如果他面前的角色还在，如何阻止他

如何解决如果他面前的角色还在，如何阻止他

我不知道为什么我的代码不起作用。如果他前面的角色还在，我只想停止下一个角色。我的想法是在他们的线速度为 0 时设置LinearVeLocity(0,0) 以便下一个角色知道他必须在他面前角色的线速度为 0 时停止。

local function loopPg()

 local runningPG = display.newSprite(pg[math.random(5)],sequences_runningPG)
 runningPG.x = display.contentCenterX
 runningPG.y = display.contentCenterY-730
 runningPG:scale(0.75,0.75)
 runningPG:play()
 physics.addBody(runningPG,"dynamic",{radius = 55})


 local function pathPg()
    if(runningPG.y >= -190 and runningPG.y < 160) then
        runningPG:setLinearVeLocity(0,250)
    elseif (runningPG.y >= 160 and runningPG.x >= 220) then
        runningPG:setLinearVeLocity(-250,0)
    elseif (runningPG.x <= 220 and runningPG.y <= 635) then
        runningPG:setLinearVeLocity(0,250)
    elseif ( runningPG.y >= 635) then
        runningPG:setLinearVeLocity(0,0)
    end
 end

   local vx,vy = runningPG:getLinearVeLocity()
   if(vx == 0 and vy == 0) then
     runningPG:setLinearVeLocity(0,0)
   end

   Runtime:addEventListener( "enterFrame",pathPg )
end

timer.performWithDelay(600,loopPg,3)

解决方法

这里有一些可以帮助你的东西：

1. 字符速度函数必须参与enterFrame
   
2. 那么你必须从前面的角色中获取角色的速度
   

这不是解决方案，但可以帮助您

    local function pathPg()
        local vx,vy = 0,0 -- this has to be the velocity of the character in front 
        if(runningPG.y >= -190 and runningPG.y < 160) then
            vx,250
            runningPG:setLinearVelocity(vx,vy)
        elseif (runningPG.y >= 160 and runningPG.x >= 220) then
            vx,vy = -250,0
            runningPG:setLinearVelocity(vx,vy)
        elseif (runningPG.x <= 220 and runningPG.y <= 635) then
            vx,vy)
        elseif ( runningPG.y >= 635) then
            vx,vy)
        end
     end
    
       Runtime:addEventListener( "enterFrame",pathPg )
    end