swift - 如何在 pickerview rowHeightForComponent 中获取行号？

Question

我有一个 pickerview，它可能有不同的行高，这取决于传递的数组中的文本:

func pickerView(_ pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusing view: UIView?) -> UIView {
    let label = UILabel(frame: CGRect(x: 0, y: 0, width: screenWidth, height: 44));
    label.lineBreakMode = .byWordWrapping;
    label.numberOfLines = 0;
    label.text = array[row]
    label.sizeToFit()

    return label;
}

func pickerView(_ pickerView: UIPickerView, rowHeightForComponent component: Int) -> CGFloat {
    // How to get the the row number of pickerview here?
    return 0
}

Answer 1

I have a pickerview that may have different height of the row depends on the text on passed array

不，您没有这样的选择器 View 。选择器 View 不能有可变的行高。你找不到方法的原因是没有这样的方法。