我想要viewForRow pickerView UIPickerView个实例的不透明class ViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource {
weak var pickerView: UIPickerView! {
didSet {
pickerView.dataSource = self
pickerView.delegate = self
pickerView.backgroundColor = .clearColor()
pickerView.showsSelectionIndicator = true
pickerView.frame = CGRect(x: 50, y: 200, width: 100, height: 100)
view.addSubview(pickerView)
}
}
override func viewDidLoad() {
super.viewDidLoad()
pickerView = UIPickerView()
}
func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return 2
}
func pickerView(pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusingView view: UIView?) -> UIView {
let rowSize = pickerView.rowSizeForComponent(component)
let aView = UIView(frame: CGRect(x: 0, y: 0, width: rowSize.width, height: rowSize.height))
aView.opaque = true
aView.backgroundColor = .blackColor()
return aView
}
}
。我现在正在做的是一个半透明的视图！
这就是我所拥有的：
ViewController您可以在view后面看到aView的{{1}}背景。为什么？这可以解决吗？
非常感谢。