如何在Lua中为随机生成的数字分配功能 [英] How to assign a function in Lua for a randomly generated numbers

问题描述

首先，我将1-10个数组中的10张图像作为键值存储在数组(即表格)中，然后使用0-9之间的math.random函数创建一个随机数. 并且我需要通过random函数创建的值访问存储在数组中的图像，并为特定的图像文件单独分配触摸功能.

First I stored 10 images in array(i.e., table) from 1-10 as key values and I create a random number using math.random function between 0-9.,
and I need to access the image that is stored in array by the value created by random function, and assign the touch function for the particular image file alone.,

例如:

如果随机函数将数字创建为"5"，则需要将存储在数组索引中的图像5.png移为5.除5.png以外的其他图像均不应使用触摸功能.(即，它们是不允许在屏幕上移动，但需要在屏幕上显示)

If the random function creates number as "5" I need to move the image 5.png that is stored in array index as 5 .,other images except 5.png should not use touch function., (i.e., they are not allowed to move in screen but need to display in screen)

这是我的代码:

local myText1 = display.newText(tostring(no1),130, 100, "Jokerman", 36); 
myText1:setTextColor(238,18,137)
print("text value1 :",no1)

local myText2 = display.newText(tostring(ran),130, 140, "Jokerman", 36); 
myText2:setTextColor(238,18,137)
print("text value2 :",ran)

result = no1 + ran;
print("Result is:" ,result)

local myres = result
print("myresultant string is -->" ,myres)

myres1 = myres % 10;
myres2 = math.floor(myres / 10);
print(myres1)
print(myres2)
--assigning values
    dig1 = myres1
    dig2 = myres2

 function dig1:touch(event)
    local t = event.target
    -- printTouch(event)
    local phase = event.phase
        if phase == "began" then
            -- Make target the top-most object
                local parent = t.parent
                parent:insert(t)
                display.getCurrentStage():setFocus(t)
    -- This flag is to prevent spurious events being sent to the target
                t.isFocus = true
    -- Store initial position
                t.x0 = event.x - t.x
                t.y0 = event.y - t.y
    -- Make myObject temporarily kinematic
                event.target.bodyType = "kinematic"
    -- Stop current motion, if any
                event.target:setLinearVelocity(0,0)
                event.target.angularVelocity = 0
        elseif t.isFocus then
                if phase == "moved" then
                    t.x = event.x - t.x0
                    t.y  = event.y - t.y0

        elseif phase == "ended" or phase == "cancelled" then
                if currentTarget ~= nil and isHighlighted then
                -- Move piece to target
                    transition.to(t,{
                        time = 150,
                        x = currentTarget.x,
                        y = currentTarget.y
                    })
                    currentTarget = nil
                    isHighlighted = false
                end
            display.getCurrentStage():setFocus(nil)
            t.isFocus = false
            -- Switch body type back to "static"
            event.target.bodyType = "static"
        end
    end

    return true
end

dig1:addEventListener("touch",dig1)

推荐答案

对不起，我仍然不清楚这个问题.但是注释中不清楚，因此请尝试此答案.

Sorry I am still not clear about the problem. But can't be clear in comments, so trying this answer.

这是我想您要尝试使用的伪代码:

Here is what I think you are trying to do, in pseudocode:

-- init (startup)
function touch(image) 
    ... do something to image ...
end

function noTouch(image) 
    end -- nothing to touch

imageArray = table of 10 images
each image in imageArray is of "class" Image
for each image in imageArray do
    image.touch = noTouch -- a "do nothing" function
end
-- init completed

-- later, this gets called:
function touchRandomImage()
    index = random number between 1 and 10 (incl)
    moveImage = imageArray[index]
    moveImage.touch = yourTouchFunction
end

稍后，当其他一些代码调用image:touch()(或image.touch(image)，相同的东西)时，只有上面随机选择的图像会使用特殊的触摸功能，而其他所有代码都会具有以下功能:没有noTouch.

Later when some other code calls image:touch() (or image.touch(image), same thing), only the randomly selected image as per above will use the special touch function, all the others will have the do-nothing noTouch.

如果可以多次调用touchRandomImage()，则必须跟踪随机选择的上一个"图像，以便将其触摸字段重置为noTouch函数:

If touchRandomImage() can be called multiple times, you have to keep track of the "previous" randomly selected image so that you can reset its touch field to be the noTouch function:

function touchRandomImage()
    -- prevIndex is a global, or a field etc
    if prevIndex ~= nil then
        imageArray[prevIndex].touch = noTouch
        prevIndex = nil -- in case exception etc
    newIndex = random number between 1 and 10 (incl)
    moveImage = imageArray[newIndex]
    moveImage.touch = yourTouchFunction
    prevIndex = newIndex
end

这篇关于如何在Lua中为随机生成的数字分配功能的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！