Question

我想创建一个包含3-4个文本字段的卡片，每个字段都有一个原生的android滚动条。我按照这里的课程Creating a native scroller to scroll a field。我尝试将相同的代码用于另一张卡片，其中包含3个字段，这些字段组合在一起并进行编码，以便该组具有原生卷轴。通过该卡上的单独按钮可以使每个文本字段可见。打开应用程序时，滚动不起作用。 但是如果我去同一个堆叠上的另一张卡片，只需要空卡片，然后返回到主卡片，滚动就可以了。 所以卡片代码中有些内容我不知道理解并且必须修改，但是什么？

我在卡片中使用此代码：

    global gScrollField
local sScrollerID
on openCard

   local tScrollerRect, tContentRect

   // Only create a scroller on a mobile device
   if environment() is not "mobile" then exit openCard

   // Set the area of the scroller
   put the rect of gScrollField into tScrollerRect

   // Set the are of the content to be scrolled
   put 0,0,(the formattedWidth of gScrollField),(the formattedHeight of gScrollField) into  tContentRect 

   // Create the scroller control
   mobileControlCreate "scroller", "loremScroll"
   put the result into sScrollerID

   // Set the properties of the scroller
   mobileControlSet "loremScroll", "rect", tScrollerRect
   mobileControlSet "loremScroll", "contentRect", tContentRect
   mobileControlSet "loremScroll", "visible", true
   mobileControlSet "loremScroll", "scrollingEnabled", true
   mobileControlSet "loremScroll", "vIndicator", true
   mobileControlSet "loremScroll", "vscroll", 0
end openCard

on closeCard
   // Delete the scroller
   if environment() is not "mobile" then exit closeCard
   mobileControlDelete sScrollerID
end closeCard

on scrollerDidScroll hOffset, vOffset
   // When the user scrolls move the displayed content
   set the vScroll of gScrollField to vOffset
end scrollerDidScroll
 mouseControl

并在导航按钮中显示一个字段并隐藏代码所在的其他字段（例如卡片“b”：

    global gScrollField
on mouseUp
   put the long name of fld "b" into gScrollField
   hide fld "a"
   hide fld "c"
   show fld "b"
end mouseUp

指向堆栈的链接是： scroll 3-4 fields on the same card

Answer 1

问题在于，在按下a，b，c之一按钮之前，没有定义gScrollField：它最初导致preOpenCard处理程序失败。

我将卡片脚本修改为......

    global gScrollField
    local sScrollerID
    local sStarted

    on preOpenCard
       local tScrollerRect, tContentRect

       if sStarted <> true then
          put the long id of fld "a" into gScrollField
          hide fld "c"
          hide fld "b"
          show fld "a"
          put true into sStarted
       end if

       // Only create a scroller on a mobile device
       if environment() is not "mobile" then exit preOpenCard
       .....
       .....
       .....

它工作正常:) sStarted变量在第一次执行时初始化。

1卡上3-4个字段的原生android滚动条不起作用

1 个答案: