ios - Restricting text input to only alpha characters -

-

i have seen multiple approaches cannot work.

i trying restrict text field allow alpha characters entered it. i.e. abcdefabcdef (but of them).

here existing method:

-(bool)textfield:(uitextfield *)textfield shouldchangecharactersinrange:(nsrange)range replacementstring:(nsstring *)string {      // check space/delete     if (string.length <=0 ) {         if ([self.wordarray lastobject]) {             [self.wordarray removeobjectsinrange:range];             [self.tilecollectionview reloaddata];             return yes;          }     }      // check make sure word not above 16 characters, should enough right?     if (textfield.text.length >= 16 ) {         nslog(@"wooo slow down text above 16");         return no;     } else {             [self.wordarray addobject:string];             [self.tilecollectionview reloaddata];             return yes;     }  }

at present check space , remove last entry array. if letter accepted add letter object array, else. logic alpha check should take account, if letter 'legal' should add array , reload collection view.

well, 1 way create own character set compare against. can take advantage of nsstring's stringbytrimmingcharactersinset: , nscharacterset's invertedset property remove characters set don't match characters specify. then, if final string matches input string, didn't contain illegal characters.

nscharacterset *mycharset = [nscharacterset charactersetwithcharactersinstring:@"abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"];  nsstring *input = @"a";  nsstring *output = [input stringbytrimmingcharactersinset:[mycharset invertedset]];  bool isvalid = [input isequaltostring:output];  nslog(@"%d",isvalid);

Comments

Post a Comment

Popular posts from this blog

java - Run a .jar on Heroku -

-
i trying run .jar file on heroku, , can't find instructions anywhere on how this. have read wants me compile uploading heroku. possible, , if is, how this? if helps, trying run minecraft craftbukkit server, , don't have pom.xml file yet. you didn't provide details i'll try give , people reaches question way it. first of all, create heroku account , create heroku application (assumed have done that). second, need generate application jar , upload heroku. so, open terminal , install heroku cli (assuming unix terminal): $ sudo npm install -g heroku-cli you need have npm , nodejs installed, can check link: https://www.digitalocean.com/community/tutorials/how-to-install-node-js-on-ubuntu-16-04 once done that, can use npm update node version acceptable heroku-cli: $ sudo npm install -g n $ sudo n 7.10.0 and run: $ sudo npm install -g heroku-cli in order deploy jars, need install deploy plugin: $ sudo heroku plugins:install heroku-cli-deploy ...
Read more

java - Jtable duplicate Rows -

-
Image
when add new rows in jtable duplicate rows many times this method update jtable public final void tableaucomande(){ ((defaulttablemodel)tabcommande.getmodel()).getdatavector().clear(); session s=hibernateutil.getsessionfactory().opensession(); criteria cr1= s.createcriteria(commande.class); list <commande> lcs=cr1.list() ; criteria cr2= s.createcriteria(lignecommande.class); list <lignecommande> lck=cr2.list() ; if(lcs.size()!=0 && lck.size()!=0) { (commande lc:lcs) { for(lignecommande lig:lck){ ((defaulttablemodel)tabcommande.getmodel()).addrow(new object[]{ lc.getid_cmd(),lc.getnumcmd(),lc.getdate_cmd(),lc.getclient().getnomprenom(), lig.getproduit().getlib_prd(),lig.getquantite(),lig.getproduit().getid_prd() }); } } // tabcommande.setrowselectioninterval(tabcommande.getrowcount()-1,tabcommande.getrowcount()-1); } } this code add add data rows displaye...
Read more

validation - How to pass paramaters like unix into windows batch file -

-
i need pass various parameters .cmd file unix format file.cmd -configuration=value -source=value -flag but, try this: startlocal @echo off cls setlocal set cmdline=%* set configuration= set source= set badargs= set validation= goto main :splitargs echo splitargs(%*) if "%*" neq "" ( /f "tokens=1,2,* delims== " %%i in ("%*") call :assignkeyvalue %%i %%j & call :splitargs %%k ) goto :eof :assignkeyvalue echo assignkeyvalue(%1, %2) if /i %1==-configuration ( set configuration=%2 ) else if /i %1==-source ( set source=%2 ) else ( rem append unrecognised [key,value] badargs echo unknown key %1 set badargs=%badargs%[%1, %2] ) goto :eof :validate echo validating set validation=fail if defined configuration ( echo -configuration ok if defined source ( echo -source ok if not defined badargs ( set validation=success ) ) ) goto :eof :main cl...
Read more