cocoa - UIPickerView 不允许通过委托(delegate)的 `attributedTitleForRow...` 更改字体名称和大小

Question

我使用以下函数来更改字体颜色和字体大小，颜色有效，但字体名称和字体大小不起作用。

func pickerView(pickerView: UIPickerView, attributedTitleForRow row: Int, forComponent component: Int) -> NSAttributedString? 

var myTitle = NSAttributedString(string: titleData, attributes: [NSFontAttributeName:UIFont(name: "Arial-BoldMT", size: 45)!, NSForegroundColorAttributeName:UIColor.whiteColor()])

有什么帮助吗？

谢谢。

Answer 1

我有另一个选择可能对你有帮助..

完成正常选择器 View 所需的所有工作:获取更多帮助 UIPickerView make in Swift iOS

现在按照此步骤操作: - 您可以使用 viewForRow 方法，如下所示

func pickerView(pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusingView view: UIView!) -> UIView
{
    var pickerLabel = UILabel()
    pickerLabel.textColor = UIColor.blackColor()
    pickerLabel.text = "PickerView Cell Title"
   // pickerLabel.font = UIFont(name: pickerLabel.font.fontName, size: 15)
    pickerLabel.font = UIFont(name: "Arial-BoldMT", size: 15) // In this use your custom font
    pickerLabel.textAlignment = NSTextAlignment.Center
    return pickerLabel
}

更新了 Swift 3

func pickerView(pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusingView view: UIView!) -> UIView
{
    let pickerLabel = UILabel()
    pickerLabel.textColor = UIColor.black
    pickerLabel.text = "PickerView Cell Title"
    // pickerLabel.font = UIFont(name: pickerLabel.font.fontName, size: 15)
    pickerLabel.font = UIFont(name: "Arial-BoldMT", size: 15) // In this use your custom font
    pickerLabel.textAlignment = NSTextAlignment.center
    return pickerLabel
}

更新了 Swift 5

func pickerView(_ pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusing view: UIView?) -> UIView
    {
        let pickerLabel = UILabel()
        pickerLabel.textColor = UIColor.white
        pickerLabel.text = "PickerView Cell Title"
        // pickerLabel.font = UIFont(name: pickerLabel.font.fontName, size: 15)
        pickerLabel.font = UIFont.boldSystemFont(ofSize: 20) // In this use your custom font
        pickerLabel.textAlignment = NSTextAlignment.center
        return pickerLabel
    }

也许它对你有帮助，我也在我的项目中使用了这个。