ios - how to stop view disappearing when navigation controller left bar button pressed -

-

i rookie ios .in child view controller made modification in data. inserted done button store data , pop view controller navigation controller stack. if press navigation controller button automatically goes without saving data. if made modification in data , pressed button need show alert "modifications made sure want go back". if user press cancel button in alert view need stop view disappearing , still stand on same view controller.if have answer please me.

i think way it

    - (void)viewdidload{         [super viewdidload];         [self.navigationitem setleftbarbuttonitem:nil];         [self.navigationitem sethidesbackbutton:yes];      uibutton *mybutton = [[uibutton alloc] initwithframe:cgrectmake(0, 0, 100, 44)];     [mybutton setimage:[uiimage imagenamed:@"back.png"] forstate:uicontrolstatenormal];     //back.png = image name     [mybutton settitle:@"back" forstate:uicontrolstatenormal];     [mybutton settitlecolor:[uicolor blackcolor] forstate:uicontrolstatenormal];     [mybutton addtarget:self action:@selector(backbuttontapped:) forcontrolevents:uicontroleventtouchupinside];     uibarbuttonitem *custombackbutton = [[uibarbuttonitem alloc] initwithcustomview:mybutton];     [self.navigationitem setleftbarbuttonitem:custombackbutton];      }      - (void)backbuttontapped:(id)sender{         uialertview *alert = [[uialertview alloc] initwithtitle:@"message" message:@"modifications made sure want go back" delegate:self cancelbuttontitle:@"go back" otherbuttontitles:@"stay here", nil];          [alert show];     }      - (void)alertview:(uialertview *)alertview     clickedbuttonatindex:(nsinteger)buttonindex{         if (buttonindex == [alertview cancelbuttonindex]){             [self.navigationcontroller popviewcontrolleranimated:yes];         }else{             //stay on page ,         }     }

don't forget add <uialertviewdelegate>


Comments

Post a Comment

Popular posts from this blog

qt - Using float or double for own QML classes -

-
i've created components , helper methods using c++ , qt used in qml gui. of methods calculate gui elements (size, transformations, scene graph items creation). target arm 32 bit using opengl / eglfs render output. opengl using float , qml using real (defined double ). what should use in c++ do not lose precision? if use qreal ( double ) shouldn't lose precision. if git grep float in qtbase.git , can find out bit more: dist/changes-5.2.0-**************************************************************************** dist/changes-5.2.0-* important behavior changes * dist/changes-5.2.0-**************************************************************************** dist/changes-5.2.0- dist/changes-5.2.0- - qt compiled qreal typedef'ed double on dist/changes-5.2.0: platforms. qreal float on arm chipsets before. guarantees more dist/changes-5.2.0- consistent behavior between platforms qt supports, binary dist/chan...
Read more

Create Outlook appointment via C# .Net -

-
i need create outlook appointment using microsoft.office.interop.outlook , while can work locally on own workstation , works if run web application via server's browser, not work when connect server externally. hence, think might permission issue. i changed application pool identity " localsystem " don't access denied error. unfortunately, doesn't work. the app behaves if appointment created, appointment doesn't appear in outlook. here include file on top of aspx.cs page using outlook = microsoft.office.interop.outlook; here code using pop appointment. outlook.application apptapp = new outlook.application(); outlook.appointmentitem appt = apptapp.createitem(outlook.olitemtype.olappointmentitem) outlook.appointmentitem; appt.subject = txtfirstname.text + " " + txtlastname.text; appt.body = txtcomment.text; appt.alldayevent = false; appt.start = datetime.parse(txtreminderdate.text + " 8:00 am"); appt.end = datetime.p...
Read more

ios - Swift Array Resetting Itself -

-
i have 2 arrays: pointhistory , datehistory . have nstimer , , when timer runs out, action called. in action appending int pointhistory , , current date string datehistory . here timer action: func timeraction() { let steppervalue = int(stepper.value) employee.numberofpoints = steppervalue networking.saveemployee(employee, completion: { (error) -> void in if error != nil { let alert = uialertcontroller(title: "error", message: "there error updating \(self.employee.name)'s points", preferredstyle: .alert) let alertaction = uialertaction(title: "ok", style: .cancel, handler: nil) alert.addaction(alertaction) self.presentviewcontroller(alert, animated: true, completion: nil) } }) var dateformatter = nsdateformatter() dateformatter.dateformat = "mm-dd-yyyy" dateformatter.timezone = nstimezone.localtimezone() var date = nsdate() var ...
Read more