URL的iOS15 UTType弃用
URL的iOS15 UTType弃用
提问于 2021-10-12 12:35:55
使用Swift5.5、iOS15.0.1、
作为iOS15，我意识到与我现有的URL扩展相关的有相当多的弃用。
我没有找到任何关于如何重写现有扩展的好文档。
这是我目前使用approx的实现。16折旧警告，我不知道如何规避使用iOS15。任何关于这方面的想法都是非常感谢的！
extension URL {
func mimeType() -> String {
let pathExtension = self.pathExtension
if let uti = UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension, pathExtension as NSString, nil)?.takeRetainedValue() {
if let mimetype = UTTypeCopyPreferredTagWithClass(uti, kUTTagClassMIMEType)?.takeRetainedValue() {
return mimetype as String
}
}
return "application/octet-stream"
}
var containsImage: Bool {
let mimeType = self.mimeType()
guard let uti = UTTypeCreatePreferredIdentifierForTag(kUTTagClassMIMEType, mimeType as CFString, nil)?.takeRetainedValue() else {
return false
}
return UTTypeConformsTo(uti, kUTTypeImage)
}
var containsAudio: Bool {
let mimeType = self.mimeType()
guard let uti = UTTypeCreatePreferredIdentifierForTag(kUTTagClassMIMEType, mimeType as CFString, nil)?.takeRetainedValue() else {
return false
}
return UTTypeConformsTo(uti, kUTTypeAudio)
}
var containsVideo: Bool {
let mimeType = self.mimeType()
guard let uti = UTTypeCreatePreferredIdentifierForTag(kUTTagClassMIMEType, mimeType as CFString, nil)?.takeRetainedValue() else {
return false
}
return UTTypeConformsTo(uti, kUTTypeMovie)
}
}回答 2
Stack Overflow用户
发布于 2021-11-24 13:56:36
我的初始URL扩展的iOS15兼容重写如下所示：
import UniformTypeIdentifiers
extension URL {
func mimeType() -> String {
let pathExtension = self.pathExtension
if let type = UTType(filenameExtension: pathExtension) {
if let mimetype = type.preferredMIMEType {
return mimetype as String
}
}
return "application/octet-stream"
}
var containsImage: Bool {
let mimeType = self.mimeType()
if let type = UTType(mimeType: mimeType) {
return type.conforms(to: .image)
}
return false
}
var containsAudio: Bool {
let mimeType = self.mimeType()
if let type = UTType(mimeType: mimeType) {
return type.conforms(to: .audio)
}
return false
}
var containsMovie: Bool {
let mimeType = self.mimeType()
if let type = UTType(mimeType: mimeType) {
return type.conforms(to: .movie) // ex. .mp4-movies
}
return false
}
var containsVideo: Bool {
let mimeType = self.mimeType()
if let type = UTType(mimeType: mimeType) {
return type.conforms(to: .video)
}
return false
}
}Stack Overflow用户
发布于 2021-10-15 11:36:40
为了与get right UUType的iOS 15和更早版本兼容，由于kUTType已被弃用，因此可以使用以下代码
var UTTypeID : Array = [ "url", "data", "plainText"]
// iOS 15 Deprecated kUTType, use UTType
func UTTypeCompat(strID : String) -> String
{
//0 - URL, 1 - Data, 2 - PlainText
let indexUTType:Int? = UTTypeID.firstIndex(of: strID)
if #available(iOS 15.0, *)
{
switch indexUTType {
case 0:
return UTType.url.identifier
case 1:
return UTType.data.identifier
case 2:
return UTType.plainText.identifier
default:
NSLog("Unsupported UUtype: \(strID)")
break
}
}
else
{
switch indexUTType {
case 0:
return kUTTypeURL as String
case 1:
return kUTTypeData as String
case 2:
return kUTTypePlainText as String
default:
NSLog("Unsupported UUtype: \(strID)")
break
}
}
// throw Exception
return "Err"
}和示例如何获取任何版本的iOS的标识符
NSLog(UTTypeCompat(strID: "url"))
NSLog(UTTypeCompat(strID: "data"))
NSLog(UTTypeCompat(strID: "plainText"))页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/69540672
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