nsexception - ERROR SHOWING in program code ios - 


 -(void)textfielddidbeginediting:(uitextfield *)textfield  {      [textfield resignfirstresponder];        picker   = [[uidatepicker alloc] initwithframe:cgrectmake(0, 290, 320, 216)];        [picker setdatepickermode:uidatepickermodedate];     picker.backgroundcolor = [uicolor redcolor];      self.txt_dob.inputview = picker;     [picker setmaximumdate:[nsdate date]];      format=[[nsdateformatter alloc]init];      [format setdateformat:@"dd/mm/yyyy"];      [self.view addsubview:picker];      uitoolbar *toolbar= [[uitoolbar alloc] initwithframe:cgrectmake(0,0,320,44)];      [toolbar setbarstyle:uibarstyleblackopaque];      uibarbuttonitem *barbuttondone = [[uibarbuttonitem alloc] initwithtitle:@"done"                                                 style:uibarbuttonitemstylebordered target:self action:@selector(showselecteddate:)];      toolbar.items = @[barbuttondone];      barbuttondone.tintcolor=[uicolor blackcolor];      [picker addsubview:toolbar];  }  {  nsdateformatter *dateformatter = [[nsdateformatter alloc] init];  [dateformatter setdateformat:@"dd-mmm-yyyy"];  nsdate *startd = [dateformatter datefromstring:@"15-sep-1997"];  nsdate *endd = [nsdate date];   nscalendar *calendar = [nscalendar currentcalendar];  //nsuinteger unitflags = nscalendarunityear|nscalendarunitmonth|//nscalendarunitday|nscalendarunithour|nscalendarunitminute|nscalendarunitsecond;  nsdatecomponents *components = [calendar components:unitflags fromdate:startd todate:endd options:0];  nsinteger year  = [components year];  nsinteger month  = [components month];  nsinteger day  = [components day];  nslog(@"%ld:%ld:%ld", (long)year, (long)month,(long)day); }  @end

try select date date picker... 

-(bool)textfieldshouldbeginediting:(uitextfield *)textfield { datepicker =[[uidatepicker alloc]initwithframe:cgrectmake(50,150,10, 50)]; datepicker.datepickermode=uidatepickermodedate; datepicker.hidden=no; datepicker.date=[nsdate date]; [datepicker addtarget:self action:@selector(textfieldtitle:) forcontrolevents:uicontroleventvaluechanged]; [self.view addsubview:datepicker]; uibarbuttonitem * rightbtn=[[uibarbuttonitem alloc]initwithtitle:@"done" style:uibarbuttonitemstyledone target:self action:@selector(save:)]; self.navigationitem.rightbarbuttonitem=rightbtn; return true; }   -(void)textfieldtitle:(id)sender  { nsdateformatter *dateformat=[[nsdateformatter alloc]init]; dateformat.datestyle=nsdateformattermediumstyle; [dateformat setdateformat:@"mm/dd/yyyy"]; nsstring *str=[nsstring stringwithformat:@"%@",[dateformat  stringfromdate:datepicker.date]]; self.txtfield.text=str; }  -(void)save:(id)sender { self.navigationitem.rightbarbuttonitem=nil; [datepicker removefromsuperview];  }

to calculate date.... 

nsdate *today = [nsdate date]; nsstring *birthdate=self.txtfield.text; nsdateformatter *dateformatter1 = [[nsdateformatter alloc] init]; [dateformatter1 setdateformat:@"dd-mm-yyyy"]; nsdate *mydate = [[nsdate alloc]init]; mydate=[dateformatter1 datefromstring:birthdate];   nsdatecomponents *agecomponents = [[nscalendar currentcalendar]                                    components:nscalendarunityear|nscalendarunitmonth|nscalendarunitday                                    fromdate:mydate                                    todate:today                                    options:0];  nslog(@"%@",agecomponents);

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