apple.uikit.protocol

Interface UIPickerViewDelegate

All Known Subinterfaces:

UIPickerViewAccessibilityDelegate

public interface UIPickerViewDelegate

Method Summary

Modifier and Type	Method and Description
default NSAttributedString	pickerViewAttributedTitleForRowForComponent(UIPickerView pickerView, long row, long component) attributed title is favored if both methods are implemented
default void	pickerViewDidSelectRowInComponent(UIPickerView pickerView, long row, long component)
default double	pickerViewRowHeightForComponent(UIPickerView pickerView, long component)
default java.lang.String	pickerViewTitleForRowForComponent(UIPickerView pickerView, long row, long component) these methods return either a plain NSString, a NSAttributedString, or a view (e.g UILabel) to display the row for the component.
default UIView	pickerViewViewForRowForComponentReusingView(UIPickerView pickerView, long row, long component, UIView view)
default double	pickerViewWidthForComponent(UIPickerView pickerView, long component) returns width of column and height of row for each component.

Method Detail

pickerViewAttributedTitleForRowForComponent

default NSAttributedString pickerViewAttributedTitleForRowForComponent(UIPickerView pickerView,
                                                                       long row,
                                                                       long component)

attributed title is favored if both methods are implemented

pickerViewDidSelectRowInComponent

default void pickerViewDidSelectRowInComponent(UIPickerView pickerView,
                                               long row,
                                               long component)

pickerViewRowHeightForComponent

default double pickerViewRowHeightForComponent(UIPickerView pickerView,
                                               long component)

pickerViewTitleForRowForComponent

default java.lang.String pickerViewTitleForRowForComponent(UIPickerView pickerView,
                                                           long row,
                                                           long component)

these methods return either a plain NSString, a NSAttributedString, or a view (e.g UILabel) to display the row for the component. for the view versions, we cache any hidden and thus unused views and pass them back for reuse. If you return back a different object, the old one will be released. the view will be centered in the row rect

pickerViewViewForRowForComponentReusingView

default UIView pickerViewViewForRowForComponentReusingView(UIPickerView pickerView,
                                                           long row,
                                                           long component,
                                                           UIView view)

pickerViewWidthForComponent

default double pickerViewWidthForComponent(UIPickerView pickerView,
                                           long component)

returns width of column and height of row for each component.