如何访问循环视图的单击按钮

Question

这里是初学者。

我不完全确定下面的代码中是否所有内容都是正确的，但它似乎可以使recycleview创建的按钮的大小适应每个按钮的文本。

问题：如何在on_rerelease_m方法中访问(暂时打印(单击按钮的id？

谢谢你抽出时间！

from kivy.config import Config
Config.set('graphics', 'width', '270')
Config.set('graphics', 'height', '550')
from kivy.app import App
from kivy.uix.button import Button
from kivy.uix.recycleview import RecycleView
from kivy.uix.recycleboxlayout import RecycleBoxLayout
from kivy.lang import Builder
# I included this in case you have to use it for the answer instead of the python code:
Builder.load_string("""
<MyRecycleBoxLayout>:
# orientation: 'vertical'
# default_size: None, None
# default_size_hint: 1, None
# size_hint_y: None
# height: self.minimum_height

<MyButton>:
# font_size: 30
# text_size: self.width, None
# size_hint_y: None
# height: self.texture_size[1]
""")
class MyRecycleBoxLayout(RecycleBoxLayout):
def __init__(self,**kwargs):
super().__init__(**kwargs)
self.orientation= 'vertical'
self.default_size= (None, None)
self.default_size_hint=( 1, None)
self.size_hint_y= None
self.bind(minimum_height=self.setter("height"))
class MyButton(Button):
def __init__(self,**kwargs):
super().__init__(**kwargs)
self.font_size=30
self.bind(width=lambda s, w: s.setter("text_size")(s, (w, None)))
self.size_hint_y = None
self.bind(texture_size=self.setter("size"))

class RV(RecycleView):
def __init__(self,**kwargs):
super().__init__(**kwargs)
self.myRecycleBoxLayout=MyRecycleBoxLayout()
self.data.clear()
for i in range(150):
self.data.append({f"text":f"{i} "*50,"id": f"btn_{i}","on_release":self.on_release_m})
self.add_widget(self.myRecycleBoxLayout)
def on_release_m (self,*args):
#Here print the clicked button id and not the first's:
print(self.data[0]["id"])
pass

class RecApp(App):
def build(self):
self.rv=RV()
self.rv.viewclass=MyButton
return self.rv
RecApp().run()

Answer 1

您可以使用partial:将附加信息传递给on_release_m()方法

for i in range(150):
self.data.append({f"text": f"{i} "*50, "id": f"btn_{i}", "on_release": partial(self.on_release_m, i)})

然后，在on_release_m()方法中：

def on_release_m(self, i):
#Here print the clicked button id and not the first's:
print(self.data[i]["id"])