ios - 如何在 Swift 中更改 UIPickerView 组件的字体大小？

Question

当我在 attributedTitleForRow 中更改字体颜色和大小时，字体大小没有改变，但所选行的颜色发生了变化:

func pickerView(_ pickerView: UIPickerView, attributedTitleForRow row: Int, forComponent component: Int) -> NSAttributedString? {
        var color: UIColor!
        var size: UIFont!
                switch component {
        case 0:
            if pickerView.selectedRow(inComponent: 0) == row {
                color = UIColor.init(red: 186/255, green: 61/255, blue: 62/255, alpha: 1.0)
                size = UIFont(name:"Raleway", size:14)

            } else {
                color = UIColor.black
            }

            let attributes: [String: AnyObject] = [
                NSForegroundColorAttributeName: color, NSFontAttributeName: size]
            return NSAttributedString(string: peopleCount[row], attributes: attributes)
        default:
            return NSAttributedString()
        }
    }

当我在 viewForRow 方法中更改字体颜色和大小时，所有行的颜色和字体大小都会更改:

func pickerView(_ pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusing view: UIView?) -> UIView {

        var label = view as! UILabel!
        if label == nil {
            label = UILabel()
            label?.textColor = UIColor.red
        }
        switch component {
        case 0:

            label?.text = peopleCount[row]
            label?.font = UIFont(name:"Raleway", size:14)
            return label!
        default:
            return label!
        }

    }

所以，我的问题是如何更改所有行的字体大小，但只更改选定行的颜色？作为:

Answer 1

    func pickerView(_ pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusing view: UIView?) -> UIView {

    var label = view as! UILabel!
    if label == nil {
        label = UILabel()
        label?.textAlignment = .center
        //label?.textColor = UIColor.red
    }
    switch component {
    case 0:

            label?.text = peopleCount[row]
            if(pickerView.selectedRow(inComponent: 0)==row){
            label?.textColor = UIColor.red
            }
            return label!

    default:
        return label!
    }

}

您可以像这样编辑您的代码，要看到标签颜色发生变化，您必须在下面添加这段代码。这个跟点击事件有关

    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
    pickerView.reloadAllComponents()

       }