fileManager.createFileAtPath总是失败 [英] fileManager.createFileAtPath always fails

问题描述

我尝试调用fileManager.createFileAtPath方法，但是它总是失败. 我的变量success始终为false.我在这里查看了一些类似的帖子，但没有一个完全适合我的需求. 这是我的代码:

I try to call the fileManager.createFileAtPath-method, but it always fails. My variable success is always false. I looked at some similar posts here but nothing fits my needs exactly. Here is my code:

pListPath = NSURL(fileURLWithPath: String(reportsPath)).URLByAppendingPathComponent("myReports.plist", isDirectory: false)

                let data: NSData = NSData()
                var isDir: ObjCBool = false

            if fileManager.fileExistsAtPath(String(pListPath), isDirectory: &isDir)
                {
                    print("File already exists")
                }
                else
                {

                    let success = fileManager.createFileAtPath(String(pListPath), contents: data, attributes: nil)

                    print("Was file created?: \(success)")
                    print("plistPath: \(pListPath)")
                }

这是我尝试解决此问题的方法:

我尝试使用该方法

let success = NSFileManager.defaultManager().createFileAtPath(String(pListPath), contents: data, attributes: nil)

还有

let success = data.writeToFile(String(pListPath), atomically: true)

但是没有任何效果. success始终为false. 我还尝试给它一个文字字符串作为路径，将contents设置为nil，甚至更改了我想将其设置为777的目录权限，但仍可以使用. success始终为假.希望您能为您提供帮助. 任何帮助，我们将不胜感激.谢谢

But nothing works. successis always false. I also tried to give it a literal-String as a path, set contentsto nil and I even changed the directory permissions where i want to put it to 777, but noting works. successis always false. I hope you can me help out of this. Any help is highly appreciate. Thank you

推荐答案

这是一个问题:

if fileManager.fileExistsAtPath(String(pListPath), isDirectory: &isDir)

您不能使用String(...)将NSURL转换为文件路径字符串， 您必须使用path方法:

You cannot use String(...) to convert a NSURL to a file path string, you have to use the path method:

if fileManager.fileExistsAtPath(pListPath.path!, isDirectory: &isDir)

如果reportsPath也是NSURL，则存在相同的问题

If reportsPath is also an NSURL then the same problem exists at

pListPath = NSURL(fileURLWithPath: String(reportsPath)).URLByAppendingPathComponent("myReports.plist", isDirectory: false)

应该是

let pListPath = reportsPath.URLByAppendingPathComponent("myReports.plist", isDirectory: false)

这篇关于fileManager.createFileAtPath总是失败的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！