swift - UITableView row won't removed after being deleted -

-

i'm having problem after had deleted tableview row, row won't removed, here code, had follow tutorial online, , delete data model, won't dismiss deleted row unless unwind previous screen , view, why it? :

func tableview(tableview: uitableview, caneditrowatindexpath indexpath: nsindexpath) -> bool {     return true }  func tableview(tableview: uitableview, commiteditingstyle editingstyle: uitableviewcelleditingstyle, forrowatindexpath indexpath: nsindexpath) {      if (editingstyle == uitableviewcelleditingstyle.delete) {          let product = frc.objectatindexpath(indexpath) as! product          let productname = product.name          let message = (mclocalization.sharedinstance.stringforkey("cart_remove_one_item_message",  replacements: ["%s" : productname!]))         let alert = uialertcontroller(title: (mclocalization.sharedinstance.stringforkey("cart_remove_title")), message: message, preferredstyle: uialertcontrollerstyle.alert)          let okaction = uialertaction(title: "ok", style: uialertactionstyle.default, handler: {             (_)in              let managedobject : nsmanagedobject = self.frc.objectatindexpath(indexpath) as! nsmanagedobject             self.moc.deleteobject(managedobject)             self.tableview.reloaddata()              {                 try self.moc.save()               } catch {                 print("failed save.")                 return             }         })          alert.addaction(okaction)         alert.addaction(uialertaction(title: "cancel", style: uialertactionstyle.cancel, handler: nil))         self.presentviewcontroller(alert, animated: false, completion: nil)     }   }

you need remove object array reload tableview after moc.save() successfully.

let managedobject : nsmanagedobject = self.frc.objectatindexpath(indexpath) as! nsmanagedobject self.moc.deleteobject(managedobject) {    try self.moc.save()  } catch {     print("failed save.")     return }

edit: need add in question using nsfetchedresultscontroller, think have set delegate self.frc.delegate = self, add delegate method remove reloaddata there no need now.

func controllerwillchangecontent(controller: nsfetchedresultscontroller) {     tableview.beginupdates() }  func controllerdidchangecontent(controller: nsfetchedresultscontroller) {     tableview.endupdates() }  func controller(controller: nsfetchedresultscontroller, didchangeobject anobject: anyobject, atindexpath indexpath: nsindexpath?, forchangetype type: nsfetchedresultschangetype, newindexpath: nsindexpath?) {     switch type {     case .insert:         tableview.insertrowsatindexpaths([newindexpath!], withrowanimation: .automatic)     case .delete:         tableview.deleterowsatindexpaths([indexpath!], withrowanimation: .automatic)     default: break     } }

fore more detail nsfetchedresultscontroller check tutorials you.


Comments

Post a Comment

Popular posts from this blog

Spring Boot + JPA + Hibernate: Unable to locate persister -

-
i trying work entity inside request method of spring boot application. entity in project , pom.xml has dependencies it. why error message?: org.hibernate.unknownentitytypeexception: unable locate persister: com.ric.bill.model.bs.par package com.ric.web; import java.util.concurrent.atomic.atomiclong; import javax.persistence.entitymanager; import javax.persistence.persistencecontext; import net.sf.ehcache.cachemanager; import net.sf.ehcache.management.cache; import net.sf.ehcache.management.cachestatistics; import org.hibernate.stat.statistics; import org.springframework.beans.factory.annotation.autowired; import org.springframework.boot.autoconfigure.domain.entityscan; import org.springframework.cache.annotation.enablecaching; import org.springframework.transaction.annotation.enabletransactionmanagement; import org.springframework.transaction.annotation.propagation; import org.springframework.transaction.annotation.transactional; import org.springframework.web.bind.annotati
Read more

go - Golang: panic: runtime error: invalid memory address or nil pointer dereference using bufio.Scanner -

-
i implementing go program uses bufio.scanner , bufio.writer have packaged code follows package main import ( "fmt" "player/command" "strings" ) func main() { //enter code here. read input stdin. print output stdout commands.scanner.scan() { //scan new line , send comand variable check command exist or not input := strings.split(strings.trim(commands.scanner.text(), " "), " ") command := input[0] if command == "" { fmt.printf("$ %s:", commands.pwd) continue } if !commands.commands[command] { commands.throwerror("cannot recognize input.") } else { commands.execute(command, input[1:], nil) } fmt.printf("$ %s:", commands.pwd) } } i using init.go file in main package follows package main import ( "flag" "player/sourc
Read more

c - double free or corruption (fasttop) -

-
this code reads null terminated string file (file containing null terminated strings & should provide index wanted string). error: *** error in `./main': double free or corruption (fasttop): 0x090a4a80 *** aborted code: char *tmp_realloc=null; char *sstring=null; int i=1; /*set file pointer point string*/ fseek(fh,index,seek_set); sstring=(char*)malloc(sizeof(char)); if(sstring == null) return null; tmp_realloc=sstring; while( (*(sstring+i-1)=(char)fgetc((file*)fh)) != 0x0 ) { /*reallocate more memory*/ tmp_realloc=(char*)realloc((char*)sstring,++i); /*if not same address copy old new & set old point new*/ if(tmp_realloc != sstring){ strcpy((char*)tmp_realloc,(char*)sstring); free(sstring); sstring=tmp_realloc; } } could tell me pointer causing issue (& reason) ? remove part /*if not same address copy old new & set old point new*/ if(tmp_realloc != sstring){ strc
Read more