composer.hideOverlay()

Type Function
Library composer.*
Return value none
Revision 2014.2269
Keywords composer, scene, overlay, hideOverlay
See also composer.showOverlay()

Overview

This function hides/removes the current overlay scene (see composer.showOverlay()), if one is being displayed.

When an overlay is hidden, an overlay-specific scene event parameter, event.parent, will be dispatched to the overlay scene. This parameter provides you with a reference to the parent scene object so that you may call functions/methods within it. See the Example section for a usage case.

Syntax

composer.hideOverlay( [recycleOnly] [, effect] [, time] )
recycleOnly (optional)

Boolean. If set to true, the scene will only be recycled (the self.view display group will be removed, but the scene object will remain in memory). Setting this to true is useful if you intend to show the overlay again in the near future. Default is false, meaning that the overlay scene will be completely removed, including its scene object.

effect (optional)

String. The visual transition effect applied to the overlay before it is hidden. A list of transition effects can be seen in the composer.gotoScene() documentation.

time (optional)

Number. The time duration for the effect, if a valid effect has been specified. Default is 500 milliseconds.

Example

------------------------------------------------------------------------------
-- In "scene1.lua" (parent scene)
------------------------------------------------------------------------------
local composer = require( "composer" )

local scene = composer.newScene()

-- Custom function for resuming the game (from pause state)
function scene:resumeGame()
    --code to resume game
end

-- Options table for the overlay scene "pause.lua"
local options = {
    isModal = true,
    effect = "fade",
    time = 400,
    params = {
        sampleVar = "my sample variable"
    }
}

-- By some method (a pause button, for example), show the overlay
composer.showOverlay( "pause", options )

return scene

------------------------------------------------------------------------------
-- In "pause.lua"
------------------------------------------------------------------------------
local composer = require( "composer" )

local scene = composer.newScene()

function scene:hide( event )
    local sceneGroup = self.view
    local phase = event.phase
    local parent = event.parent  --reference to the parent scene object

    if ( phase == "will" ) then
        -- Call the "resumeGame()" function in the parent scene
        parent:resumeGame()
    end
end

-- By some method (a "resume" button, for example), hide the overlay
composer.hideOverlay( "fade", 400 )

scene:addEventListener( "hide", scene )
return scene