Notes WWDC 2020 : iOS pickers, menus and actions

Mes notes pour les sessions dédiées aux « iOS pickers, menus and actions » de la WWDC 2020.

• Design with iOS pickers, menus and actions
• Build with iOS pickers, menus and actions

Menu

• Can now show menu from any button
• Unify iOS 13 action sheet on iPhone, popover on iPad
• Menu appear next to the button itself
• No need to add Cancel button

Menus can be used for:

• Disambiguation
• Navigation
• Selection
• Collect secondary actions

// UIButton, UIBarButtonItem
button.menu = UIMenu(…) // displayed on long press

// UIButton
button.showsMenuAsPrimaryAction = true
// UIBarButtonItem
// Don’t provide a primary action.

• UIDeferredMenuElement to load menu items asynchronously, with standard loading UI
• updateVisibleMenu() to update a presented menu

Date and time picker

UIDatePicker: not new, but significantly improved, new “Compact” mode

• Date
• Time
• Date and time

Color picker

UIColorPickerViewController

• Eyedropper
• Saved colors

Updated controls

Other existing controls have received minor updates:

• Tweaked appearance
• Closer to Mac versions
• More customization