ios - Swift 3.0 字符串问题

Question

我有一个自定义选择器 View ，它工作得很好，但有一个问题。您可以再次单击该按钮，然后选择器 View 将被关闭。但是，当它关闭时，取消按钮中的文本将变为空白并且不会保持不变(“选择”是一个打开选择器 View 的按钮，当您从选择器 View 中选择某些内容以反射(reflect)您选择的内容时，其文本会发生变化。我什么想要发生的情况是，如果您再次单击选择按钮(而不是选择器 View )，那么取消按钮中的文本将不会更改并变为空白。

var pickValue:AnyObject? {
        didSet{
            if let pickValue = pickValue{
                Select.setTitle("\(pickValue)", for: UIControlState())
            }else{
                Select.setTitle("Select", for: UIControlState())
            }
        }
    }

@IBAction func Show(_ sender: AnyObject) {
        let pickercontrol  = LCTableViewPickerControl(
            frame: CGRect(x: 0, y: self.view!.frame.size.height + 150, width: view.bounds.size.width - 50, height: 150),
            title: "Please pick an item",
            value: pickValue,
            items: ["minute", "hour", "day", "month", "year"],
            offset: CGPoint(x: 0, y: 0))
        pickercontrol?.tag = 1
        view.addSubview(pickercontrol!)
        pickercontrol?.show(in: view) { [weak self](sender, item) in
            guard let view = sender as? LCTableViewPickerControl else{
                return
            }
            view.dismiss()
            self?.pickValue = item as AnyObject?
        }


    }

The image when the picker view is initialized and your able to pick a value

Here is a picture of the problem. After you click the button again. The picker view dismisses and the text inside the button becomes blank. I want to change it so that if the view is dismissed and no value is chosen from the picker view then the text inside the button stays the same

Answer 1

您需要设置您想要的 controlState。 对于 UIControlState.normal