event.yStart

概述

触摸序列“开始”阶段触摸的y位置。

示例

local function drawLine( event )
    if ( event.phase == "ended" ) then
        local line = display.newLine( event.xStart, event.yStart, event.x, event.y )
        line.strokeWidth = 5
    end
end

Runtime:addEventListener( "touch", drawLine )