将CKAsset加载到UIWebView中
问题描述:
我试图加载存储在公共数据库中的PDF文件作为CKAsset,代码在去年发布的现有应用程序中运行良好。不过,我现在得到以下错误将CKAsset加载到UIWebView中
无法将类型“的NSData”的价值强制
这里键入“数据”是代码 -
if docType == "PDF" || docType == "pdf" {
if let asset1 = record.object(forKey: "documentFile") as? CKAsset {
let doc1Data : NSData? = NSData(contentsOf:asset1.fileURL)
let path = (NSTemporaryDirectory() as NSString).appendingPathComponent(filename)
let fileURL = NSURL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent(filename)
do {
try doc1Data!.write(to: URL(fileURLWithPath: path), options: .atomic)
} catch {
print(error)
}
self.docWebView.load(doc1Data! as Data, mimeType: "application/pdf", textEncodingName: "UTF-8", baseURL: NSURL() as URL)
self.filenameURL = [(fileURL)]
}
我敢肯定,必须有一个简单的解释,但我不能看到问题
在此先感谢。
答
尝试改变以下线:
let doc1Data : NSData? = NSData(contentsOf:asset1.fileURL)
到
let doc1Data = NSData(contentsOf:asset1.fileURL)
+0
唉,我仍然得到错误 - 无法将类型'NSData'的值转换为与'self.docWebView.loadData(doc1Data as Data?,MIMEType:“application/pdf”,textEncodingName:“UTF-8”,baseURL: NSURL()作为URL)'代码行 – Bowcaps
答
这样看来答案很简单,改变负载数据到的loadRequest并引用文档的URL已经获得它从CKAsset
if docType == "PDF" || docType == "pdf" {
if let asset1 = record.object(forKey: "documentFile") as? CKAsset {
let doc1Data : NSData! = NSData(contentsOf:asset1.fileURL)
let path = (NSTemporaryDirectory() as NSString).appendingPathComponent(filename)
do {
try doc1Data!.write(to: URL(fileURLWithPath: path), options: .atomic)
let url = URL(fileURLWithPath: path)
let urlRequest = URLRequest(url: url)
self.docWebView?.loadRequest(urlRequest)
} catch {
print(error)
}
}
唉我仍然得到错误 - 无法将类型'NSData'的值转换为在'co'中键入'数据' ercion涉及到'self.docWebView.loadData(doc1Data as Data ?, MIMEType:“application/pdf”,textEncodingName:“UTF-8”,baseURL:NSURL()为URL)'代码行 – Bowcaps