Question

我正在尝试将inputView背景颜色从默认的灰色更改为其他颜色但是我没有看到任何解决方案。

我有UIPickerView在用户触摸textField时打开，它像键盘一样在底部inputView。我是这样做的：myTextField.inputView = myPickerView。

由于我在inputView中使用它，我想我实际上必须更改它的背景颜色但不知道如何。

看起来像这样：

现在我想改变它的背景颜色。

我已经尝试过了：

myPickerView.setValue(0.8, forKey: "alpha")
myPckerView.backgroundColor = UIColor.blue
self.inputView.backgroundColor = UIColor.blue
几乎所有来自SO的解决方案

这是输出（在它上面有一些讨厌的模糊层）：

我是否必须为此创建某种自定义键盘，或者是否有解决方法或Apple再次告诉您可以做什么以及什么不喜欢机器人？

Answer 1

好的 - 因为你可以按照你想要的方式获得UIPickerView外观＆＃34;正常＆＃34;查看，你可以创建一个＆＃34; normal＆＃34;查看以用作.inputView，然后将您的选择器视图添加为子视图。

以下是一个简单示例 - 只需在IB中添加UITextField并将其连接到IBOutlet：

class MyViewController: UIViewController
{

    @IBOutlet weak var theTextField: UITextField!

    let cancelButton: UIButton = {
        let b = UIButton()
        b.setTitle("Cancel", for: .normal)
        b.translatesAutoresizingMaskIntoConstraints = false
        return b
    }()

    let doneButton: UIButton = {
        let b = UIButton()
        b.setTitle("Done", for: .normal)
        b.translatesAutoresizingMaskIntoConstraints = false
        return b
    }()

    let pvToolbar: UIView = {
        let v = UIView(frame: CGRect(x: 0, y: 0, width: 10, height: 40))
        v.translatesAutoresizingMaskIntoConstraints = false
        v.backgroundColor = .black
        return v
    }()

    let pvBackground: UIView = {
        let v = UIView(frame: CGRect(x: 0, y: 0, width: 10, height: 10))
        v.backgroundColor = .white
        v.translatesAutoresizingMaskIntoConstraints = false
        return v
    }()

    let pickerView: UIPickerView = {
        let p = UIPickerView(frame: CGRect(x: 0, y: 0, width: 10, height: 10))
        p.showsSelectionIndicator = true
        p.translatesAutoresizingMaskIntoConstraints = false
        return p
    }()

    override func viewDidLoad() {
        super.viewDidLoad()

        // add buttons to the inputAccessoryView "toolbar"
        pvToolbar.addSubview(cancelButton)
        pvToolbar.addSubview(doneButton)

        cancelButton.leftAnchor.constraint(equalTo: pvToolbar.leftAnchor, constant: 8.0).isActive = true
        cancelButton.topAnchor.constraint(equalTo: pvToolbar.topAnchor, constant: 6.0).isActive = true
        cancelButton.bottomAnchor.constraint(equalTo: pvToolbar.bottomAnchor, constant: -6.0).isActive = true

        doneButton.rightAnchor.constraint(equalTo: pvToolbar.rightAnchor, constant: -8.0).isActive = true
        doneButton.centerYAnchor.constraint(equalTo: cancelButton.centerYAnchor).isActive = true

        // add pickerView to our plain UIView that will become our inputView
        pvBackground.addSubview(pickerView)

        pickerView.topAnchor.constraint(equalTo: pvBackground.topAnchor).isActive = true
        pickerView.bottomAnchor.constraint(equalTo: pvBackground.bottomAnchor).isActive = true
        pickerView.centerXAnchor.constraint(equalTo: pvBackground.centerXAnchor).isActive = true
        pickerView.widthAnchor.constraint(equalTo: pvBackground.widthAnchor, multiplier: 1.0).isActive = true

        pickerView.delegate = self
        pickerView.dataSource = self

        // pvBackground "contains" the actual pickerView
        theTextField.inputView = pvBackground

        theTextField.inputAccessoryView = pvToolbar

    }

}

extension AnimConstraintsViewController:  UIPickerViewDelegate, UIPickerViewDataSource {

    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        return "Row: \(row)"
    }

    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        return 30
    }

    func numberOfComponents(in pickerView: UIPickerView) -> Int {
        return 1
    }

    func pickerView(_ pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusing view: UIView?) -> UIView {
        // simple label with centered text as our viewForRow
        let label = UILabel()
        label.backgroundColor = .white
        label.textColor = .black
        label.textAlignment = .center
        label.font = UIFont.systemFont(ofSize: 17.0, weight: UIFontWeightRegular)
        label.text = "Row: \(row)"
        return label
    }
}

结果：

Answer 2

使用此代码

mytextfield.inputView?.tintColor = UIColor.green

或尝试这个

mytextfield.inputView?.tintColor = UIColor.clear
mytextfield.inputView?.backgroundColor = UIColor.blue

将inputView背景颜色从模糊灰色更改为其他任何内容

2 个答案: