我正在尝试使用可可触摸类创建一个自定义滑块,其最大值由 UIStepper 确定。我将 UIStepper 连接到我的视图控制器,我想在可可触摸类中引用它的值作为滑块的最大值。在类中引用步进器值的语法是什么?
我不断收到错误use of unresolved identifier
。
这是我的视图控制器:
import UIKit
class ViewController: UIViewController {
@IBOutlet weak var stepperValue: UIStepper!
@IBOutlet weak var label: UILabel!
let slider1 = Slider1(frame: CGRectZero)
override func viewDidLoad() {
super.viewDidLoad()
label.textColor = UIColor.darkTextColor()
slider1.backgroundColor = UIColor.lightGrayColor()
view.addSubview(slider1)
}
override func viewDidLayoutSubviews() {
let margin: CGFloat = 20.0
let width = view.bounds.width - 2 * margin
slider1.frame = CGRect(x: margin, y: 3 * margin, width: width, height: 1.5 * margin)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
}
这是我的UIControl
子类:
class Slider1: UIControl {
var minimumValue = 0.0
var maximumValue = stepperValue.value
var value = 0
let trackLayer = CALayer()
var trackHeight:CGFloat = 2.0
var trackColor = UIColor.blackColor().CGColor
var tickHeight:CGFloat = 8.0
var tickWidth: CGFloat = 2.0
var tickColor = UIColor.blackColor().CGColor
let thumbLayer = CALayer()
var thumbColor = UIColor.blackColor().CGColor
var thumbMargin:CGFloat = 2.0
var thumbWidth: CGFloat {
return CGFloat(bounds.height)
}
}