blocks|key|4592067|text|使用writeToFile:options:error:查看错误内容：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4592068|var+error:+NSError?
var+bytes+=+NSKeyedArchiver.archivedDataWithRootObject(data)
if+!bytes.writeToFile(path,+options:+nil,+error:+&error)+{
++++if+let+actualError+=+error+{
++++++++println(actualError)
++++}
}|code-block|syntax|javascript|4592069|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.apple.com/library/ios/documentation/cocoa/reference/foundation/classes/NSData_Class/Reference/Reference.html#//apple_ref/occ/instm/NSData/writeToFile:options:error:^0|2|Q|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

Use <a href="https://developer.apple.com/library/ios/documentation/cocoa/reference/foundation/classes/NSData_Class/Reference/Reference.html#//apple_ref/occ/instm/NSData/writeToFile:options:error:" rel="nofollow">writeToFile:options:error:</a> and see what the error says:

<pre><code>var error: NSError?
var bytes = NSKeyedArchiver.archivedDataWithRootObject(data)
if !bytes.writeToFile(path, options: nil, error: &amp;error) {
 if let actualError = error {
 println(actualError)
 }
}
</code></pre>

blocks|key|85743|text|显然，该文件不在可写位置，所以我在文档目录中创建了它。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|85744|var+paths+=+NSSearchPathForDirectoriesInDomains(.DocumentDirectory,+.UserDomainMask,+true)[0]+as+String
var+path+=+paths.stringByAppendingPathComponent("data.plist")
var+fileManager+=+NSFileManager.defaultManager()
if+(!(fileManager.fileExistsAtPath(path)))
{
++++var+bundle+:+NSString+=+NSBundle.mainBundle().pathForResource("data",+ofType:+"plist")
++++fileManager.copyItemAtPath(bundle,+toPath:+path,+error:nil)
}
data.setObject(object,+forKey:+"object")
data.writeToFile(path,+atomically:+true)|code-block|syntax|javascript|85745|然后，它必须从文档目录中读取。|85746|var+paths+=+NSSearchPathForDirectoriesInDomains(.DocumentDirectory,+.UserDomainMask,+true)[0]+as+String
var+path+=+paths.stringByAppendingPathComponent("data.plist")
let+save+=+NSDictionary(contentsOfFile:+path)|85747|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Apparently the file is not in a writable location, so I created it in the documents directory. 

<pre><code>var paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as String
var path = paths.stringByAppendingPathComponent("data.plist")
var fileManager = NSFileManager.defaultManager()
if (!(fileManager.fileExistsAtPath(path)))
{
 var bundle : NSString = NSBundle.mainBundle().pathForResource("data", ofType: "plist")
 fileManager.copyItemAtPath(bundle, toPath: path, error:nil)
}
data.setObject(object, forKey: "object")
data.writeToFile(path, atomically: true)
</code></pre>

Then, it has to be read from the documents directory.

<pre><code>var paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as String
var path = paths.stringByAppendingPathComponent("data.plist")
let save = NSDictionary(contentsOfFile: path)
</code></pre>

blocks|key|85757|text|更新Rebeloper的swift代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|85758|let+BedroomFloorKey+=+"BedroomFloor"
let+BedroomWallKey+=+"BedroomWall"
var+bedroomFloorID:+AnyObject+=+101
var+bedroomWallID:+AnyObject+=+101

+func+saveGameData()
++++{
++++++++let+paths+=+NSSearchPathForDirectoriesInDomains(.DocumentDirectory,+.UserDomainMask,+true)+as+NSArray
++++++++let+documentsDirectory+=+paths.objectAtIndex(0)+as!+NSString
++++++++let+path+=+documentsDirectory.stringByAppendingPathComponent("GameData.plist")
++++++++let+dict:+NSMutableDictionary+=+["XInitializerItem":+"DoNotEverChangeMe"]

++++++++//saving+values
++++++++dict.setObject(bedroomFloorID,+forKey:+BedroomFloorKey)
++++++++dict.setObject(bedroomWallID,+forKey:+BedroomWallKey)
++++++++//...
++++++++//writing+to+GameData.plist
++++++++dict.writeToFile(path,+atomically:+false)
++++++++let+resultDictionary+=+NSMutableDictionary(contentsOfFile:+path)
++++++++print("Saved+GameData.plist+file+is+-->+\(resultDictionary?.description)")

++++++++self.loadGameData()

++++}//eom


++++func+loadGameData()+{
++++++++//+getting+path+to+GameData.plist

++++++++let+paths+=+NSSearchPathForDirectoriesInDomains(.DocumentDirectory,+.UserDomainMask,+true)+as+NSArray
++++++++let+documentsDirectory+=+paths[0]+as!+NSString
++++++++let+path+=+documentsDirectory.stringByAppendingPathComponent("GameData.plist")

//++++++++let+path+=+documentsDirectory.stringByAppendingPathComponent("GameData.plist")
++++++++let+fileManager+=+NSFileManager.defaultManager()

++++++++//check+if+file+exists
++++++++if(!fileManager.fileExistsAtPath(path))
++++++++{
++++++++++++//+If+it+doesn't,+copy+it+from+the+default+file+in+the+Bundle

++++++++++++if+let+bundlePath+=+NSBundle.mainBundle().pathForResource("GameData",+ofType:+"plist")
++++++++++++{
++++++++++++++++let+resultDictionary+=+NSMutableDictionary(contentsOfFile:+bundlePath)
++++++++++++++++print("Bundle+GameData.plist+file+is+-->+\(resultDictionary?.description)")

++++++++++++++++do
++++++++++++++++{
++++++++++++++++++++try+fileManager.copyItemAtPath(bundlePath,+toPath:+path)
++++++++++++++++++++print("copy")
++++++++++++++++}
++++++++++++++++catch+_
++++++++++++++++{
++++++++++++++++++++print("error+failed+loading+data")
++++++++++++++++}
++++++++++++}
++++++++++++else
++++++++++++{
++++++++++++++++print("GameData.plist+not+found.+Please,+make+sure+it+is+part+of+the+bundle.")
++++++++++++}
++++++++}
++++++++else
++++++++{
++++++++++++print("GameData.plist+already+exits+at+path.")
++++++++++++//+use+this+to+delete+file+from+documents+directory
++++++++++++//fileManager.removeItemAtPath(path,+error:+nil)
++++++++}

++++++++let+resultDictionary+=+NSMutableDictionary(contentsOfFile:+path)
++++++++print("Loaded+GameData.plist+file+is+-->+\(resultDictionary?.description)")
++++++++let+myDict+=+NSDictionary(contentsOfFile:+path)

++++++++if+let+dict+=+myDict+{
++++++++++++//loading+values
++++++++++++bedroomFloorID+=+dict.objectForKey(BedroomFloorKey)!
++++++++++++bedroomWallID+=+dict.objectForKey(BedroomWallKey)!
++++++++++++//...
++++++++}
++++++++else
++++++++{
++++++++++++print("WARNING:+Couldn't+create+dictionary+from+GameData.plist!+Default+values+will+be+used!")
++++++++}

++++}//eom|code-block|syntax|javascript|85759|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

updated swift code of Rebeloper:

<pre><code>let BedroomFloorKey = "BedroomFloor"
let BedroomWallKey = "BedroomWall"
var bedroomFloorID: AnyObject = 101
var bedroomWallID: AnyObject = 101

 func saveGameData()
 {
 let paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true) as NSArray
 let documentsDirectory = paths.objectAtIndex(0) as! NSString
 let path = documentsDirectory.stringByAppendingPathComponent("GameData.plist")
 let dict: NSMutableDictionary = ["XInitializerItem": "DoNotEverChangeMe"]

 //saving values
 dict.setObject(bedroomFloorID, forKey: BedroomFloorKey)
 dict.setObject(bedroomWallID, forKey: BedroomWallKey)
 //...
 //writing to GameData.plist
 dict.writeToFile(path, atomically: false)
 let resultDictionary = NSMutableDictionary(contentsOfFile: path)
 print("Saved GameData.plist file is --&gt; \(resultDictionary?.description)")

 self.loadGameData()

 }//eom


 func loadGameData() {
 // getting path to GameData.plist

 let paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true) as NSArray
 let documentsDirectory = paths[0] as! NSString
 let path = documentsDirectory.stringByAppendingPathComponent("GameData.plist")

// let path = documentsDirectory.stringByAppendingPathComponent("GameData.plist")
 let fileManager = NSFileManager.defaultManager()

 //check if file exists
 if(!fileManager.fileExistsAtPath(path))
 {
 // If it doesn't, copy it from the default file in the Bundle

 if let bundlePath = NSBundle.mainBundle().pathForResource("GameData", ofType: "plist")
 {
 let resultDictionary = NSMutableDictionary(contentsOfFile: bundlePath)
 print("Bundle GameData.plist file is --&gt; \(resultDictionary?.description)")

 do
 {
 try fileManager.copyItemAtPath(bundlePath, toPath: path)
 print("copy")
 }
 catch _
 {
 print("error failed loading data")
 }
 }
 else
 {
 print("GameData.plist not found. Please, make sure it is part of the bundle.")
 }
 }
 else
 {
 print("GameData.plist already exits at path.")
 // use this to delete file from documents directory
 //fileManager.removeItemAtPath(path, error: nil)
 }

 let resultDictionary = NSMutableDictionary(contentsOfFile: path)
 print("Loaded GameData.plist file is --&gt; \(resultDictionary?.description)")
 let myDict = NSDictionary(contentsOfFile: path)

 if let dict = myDict {
 //loading values
 bedroomFloorID = dict.objectForKey(BedroomFloorKey)!
 bedroomWallID = dict.objectForKey(BedroomWallKey)!
 //...
 }
 else
 {
 print("WARNING: Couldn't create dictionary from GameData.plist! Default values will be used!")
 }

 }//eom
</code></pre>

blocks|key|85761|text|struct+Plist+{

enum+PlistError:+ErrorType+{
++++case+FileNotWritten
++++case+FileDoesNotExist
}

let+name:String

var+sourcePath:String?+{
++++guard+let+path+=+NSBundle.mainBundle().pathForResource(name,+ofType:+"plist")+else+{+return+.None+}
++++return+path
}

var+destPath:String?+{
++++guard+sourcePath+!=+.None+else+{+return+.None+}
++++let+dir+=+NSSearchPathForDirectoriesInDomains(.DocumentDirectory,+.UserDomainMask,+true)[0]
++++return+(dir+as+NSString).stringByAppendingPathComponent("\(name).plist")
}

init?(name:String)+{

++++self.name+=+name

++++let+fileManager+=+NSFileManager.defaultManager()

++++guard+let+source+=+sourcePath+else+{+return+nil+}
++++guard+let+destination+=+destPath+else+{+return+nil+}
++++guard+fileManager.fileExistsAtPath(source)+else+{+return+nil+}

++++if+!fileManager.fileExistsAtPath(destination)+{

++++++++do+{
++++++++++++try+fileManager.copyItemAtPath(source,+toPath:+destination)
++++++++}+catch+let+error+as+NSError+{
++++++++++++print("Unable+to+copy+file.+ERROR:+\(error.localizedDescription)")
++++++++++++return+nil
++++++++}
++++}
}


func+getValuesInPlistFile()+->+NSDictionary?{
++++let+fileManager+=+NSFileManager.defaultManager()
++++if+fileManager.fileExistsAtPath(destPath!)+{
++++++++guard+let+dict+=+NSDictionary(contentsOfFile:+destPath!)+else+{+return+.None+}
++++++++return+dict
++++}+else+{
++++++++return+.None
++++}
}

func+getMutablePlistFile()+->+NSMutableDictionary?{
++++let+fileManager+=+NSFileManager.defaultManager()
++++if+fileManager.fileExistsAtPath(destPath!)+{
++++++++guard+let+dict+=+NSMutableDictionary(contentsOfFile:+destPath!)+else+{+return+.None+}
++++++++return+dict
++++}+else+{
++++++++return+.None
++++}
}

func+addValuesToPlistFile(dictionary:NSDictionary)+throws+{
++++let+fileManager+=+NSFileManager.defaultManager()
++++if+fileManager.fileExistsAtPath(destPath!)+{
++++++++if+!dictionary.writeToFile(destPath!,+atomically:+false)+{
++++++++++++print("File+not+written+successfully")
++++++++++++throw+PlistError.FileNotWritten
++++++++}
++++}+else+{
++++++++throw+PlistError.FileDoesNotExist
++++}
}
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|85762|现在，在视图控制器中实现下面的代码。|unstyled|85763|++++++++if+let+plist+=+Plist(name:+"plist+file+name")+{
++++++++let+dict+=+plist.getMutablePlistFile()!
++++++++dict["key"]+=+value

++++++++do+{
++++++++++++try+plist.addValuesToPlistFile(dict)
++++++++}+catch+{
++++++++++++print(error)
++++++++}
++++++++++++print(plist.getValuesInPlistFile())
++++++++}+else+{
+++++++++++print("Unable+to+get+Plist")
++++++++}|85764|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|L|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|I|3|-4|5|F|7|N|8|@]|9|@]|A|$]]]|J|$]]

<pre><code>struct Plist {

enum PlistError: ErrorType {
 case FileNotWritten
 case FileDoesNotExist
}

let name:String

var sourcePath:String? {
 guard let path = NSBundle.mainBundle().pathForResource(name, ofType: "plist") else { return .None }
 return path
}

var destPath:String? {
 guard sourcePath != .None else { return .None }
 let dir = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0]
 return (dir as NSString).stringByAppendingPathComponent("\(name).plist")
}

init?(name:String) {

 self.name = name

 let fileManager = NSFileManager.defaultManager()

 guard let source = sourcePath else { return nil }
 guard let destination = destPath else { return nil }
 guard fileManager.fileExistsAtPath(source) else { return nil }

 if !fileManager.fileExistsAtPath(destination) {

 do {
 try fileManager.copyItemAtPath(source, toPath: destination)
 } catch let error as NSError {
 print("Unable to copy file. ERROR: \(error.localizedDescription)")
 return nil
 }
 }
}


func getValuesInPlistFile() -&gt; NSDictionary?{
 let fileManager = NSFileManager.defaultManager()
 if fileManager.fileExistsAtPath(destPath!) {
 guard let dict = NSDictionary(contentsOfFile: destPath!) else { return .None }
 return dict
 } else {
 return .None
 }
}

func getMutablePlistFile() -&gt; NSMutableDictionary?{
 let fileManager = NSFileManager.defaultManager()
 if fileManager.fileExistsAtPath(destPath!) {
 guard let dict = NSMutableDictionary(contentsOfFile: destPath!) else { return .None }
 return dict
 } else {
 return .None
 }
}

func addValuesToPlistFile(dictionary:NSDictionary) throws {
 let fileManager = NSFileManager.defaultManager()
 if fileManager.fileExistsAtPath(destPath!) {
 if !dictionary.writeToFile(destPath!, atomically: false) {
 print("File not written successfully")
 throw PlistError.FileNotWritten
 }
 } else {
 throw PlistError.FileDoesNotExist
 }
}
}
</code></pre>

Now, implement below in your view controller.

<pre><code> if let plist = Plist(name: "plist file name") {
 let dict = plist.getMutablePlistFile()!
 dict["key"] = value

 do {
 try plist.addValuesToPlistFile(dict)
 } catch {
 print(error)
 }
 print(plist.getValuesInPlistFile())
 } else {
 print("Unable to get Plist")
 }
</code></pre>

blocks|key|85787|text|签入Xcode+10+swift+4.1|type|unstyled|depth|inlineStyleRanges|entityRanges|data|85788|//TODO:+for+wtite+in+.plist+file
++++++++let+docsBaseURL+=+FileManager.default.urls(for:+.documentDirectory,+in:+.userDomainMask).first!
++++++++let+customPlistURL+=+docsBaseURL.appendingPathComponent("custom.plist")
++++++++print(customPlistURL.absoluteString)
++++++++let+dic:[String:Any]+=+["key":"val"]
++++++++//+Swift+Dictionary+To+Data.
++++++++do++{
++++++++let+data+=+try+PropertyListSerialization.data(fromPropertyList:+dic,+format:+PropertyListSerialization.PropertyListFormat.binary,+options:+0)
++++++++++++do+{
++++++++++++++++try+data.write(to:+customPlistURL,+options:+.atomic)
++++++++++++++++print("Successfully+write")
++++++++++++}catch+(let+err){
++++++++++++++++print(err.localizedDescription)
++++++++++++}
++++++++}catch+(let+err){
++++++++++++print(err.localizedDescription)
++++++++}|code-block|syntax|javascript|85789|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Check in Xcode 10 swift 4.1

<pre><code>//TODO: for wtite in .plist file
 let docsBaseURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
 let customPlistURL = docsBaseURL.appendingPathComponent("custom.plist")
 print(customPlistURL.absoluteString)
 let dic:[String:Any] = ["key":"val"]
 // Swift Dictionary To Data.
 do {
 let data = try PropertyListSerialization.data(fromPropertyList: dic, format: PropertyListSerialization.PropertyListFormat.binary, options: 0)
 do {
 try data.write(to: customPlistURL, options: .atomic)
 print("Successfully write")
 }catch (let err){
 print(err.localizedDescription)
 }
 }catch (let err){
 print(err.localizedDescription)
 }
</code></pre>

blocks|key|85797|text|从您的信息属性列表|type|unstyled|depth|inlineStyleRanges|entityRanges|data|85798|钥匙|85799|++Privacy+-+Photo+Library+Additions+Usage+Description|code-block|syntax|javascript|85800|类型|85801|++String|85802|价值|85803|++"Your+App+Name"+would+like+to+access+the+photo+gallery+to+manage+your+profile+picture|85804|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|V|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

From your Information Property List
Key
<pre><code> Privacy - Photo Library Additions Usage Description
</code></pre>
Type
<pre><code> String
</code></pre>
Value
<pre><code> &quot;Your App Name&quot; would like to access the photo gallery to manage your profile picture
</code></pre>

I am trying to save data to a plist file in swift, but the data isn't showing up as it was saved when the plist is read. This is the code I was using.

<pre><code>var documentsDirectory = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as NSString
var path : NSString = documentsDirectory.stringByAppendingPathComponent("data.plist")
var data : NSMutableDictionary = NSMutableDictionary(contentsOfFile: path)
data.setObject(self.object, forKey: "key")
data.writeToFile(path, atomically: true)
</code></pre>

Edit: I've heard that the best way to do this is write to the documents directory, so my question would be how should I write to a file in that directory?

Save Data to .plist File in Swift

Swift

Xcode

我试图将数据保存到plist文件中，但是当plist被读取时，数据并没有显示出来。这是我使用的代码。var documentsDirectory = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as ...

问在Swift中将数据保存到.plist文件
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