Python 2.7 Kivy删除小部件
添加标签后,我很难删除带有标签的小部件 以下是相关的代码:Python 2.7 Kivy删除小部件,python-2.7,widget,kivy,Python 2.7,Widget,Kivy,添加标签后,我很难删除带有标签的小部件 以下是相关的代码: logi= True if data == []: logn =Label(text= "Incorrect Username",color=(190,0,0,1), pos_hint={"right":1.035,"top":1.14}) self.add_widget(logn) logu =Label(text= "Inc
logi= True
if data == []:
logn =Label(text= "Incorrect Username",color=(190,0,0,1),
pos_hint={"right":1.035,"top":1.14})
self.add_widget(logn)
logu =Label(text= "Incorrect Password",color=(190,0,0,1),
pos_hint={"right":1.035,"top":1.04})
self.add_widget(logu)
logi= False
if logi == True:
textinput.text=''
textinput2.text=''
if 'logn' in locals() and 'logu' in locals() :
self.remove_widget(logn)
self.remove_widget(logu)
一旦添加了小部件,我似乎无法删除它们,如果我删除了
if'logn'in locals()和'logu'in locals():
语句,我会得到一个错误“赋值前引用的局部变量”每次我在没有上述if语句的情况下测试此方法时,我都会确保已添加小部件我假设您输入此方法两次(第一次数据=[]第二次数据=[…])。因此,您应该将变量放在手边(将它们放在实例self上)
请注意我添加的所有位置self
logi= True
if data == []:
self.logn =Label(text= "Incorrect Username",color=(190,0,0,1),
pos_hint={"right":1.035,"top":1.14})
self.add_widget(self.logn)
self.logu =Label(text= "Incorrect Password",color=(190,0,0,1),
pos_hint={"right":1.035,"top":1.04})
self.add_widget(self.logu)
logi= False
if logi == True:
textinput.text=''
textinput2.text=''
if hasattr(self, 'logn'): #check that we put something here before...
self.remove_widget(self.logn)
self.remove_widget(self.logu)