ios - UIPickerView 不能正确显示图像

Question

我正在实现一个仅包含图像的自定义选择器 View 。问题是，图像像这样相互叠加:

这是在选择器 View 中配置图像的代码:

func pickerView(pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusingView view: UIView!) -> UIView {
    let chosenImage: UIImageView = UIImageView(image: UIImage(named: iconArray[row]))
    NSLog("choosen image \(iconArray[row])")
    let workaroundImageView: UIImageView = UIImageView(frame: chosenImage.frame)
    workaroundImageView.backgroundColor = UIColor(patternImage: chosenImage.image!)
    return workaroundImageView
}

我错过了什么？有什么建议么？

Answer 1

在 UIPickerView 的委托(delegate)中利用 rowHeightForComponent。

pickerView:rowHeightForComponent:

给出组件所需的行高。

func pickerView(pickerView: UIPickerView!, rowHeightForComponent component: Int) -> CGFloat