ios - NSData 在 9.0 版中给我一个错误

Question

下面给出了我用 swift 编写的函数这段代码在 10.0 版本的 iPhone 中工作正常但在 9.0 中给出了一个错误 saying

CFURLCopyResourcePropertyForKey failed because it was passed an URL which has no scheme Failed to load: The file “Recording2017-03-06_11.08.53000.mp3” couldn’t be opened.

partFileURL 将具有

/private/var/mobile/Containers/Data/Application/B8F9055D-D816-4E27-BA2A-B13F0EE97709/tmp/Recording2017-03-06_11.08.53000.mp3

这是我的以下功能-:

//function
func putPartUplaod(partFileURL:URL , partFileNumber:Int)
{
        var partfileData:Data?
        var md5hash:Any?
        var sha256hash:Any?
        //  var error: NSError?   
        let uri:URL = NSURL(fileURLWithPath: partFileURL.absoluteString) as URL

        //Get MD5 Digest
        do{
            print(partFileURL)
            partfileData = try NSData(contentsOf: uri, options: NSData.ReadingOptions.dataReadingMapped) as Data    
            print("hello" , partfileData);
            md5hash = partfileData?.md5().base64EncodedString()  
        }catch let error as NSError {
            print("Failed to load: \(error.localizedDescription)")
        }
}

Answer 1

您可以使用类似 NSData *data = [[NSFileManager defaultManager] contentsAtPath:path]; 您传入的字符串不是有效的 URL，它只是一个文件路径。要使其成为 URL，您需要添加 file:// 的方案。