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我在func draw(_ dirtyRect:NSRect)方法中有以下代碼,但是即使應該隨機化,所有線條也使用相同顏色繪製。我讀到它可能與fps有關,但有沒有辦法如何繪製它多彩? 感謝您的任何提示。在循環中爲NSBezierPath繪製多種顏色
for y in 1...3 {
for x in 1...20 {
switch arc4random_uniform(5) {
case 0:
color = NSColor.red
case 1:
color = NSColor.purple
case 2:
color = NSColor.green
case 3:
color = NSColor.blue
case 4:
color = NSColor.yellow
default:
color = NSColor.yellow
}
point.move(to: NSPoint(x: x*10, y: y))
point.line(to: NSPoint(x: x*10, y: y+100))
color.setStroke()
point.stroke()
}
}