Lua for循环不能正确迭代 [英] Lua for loop does not iterate properly

问题描述

我非常需要for循环的帮助。我试图在Corona SDK中通过Lua for循环，但是我做错了什么，但是我不知道是什么。请参阅下面的代码：

pre code $ function $ move $ $ b $ j $ 1,4 $ do
if event.phase ==startedthen
markY = event.target.y

elseif event.phase ==movedthen
local y =（event .y - event.yStart）+ markY
event.target.y = y

elseif event.phase ==endedthen

if（hasCollided（ event.target，hotSpots [j]））然后

print（hasCollided with floor：，hotSpots [j] .floor）

if（event.target.destination == hotSpots [j] .floor）then
print（correct floor）
succesfullPassengers = succesfullPassengers + 1
$ b如果succesfullPassengers == PASSENGER_AMOUNT then
print 游戏结束）
结束
其他
print（Wrong！电梯与地面相撞： ，hotSpots [j] .floor）
end
end
end
return true
end
end

我在这里要做的是检查何时在屏幕上拖放电梯，我已经创建了热点（基本上是hitbox，现在用作艺术占位符），并将它们放置在hotSpot表中，如下所示：

   -  - 创建电梯热点
为k = 1,4,1做
 hotSpots [k] = display.newRect（gameAreaGroup，0，0，50，75）
 hotSpots [k] .alpha = 0.25  - 使用alpha 
显示热点hotpot [k] .floor = k  -  floor id 
 print（在地板上创建热点：，hotSpots [k] .floor）
 hotSpots [k] .x = display.contentWidth * 0.5 
 hotSpots [k] .y = firstFloor  - （FLOOR_HEIGHT * k）
 hotSpots [k]：setFillColor（255,0,0）
热点[k]：addEventListener（tap，returnFloor） - 检查楼层值
 gameAreaGroup：insert（hotSpots [k]）
 end 
  pre> 
 
 
我用一个名为returnFloor的测试函数（1,2,3,4）检查每个热点是否有唯一的楼层值。当我把电梯拖到一楼时，我收到电梯与地板碰撞1：错误的信息，但在其他楼层，我收到有地板：1的信息。因此，我的moveLift函数中的for循环必须有错误，因为它只返回第一层而不是其他楼层。
 
 
 
 PS：正确的楼层是4， 
解决方案
在for循环中有return true，所以它永远不会超过j = 1。我认为你可能需要在最后的if语句中或者在其后面的结尾之下移动这个语句（不知道完整的逻辑，我不确定返回的值用于什么）。
 
I am in dire need of help with a for loop. I'm trying to go through a for loop in Lua with the Corona SDK, but I am doing something wrong but I don't know what. See below for my code:
function moveLift(event)
    for j=1,4,1 do
        if event.phase == "began" then
            markY = event.target.y

        elseif event.phase == "moved" then
            local y = (event.y - event.yStart) + markY
            event.target.y = y

        elseif event.phase == "ended" then

            if (hasCollided( event.target, hotSpots[j] )) then

                print("hasCollided with floor: ", hotSpots[j].floor)

                if (event.target.destination == hotSpots[j].floor) then
                    print("correct floor")
                    succesfullPassengers = succesfullPassengers + 1

                    if succesfullPassengers == PASSENGER_AMOUNT then
                        print("game over")
                    end
                else
                    print("Wrong! elevator has collided with floor: ", hotSpots[j].floor)
                end
            end
        end
        return true
    end
end
What I'm trying to do here is checking when I drag and drop an elevator on screen on what floor it has landed. I've created hotspots (basically hitboxes and currently serving as art placeholder) and placed them in the hotSpot table like this:
-- Create elevator hotspots
for k=1,4,1 do
    hotSpots[k] = display.newRect( gameAreaGroup, 0, 0, 50, 75 )
    hotSpots[k].alpha = 0.25  --Show hotspots with alpha
    hotSpots[k].floor = k -- The floor id
    print("Created hotspot on floor: ",hotSpots[k].floor)
    hotSpots[k].x = display.contentWidth *0.5
    hotSpots[k].y = firstFloor - (FLOOR_HEIGHT * k)
    hotSpots[k]:setFillColor( 255,0,0 )
    hotSpots[k]:addEventListener( "tap", returnFloor ) -- Check floor value
    gameAreaGroup:insert(hotSpots[k])
end
I check if every hotspot has a unique floor value with a test function called returnFloor, which they have (1,2,3,4). When I drag and drop my elevator on the first floor, I receive the message "Wrong! elevator has collided with floor: 1", but on any other floor I receive the message: "hasCollided with floor: 1". So there must be something wrong with the for loop in my moveLift function because it only returns floor 1 and not any other floor.

PS: the correct floor is 4, the top floor.
解决方案
You have "return true" inside your for loop, so it will never get past j=1. I think you may need to move that statement up inside the last if statement, or below the "end" that follows it (without knowing the full logic, I'm not sure what the returned value is used for).

                        
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