稍微更改list_simple_in_kv.py以使用ListAdapter代替SimpleListAdapter
,我发现方法#1有效:
from kivy.uix.modalview import ModalView
from kivy.uix.listview import ListView
from kivy.uix.gridlayout import GridLayout
from kivy.lang import Builder
from kivy.app import App
#using 'sla'...whatever that means...
Builder.load_string("""
#:import ListItemButton kivy.uix.listview
#:import sla kivy.adapters.listadapter
<ListViewModal>:
ListView:
size_hint: .8, .8
adapter:
sla.ListAdapter(
data=["Item #{0}".format(i) for i in range(100)],
cls=ListItemButton.ListItemButton)
""")
class ListViewModal(ModalView):
def __init__(self, **kwargs):
super(ListViewModal, self).__init__(**kwargs)
class MainView(GridLayout):
def __init__(self, **kwargs):
kwargs['cols'] = 1
super(MainView, self).__init__(**kwargs)
listview_modal = ListViewModal()
self.add_widget(listview_modal)
class TestApp(App):
def build(self):
root = MainView()
return root
if __name__ == '__main__':
TestApp().run()
但是将kv文件更改为这种方式(与我遇到的其他kv API最符合的方式)失败:
Builder.load_string("""
#:import ListItemButton kivy.uix.listview
#:import ListAdapter kivy.adapters.listadapter
<ListViewModal>:
size_hint: None, None
size: 400, 400
ListView:
size_hint: .8, .8
ListAdapter:
data: ["Item #{0}".format(i) for i in range(100)]
cls: ListItemButton.ListItemButton
""")
我甚至发现了this帖子和this one too,说方法#2应该在master中工作,但它会产生异常:
File "C:\Python27\lib\site-packages\kivy\adapters\adapter.py", line 102, in __init__
raise Exception('adapter: input must include data argument')
Exception: adapter: input must include data argument
我在这里缺少什么?
提前致谢。
答案 0 :(得分:1)
ListAdapter不是Widget,因此您无法使用您尝试使用的语法。我认为最接近你可以做的是为了实现代码的更多Kivyonic外观如下。请注意我更改了导入。这类似于向画布添加指令的方式:
Builder.load_string("""
#:import ListItemButton kivy.uix.listview.ListItemButton
#:import ListAdapter kivy.adapters.listadapter.ListAdapter
<ListViewModal>:
size_hint: None, None
size: 400, 400
ListView:
size_hint: .8, .8
adapter:
ListAdapter(data=["Item #{0}".format(i) for i in range(100)], cls = ListItemButton)
""")
**编辑**
您还更改了size_hint
,因此之前的代码与原始代码看起来非常不同。这个看起来像是原始的。
Builder.load_string("""
#:import ListItemButton kivy.uix.listview.ListItemButton
#:import ListAdapter kivy.adapters.listadapter.ListAdapter
<ListViewModal>:
ListView:
size_hint: .8, .8
adapter:
ListAdapter(data=["Item #{0}".format(i) for i in range(100)], cls = ListItemButton)
""")
答案 1 :(得分:0)
我不确定这个答案,但您没有向adapter
属性添加任何内容。试试这个:
Builder.load_string("""
#:import ListItemButton kivy.uix.listview
#:import ListAdapter kivy.adapters.listadapter
<ListViewModal>:
size_hint: None, None
size: 400, 400
ListView:
size_hint: .8, .8
adapter:
ListAdapter.ListAdapter:
data: ["Item #{0}".format(i) for i in range(100)]
cls: ListItemButton.ListItemButton
""")
我同意sla.ListAdapter不清楚。通常我们可以直接访问该类。告诉我这是否有效:
Builder.load_string("""
#:import ListItemButton kivy.uix.listview.ListItemButton
#:import ListAdapter kivy.adapters.listadapter.ListAdapter
<ListViewModal>:
size_hint: None, None
size: 400, 400
ListView:
size_hint: .8, .8
adapter:
ListAdapter:
data: ["Item #{0}".format(i) for i in range(100)]
cls: ListItemButton
""")
请注意,我更改了ListItemButton
和ListAdapter
的导入。