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我真的很難讓顏色選擇器工作。之後，我無法得到它的任何信息委託回電話我嘗試了以下內容：試圖讓顏色選擇器在Swift 2.0中工作
命名爲VCColorPicker.swift連接到HSBColorPicker.swift一個UIViewController的UIView
的UIViewController。
以下是代碼以VCColorPicker.swift（UIViewController中）
import UIKit
class VCColorPicker :UIViewController {
@IBOutlet weak var LabelColor: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
print("VCColorPicker loaded")
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
的目標是，我收到通過點擊的UIView被寫入負的把標籤「LabelColor」的BACKGROUNDCOLOR顏色在VCColorPicker上。
不幸的是，兩個問題突然出現：首先，窗口沒有用我嘗試填充LabelColor的最後一行進行構建。 （應用程序不生成）如果我把它拿出來VCColorPicker的屏幕將不會加載給出以下錯誤代碼。
2016-02-17 22：47：27.798 MagicACC [13202：2720420] Interface Builder文件中的未知類HSBColorPicker。 VCColorPicker已加載 2016-02-17 22:47:27806 MagicACC [13202：2720420] *由於未捕獲的異常'NSInvalidArgumentException'而終止應用程序，原因：'* -CGColor未爲UIColor定義;需要先轉換顏色空間。'
這裏的代碼HSBColorPicker，我在這裏找到了頁面，並嘗試適應。
import UIKit
internal protocol HSBColorPickerDelegate : NSObjectProtocol {
func HSBColorColorPickerTouched(sender:HSBColorPicker, color:UIColor, point:CGPoint, state:UIGestureRecognizerState)
}
@IBDesignable
class HSBColorPicker: UIView {
@IBInspectable var elementSize: CGFloat = 1.0 {
didSet {
setNeedsDisplay()
}
}
private func initialize() {
print("HSCColorPicker loaded - initialize start")
self.clipsToBounds = true
let touchGesture = UILongPressGestureRecognizer(target: self, action: "touchedColor:")
touchGesture.minimumPressDuration = 0
touchGesture.allowableMovement = CGFloat.max
self.addGestureRecognizer(touchGesture)
print("HSCColorPicker loaded - initialize stop")
}
override init(frame: CGRect) {
super.init(frame: frame)
initialize()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
initialize()
}
override func drawRect(rect: CGRect) {
print("HSCColorPicker loaded - drawRect start")
let context = UIGraphicsGetCurrentContext()
for var y = CGFloat(0.0); y < rect.height; y=y+elementSize {
let saturation = y < rect.height/2.0 ? CGFloat(2 * y)/rect.height : CGFloat(1.0)
let brightness = y < rect.height/2.0 ? CGFloat(1.0) : 2.0 * CGFloat(rect.height - y)/rect.height
for var x = CGFloat(0.0); x < rect.width; x=x+elementSize {
let hue = x/rect.width
let color = UIColor(hue: hue, saturation: saturation, brightness: brightness, alpha: 1.0)
CGContextSetFillColorWithColor(context, color.CGColor)
CGContextFillRect(context, CGRect(x:x, y:y, width:elementSize,height:elementSize))
print("HSCColorPicker loaded - drawRect stop")
}
}
}
func getColorAtPoint(point:CGPoint) -> UIColor {
print("HSCColorPicker loaded - getColorAtPoint start")
let roundedPoint = CGPoint(x:elementSize * CGFloat(Int(point.x/elementSize)),
y:elementSize * CGFloat(Int(point.y/elementSize)))
let saturation = roundedPoint.y < self.bounds.height/2.0 ? CGFloat(2 * roundedPoint.y)/self.bounds.height : CGFloat(1.0)
let brightness = roundedPoint.y < self.bounds.height/2.0 ? CGFloat(1.0): 2.0 * CGFloat(self.bounds.height - roundedPoint.y)/self.bounds.height
let hue = roundedPoint.x/self.bounds.width
print("HSCColorPicker loaded - getColorAtPoint stop")
return UIColor(hue: hue, saturation: saturation, brightness: brightness, alpha: 1.0)
}
func touchedColor(gestureRecognizer: UILongPressGestureRecognizer){
let vPoint = gestureRecognizer.locationInView(self)
vColor = getColorAtPoint(vPoint)
VCColorPicker.LabelColor.backgroundcolor = vColor
}
}
我會很感激，如果有人能告訴我我需要如何改變這是實際工作的代碼。先謝謝你。也許你也可以告訴我是否有更好的方法來做到這一點。如果你回答，請給我如何改變代碼的確切信息。我試圖用一些不同的書來理解它，但我無法弄清楚我做錯了什麼。
René