如何关闭地图和文本框

Question

我是Coronoa和Lua的新手,我正在试图弄清楚如何关闭地图和文本框.地图和文本框出现在主屏幕上,我能够创建一个按钮(只是一个类型的黑色x)并使其关闭,但我无法关闭地图或文本框.下面是我正在使用的代码片段,但我被卡住了.我搜索了Google,并阅读了他们的文档,我只是遗漏了一些东西.

 local obj = display.newImageRect( "closeButton.jpg" ,25,25 )
            obj.x = 60
            obj.y = 410     -- replaced with newImageRect for dynamic scaling (adjust X & Y as required)

    obj.touch = function (event)
             local btn = event.target
                if event.phase == "ended" then 
                btn.alpha = 0  -- example to show the function doing something
                myMap.alpha = 0
                textBox.alpha = 0
            end

    end

    -- begin detecting touches
    obj:addEventListener( "touch", obj.touch)

myMap = native.newMapView( 25, 0, 275, 180 )
myMap.mapType = "hybrid" -- other mapType options are "satellite" or "hybrid"
myMap.isScrollEnabled = true
myMap.isZoomEnabled = true 
myMap.isLocationUpdating = true
isVisible = myMap.isLocationVisible
myMap:setCenter( 38.354614, -81.726351 )
myMap:addMarker(  38.354614, -81.726351)
-- Adding the Text Box that contains the Directions
textBox = native.newTextBox( 22, 183, 280, 225 )
textBox.text = "blah blah blah boring directions."
local group = display.newGroup()
group:insert( obj )

我一直在"尝试索引本地'myMap'(一个零值)",以及textBox的相同错误.所以,如果有人可以帮助,它的赞赏.

Answer 1

在本地声明'obj.touch'函数上方的'MapView'和'textBox',如下所示:

 local myMap;
 local textBox;

注意:模拟器中不支持Corona mapView.

继续编码.................