swift - Use of Unresolved Identifier Error Code -

-

i wondering why keep getting error message, use of unresolved identifier 'changeinpercent'. not sure why keep getting error message help, appreciate it.

here code.

import uikit  class stockstableviewcontroller: uiviewcontroller, uitableviewdatasource, uitableviewdelegate {  //1 private var stocks: [(string,double)] = [("aapl",+1.5),("fb",+2.33),("goog",-4.3)] @iboutlet weak var tableview: uitableview!   override func viewdidload() {     super.viewdidload()     //2     nsnotificationcenter.defaultcenter().addobserver(self, selector: "stocksupdated:", name: knotificationstocksupdated, object: nil)     self.updatestocks() }  override func didreceivememorywarning() {     super.didreceivememorywarning() }  //uitableviewdatasource func tableview(tableview: uitableview, numberofrowsinsection section: int) -> int {      return stocks.count }  func tableview(tableview: uitableview, cellforrowatindexpath indexpath: nsindexpath) -> uitableviewcell {      let cell:uitableviewcell = uitableviewcell(style: uitableviewcellstyle.value1, reuseidentifier: "cellid")     cell.textlabel!.text = stocks[indexpath.row].0 //position 0 of tuple: symbol "aapl"     cell.detailtextlabel!.text = "\(stocks[indexpath.row].1)" + "%" //position 1 of tuple: value "1.5" string     return cell }  //uitableviewdelegate func tableview(tableview: uitableview, didselectrowatindexpath indexpath: nsindexpath) {  }  //customize cell func tableview(tableview: uitableview, willdisplaycell cell: uitableviewcell, forrowatindexpath indexpath: nsindexpath) {     switch stocks[indexpath.row].1 {     case let x x < 0.0:         cell.backgroundcolor = uicolor(red: 255.0/255.0, green: 59.0/255.0, blue: 48.0/255.0, alpha: 1.0)     case let x x > 0.0:         cell.backgroundcolor = uicolor(red: 76.0/255.0, green: 217.0/255.0, blue: 100.0/255.0, alpha: 1.0)     case _:         cell.backgroundcolor = uicolor(red: 44.0/255.0, green: 186.0/255.0, blue: 231.0/255.0, alpha: 1.0)     }      cell.textlabel!.textcolor = uicolor.whitecolor()     cell.detailtextlabel!.textcolor = uicolor.whitecolor()     cell.textlabel!.font = uifont(name: "helveticaneue-condensedbold", size: 48)     cell.detailtextlabel!.font = uifont(name: "helveticaneue-condensedbold", size: 48)     cell.textlabel!.shadowcolor = uicolor(red: 0, green: 0, blue: 0, alpha: 0.25)     cell.textlabel!.shadowoffset = cgsize(width: 0, height: 1)     cell.detailtextlabel!.shadowcolor = uicolor(red: 0, green: 0, blue: 0, alpha: 0.25)     cell.detailtextlabel!.shadowoffset = cgsize(width: 0, height: 1) }  //customize height of cell func tableview(tableview: uitableview, heightforrowatindexpath indexpath: nsindexpath) -> cgfloat {     return 120 }  //stock updates //3 func updatestocks() {     let stockmanager:stockmanagersingleton = stockmanagersingleton.sharedinstance     stockmanager.updatelistofsymbols(stocks)      //repeat method after 15 secs. (for simplicity of tutorial not cancelling never)     dispatch_after(         dispatch_time(             dispatch_time_now,             int64(15 * double(nsec_per_sec))         ),         dispatch_get_main_queue(),         {             self.updatestocks()         }     ) }  //4 func stocksupdated(notification: nsnotification) {     let values = (notification.userinfo as! dictionary<string,nsarray>)     let stocksreceived:nsarray = values[knotificationstocksupdated]!     stocks.removeall(keepcapacity: false)     quote in stocksreceived {         let quotedict:nsdictionary = quote as! nsdictionary         var changeinpercentstring = quotedict["changeinpercent"] as! string         let changeinpercentstringclean: nsstring = (changeinpercentstring nsstring).substringtoindex(changeinpercent(changeinpercentstring)-1)         stocks.append(quotedict["symbol"] as! string,changeinpercentstringclean.doublevalue)     }     tableview.reloaddata()     nslog("symbols values updated :)") } }

the line of code error is,

var changeinpercentstring = quotedict["changeinpercent"] as! string 

var changeinpercentstring = quotedict["changeinpercent"] as! string let changeinpercentstringclean: nsstring = (changeinpercentstring nsstring).substringtoindex((changeinpercentstring nsstring).length-1)

Comments

Post a Comment

Popular posts from this blog

c# - How Configure Devart dotConnect for SQLite Code First? -

-
can configure following sample code ? when run following code, error : no entity framework provider found ado.net provider invariant name 'devart.data.sqlite' setting in machine.config <system.data> <dbproviderfactories> <add name="dotconnect sqlite" invariant="devart.data.sqlite" description="devart dotconnect sqlite" type="devart.data.sqlite.sqliteproviderfactory, devart.data.sqlite, version=4.6.287.0, culture=neutral, publickeytoken=09af7300eec23701" /> </dbproviderfactories> </system.data> after add below block code in app.config <?xml version="1.0"?> <configuration>   <configsections> <!-- more information on entity framework configuration, visit http://go.microsoft.com/fwlink/?linkid=237468 --> <section name="entityframework" type="system.data.entity.internal.configfile.entityframeworksection, entit...
Read more

java - Copying object fields -

-
what best way of copying classes when need have 2 independent variables? have simple class: public class myclass { boolean = false; string b= "not empty"; } do need make method : assign(myclass data ) { a= data.a; b= data.b; } is there automatic method copy (duplicate) objects in java? do need make method : pretty close. instead of making method, should make constructor. such constructors called copy constructor , , create them this: myclass(myclass data) { = data.a; b = data.b; } and create copy of instance, use constructor this: myclass obj1 = new myclass(); myclass obj2 = new myclass(obj1); copy constructor can tedious : using copy constructor create deep-copy can tedious, when class has mutable fields. in case, assignment create copy of reference, , not object itself. have create copy of fields (if want deep copy). can go recursive. a better way create deep copy serialize , deserialize object. why not use clone()? ...
Read more

c++ - Clear the memory after returning a vector in a function -

-
i have function processes , stores lot of data in , returns results vector of class. amount of data stored in function tremendous , want clear storage memory of function after finished job. necessary (does function automatically clear memory) or should clear memory function? update: vector<customers> process(char* const *filename, vector<int> id) { vector<customers> list_of_customers; (perform actions) return list_of_customers; } variables defined locally within function automatically released @ end of function scope. destructors objects called, should free memory allocated objects (if objects coded correctly). example of such object std::vector . anything you've allocated new must have corresponding delete release storage. try avoid doing own allocation , use raii instead, i.e. containers or smart pointers.
Read more