iOS custom UTI in UIDocumentPickerViewController initWithDocumentTypes

问题

I am trying to open .obj files from iCloud drive in my app throw UIDocumentPickerViewController. I could't find standart UTi for .obj files. So, using this https://developer.apple.com/library/content/qa/qa1587/_index.html I try to add support of this file-extension for my app.

there is info.plist sections :

<key>CFBundleDocumentTypes</key>
<array>
    <dict>
        <key>CFBundleTypeIconFiles</key>
        <array>
            <string>arrow1</string>
        </array>
        <key>CFBundleTypeName</key>
        <string>OBJ model</string>
        <key>CFBundleTypeRole</key>
        <string>Editor</string>
        <key>LSHandlerRank</key>
        <string>Owner</string>
        <key>LSItemContentTypes</key>
        <array>
            <string>com.giena.Interface.obj</string>
        </array>
    </dict>
</array>

<key>UTExportedTypeDeclarations</key>
<array>
    <dict>
        <key>UTTypeConformsTo</key>
        <array>
            <string>public.data</string>
        </array>
        <key>UTTypeDescription</key>
        <string>OBJ model</string>
        <key>UTTypeIdentifier</key>
        <string>com.giena.Interface.obj</string>
        <key>UTTypeSize320IconFile</key>
        <string>arrow1</string>
        <key>UTTypeSize64IconFile</key>
        <string>arrow1</string>
        <key>UTTypeTagSpecification</key>
        <dict>
            <key>public.filename-extension</key>
            <array>
                <string>obj</string>
            </array>
        </dict>
    </dict>
</array>

and there is UIDocumentPickerViewController call:

 UIDocumentPickerViewController *documentPicker = [[UIDocumentPickerViewController alloc] initWithDocumentTypes:@[@"public.text"]     inMode:UIDocumentPickerModeOpen];
    documentPicker.delegate = self;
    documentPicker.modalPresentationStyle = UIModalPresentationFormSheet;
    [self presentViewController:documentPicker animated:YES completion:nil];

When i am running app, i see popup view for file choosing, but .obj files is grey and not-selectable. What am i doing wrong?

回答1:

You should use your custom UTI in the list of document types:

UIDocumentPickerViewController *documentPicker =[[UIDocumentPickerViewController alloc] initWithDocumentTypes:@[@"com.giena.Interface.obj"] inMode:UIDocumentPickerModeOpen];

回答2:

You have to put something like this:

<key>CFBundleDocumentTypes</key>
<array>
    <dict>
        <key>CFBundleDocumentTypes</key>
        <array>
            <dict>
                <key>CFBundleTypeIconFiles</key>
                <array/>
                <key>CFBundleTypeName</key>
                <string>OBJ model</string>
                <key>CFBundleTypeRole</key>
                <string>Editor</string>
                <key>LSHandlerRank</key>
                <string>Owner</string>
                <key>LSItemContentTypes</key>
                <array>
                    <string>obj</string>
                </array>
            </dict>
        </array>
        <key>CFBundleTypeIconFiles</key>
        <array/>
        <key>CFBundleTypeName</key>
        <string>Obj file</string>
        <key>LSItemContentTypes</key>
        <array>
            <string>com.giena.Interface.document.obj</string>
        </array>
    </dict>
</array>

and

<key>UTExportedTypeDeclarations</key>
<array>
    <dict>
        <key>UTTypeConformsTo</key>
        <array>
            <string>public.data</string>
        </array>
        <key>UTTypeDescription</key>
        <string>OBJ model</string>
        <key>UTTypeIconFiles</key>
        <array/>
        <key>UTTypeIdentifier</key>
        <string>com.giena.Interface.document.obj</string>
        <key>UTTypeTagSpecification</key>
        <dict>
            <key>public.filename-extension</key>
            <array>
                <string>obj</string>
            </array>
        </dict>
    </dict>
    <dict/>
</array>

Also in your controller you have to put something like this:

let documentPicker = UIDocumentPickerViewController(documentTypes: ["com.giena.Interface.document.obj"], in: .import)

It should work

来源：https://stackoverflow.com/questions/44766527/ios-custom-uti-in-uidocumentpickerviewcontroller-initwithdocumenttypes

标签

ios

info.plist

uti