Question

如何检测屏幕是否被触摸？在我看来，触摸屏幕并且手指没有移动时不会生成触摸事件。

Answer 1

是的，仅记录手指移动的更改。放下手指，抬起手指并拖动触发事件。

Answer 2

但是，你可以做到

 e.phase == "began"

在您的活动中。当用户将手指放在屏幕上时会触发。

Answer 3

触摸事件分阶段处理。因此，触摸生成的事件已经“开始”，“移动”，“结束”和“取消”阶段。因此，您可以使用检测：

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)

当您需要检查是否触摸屏幕时，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“自我”更改为您希望收听触摸事件的任何对象

Answer 4

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 )

Corona SDK：触摸事件

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