无法在iOS中将文件从捆绑包复制到文档目录
我正在尝试使用以下代码将文件从我的包复制到iOS中的documents目录无法在iOS中将文件从捆绑包复制到文档目录,ios,swift,copy,bundle,Ios,Swift,Copy,Bundle,我正在尝试使用以下代码将文件从我的包复制到iOS中的documents目录 let bundlePath = NSBundle.mainBundle().pathForResource("information", ofType: ".png") print(bundlePath, "\n") //prints the correct path let destPath = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .User
let bundlePath = NSBundle.mainBundle().pathForResource("information", ofType: ".png")
print(bundlePath, "\n") //prints the correct path
let destPath = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).first!
let fileManager = NSFileManager.defaultManager()
let fullDestPath = NSURL(fileURLWithPath: destPath).URLByAppendingPathComponent("information.png")
let fullDestPathString = String(fullDestPath)
print(fileManager.fileExistsAtPath(bundlePath!)) // prints true
do{
try fileManager.copyItemAtPath(bundlePath!, toPath: fullDestPathString)
}catch{
print("\n")
print(error)
}
错误域=nscocaerorrordomain Code=4“文件”information.png“不存在”。UserInfo={NSSourceFilePathErrorKey=/Users/macbookpro/Library/Developer/CoreSimulator/Devices/E58CA1C6-C6F1-4D72-9572-3925675E78A5/data/Containers/Bundle/Application/EFA83E02-5F24-4BB3-B32A-7E755081A730/AutoLayout tuts.app/information.png,NSUserStringVariant=(
复制
),nsdestinationplepath=file:///Users/macbookpro/Library/Developer/CoreSimulator/Devices/E58CA1C6-C6F1-4D72-9572-3925675E78A5/data/Containers/Data/Application/86A1BDD5-FAF2-486E-85A9-CF72A547C6CD/Documents/information.png,NSFilePath=/Users/macbookpro/Library/Developer/CoreSimulator/Devices/E58CA1C6-C6F1-4D72-9572-3925675E78A5/data/Containers/Bundle/Application/EFA83E02-5F24-4BB32A-7E755081A730/AutoLayout tuts.app/information.png,NSUnderlyingError=0x7fb53251cd80{Error Domain=NSPOSIXErrorDomain Code=2“没有这样的文件或目录”}
根据
fileManager.fileExistsAtPath()
文件确实存在。我做错了什么?问题是这一行:
let fullDestPathString = String(fullDestPath)
应该是:
let fullDestPathString = fullDestPath.path
查看错误。问题是目标。请注意文件://
。您的代码没有正确地将URL转换为文件路径。您需要使用NSURL
的path
属性以字符串形式获取路径
在所有调试和检查过程中,您从未验证过
fullDestPathString
的值,要获取字符串路径,您应该使用此
let path = fullDestPath.path
旁注
fileManager.fileExistsAtPath(bundlePath!) == true
是检查值是否为真的方法
fileManager.fileExistsAtPath(bundlePath!)
只是这可能会有一些问题请查找下面的代码。我参考了@rmaddy的答案
func CheckDataBaseOnPathorNot() -> Void {
let bundlePath = Bundle.main.path(forResource: "Project_Expert", ofType: ".db")
print(bundlePath ?? "", "\n") //prints the correct path
let destPath = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true).first!
let fileManager = FileManager.default
let fullDestPath = NSURL(fileURLWithPath: destPath).appendingPathComponent("Project_Expert.db")
let fullDestPathString = fullDestPath!.path
print(fileManager.fileExists(atPath: bundlePath!)) // prints true
if fileManager.fileExists(atPath: fullDestPathString) {
print("File is available")
}else{
do{
try fileManager.copyItem(atPath: bundlePath!, toPath: fullDestPathString)
}catch{
print("\n")
print(error)
}
}
}
检查此代码,如果路径上没有该文件,请复制该文件
谢谢。Swift 3
func copyfileToDocs()
{
let bundlePath = Bundle.main.path(forResource: "db", ofType: ".sqlite")
print(bundlePath!, "\n") //prints the correct path
let destPath = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true).first!
let fileManager = FileManager.default
let fullDestPath = NSURL(fileURLWithPath: destPath).appendingPathComponent("db.sqlite")
let fullDestPathString = fullDestPath?.path
print(fileManager.fileExists(atPath: bundlePath!)) // prints true
do
{
try fileManager.copyItem(atPath: bundlePath!, toPath: fullDestPathString!)
print("DB Copied")
}
catch
{
print("\n")
print(error)
}
}
斯威夫特4
有些答案具有误导性:
打印(fileManager.fileExists(路径:bundlePath!))
因此,提出了这一扩展
版本:
extension FileManager {
func copyfileToUserDocumentDirectory(forResource name: String,
ofType ext: String) throws
{
if let bundlePath = Bundle.main.path(forResource: name, ofType: ext),
let destPath = NSSearchPathForDirectoriesInDomains(.documentDirectory,
.userDomainMask,
true).first {
let fileName = "\(name).\(ext)"
let fullDestPath = URL(fileURLWithPath: destPath)
.appendingPathComponent(fileName)
let fullDestPathString = fullDestPath.path
if !self.fileExists(atPath: fullDestPathString) {
try self.copyItem(atPath: bundlePath, toPath: fullDestPathString)
}
}
}
}
用法
try fileManager.copyfileToUserDocumentDirectory(forResource: "information",
ofType: "png")
...
谢谢,它现在可以工作了。我甚至没有想到查看
fullDestPathString
,因为错误消息:“file information.png不存在”。这就是为什么我完全专注于这一点。同样的问题,但仍然得到了解决problem@TheBaj同意,错误消息令人沮丧地误导!