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1710793b
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体验新版 GitCode,发现更多精彩内容 >>
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提交
1710793b
编写于
8月 08, 2023
作者:
X
Xiaotian Gu
提交者:
GitHub
8月 08, 2023
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差异文件
Merge pull request #13155 from unoplatform/dev/xygu/20230807/ios-lv-crash
上级
47ef5a29
7c543657
变更
2
隐藏空白更改
内联
并排
Showing
2 changed file
with
40 addition
and
2 deletion
+40
-2
src/Uno.UI/Extensions/EnumerableExtensions.cs
src/Uno.UI/Extensions/EnumerableExtensions.cs
+38
-0
src/Uno.UI/UI/Xaml/Controls/ListViewBase/VirtualizingPanelLayout.iOS.cs
...Xaml/Controls/ListViewBase/VirtualizingPanelLayout.iOS.cs
+2
-2
未找到文件。
src/Uno.UI/Extensions/EnumerableExtensions.cs
浏览文件 @
1710793b
...
...
@@ -34,5 +34,43 @@ namespace Uno.UI.Extensions
return
output
;
}
/// <summary>
/// ToDictionary that doesn't throw on duplicated key. The first value is kept per key.
/// </summary>
public
static
Dictionary
<
TKey
,
TElement
>
ToDictionaryKeepFirst
<
TSource
,
TKey
,
TElement
>(
this
IEnumerable
<
TSource
>
source
,
Func
<
TSource
,
TKey
>
keySelector
,
Func
<
TSource
,
TElement
>
elementSelector
)
where
TKey
:
notnull
{
var
result
=
new
Dictionary
<
TKey
,
TElement
>();
foreach
(
var
item
in
source
)
{
result
.
TryAdd
(
keySelector
(
item
),
elementSelector
(
item
));
}
return
result
;
}
/// <summary>
/// ToDictionary that doesn't throw on duplicated key. The last value is kept per key.
/// </summary>
public
static
Dictionary
<
TKey
,
TElement
>
ToDictionaryKeepLast
<
TSource
,
TKey
,
TElement
>(
this
IEnumerable
<
TSource
>
source
,
Func
<
TSource
,
TKey
>
keySelector
,
Func
<
TSource
,
TElement
>
elementSelector
)
where
TKey
:
notnull
{
var
result
=
new
Dictionary
<
TKey
,
TElement
>();
foreach
(
var
item
in
source
)
{
result
[
keySelector
(
item
)]
=
elementSelector
(
item
);
}
return
result
;
}
}
}
src/Uno.UI/UI/Xaml/Controls/ListViewBase/VirtualizingPanelLayout.iOS.cs
浏览文件 @
1710793b
...
...
@@ -591,13 +591,13 @@ namespace Windows.UI.Xaml.Controls
// We are layouting after an INotifyCollectionChanged operation(s). Cache the previous element sizes, under their new index
// paths, so we can reuse them in order not to have to lay out elements with different databound sizes with their static size.
oldItemSizes
=
_itemLayoutInfos
.
SelectMany
(
kvp
=>
kvp
.
Value
)
.
ToDictionary
(
.
ToDictionary
KeepLast
(
kvp
=>
OffsetIndexForPendingChanges
(
kvp
.
Key
,
NativeListViewBase
.
ListViewItemElementKind
),
kvp
=>
(
CGSize
?)
kvp
.
Value
.
Size
);
oldGroupHeaderSizes
=
_supplementaryLayoutInfos
.
UnoGetValueOrDefault
(
NativeListViewBase
.
ListViewSectionHeaderElementKind
)?
.
ToDictionary
(
.
ToDictionary
KeepLast
(
kvp
=>
OffsetIndexForPendingChanges
(
kvp
.
Key
,
NativeListViewBase
.
ListViewSectionHeaderElementKind
).
Section
,
kvp
=>
(
CGSize
?)
kvp
.
Value
.
Size
);
...
...
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