1)
redView1.backgroundColor = UIColor(red: 210.0/255.0, green: 16.0/255.0, blue: 52.0/255.0, alpha: 1)
flagbackgroundView.addSubview(redView1)
let Path4 = UIBezierPath()
var point4 = CGPoint(x: 52.8, y: 0)
Path4.move(to: point4)
point4 = CGPoint(x: 66.6, y: 0)
Path4.addLine(to: point4)
point4 = CGPoint(x: 66.6, y: 60)

參考資料：

Swift iOS App | 作業#6–2 英國國旗 | 從程式製作國旗圖案

從程式製作國旗－🇺🇸美國🇺🇸

利用 CAShapeLayer 和 mask 將 View 變成任意形狀