ios - UIDocumentInteractionController 不工作
<p><p>在我的应用程序中,我想下载各种类型的文件并导出,以便用户可以使用打开此类文件的应用程序打开文件。我正在尝试使用 UIDocumentInteractionController 但下载后将其保存到我的设备并尝试打开它会发生几个问题。使用 .docx 时,应用程序会中断,而对于其他文件,它似乎不会对文件进行编码。我做错了什么?</p>
<p>当我尝试通过空投共享文件时,我收到一条错误消息,提示该文件无效。</p>
<p>当我与 iBooks 共享时,我收到消息“NSInternalInconsistencyException”,原因:“UIDocumentInteractionController 过早地消失了! "应用中断</p>
<p>这是我的代码:</p>
<pre><code>func loadArchiveAtIndex(sender: NSNotification){
let itemIndex = sender.userInfo!["index"] as! Int
let archiveKey = sender.userInfo!["downloadKey"] as! String
self.downloadingItens.append(itemIndex)
SQLiteDataController().getTokenSincronismo({
(Valido, Retorno, Token, Tipo) -> Void in
if Valido == true{
switch Retorno {
case 9: // Retorno Válido
let params = [
"tokenSincronizacao":"\(Token)",
"chaveProdutoBiblioteca":"\(archiveKey)"
]
Alamofire.request(.GET, "\(_URLPREFIX)/WSMhobErpServico/api/sincronizar/ProdutoBiblioteca/ObtemProdutoBiblioteca", parameters: params).responseJSON { (response) in
if response.result.isFailure {
print(response.result.error)
} else {
let result = response.result.value
if let archive = result?["ProdutoBiblioteca"] as? NSDictionary{
let bytes = archive.objectForKey("Arquivo") as! String
let name = archive.objectForKey("NomeArquivo") as! String
let data = NSData.init(base64EncodedString: bytes, options: .IgnoreUnknownCharacters)
let url = NSURL.init(string: name.lowercaseString)
data?.writeToURL(url!, atomically: true)
let documents = try! NSFileManager.defaultManager().URLForDirectory(.DocumentDirectory, inDomain: .UserDomainMask, appropriateForURL: nil, create: false)
let fileURL = documents.URLByAppendingPathComponent((name.lowercaseString))
let dic = UIDocumentInteractionController.init(URL: fileURL!)
dic.delegate = self
dic.presentOpenInMenuFromRect(CGRect.init(x: 0, y: 0, width: 200, height: 200), inView: self.view, animated: true)
var arrayIndex = 0
for item in self.downloadingItens {
let i = item
if i == itemIndex {
self.downloadingItens.removeAtIndex(arrayIndex)
NSNotificationCenter.defaultCenter().postNotificationName("reloadTable", object: nil, userInfo: ["itens":self.downloadingItens])
break
}
arrayIndex = arrayIndex + 1
}
} else {
print("erro")
}
}
}
break
default:
self.showError("Atenção", message: "Não foi Possivel Processar a sua Solicitação")
break
}
}else{
self.showError("Atenção", message: "Não foi Possivel Processar a sua Solicitação")
}
}, sincFull:true)
}
func documentInteractionControllerViewForPreview(controller: UIDocumentInteractionController) -> UIView? {
return self.view
}
func documentInteractionControllerRectForPreview(controller: UIDocumentInteractionController) -> CGRect {
return self.view.frame
}
func documentInteractionControllerViewControllerForPreview(controller: UIDocumentInteractionController) -> UIViewController {
return self
}
</code></pre></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>好的,我明白你的意思了。</p>
<p>我已经查看了您的代码,我认为问题出在下面一行</p>
<pre><code> let dic = UIDocumentInteractionController.init(URL: fileURL!)
dic.delegate = self
</code></pre>
<p>您正在 block 内创建 UIDocumentInteractionController 对象,因此当 block 内存不足或被释放时,您的 UIDocumentInteractionController 对象也将被释放。</p>
<p>所以让 UIDocumentInteractionController 对象成为全局对象。为该类全局声明对象,然后在 block 内赋值。</p></p>
<p style="font-size: 20px;">关于ios - UIDocumentInteractionController 不工作,我们在Stack Overflow上找到一个类似的问题:
<a href="https://stackoverflow.com/questions/43848833/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/43848833/
</a>
</p>
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