Package apple.uikit.protocol

Interface UIPickerViewDelegate

All Known Subinterfaces:

UIPickerViewAccessibilityDelegate

public interface UIPickerViewDelegate

Method Summary

Modifier and Type	Method	Description
default @Nullable NSAttributedString	pickerViewAttributedTitleForRowForComponent(@NotNull UIPickerView pickerView, long row, long component)	attributed title is favored if both methods are implemented API-Since: 6.0
default void	pickerViewDidSelectRowInComponent(@NotNull UIPickerView pickerView, long row, long component)
default double	pickerViewRowHeightForComponent(@NotNull UIPickerView pickerView, long component)
default @Nullable java.lang.String	pickerViewTitleForRowForComponent(@NotNull 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 @NotNull UIView	pickerViewViewForRowForComponentReusingView(@NotNull UIPickerView pickerView, long row, long component, @Nullable UIView view)
default double	pickerViewWidthForComponent(@NotNull UIPickerView pickerView, long component)	returns width of column and height of row for each component.

Method Detail

pickerViewAttributedTitleForRowForComponent

@Nullable
default @Nullable NSAttributedString pickerViewAttributedTitleForRowForComponent(@NotNull
                                                                                 @NotNull UIPickerView pickerView,
                                                                                 long row,
                                                                                 long component)

attributed title is favored if both methods are implemented API-Since: 6.0

pickerViewDidSelectRowInComponent

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

pickerViewRowHeightForComponent

default double pickerViewRowHeightForComponent(@NotNull
                                               @NotNull UIPickerView pickerView,
                                               long component)

pickerViewTitleForRowForComponent

@Nullable
default @Nullable java.lang.String pickerViewTitleForRowForComponent(@NotNull
                                                                     @NotNull 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

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

pickerViewWidthForComponent

default double pickerViewWidthForComponent(@NotNull
                                           @NotNull UIPickerView pickerView,
                                           long component)

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