登录界面是根据个人设想简单设计的，效果如下：
代码如下，新建login.kv
<LoginPage>:FloatLayout:canvas.before:Rectangle:size:self.sizepos:self.possource:"image/bg2.png"Image:source:"image/home.png"pos_hint:{'x':0,'y':.3}GridLayout:size_hint:.6,.2pos_hint:{'x':0.2,'y':.6}cols:1Label:text:'Sign in'color:255,218,185,1bold:Truefont_size:30font_name:'packages/DroidSansFallback.ttf'GridLayout: