1

我创建了一个显示组并将一些项目放入其中,并添加了一个用于滑动功能的侦听器,该功能可以滑动显示组以到达屏幕外的项目并返回。我还想为那些调用拖动项目的函数的项目添加一个触摸监听器。那么如何在不干扰这些听众的情况下实现这一目标呢?

这是图片:

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我将所有这些圆圈和数字放在蓝色矩形上的显示组中,并为该组添加了一个触摸事件侦听器:

ballGroup.touch=slide
ballGroup:addEventListener("touch", ballGroup) 

我还希望能够为球添加另一个触摸事件侦听器:

function createBall()

        local ball = display.newCircle(x, H/2-25, 50)
        local label = display.newText(""..count, ball.x, ball.y, nil , 35)
        label:setTextColor ( 255, 0, 0 )
        ball.no = count
        ball.touch=chooseBall
        ball:addEventListener("touch", ball)
        ballGroup:insert(ball)
        ballGroup:insert(label)
        count=count+1
        x=x+120
end

但是,它只是在监听我首先编写的函数的事件。你建议我做什么来实现我想要的?当我尝试滑动球时,我只想让它监听滑动事件,当我尝试拖动球时,我希望它监听拖动事件。我怎样才能做到这一点?

好的,我正在分享我在 Rob 的建议之后提出的整个代码,但它仍然无法正常工作,并且 Outlaw IDE 给出了该错误:

尝试对 x0(nil value) 执行算术运算,该行是移动相位在滑动函数中的位置。

这是整个代码:

W=display.contentWidth
H=display.contentHeight
local ballGroup = display.newGroup()--balls and numbers will be added
local x=50 --for ball's locating
local count=1 -- little ball's number starting from 1


local rect --background rect for balls
--big circle at the bottom
local circle = display.newCircle(W/2, H-90, 70) 
local circleTxt = display.newText("", 0, 0, nil, 50 )
circleTxt:setTextColor ( 255, 0, 0 )
circleTxt.x=circle.x; circleTxt.y = circle.y


--Dragging ball and checking if  it is inside big circle if it is so, remove ball and   show the number of ball on big circle
function dragBall(self, event)
if event.phase=="began" then
    display.getCurrentStage ( ):setFocus(self,  event.id)
    self.isFocus=true
    self.x0= self.x; self.y0=self.y
elseif event.phase=="moved" then
        local dx = math.abs( event.x - event.xStart ) -- Get the x-  transition of the touch-input
        local dy = math.abs( event.y - event.yStart ) -- Get the y-transition of the touch-input
        if dy < 5 then --I changed it to less than, because if  y is bigger,then focus should stay on the ball which will be dragged 
            display.getCurrentStage():setFocus( nil )
            event.target.isFocus = false
            return false
        end           
        self.x = self.x0+(event.x-event.xStart); self.y = self.y0+(event.y-event.yStart) --drag ball
elseif event.phase=="cancelled" or event.phase=="ended" then
        checkArea(self)
        display.getCurrentStage():setFocus(self,nil)

end             
return true
end


function createBall()
local ball = display.newCircle(x, H/2-25, 50)
local label = display.newText(""..count, ball.x, ball.y, nil , 35)
label:setTextColor ( 255, 0, 0 )
ball.no = count
ball.touch=dragBall
ball:addEventListener("touch", ball)
ballGroup:insert(ball)
ballGroup:insert(label)
count=count+1
x=x+120
end


for i=1,8 do
createBall()
end


rect = display.newRect(0,0, ballGroup.width, ballGroup.height); rect.y=H/2-25
rect:setFillColor(0,0,255)
rect:toBack()

function slide(self, event)

if event.phase=="began"  then
    self.x0=self.x 
    self.y0=self.y
    display.getCurrentStage():setFocus(self, event.id)
    self.isFocus=true
elseif event.phase=="moved" then
    local dif = event.x-event.xStart

    self.x = self.x0+dif
    if ballGroup.contentBounds.xMax < W then
        ballGroup.x = ballGroup.x+(W-ballGroup.contentBounds.xMax)
    elseif ballGroup.contentBounds.xMin > 0 then
        ballGroup.x = 0
    end
elseif event.phase=="cancelled" or event.phase=="ended" then
    display.getCurrentStage():setFocus(nil)
    self.isFocus=false 
end
return true 
end

ballGroup.touch=slide
ballGroup:addEventListener("touch", ballGroup)

local bounds = circle.contentBounds
local xMax = bounds.xMax
local xMin = bounds.xMin
local yMax = bounds.yMax
local yMin = bounds.yMin

function checkArea(self)    
    if self.x>xMin and self.x<xMax and self.y>yMin and self.y<yMax then
        circleTxt.text=""..self.no
        self:removeSelf()
        self=nil
    end 

end
4

2 回答 2

2

我的解决方案是 Runtime Touch Lister:

    if event.phase == "began" then
        startx = event.x

    elseif event.phase == "ended" then

        local endx = event.x
        result_postion = endx-startx
            if result_postion >50 then
                 print("right swipe")
            elseif result_postion <50 then
                  print("left swipe")
            end
     end

对象(球)后触摸功能

local function ball(event)
if event.phase == "began" then
startpos = event.x
display.getCurrentStage():setFocus(event.target)
elseif event.phase == "moved" then
endpos = event.x
result = endpos-startpos
if result<30 and result>=-30 then
print("correct")
    end
    end
end
于 2013-08-02T11:32:46.633 回答
0

您可以在滚动区域上有一个监听器,在圆圈上有一个监听器。圆圈的处理程序需要测试是否 event.phase 被“移动”,如果你移动了超过 5px,那么你想释放圆圈上的焦点并返回 false,让事件传播到底层对象。

        elseif event.phase == "moved" then -- Check if you moved your finger while touching
            local dx = math.abs( event.x - event.xStart ) -- Get the x-transition of the touch-input
            local dy = math.abs( event.y - event.yStart ) -- Get the y-transition of the touch-input
            if dx > 5 or dy > 5 then
                display.getCurrentStage():setFocus( nil )
                event.target.isFocus = false
                return false
            end
        end

或类似的东西。

于 2013-08-04T18:42:44.330 回答