ios - Toggle visibility of UIBarButton -


i have created application has view, tableview , text view, have setup application in way when user click on button log in view takes them tableview , clicking on cell in table view takes them textview. have used single xib these. works fine. when navigate table view uibarbutton has 3 button, view(left), table view(right) , clear button(right) , when click on cell in table view goes text view , 3 button still there. require when tableview appears button log should hidden , other 2 should visible , when on textview, main , log should visible , clear button should hidden. there way achieve this?? these codes uibarbuttons:

uibarbuttonitem *clearhistory=[[uibarbuttonitem alloc]initwithtitle:@"clear history" style:uibarbuttonitemstylebordered target:self action:@selector(cleartable)];      uibarbuttonitem *btnback=[[uibarbuttonitem alloc]initwithtitle:@"back" style:uibarbuttonitemstylebordered target:self action:@selector(goback)];     self.navigationitem.leftbarbuttonitem=btnback;      uibarbuttonitem *btnbacklog=[[uibarbuttonitem alloc]initwithtitle:@"back log" style:uibarbuttonitemstylebordered target:self action:@selector(gobacklog)];      self.navigationitem.rightbarbuttonitems=[nsarray arraywithobjects:clearhistory,btnbacklog, nil];   - (void)goback {     self.tablelogview.hidden = yes;     self.navigationcontroller.navigationbarhidden=yes;     self.viewlogtoolbar.hidden=no;     self.extendedview.hidden = yes; }  - (void)gobacklog {     self.tablelogview.hidden = no;     self.navigationcontroller.navigationbarhidden=no;     self.viewlogtoolbar.hidden=yes;     self.extendedview.hidden = yes; }  -(void)cleartable {     if([tabledata count])     {     uialertview *message= [[uialertview alloc] initwithtitle:@"delete history" message:@"are sure?" delegate:self cancelbuttontitle:@"cancel" otherbuttontitles:@"delete", nil];         [message show];     }     else     {         uialertview *message= [[uialertview alloc] initwithtitle:@"message" message:@"no history" delegate:self cancelbuttontitle:@"ok" otherbuttontitles:nil];         [message show];     }   }

modify code this: doesn't hide achieves exact same function. hope u expecting.

self.navigationcontroller.navigationbarhidden=yes;    uibarbuttonitem *clearhistory=[[uibarbuttonitem alloc]initwithtitle:@"clear" style:uibarbuttonitemstylebordered target:self action:@selector(cleartable)];    self.navigationitem.rightbarbuttonitem=clearhistory;     uibarbuttonitem *btnback=[[uibarbuttonitem alloc]initwithtitle:@"back" style:uibarbuttonitemstylebordered target:self action:@selector(goback)];    self.navigationitem.leftbarbuttonitem=btnback;    - (void)goback {    self.tablelogview.hidden = yes;    self.navigationcontroller.navigationbarhidden=yes;    self.viewlogtoolbar.hidden=no;    self.extendedview.hidden = yes;  }  - (void)gobacklog {    self.tablelogview.hidden = no;    self.navigationcontroller.navigationbarhidden=no;    self.viewlogtoolbar.hidden=yes;    self.extendedview.hidden = yes;     [self.navigationitem.rightbarbuttonitem settitle:@"clear" ];    [self.navigationitem.rightbarbuttonitem setaction:@selector(cleartable)]; }

put code inside function u navigate tableview textview

[self.navigationitem.rightbarbuttonitem settitle:@"back log" ]; [self.navigationitem.rightbarbuttonitem setaction:@selector(gobacklog)];

if still want keep 2 right buttons in array thing u can toggle enable option between 2 buttons like

uibarbuttonitem *ubi= [self.navigationitem.rightbarbuttonitems objectatindex:0];  ubi.enabled=no/yes;

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