Save string to the NSUserDefaults

Question

How to save a string into the NSUserDefaults

User · Answer

In Swift 4 0 3 Xcode 9              set  Data in UserDefaults              UserDefaults standard set userName  forKey   userName     UserDefaults standard synchronize                Get Data in UserDefaults              let userName   UserDefaults standard string forKey   userName     print userName     Gera      userNameTextField text      userName

User · Answer

NSString  valueToSave     someValue     NSUserDefaults standardUserDefaults  setObject valueToSave forKey   preferenceName      NSUserDefaults standardUserDefaults  synchronize     to get it back later  NSString  savedValue     NSUserDefaults standardUserDefaults      stringForKey   preferenceName

User · Answer

FirstView            NSMutableArray  array    -  void viewDidLoad        super viewDidLoad       array     NSMutableArray alloc init       array     NSUserDefaults  standardUserDefaults objectForKey   userlist          NSLog    lu   unsigned long array count       if  array gt 0                for  int i 0  i lt array count  i                          NSDictionary  dict1       Username    array valueForKey   Username   objectAtIndex i    Mobilenumber    array valueForKey   Mobilenumber   objectAtIndex i    Firstname    array valueForKey   Firstname   objectAtIndex i    Lastname    array valueForKey   Lastname   objectAtIndex i    dob    array valueForKey   dob   objectAtIndex i    image    array valueForKey   image   objectAtIndex i                NSLog       dict1               NSArray  array1     NSArray alloc initWithObjects dict1  nil                 NSUserDefaults standardUserDefaults  setObject array1 forKey   UserList                              ImagePicker       -  void imagePickerController  UIImagePickerController   picker         didFinishPickingMediaWithInfo  NSDictionary   info        UIImage  chosenImage   info UIImagePickerControllerEditedImage       self imaGe image   chosenImage        picker dismissViewControllerAnimated YES completion NULL              IBAction submitBton  id sender    NSMutableArray  array2     NSMutableArray alloc initWithArray     NSUserDefaults standardUserDefaults objectForKey             userlist                                      UIImage  ima    imaGe image  NSData  imagedata   UIImageJPEGRepresentation ima 100    NSDictionary  dict        Username   userTxt text   Lastname   lastTxt text   Firstname   firstTxt text   Mobilenumber   mobTxt text   dob   dobTxt text   image  imagedata        array2 addObject dict       NSUserDefaults standardUserDefaults setObject array2       forKey   userlist       NSLog       array2       self performSegueWithIdentifier   second  sender self           IBAction chooseImg  id sender    UIImagePickerController  picker     UIImagePickerController alloc  init   picker delegate   self  picker allowsEditing   YES  picker sourceType   UIImagePickerControllerSourceTypePhotoLibrary   self presentViewController picker animated YES completion NULL           second View           NSMutableArray  arr     -  void viewDidLoad        super viewDidLoad         arr    NSMutableArray alloc init       arr     NSUserDefaults standardUserDefaults objectForKey   userlist        pragma mark- TableView DataSource  - NSInteger numberOfSectionsInTableView  UITableView   tableView       return 1     - NSInteger tableView  UITableView   tableView numberOfRowsInSection  NSInteger section       return arr count     - UITableViewCell   tableView  UITableView   tableView cellForRowAtIndexPath  NSIndexPath   indexPath       static NSString  cellId     tablecell       TableViewCell  cell   tableView dequeueReusableCellWithIdentifier cellId       cell userLbl text    arr valueForKey   username   objectAtIndex indexPath row       cell ageLbl text    arr valueForKey   dob   objectAtIndex indexPath row       cell profileImg image   UIImage imageNamed   arr valueForKey   image   objectAtIndex indexPath row        return cell

User · Answer

update for Swift 3  func setObject value AnyObject  key String        let pref   UserDefaults standard     pref set value  forKey  key      pref synchronize      func getObject key String  - gt  AnyObject       let pref   UserDefaults standard     return pref object forKey  key   as AnyObject

User · Answer

more precisely   - void saveToUserDefaults  NSString  myString       NSUserDefaults  standardUserDefaults    NSUserDefaults standardUserDefaults        if  standardUserDefaults             standardUserDefaults setObject myString forKey   timestamps             standardUserDefaults synchronize

User · Answer

A good practice is also to use a constant for the key to avoid bugs where you do not store and read with the same key  NSString  const TIME STAMPS KEY     TIME STAMPS KEY

User · Answer

Here Swift updated  let userID    quot BOB quot     Declare userDefaults  let defaults   UserDefaults standard defaults setValue userID  forKey   quot userID quot    And get it  let userID   defaults object forKey   quot userID quot

User · Answer

NSUserDefaults  prefs    NSUserDefaults standardUserDefaults       saving an NSString  prefs setObject   TextToSave  forKey   keyToLookupString        saving an NSInteger  prefs setInteger 42 forKey   integerKey        saving a Double  prefs setDouble 3 1415 forKey   doubleKey        saving a Float  prefs setFloat 1 2345678 forKey   floatKey        This is suggested to synch prefs  but is not needed  I didn t put it in my tut   prefs synchronize     Retrieving  NSUserDefaults  prefs    NSUserDefaults standardUserDefaults       getting an NSString NSString  myString    prefs stringForKey   keyToLookupString        getting an NSInteger NSInteger myInt    prefs integerForKey   integerKey        getting an Float float myFloat    prefs floatForKey   floatKey

User · Answer

Here For Swift i create two function which call for save and retrive value for key from Preference  may be this is help full for u      for saving object  static func setObject value AnyObject  key String        let pref   NSUserDefaults standardUserDefaults       pref setObject value  forKey  key      pref synchronize      static func getObject key String  - gt  AnyObject       let pref   NSUserDefaults standardUserDefaults       return pref objectForKey key

User · Answer

Do not forget this statement because otherwise it may not always work    standardUserDefaults synchronize

User · Answer

Something like this   NSUserDefaults  prefs    NSUserDefaults standardUserDefaults       saving an NSString  prefs setObject   TextToSave  forKey   keyToLookupString      Then to retrieve   NSUserDefaults  prefs    NSUserDefaults standardUserDefaults       getting an NSString NSString  myString    prefs stringForKey   keyToLookupString      You should really check out Apple s NSUserDefaults Class Reference and also maybe this tutorial  iPhone Programming Tutorial     Saving Retrieving Data Using NSUserDefaults

User · Answer

In Swift5 and Xcode 10 2    Save UserDefaults standard set true  forKey   Key1     Bool UserDefaults standard set 1  forKey   Key2      Integer UserDefaults standard set  This is my string   forKey   Key3     String UserDefaults standard synchronize      Retrive UserDefaults standard bool forKey   Key1   UserDefaults standard integer forKey   Key2   UserDefaults standard string forKey   Key3      Remove UserDefaults standard removeObject forKey   Key3     Note  Save text data means String  Array  Dictionary etc   in UserDefaults  Don t save images in UserDefaults  it s not recommended Save images in local directory

User · Answer

Here s how to do the same with Swift   var valueToSave    someValue  NSUserDefaults standardUserDefaults   setObject valueToSave  forKey   preferenceName     To get it back later   if let savedValue   NSUserDefaults standardUserDefaults   stringForKey  preferenceName            Do something with savedValue     In Swift 3 0  var valueToSave    someValue  UserDefaults standard set valueToSave  forKey   preferenceName    if let savedValue   UserDefaults standard string forKey   preferenceName

User · Answer

- void saveToUserDefaults  NSString  string to store keys  NSString   key for the String       NSUserDefaults  standardUserDefaults    NSUserDefaults standardUserDefaults        if  standardUserDefaults             standardUserDefaults setObject string to store forKey key for the String            standardUserDefaults synchronize             And call it by    self saveToUserDefaults   string to store      key for the string      Retrieve the string by using   NSString   stored string     NSUserDefaults standardUserDefaults  stringforkey key for the String

User · Answer

NSUserDefaults standardUserDefaults  setValue aString forKey aKey

User · Answer

For saving use this       NSUserDefaults standardUserDefaults setObject   YES  forKey   KTerminated      NSUserDefaults standardUserDefaults synchronize     For Retriveing use this       NSUserDefaults standardUserDefaults stringForKey   KTerminated   isEqualToString   YES

[ios] Save string to the NSUserDefaults?

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