[英]handle events in corona lua
Iam new to corona, so I dont know how to organize my code to best. 我是电晕的新手,所以我不知道如何最好地组织代码。 I am trying to regiser click when user click on leftHam image, but I dont how to do it most efficently.
当用户单击leftHam图像时,我尝试重新注册单击器,但是我没有最有效的方法。 Right now I am getting leftHam is nil although on creation it should be assinged a value.
现在我要离开了汉姆虽然在创建时应该被赋值一个零。
local composer = require( "composer" )
local widget = require( "widget" )
local scene = composer.newScene()
local _H = display.contentHeight
local _W = display.contentWidth
leftNavBtn = nil
local navbarGroup
function scene:create( event )
local sceneGroup = self.view
local background = display.newImage("res/bg.png" )
background:scale( _W, _H )
background.x = _W
background.y = _H
local navbarGroup = display.newContainer(_W, _H/4)
navbarGroup.x = _W /2
--navbarGroup.y = 0
local top_bar = display.newImage("res/home/top_bar.png")
top_bar.y = top_bar.height/2
navbarGroup:insert(top_bar)
--local leftNavBtn = display.newImageRect("res/home/hamburger.png", 100, 100)
leftNavBtn.y = leftNavBtn.height/1.5
leftNavBtn.x = - navbarGroup.width/2 + leftNavBtn.width
leftNavBtn = display.newImageRect("res/home/hamburger.png", 100, 100)
leftNavBtn.y = leftNavBtn.height/1.5
leftNavBtn.x = - navbarGroup.width/2 + leftNavBtn.width
navbarGroup:insert(leftNavBtn)
local rightNavBtn = display.newImageRect("res/home/hamburger.png", 100, 100)
rightNavBtn.y = leftNavBtn.height/1.5
rightNavBtn.x = navbarGroup.width/2 - leftNavBtn.width
navbarGroup:insert(rightNavBtn)
end
function test()
print("clickedddddddddddd")
end
function leftNavBtn:touch(event)
if event.phase == "began" then
display.getCurrentStage( ):setFocus(self)
self.isFocus = true
elseif self.isFocus then
if event.phase == "moved" then
print("moved")
elseif event.phase == "ended" or event.phase == "cancelled" then
display.getCurrentStage( ):setFocus(nil)
self.isFocus = false
end
end
return true
end
leftNavBtn:addEventListener( "touch", test )
scene:addEventListener( "create", scene )
return scene
Do you mean leftNavBtn
because leftHam
doesn't exist anywhere. 您是说
leftNavBtn
是因为leftHam
在任何地方都不存在。
You are creating leftNavBtn
in scene:create
but are attempting to use it before calling that function anywhere (the leftNavBtn:addEventListener( "touch", test )
) line. 您正在
scene:create
中创建leftNavBtn
,但是在任何地方( leftNavBtn:addEventListener( "touch", test )
)行调用该函数之前尝试使用它。
Within scene:create
you also use leftNavBtn
before creating it because you commented out this line local leftNavBtn = display.newImageRect("res/home/hamburger.png", 100, 100)
without commenting out the two lines after it (which set of three lines you then duplicate immediately after that). 在
scene:create
您还leftNavBtn
在创建它之前使用leftNavBtn
,因为您已注释掉了这一行, local leftNavBtn = display.newImageRect("res/home/hamburger.png", 100, 100)
而没有注释掉其后的两行(哪一组三行,然后您立即复制)。
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