UIDocumentPickerViewController自定义APK的UTI在iOS16.1无法选取文件的兼容问题

问题 #

我用以下代码实现UIDocumentPickerViewController：

if #available(iOS 14.0, *) {
    let apkType = UTType("com.coocaa.apk")
    let docPickerVC = UIDocumentPickerViewController(forOpeningContentTypes: [apkType!])
    docPickerVC.delegate = self
    present(docPickerVC, animated: true)
} else {
    let types = ["com.coocaa.apk"]
    let docPickerVC = UIDocumentPickerViewController(documentTypes: types, in: .open)
    present(docPickerVC, animated: true)
}

目前该代码在iOS14和iOS16.5系统中可正常选取.apk文件，但在iOS16.1系统中无法选取。我已在info.plist中添加如下配置：

<key>UTExportedTypeDeclarations</key>
<key>UTExportedTypeDeclarations</key>
<array>
    <dict>
        <key>UTTypeConformsTo</key>
        <array>
            <string>public.data</string>
            <string>public.archive</string>
        </array>
        <key>UTTypeDescription</key>
        <string>apk statements</string>
        <key>UTTypeIdentifier</key>
        <string>com.coocaa.apk</string>
        <key>UTTypeTagSpecification</key>
        <dict>
            <key>public.filename-extension</key>
            <array>
                <string>apk</string>
            </array>
        </dict>
    </dict>
</array>

请问如何调整才能让UIDocumentPickerViewController在所有iOS系统中都允许选取.apk文件？

解决方案 #

1. 修复info.plist的重复键与补全UTI配置 #

你的UTExportedTypeDeclarations键重复，会导致部分iOS版本解析UTI异常。删除重复键，并补充APK的标准MIME类型标签，让系统更精准识别文件：

<key>UTExportedTypeDeclarations</key>
<array>
    <dict>
        <key>UTTypeConformsTo</key>
        <array>
            <string>public.data</string>
            <string>public.archive</string>
        </array>
        <key>UTTypeDescription</key>
        <string>APK Package File</string>
        <key>UTTypeIdentifier</key>
        <string>com.coocaa.apk</string>
        <key>UTTypeTagSpecification</key>
        <dict>
            <key>public.filename-extension</key>
            <array>
                <string>apk</string>
            </array>
            <key>public.mime-type</key>
            <string>application/vnd.android.package-archive</string>
        </dict>
    </dict>
</array>

2. 调整代码兼容多版本iOS #

避免强制解包UTType，同时添加通用public.data作为兜底类型，弥补自定义UTI在特定版本的识别漏洞：

if #available(iOS 14.0, *) {
    let apkUTI = UTType("com.coocaa.apk") ?? UTType.data
    let docPickerVC = UIDocumentPickerViewController(forOpeningContentTypes: [apkUTI, .data])
    docPickerVC.delegate = self
    present(docPickerVC, animated: true)
} else {
    let types = ["com.coocaa.apk", "public.data"]
    let docPickerVC = UIDocumentPickerViewController(documentTypes: types, in: .open)
    present(docPickerVC, animated: true)
}

3. 验证UTI配置有效性 #

建议通过Xcode的Info标签页可视化编辑UTI，避免手动编写XML时出现格式错误，确保系统能正确读取自定义UTI规则。

内容的提问来源于stack exchange，提问作者Kenny