How to write data in plist?
I don't know if I understand your question, but if you want to write into a .plist within your .app bundle you are probably doing something wrong. If you want to store preferences, you should consider using NSUserDefaults.
If you really want to modify a bundled .plist - here is some code:
NSString *plistPath = nil;
NSFileManager *manager = [NSFileManager defaultManager];
if (plistPath = [[[NSBundle mainBundle] bundlePath] stringByAppendingPathComponent:@"Contents/Info.plist"])
{
if ([manager isWritableFileAtPath:plistPath])
{
NSMutableDictionary *infoDict = [NSMutableDictionary dictionaryWithContentsOfFile:plistPath];
[infoDict setObject:[NSNumber numberWithBool:hidden] forKey:@"LSUIElement"];
[infoDict writeToFile:plistPath atomically:NO];
[manager changeFileAttributes:[NSDictionary dictionaryWithObject:[NSDate date] forKey:NSFileModificationDate] atPath: [[NSBundle mainBundle] bundlePath]];
}
}
Update:
Nate Flink pointed out that some of the NSFileManager methods used above are deprecated.
He posted an answer with the replacement methods below:
https://stackoverflow.com/a/12428472/100848
Write and Read a plist in swift with simple data
Update for Swift 4
I have created SwiftyPlistManager. Take a look at it on GiHub and follow these video instructions:
https://www.youtube.com/playlist?list=PL_csAAO9PQ8bKg79CX5PEfn886SMMDj3j
Update for Swift 3.1
let BedroomFloorKey = "BedroomFloor"
let BedroomWallKey = "BedroomWall"
var bedroomFloorID: Any = 101
var bedroomWallID: Any = 101
func loadGameData() {
// getting path to GameData.plist
let paths = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true) as NSArray
let documentsDirectory = paths.object(at: 0) as! NSString
let path = documentsDirectory.appendingPathComponent("GameData.plist")
let fileManager = FileManager.default
//check if file exists
if !fileManager.fileExists(atPath: path) {
guard let bundlePath = Bundle.main.path(forResource: "GameData", ofType: "plist") else { return }
do {
try fileManager.copyItem(atPath: bundlePath, toPath: path)
} catch let error as NSError {
print("Unable to copy file. ERROR: \(error.localizedDescription)")
}
}
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.object(forKey: BedroomFloorKey)!
bedroomWallID = dict.object(forKey: BedroomWallKey)!
//...
} else {
print("WARNING: Couldn't create dictionary from GameData.plist! Default values will be used!")
}
}
func saveGameData() {
let paths = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true) as NSArray
let documentsDirectory = paths.object(at: 0) as! NSString
let path = documentsDirectory.appendingPathComponent("GameData.plist")
let dict: NSMutableDictionary = ["XInitializerItem": "DoNotEverChangeMe"]
//saving values
dict.setObject(bedroomFloorID, forKey: BedroomFloorKey as NSCopying)
dict.setObject(bedroomWallID, forKey: BedroomWallKey as NSCopying)
//...
//writing to GameData.plist
dict.write(toFile: path, atomically: false)
let resultDictionary = NSMutableDictionary(contentsOfFile: path)
print("Saved GameData.plist file is --> \(resultDictionary?.description ?? "")")
}
Here's what I use to read/write a plist file in swift:
let BedroomFloorKey = "BedroomFloor"
let BedroomWallKey = "BedroomWall"
var bedroomFloorID: AnyObject = 101
var bedroomWallID: AnyObject = 101
func loadGameData() {
// getting path to GameData.plist
let paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true) as NSArray
let documentsDirectory = paths[0] as String
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)
println("Bundle GameData.plist file is --> \(resultDictionary?.description)")
fileManager.copyItemAtPath(bundlePath, toPath: path, error: nil)
println("copy")
} else {
println("GameData.plist not found. Please, make sure it is part of the bundle.")
}
} else {
println("GameData.plist already exits at path.")
// use this to delete file from documents directory
//fileManager.removeItemAtPath(path, error: nil)
}
let resultDictionary = NSMutableDictionary(contentsOfFile: path)
println("Loaded GameData.plist file is --> \(resultDictionary?.description)")
var myDict = NSDictionary(contentsOfFile: path)
if let dict = myDict {
//loading values
bedroomFloorID = dict.objectForKey(BedroomFloorKey)!
bedroomWallID = dict.objectForKey(BedroomWallKey)!
//...
} else {
println("WARNING: Couldn't create dictionary from GameData.plist! Default values will be used!")
}
}
func saveGameData() {
let paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true) as NSArray
let documentsDirectory = paths.objectAtIndex(0) as NSString
let path = documentsDirectory.stringByAppendingPathComponent("GameData.plist")
var 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)
println("Saved GameData.plist file is --> \(resultDictionary?.description)")
}
The plist file is this:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>BedroomFloor</key>
<integer>101</integer>
<key>BedroomWall</key>
<integer>101</integer>
<key>XInitializerItem</key>
<string>DoNotEverChangeMe</string>
</dict>
</plist>
How to write a data in plist?
You are trying to write the file to your application bundle, which is not possible. Save the file to the Documents folder instead.
NSString *path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
path = [path stringByAppendingPathComponent:@"drinks.plist"];
The pathForResource method can only be used for reading the resources that you added to your project in Xcode.
Here's what you typically do when you want to modify a plist in your app:
1. Copy the drinks.plist from your application bundle to the app's Documents folder on first launch (using NSFileManager).
2. Only use the file in the Documents folder when reading/writing.
UPDATE
This is how you would initialize the drinkArray property:
NSString *destPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
destPath = [destPath stringByAppendingPathComponent:@"drinks.plist"];
// If the file doesn't exist in the Documents Folder, copy it.
NSFileManager *fileManager = [NSFileManager defaultManager];
if (![fileManager fileExistsAtPath:destPath]) {
NSString *sourcePath = [[NSBundle mainBundle] pathForResource:@"drinks" ofType:@"plist"];
[fileManager copyItemAtPath:sourcePath toPath:destPath error:nil];
}
// Load the Property List.
drinkArray = [[NSArray alloc] initWithContentsOfFile:destPath];
Save Data to .plist File in Swift
Apparently the file is not in a writable location, so I created it in the documents directory.
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)
Then, it has to be read from the documents directory.
var paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as String
var path = paths.stringByAppendingPathComponent("data.plist")
let save = NSDictionary(contentsOfFile: path)
How can i save, retrieve, delete & update my data in Plist file in ios?
I am going through with screenshot and step by step. Please follow this and you will get your answer.
First you have to create Property List through your Xcode.
Step:1
Step:2
Step:3
Save data on your save button action :
// Take 3 array for save the data .....
-(IBAction)save_Action:(id)sender
{
NSArray *paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsPath = [paths objectAtIndex:0];
NSString *plistPath = [documentsPath stringByAppendingPathComponent:@"manuallyData.plist"];
[self.nameArr addObject:self.nameField.text];
[self.countryArr addObject:self.countryField.text];
[self.imageArr addObject:@"image.png"];
NSDictionary *plistDict = [[NSDictionary alloc] initWithObjects: [NSArray arrayWithObjects: self.nameArr, self.countryArr, self.imageArr, nil] forKeys:[NSArray arrayWithObjects: @"Name", @"Country",@"Image", nil]];
NSError *error = nil;
NSData *plistData = [NSPropertyListSerialization dataFromPropertyList:plistDict format:NSPropertyListXMLFormat_v1_0 errorDescription:&error];
if(plistData)
{
[plistData writeToFile:plistPath atomically:YES];
alertLbl.text = @"Data saved sucessfully";
}
else
{
alertLbl.text = @"Data not saved";
}
}
// Data is saved in your plist and plist is saved in DocumentDirectory
Step:4
Retrieve Data from plist File:
NSArray *paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsPath = [paths objectAtIndex:0];
NSString *plistPath = [documentsPath stringByAppendingPathComponent:@"manuallyData.plist"];
if (![[NSFileManager defaultManager] fileExistsAtPath:plistPath])
{
plistPath = [[NSBundle mainBundle] pathForResource:@"manuallyData" ofType:@"plist"];
}
NSDictionary *dict = [[NSDictionary alloc] initWithContentsOfFile:plistPath];
self.nameArr = [dict objectForKey:@"Name"];
self.countryArr = [dict objectForKey:@"Country"];
Step:5
Remove data from plist file:
NSArray *paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsPath = [paths objectAtIndex:0];
NSString *plistPath = [documentsPath stringByAppendingPathComponent:@"manuallyData.plist"];
NSMutableDictionary *dictionary = [NSMutableDictionary dictionaryWithContentsOfFile:(NSString *)plistPath];
self.nameArr = [dictionary objectForKey:@"Name"];
self.countryArr = [dictionary objectForKey:@"Country"];
[self.nameArr removeObjectAtIndex:indexPath.row];
[self.countryArr removeObjectAtIndex:indexPath.row];
[dictionary writeToFile:plistPath atomically:YES];
Step:6
Update your data on Update click Action:
NSArray *paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsPath = [paths objectAtIndex:0];
NSString *plistPath = [documentsPath stringByAppendingPathComponent:@"manuallyData.plist"];
if (![[NSFileManager defaultManager] fileExistsAtPath:plistPath])
{
plistPath = [[NSBundle mainBundle] pathForResource:@"manuallyData" ofType:@"plist"];
}
self.plistDic = [[NSDictionary alloc] initWithContentsOfFile:plistPath];
[[self.plistDic objectForKey:@"Name"] removeObjectAtIndex:self.indexPath];
[[self.plistDic objectForKey:@"Country"] removeObjectAtIndex:self.indexPath];
[[self.plistDic objectForKey:@"Image"] removeObjectAtIndex:self.indexPath];
[[self.plistDic objectForKey:@"Name"] insertObject:nameField.text atIndex:self.indexPath];
[[self.plistDic objectForKey:@"Country"] insertObject:countryField.text atIndex:self.indexPath];
[[self.plistDic objectForKey:@"Image"] insertObject:@"dhoni.jpg" atIndex:self.indexPath];
[self.plistDic writeToFile:plistPath atomically:YES];
Save data to .plist file in Swift 3
you can try this code:
class SavedTracks: NSObject,NSCoding {
var name: String
var location: String
required init(name:String="", location:String="") {
self.name = name
self.location = location
}
required init(coder decoder: NSCoder) {
self.name = decoder.decodeObject(forKey: "Name") as? String ?? ""
self.location = decoder.decodeObject(forKey: "location") as? String ?? ""
}
func encode(with coder: NSCoder) {
coder.encode(name, forKey:"Name")
coder.encode(location, forKey:"location")
}
}
class DataModel: NSObject {
var saveTrack = [SavedTracks]()
override init(){
super.init()
print("document file path:\(documentsDirectory())")
print("Data file path:\(dataFilePath())")
}
//save data
func saveData() {
let data = NSMutableData()
let archiver = NSKeyedArchiver(forWritingWith: data)
archiver.encode(saveTrack, forKey: "userList")
archiver.finishEncoding()
data.write(toFile: dataFilePath(), atomically: true)
}
//read data
func loadData() {
let path = self.dataFilePath()
let defaultManager = FileManager()
if defaultManager.fileExists(atPath: path) {
let url = URL(fileURLWithPath: path)
let data = try! Data(contentsOf: url)
let unarchiver = NSKeyedUnarchiver(forReadingWith: data)
saveTrack = unarchiver.decodeObject(forKey: "userList") as! Array
unarchiver.finishDecoding()
}
}
func documentsDirectory()->String {
let paths = NSSearchPathForDirectoriesInDomains(.documentDirectory,
.userDomainMask, true)
let documentsDirectory = paths.first!
return documentsDirectory
}
func dataFilePath ()->String{
return self.documentsDirectory().appendingFormat("/userList.plist")
}
}
class ViewController: UIViewController {
var dataModel = DataModel()
override func viewDidLoad() {
super.viewDidLoad()
onCreateData()
}
//create data
func onCreateData(){
dataModel.saveTrack.append(SavedTracks(name: "jack", location: "xxx"))
dataModel.saveTrack.append(SavedTracks(name: "tom", location: "yyyy"))
dataModel.saveTrack.append(SavedTracks(name: "rose", location: "zzz"))
}
@IBAction func saveData(_ sender: UIButton) {
dataModel.saveData()
print("succeed")
}
@IBAction func printData(_ sender: UIButton) {
dataModel.loadData()
print("succeed!", dataModel.saveTrack)
}
}
Updating and saving data in plist
The easiest way to create a dictionary from a plist is to use the method dictionaryWithContentsOfFile:,
For example, to load a plist from your resources:
NSString *filePath = [[NSBundle mainBundle] pathForResource:@"playerData" ofType:@"plist"];
NSMutableDictionary *plistdict = [NSMutableDictionary dictionaryWithContentsOfFile:filePath];
Writing a plistdict is equally simple:
[plistdict writeToFile:filePath atomically:YES];
Note that you can't write into your app's resources, so you'll have to create a different path, e.g. in your Documents directory for your plist.
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *basePath = ([paths count] > 0) ? [paths objectAtIndex:0] : nil;
NSString *docfilePath = [basePath stringByAppendingPathComponent:@"playerData.plist"];
[plistdict writeToFile:docfilePath atomically:YES];
Now retrieve data from plist again.
NSMutableDictionary *plistdict = [NSMutableDictionary dictionaryWithContentsOfFile:docfilePath];
Add your content in plistDict and write it again.
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