最近要给App添加支持打开特定类型文件，在参考相关博文时感觉其中的设置都有些过时了，现在特整理下当前可用的实现如下
- 环境 Xcode 9.4.1 Swift 4.1
设置支持文本文件类型
info.plist
<key>CFBundleDocumentTypes</key>
<array>
<dict>
<key>CFBundleTypeIconFiles</key>
<array/>
<key>CFBundleTypeName</key>
<string>json</string>
<key>LSItemContentTypes</key>
<array>
<string>public.data</string>
<string>public.content</string>
</array>
</dict>
</array>
在AppDelegate.swift中接收
func application(_ application: UIApplication, open url: URL, sourceApplication: String?, annotation: Any) -> Bool {
print("open url", url)
let isJson = url.absoluteString.hasSuffix(".json")
if !isJson {
return true
}
do {
var content:String = try String(contentsOf: url, encoding: .utf8)
print(content)
} catch {
print("read file error", error)
}
return true
}