UIPickerViewDelegate rowHeightForComponent 返回越界索引
我正在编写带有 3 个组件的 UIPickerView 的代码。我希望每个组件都有不同的行高。我有一个模型组件数组，每个组件都有属性 rowHeight 并且我实现了 pickerView(_:rowHeightForComponent:) 如下：
func pickerView(_ pickerView: UIPickerView, rowHeightForComponent component: Int) -> CGFloat {
components[component].rowHeight
}
但事实证明参数 component 有时等于组件的数量，即在我的例子中有时等于 3。所以我实际上得到了一个超出范围的组件索引。有人遇到同样的问题吗？这是一个已知的错误吗？
I'm writing a code with a UIPickerView that has 3 components. I want each component to have a different row height. I have an array of model components, each has the property rowHeight and I implemented pickerView(_:rowHeightForComponent:) as the following:
func pickerView(_ pickerView: UIPickerView, rowHeightForComponent component: Int) -> CGFloat {
components[component].rowHeight
}
but it turns out that the parameter component sometimes equals to the number of components, i.e. in my case is sometimes equals 3. So I actually get a component index that is out of bounds. Did anyone have the same problem? Is it a known bug?
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