iOS development-Data Persistence Swift Chapter &settingbundle

Settingbundle

1 Import UIKit2 3 classViewcontroller:uiviewcontroller {4     5var Userdefault =nsuserdefaults.standarduserdefaults ()6     7@IBOutlet weak var textfield:uitextfield!8     9 @IBAction func btnsave (Sender:uibutton) {Ten updateuserdefaults () One     } A      - @IBAction func btnLoad (Sender:uibutton) { -var text = Userdefault.stringforkey ("TextField") theTextfield.text =text -     } -      -     Overridefunc viewdidload () { + super.viewdidload () -          +         /** A To set up an app: at Create a new file: The setting bundle in resource is opened directly inside the settings after it-----run. Pull it to the end, long enough to see -         */ -         /** - Okay, here's an explanation for the Settings.bundle: -          - in the Settings.bundle, En.iproj is a multi-lingual, temporary regardless. Our main concern is the Root.plist file. This file determines how the data we store is displayed in the Settings menu, and it has 7 types: in          - Group--group. The key is Psgroupspecifier, and the title of the preference logical group.  to text field--textbox. The key is Pstextfieldspecifier, an editable text string.  + title--caption. The key is Pstitlevaluespecifier, a read-only text string.  - Toggle Switch--switches. Key is pstoggleswitchspecifier, switch button.  the Slide--slider. The key is Pssliderspecifier, and the value is in a specific range of sliders.  * multivalue-Multi-value. The key is Psmultivaluespecifier, drop-down list.  $ Child Pane--sub-pane. The key is Pschildpanespecifier, child preference page. Panax Notoginseng          - some types of specific property descriptions: the          + Text Field A          the text Field is secure--whether it is a secure text. If set to Yes, the content appears as a dot symbol.  +          - autocapitalization Style--automatic capitalization. There are four values: none (None), sentences (the first letter of the sentence), Words (capitalize the first letter of the word), all characters (capitalization of all letters).  $          $ autocorrection Style-automatic correction of spelling, if turned on, you enter a non-existent word, the system will draw the red line hint. There are three values: default, no AutoCorrection (not automatically corrected), AutoCorrection (auto correct).  -          - Keyboard Type--keyboard style. There are five values: Alphabet (alphabet, default), Numbers and punctuation (numbers and punctuation), number Pad (digital panel), URL (more than Alphabet. com and other domain name suffixes), Email Address ( than Alphabet more than the @ match).  the          - Toggle SwitchWuyi          the value for on-the string value that is obtained when the switch is set to ON.  -          Wu value for off-the string value that is obtained when the switch is set to OFF.  -          About Slider $          - Minimum Value--minimum, number type.  -          - Maximum Value--Maximum, number type.  A          + min Value Image Filename--the picture at the end of the minimum.  the          - Max value Image Filename--the picture at the end of the maximum.  $          the P.S. The image size must be 21*21 and placed in the Settings.bundle package (display the package contents in the Finder and paste).  the          the multivalue the          - Values -a collection of value.  in          the titles-a collection of titles, corresponding to the value one by one.  the          About Child Pane the          the filename--The file name of the child plist.  the The Item0 here is very important, the type of ITEM0 is group, corresponds to a grouping table type, and the following item is in this grouping table until the next group is encountered. (That is, a group in figure two, you need to add the next group will be joined group type) +          - in our example: (Set a group, the first entry is the input name of the edit box, the second item is the switch variable of the yes/no, the third is the slide of the slider) the         Bayi Item0: Key setting Type:group, display title: Group.  the          the Item1: Key Settings Type:text Field, Title:name, identifier:name_preference, set Identifier to find data by Objectforkey.  -         */ -          the loaddefaults () the          the getuserdefaults () the          -     } the      the     //Load Default program-related application settings the func loaddefaults () {94         //setting Bundle thevar settingbundle = Nsbundle.mainbundle (). Pathforresource ("Settings", OfType:"Bundle") the         ifSettingbundle = =Nil { the             return98         } About          -         //Root101var root = Nsdictionary (contentsoffile:settingbundle!. stringByAppendingPathComponent ("root.plist"))102         //get a value in a dictionary103var prefrences:anyobject? = root?. Objectforkey ("preferencespecifiers") as? Array<nsdictionary>104         //put the dictionary contents of the array into a dictionary package thevar defaultstoregister = nsmutabledictionary (capacity:root!. Count)106         107          forPrefrenceinchprefrences {//' Anyobject? ' dose not having a member named ' Generator '108var key = Prefrence.objectforkey ("Key") asString?109             ifKey! =Nil { theDefaultstoregister.setvalue (Prefrences.objectforkey ("DefaultValue"), Forkey:key)111             } the         }113Nsuserdefaults.standarduserdefaults (). Registerdefaults (Defaultstoregister as[Nsobject:anyobject]) the     } the  the     Overridefunc didreceivememorywarning () {117 super.didreceivememorywarning ()118         //Dispose of any resources the can be recreated.119     } - 121     //Read122 func getuserdefaults () {123var defaults =nsuserdefaults.standarduserdefaults ()124var title = Defaults.objectforkey ("name_preference") as!String theTextfield.text =title126     }127      -     //Change system Settings129 func updateuserdefaults () { thevar defaults =nsuserdefaults.standarduserdefaults ()131Defaults.setbool (false, Forkey:"enabled_preference") the defaults.synchronize ()133     }134}

iOS development-Data Persistence Swift Chapter &settingbundle