fix: Apply same FileMode mapping fix to iOS implementation

Copilot · MartinZikmund · Copilot · commit bc3391426eec · 2025-10-22T04:47:21.000Z
Co-authored-by: MartinZikmund &lt;1075116+MartinZikmund@users.noreply.github.com&gt;
diff --git a/src/Uno.UWP/Storage/StorageFile.iOS.cs b/src/Uno.UWP/Storage/StorageFile.iOS.cs
@@ -84,7 +84,7 @@ public override Task<IRandomAccessStreamWithContentType> OpenAsync(CancellationT
 
 			public override Task<Stream> OpenStreamAsync(CancellationToken ct, FileAccessMode accessMode, StorageOpenOptions options)
 			{
-				Func<Stream> streamBuilder = () => File.Open(Path, FileMode.Open, ToFileAccess(accessMode), ToFileShare(options));
+				Func<Stream> streamBuilder = () => File.Open(Path, ToFileMode(accessMode), ToFileAccess(accessMode), ToFileShare(options));
 				var streamWrapper = new SecurityScopeStreamWrapper(_nsUrl, streamBuilder);
 				return Task.FromResult<Stream>(streamWrapper);
 			}

Original file line number	Diff line number	Diff line change
`@@ -84,7 +84,7 @@ public override Task<IRandomAccessStreamWithContentType> OpenAsync(CancellationT`
`84`	`84`
`85`	`85`	`public override Task<Stream> OpenStreamAsync(CancellationToken ct, FileAccessMode accessMode, StorageOpenOptions options)`
`86`	`86`	`{`
`87`		`- Func<Stream> streamBuilder = () => File.Open(Path, FileMode.Open, ToFileAccess(accessMode), ToFileShare(options));`
	`87`	`+ Func<Stream> streamBuilder = () => File.Open(Path, ToFileMode(accessMode), ToFileAccess(accessMode), ToFileShare(options));`
`88`	`88`	`var streamWrapper = new SecurityScopeStreamWrapper(_nsUrl, streamBuilder);`
`89`	`89`	`return Task.FromResult<Stream>(streamWrapper);`
`90`	`90`	`}`