科罗纳-向表/数组或表中的项目添加侦听器

2013-7-4 5:7:33
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我正在尝试为从表格中随机选择的图像添加一个触摸事件，使用以下代码：

easyGame2 = function()
catTable = { 'catwhite', 'catblue', 'catred', 'catyellow', 'catgreen', 'catorange', 'catpink', 'catpurple'}
randomCat = catTable[math.random(#catTable)]

cat = display.newImageRect(randomCat..'.png', 50, 50)

cat.x = math.random(20, display.contentWidth-20)
cat.y = 0

cat.myName = randomCat
transition.to( cat, { rotation = cat.rotation-360, time=2000, y=500,

onComplete=easyGame2})
end

easyGame2()

cat:addEventListener('touch', tapCat )

tapCat = function(event)
if event.phase == 'began' then
    score = score + 2
    display.remove(cat)
    cat = nil
   end
end

第一次触摸它有效，然后就好像不再有监听器一样。我如何使它适用于[math.random(#catTable)]中选择的每个图像

我也尝试了这段代码：

local catTable = {}
cat1 = {}
cat1.imgpath = 'images/catwhite.png'
table.insert(catTable, cat1)
--cat1:addEventListener('touch', tapCat ) --causes errors

cat2 = {}
cat2.imgpath = 'images/catblue.png'
table.insert(catTable, cat2)

cat3 = {}
cat3.imgpath = 'images/catred.png'
table.insert(catTable, cat3)

cat4 = {}
cat4.imgpath = 'images/catyellow.png'
table.insert(catTable, cat4)

cat5 = {}
cat5.imgpath = 'images/catgreen.png'
table.insert(catTable, cat5)

cat6 = {}
cat6.imgpath = 'images/catorange.png'
table.insert(catTable, cat6)

cat7 = {}
cat7.imgpath = 'images/catpink.png'
table.insert(catTable, cat7)

cat8 = {}
cat8.imgpath = 'images/catpurple.png'
table.insert(catTable, cat8)

easyGame2 = function()
randomCat = catTable[math.random(#catTable)]

cat = display.newImageRect(randomCat.imgpath, 50, 50)

cat.x = math.random(20, display.contentWidth-20)
cat.y = 0

cat.myName = randomCat
transition.to( cat, { rotation = cat.rotation-360, time=2000, y=450,    onComplete=function(self)self.parent:remove(self);self=nil;end})

for i = 1, #catTable do
        catTable[i]:addEventListener('touch', tapCat)--causes error
    end

end

它会给出错误“181:尝试调用方法'addEventListener'（空值）”

点赞
用户1682268
用户1682268

在监听器上方放置 tapcat 函数，像这样：

tapCat = function(event)
if event.phase == 'began' then
    score = score + 2
    display.remove(cat)
    cat = nil
   end
end

cat:addEventListener('touch', tapCat )
2013-06-21 23:11:31
用户2509364
用户2509364

没关系，我成功解决了，只需进行以下编辑：

randomCat = catTable[math.random(#catTable)]
cat = display.newImageRect(randomCat..'.png', 50, 50)
transition.to( cat, { rotation = cat.rotation-360, time=2000, y=500,onComplete=easyGame2})

变成

randomCat = math.random(#catTable)
cat = display.newImageRect(catTable[randomCat], 50, 50)
cat.type = randomCat
cat.trans = transition.to( cat, { rotation = cat.rotation-360, time=2000, y=550, onComplete=function(self)self.parent:remove(self);self=nil;end})
cat:addEventListener('touch', tapCat )
return cat
end

tapCat = function(event)
    catTouch = event.target
    transition.cancel (event.target.trans)

    if catTouch.type == catnormal then
        score = score + 5
    else
        score = score + 10
    end
        display.remove(catTouch)
        cat = nil
    return true
end

感谢Vovahost提供的答案。

2013-06-22 16:48:19

作者:

用户2509364

用户2509364
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