iOS8 Swift中的UIPickerView宽度 [英] UIPickerView Width in iOS8 Swift

问题描述

我根本无法找到如何在UIPickerView上获取组件的宽度。它不允许简单的（Int），因为它需要是CGFloat。我在< #code＃>部分放置了什么？

I simply can not find out how to get a width of a component on my UIPickerView. It's not allowing something simple (Int) as it needs to be CGFloat. What exactly do I put in the <#code#> section?

func pickerView(pickerView: UIPickerView, widthForComponent component: Int) -> CGFloat {
    <#code#>
}

谢谢！

推荐答案

该方法不获取组件的宽度......选择器视图调用该方法来询问组件应该有多宽。

That method doesn't "get a width of a component..." The picker view calls that method to ask you how wide a component should be.

你的方法可以很简单：

func pickerView(pickerView: UIPickerView, widthForComponent component: Int) -> CGFloat 
{
  return CGFloat(25.0)
}

（或者适合您的选择器视图的任何宽度...）

(or whatever width is appropriate for your picker view...)

您只需要将结果转换为已检测的类型。

You just need to cast the result to the exptected type.

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