问题描述
目前我只尝试在 iOS 中执行此操作,但我不知道到哪里查找如何描述 iOS 文件类型。这些是“纯文本”文件,但具有特定的奇怪扩展名。我尝试了“文本/纯文本”,但这并没有“点亮”我的 iOS 文件(但确实允许 .CSV 文件)。
这是我开始的代码...
private async void ButtonFMSPick_Clicked( object sender,EventArgs e ) {
FilePickerFileType filePickerFileType = new FilePickerFileType(
new Dictionary<DevicePlatform,IEnumerable<string>> {
{ DevicePlatform.iOS,new [] { "*.ABC","*.123" } },{ DevicePlatform.Android,} );
PickOptions pickOptions = new PickOptions {
PickerTitle = "Select all the files",FileTypes = filePickerFileType,};
var results = await FilePicker.PickMultipleAsync(pickOptions);
if (results == null) {
lblFileContents.Text = "Return NULL";
return;
}
lblFileContents.Text = $" {results.Count()} files picked\r\n";
foreach (var res in results) {
try {
var stream = await res.OpenReadAsync();
lblFileContents.Text += $"File Name: {res.FileName},len={stream.Length},path={res.FullPath}:\r\n";
} catch (Exception ex) {
lblFileContents.Text += $"Exception: {ex}";
}
}
}
更新:我尝试了声明文件类型——摘自下面的 Info.plist,但我对此非常不确定。现在我看到带有我的应用程序图标的“.123”文件类型,但仍然无法选择
<key>CFBundleDocumentTypes</key>
<array>
<dict>
<key>CFBundleTypeName</key>
<string>ABC FILE</string>
<key>LSHandlerRank</key>
<string>Default</string>
<key>LSItemContentTypes</key>
<array>
<string>com.pronktech.abc</string>
</array>
</dict>
<dict>
<key>CFBundleTypeName</key>
<string>123 File</string>
<key>LSHandlerRank</key>
<string>Default</string>
<key>LSItemContentTypes</key>
<array>
<string>com.pronktech.123</string>
</array>
</dict>
</array>
<key>UTExportedTypeDeclarations</key>
<array>
<dict>
<key>UTTypeDescription</key>
<string>ABC FILE</string>
<key>UTTypeIdentifier</key>
<string>com.pronktech.abc</string>
<key>UTTypeConformsTo</key>
<array>
<string>public.data</string>
</array>
<key>UTTypeTagSpecification</key>
<dict>
<key>public.filename-extension</key>
<array>
<string>ABC</string>
<string>abc</string>
</array>
</dict>
</dict>
<dict>
<key>UTTypeDescription</key>
<string>123 File</string>
<key>UTTypeIdentifier</key>
<string>com.pronktech.123</string>
<key>UTTypeConformsTo</key>
<array>
<string>public.data</string>
</array>
<key>UTTypeTagSpecification</key>
<dict>
<key>public.filename-extension</key>
<array>
<string>123</string>
</array>
</dict>
</dict>
</array>
</dict>
解决方法
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