Swift - 文件,文件夹操作大全
2016-07-20 17:16
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已更新到swift3
ios开发经常会遇到读文件,写文件等,对文件和文件夹的操作,这时就可以使用FileManager,FileHandle等类来实现。
下面总结了各种常用的操作:
1,遍历一个目录下的所有文件
2,判断文件或文件夹是否存在
3,创建文件夹
方式1:
方式2:
4,将对象写入文件
可以通过writeToFile方法,可以创建文件并将对象写入,对象包括String,NSString,UIImage,NSArray,NSDictionary等。
(1)把String保存到文件
(2)把图片保存到文件路径下
(3)把NSArray保存到文件路径下
(4)把NSDictionary保存到文件路径下
5,创建文件
6,复制文件
(1)方法1
(2)方法2
7,移动文件
(1)方法1
let homeDirectory = NSHomeDirectory()
let srcUrl = homeDirectory + "/Documents/hangge.txt"
let toUrl = homeDirectory + "/Documents/moved"
try! fileManager.moveItem(srcUrl, toPath: toUrl)[/code]
(2)方法2
let urlForDocument =
let url = urlForDocument[0]
let srcUrl = url.
let toUrl = url.
// 移动srcUrl中的文件(test.txt)到toUrl中(copyed.txt)
try! manager.moveItemAtURL(srcUrl, toURL: toUrl)[/code]
8,删除文件
(1)方法1
let homeDirectory = NSHomeDirectory()
let srcUrl = homeDirectory + "/Documents/hangge.txt"
try! fileManager.removeItem(srcUrl)[/code]
(2)方法2
let urlForDocument = manager.urls(
let url = urlForDocument[0]
let toUrl = url.
// 删除文档根目录下的toUrl路径的文件(copyed.txt文件)
try! manager.removeItem(toUrl)[/code]
9,删除目录下所有的文件
(1)方法1:获取所有文件,然后遍历删除
let myDirectory = NSHomeDirectory() + "/Documents/Files"
let fileArray = fileManager.subpaths(
for fn in fileArray!{
try! fileManager.removeItem(myDirectory + "/\(fn)")
}[/code]
(2)方法2:删除目录后重新创建该目录
let myDirectory = NSHomeDirectory() + "/Documents/Files"
try! fileManager.removeItem(
try! fileManager.createDirectory(
attributes: nil)[/code]
10,读取文件 here
let urlsForDocDirectory = manager.
let docPath:NSURL = urlsForDocDirectory[0]
let file = docPath.appendingPathComponent("test.txt")
//方法1
let readHandler = try! FileHandle(forReadingFrom:file)
let data = readHandler.readDataToEndOfFile()
let readString = String(data: data, encoding:
print("文件内容: \(readString)")
//方法2
let data = manager.contents(
let readString = String(data: data!, encoding:
print("文件内容: \(readString)")[/code]
11,在任意位置写入数据
let docPath:NSURL = urlsForDocDirectory[0]
let file = docPath.appendingPathComponent("test.txt")
let string = "添加一些文字到末尾"
let appendedData = string.
let writeHandler = try? FileHandle(forWritingTo:file)
writeHandler!.seekToEndOfFile()
writeHandler!.writeData(appendedData!)[/code]
12,文件权限判断
let docPath:NSURL =
let file = docPath.appendingPathComponent("test.txt")
let readable = manager.isReadableFile(atPath:file.path!)
print("可读: \(readable)")
let writeable = manager.isWritableFile(atPath:file.path!)
print("可写: \(writeable)")
let executable = manager.isExecutableFile(atPath:file.path!)
print("可执行: \(executable)")
let deleteable = manager.isDeletableFile(atPath:file.path!)
print("可删除: \(deleteable)")[/code]
13,获取文件属性(创建时间,修改时间,文件大小,文件类型等信息)
let docPath:NSURL = urlsForDocDirectory[0]
let file = docPath.appendingPathComponent("test.txt")
let attributes = try? manager.attributesOfItem(
print("attributes: \(attributes!)")[/code]
14,文件/文件夹比较
let docPath:NSURL =
let contents = try! manager.contentsOfDirectory(
//下面比较前面两个文件是否内容相同(该方法也可以用来比较目录)
let count = contents.count
if count > 1 {
let path1 = docPath.path! + "/" + (contents[0] as String)
let path2 = docPath.path! + "/" + (contents[1] as String)
let equal = manager.contentsEqualAtPath(path1,andPath:path2)
print("比较结果: \(equal)")
}[/code]
原文出自:www.hangge.com 转载请保留原文链接:http://www.hangge.com/blog/cache/detail_527.html 感谢航哥
ios开发经常会遇到读文件,写文件等,对文件和文件夹的操作,这时就可以使用FileManager,FileHandle等类来实现。
下面总结了各种常用的操作:
1,遍历一个目录下的所有文件
//1、首先我们获取用户文档目录路径 let manager = FileManager.default let urlForDocument = manager.urls(for: .documentDirectory,in: .userDomainMask) let url = urlForDocument[0] as URL print(url) //2、对指定的路径执行浅搜索,返回制定目录路径下的文件、子目录及符号链接的列表 let contentsOfPath = try? manager.contentsOfDirectory(atPath:url.path) print("contentsOfPath:\(String(describing: contentsOfPath))") //3、类似上面的,对指定路径执行浅搜索,返回制定目录路径下的文件、子目录及符号链接的列表 let hcontentsOfPath = try? manager.contentsOfDirectory(at: url, includingPropertiesForKeys: nil, options: .skipsHiddenFiles) print("hcontentsOfPath:\(String(describing: hcontentsOfPath))") //4、深度遍历,会递归遍历子文件夹(但不会递归符号链接) let enumeratorAtPath = manager.enumerator(atPath:url.path) print("enumeratorAtPath:\(String(describing: enumeratorAtPath))") //5、类似上面的,深度遍历,会递归遍历子文件夹(但不会递归符号链接) let eunmeratorAtURL = manager.enumerator(at: url, includingPropertiesForKeys: nil, options: .skipsHiddenFiles, errorHandler: nil) print("enumeratorAtURL:\(String(describing: eunmeratorAtURL?.allObjects))") //6、深度遍历,会递归遍历子文件夹(包括符号链接,所以要求性能的话用enumeratorAtPath) let subPaths = manager.subpaths(atPath:url.path) print("subpaths:\(String(describing: subPaths))")
2,判断文件或文件夹是否存在
//判断文件夹是否存在 let filePaths:String = NSHomeDirectory() + "/Documents/test1" print(filePaths) let exist = manager.fileExists(atPath:filePaths) print(exist) if exist { print("有") }else { print("无") }
3,创建文件夹
方式1:
let myDirectory:String = NSHomeDirectory() + "/Documents/myFile/Files" let fileManager = FileManager.default //withIntermediateDirectories为ture表示路径中间如果有不存在的文件夹都会创建 try! fileManager.createDirectory(atPath:myDirectory, withIntermediateDirectories: true, attributes: nil)
方式2:
func creatFiles(name:String,baseURL:NSURL) { let hmanager = FileManager.default let myFolders = baseURL.appendingPathComponent(name, isDirectory: true) print("文件夹:\(String(describing: myFolders))") let exist = hmanager.fileExists(atPath:myFolders!.path) if !exist { try! hmanager.createDirectory(at: myFolders!, withIntermediateDirectories: true, attributes: nil) } } let hurlForDocument = fileManager.urls(for: .documentDirectory,in: .userDomainMask) let hurl = urlForDocument[0] as NSURL creatFiles(name: "Folder", baseURL: hurl)
4,将对象写入文件
可以通过writeToFile方法,可以创建文件并将对象写入,对象包括String,NSString,UIImage,NSArray,NSDictionary等。
(1)把String保存到文件
let hfilepath:String = NSHomeDirectory() + "/Documents/hero.txt" let info = "欢迎来到hero11223.com" try! info.write(toFile: hfilepath, atomically: true, encoding: String.Encoding.utf8)
(2)把图片保存到文件路径下
let h1filePath:String = NSHomeDirectory() + "/Documents/hero.png" let himage = UIImage(named: "Icon_180.png") let hdata:Data = UIImagePNGRepresentation(himage!)! try? hdata.write(to: URL(fileURLWithPath: h1filePath))
(3)把NSArray保存到文件路径下
let array:NSArray = ["aaa","bbb","ccc"] print(array) let h2filePath:String = NSHomeDirectory() + "/Documents/array.plist" print(h2filePath) array.write(toFile: h2filePath, atomically: true)
(4)把NSDictionary保存到文件路径下
let dictionary:NSDictionary = ["gold":"1kl","silver":"2k"] print(dictionary) let h3filePath:String = NSHomeDirectory() + "/Documents/dictionary.plist" print(h3filePath) dictionary.write(toFile: h3filePath, atomically: true)
5,创建文件
//创建文件 func creatFile(name:String,baseurl:URL) { let manager = FileManager.default let file = baseurl.appendingPathComponent(name) print("文件:\(file)") let exist = manager.fileExists(atPath:file.path) if !exist { let data = Data(base64Encoded:"aGVsbG8gd29ybGQ=" ,options:.ignoreUnknownCharacters) let createSuccess = manager.createFile(atPath:file.path, contents: data, attributes: nil) print("文件创建结果:\(createSuccess)") } } //在文档目录下新建test.txt文件 let h1urlForDocument = manager.urls(for: .documentDirectory,in: .userDomainMask) let h1url = urlForDocument[0] creatFile(name: "hero11.txt", baseurl: h1url)
6,复制文件
(1)方法1
(2)方法2
7,移动文件
(1)方法1
let fileManager = [code]FileManager
.
default
let homeDirectory = NSHomeDirectory()
let srcUrl = homeDirectory + "/Documents/hangge.txt"
let toUrl = homeDirectory + "/Documents/moved"
try! fileManager.moveItem(srcUrl, toPath: toUrl)[/code]
(2)方法2
// 定位到用户文档目录 let manager = [code]FileManager
.
default
let urlForDocument =
manager.urls(
for
: .documentDirectory,
in
:.userDomainMask)
let url = urlForDocument[0]
let srcUrl = url.
appendingPathComponent("test.txt")
let toUrl = url.
appendingPathComponent("copyed.txt")
// 移动srcUrl中的文件(test.txt)到toUrl中(copyed.txt)
try! manager.moveItemAtURL(srcUrl, toURL: toUrl)[/code]
8,删除文件
(1)方法1
let fileManager = [code]FileManager
.
default
let homeDirectory = NSHomeDirectory()
let srcUrl = homeDirectory + "/Documents/hangge.txt"
try! fileManager.removeItem(srcUrl)[/code]
(2)方法2
// 定位到用户文档目录 let manager = [code]FileManager
.
default
let urlForDocument = manager.urls(
for
: .documentDirectory,
in
:.userDomainMask)
let url = urlForDocument[0]
let toUrl = url.
appendingPathComponent("copyed.txt")
// 删除文档根目录下的toUrl路径的文件(copyed.txt文件)
try! manager.removeItem(toUrl)[/code]
9,删除目录下所有的文件
(1)方法1:获取所有文件,然后遍历删除
let fileManager = [code]FileManager
.
default
let myDirectory = NSHomeDirectory() + "/Documents/Files"
let fileArray = fileManager.subpaths(
atPath:myDirectory)
for fn in fileArray!{
try! fileManager.removeItem(myDirectory + "/\(fn)")
}[/code]
(2)方法2:删除目录后重新创建该目录
let fileManager = [code]
FileManager
.
default
let myDirectory = NSHomeDirectory() + "/Documents/Files"
try! fileManager.removeItem(
atPath:myDirectory)
try! fileManager.createDirectory(
atPath:myDirectory, withIntermediateDirectories: true,
attributes: nil)[/code]
10,读取文件 here
let manager = [code]
FileManager
.
default
let urlsForDocDirectory = manager.
urls(
for
: .documentDirectory,
in
:.userDomainMask)
let docPath:NSURL = urlsForDocDirectory[0]
let file = docPath.appendingPathComponent("test.txt")
//方法1
let readHandler = try! FileHandle(forReadingFrom:file)
let data = readHandler.readDataToEndOfFile()
let readString = String(data: data, encoding:
String
.
Encoding
.utf8)
print("文件内容: \(readString)")
//方法2
let data = manager.contents(
atPath:file.path)
let readString = String(data: data!, encoding:
String
.
Encoding
.utf8)
print("文件内容: \(readString)")[/code]
11,在任意位置写入数据
let manager = FileManager.default let urlsForDocDirectory = manager.[code]urls(
for
:.documentDirectory,
in
:.userDomainMask)
let docPath:NSURL = urlsForDocDirectory[0]
let file = docPath.appendingPathComponent("test.txt")
let string = "添加一些文字到末尾"
let appendedData = string.
data(using:
String
.
Encoding
.utf8, allowLossyConversion:
true
)
let writeHandler = try? FileHandle(forWritingTo:file)
writeHandler!.seekToEndOfFile()
writeHandler!.writeData(appendedData!)[/code]
12,文件权限判断
let manager = FileManager.default let [code]urlForDocument= manager.
urls(
for
: .documentDirectory,
in
:.userDomainMask)
let docPath:NSURL =
urlForDocument[0]
let file = docPath.appendingPathComponent("test.txt")
let readable = manager.isReadableFile(atPath:file.path!)
print("可读: \(readable)")
let writeable = manager.isWritableFile(atPath:file.path!)
print("可写: \(writeable)")
let executable = manager.isExecutableFile(atPath:file.path!)
print("可执行: \(executable)")
let deleteable = manager.isDeletableFile(atPath:file.path!)
print("可删除: \(deleteable)")[/code]
13,获取文件属性(创建时间,修改时间,文件大小,文件类型等信息)
let manager = FileManager.default let [code]urlForDocument= manager.
urls(
for
: .documentDirectory,
in
:.userDomainMask)
let docPath:NSURL = urlsForDocDirectory[0]
let file = docPath.appendingPathComponent("test.txt")
let attributes = try? manager.attributesOfItem(
atPath:file.path!) //结果为AnyObject类型
print("attributes: \(attributes!)")[/code]
14,文件/文件夹比较
let manager = FileManager.default let [code]urlForDocument= manager.
urls(
for
: .documentDirectory,
in
:.userDomainMask)
let docPath:NSURL =
urlForDocument[0]
let contents = try! manager.contentsOfDirectory(
atPath:docPath.path!)
//下面比较前面两个文件是否内容相同(该方法也可以用来比较目录)
let count = contents.count
if count > 1 {
let path1 = docPath.path! + "/" + (contents[0] as String)
let path2 = docPath.path! + "/" + (contents[1] as String)
let equal = manager.contentsEqualAtPath(path1,andPath:path2)
print("比较结果: \(equal)")
}[/code]
原文出自:www.hangge.com 转载请保留原文链接:http://www.hangge.com/blog/cache/detail_527.html 感谢航哥
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