模块4
<!-- 点击切换壁纸 -->
Var const="true" expression="1" name="dianji" type="number"/>
<Image y="坐标" x="坐标" src="fs.png" align="center" alignV="center" />
<Button x="坐标" y="坐标" w="250" h="250" >
<Triggers>
<Trigger action="down">【double 是双击】
<VariableCommand expression="ifelse(ge(
#dianji,14)【14是壁纸数量】,1, #dianji+1)" name="dianji"/>
</Trigger>
</Triggers>
</Button>
<Image srcid="#dianji" src="wallpaper/wallpaper.jpg"/>