UIPickerViewDelegate bug

Question

Created Mar ’22

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Hi, I'm writing a code with a UIPickerView that has 3 components. I want each component to have a different row height. Obviously I tried to use pickerView(_:rowHeightForComponent:), but it turns out that rowHeightForComponent 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 not valid. Did anyone have the same problem? Is it a known bug?

This is the code of the method:

    func pickerView(_ pickerView: UIPickerView, rowHeightForComponent component: Int) -> CGFloat {
        componentsRowHeight[component]
    }

Because I have 3 components, which are held in an array, the valid indices are 0, 1, 2. But the delegate function is sometimes called with 3.

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Answer 1

Claude31 OP

Mar ’22

Could you show the code ?

0

Answer 2

Claude31 OP

Mar ’22

rowHeightForComponent sometimes equals to the number of components, i.e. in my case is sometimes equals 3

Those two items (row height and number of components) are completely different in nature (and one is CGFloat, other Int). What do you mean precisely ?

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Answer 3

noamohana OP

Mar ’22

I mean that the method is called with the parameter component which is out of bounds. In the docs for this method apple states in regards to component:

A zero-indexed number identifying a component of pickerView. Components are numbered left-to-right.

So the actual number, in my case which I have 3 components. The number of components is returned from

func numberOfComponents(in pickerView: UIPickerView) -> Int {
  3
}

that I implement as part of the data source.

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Answer 4

noamohana OP

Mar ’22

Added.

0