电晕SDK：触摸事件

如何检测屏幕是否被触摸？在我看来，触摸屏幕和手指不移动时不会生成触摸事件。

是的，只记录手指移动的变化。放下手指，抬起手指并在事件周围拖动。

但是，您可以这样做

 e.phase == "began"

---

在您的事件函数中。这将在用户将手指放在屏幕上时触发。

触摸事件分阶段处理。因此，触摸产生的事件已经开始、移动、结束和取消了阶段。因此，您可以通过执行以下操作来使用检测：

self.isTouched = false;

function defaultTouchHandler(e)
    if(e.phase == "began") then
        print("Tapped")
        self.isTouched = true;
        --User has touched the screen (not moving). Do "onMouseDown" things here
    elseif(e.phase == "moved") then
        print("Moved")
        --User is moving their finger wile touching. Do "onMouseMoved" things here
    elseif(e.phase == "cancelled" or e.phase == "ended") then
        print("End of touch")
        self.isTouched = false;
        --User lifted their finger, or an interrupt happened. Do "onMouseUp" things here
    end
end

self:addEventListener("touch", defaultTouchHandler)

当您需要检查屏幕是否被触摸时，只需执行以下操作：

if(isTouched) then
    --Screen is being touched
else
    --Screen is not being touched
end

编辑：显然，您可以将addEventListener行上的self更改为您希望在其上侦听触摸事件的任何对象

local object = display.newImage( "ball.png" )
object.id = "ball object"

 local function onObjectTouch( event )
if ( event.phase == "began" ) then
    print( "Touch event began on: " .. event.target.id )
elseif ( event.phase == "ended" ) then
    print( "Touch event ended on: " .. event.target.id )
end
return true
end
object:addEventListener( "touch", onObjectTouch )