objective c - Label data is erased when I back to the screen from tableview in iOS -
here json response label value.
{ "dry_cleaning" = 49; iron = 8; name = "shirt/tees"; wash = 15; "wash_iron" = 19; counts = 2; id = 1; total = 98; }, { "dry_cleaning" = 49; iron = 5; name = "kurta(short)"; wash = 20; "wash_iron" = 19; counts = 2; id = 2; total = 98; }, { "dry_cleaning" = 50; iron = 8; name = "kurta(long)"; wash = 15; "wash_iron" = 20; counts = 0; id = 3; }, { "dry_cleaning" = 50; iron = 5; name = shorts; wash = 15; "wash_iron" = 19; counts = 0; id = 4; }, { "dry_cleaning" = 55; iron = 8; name = "trousers/pyjamas"; wash = 20; "wash_iron" = 30; counts = 0; id = 5; }, { "dry_cleaning" = 70; iron = 7; name = jeans; wash = 20; "wash_iron" = 29; counts = 0; id = 6; }, { "dry_cleaning" = 150; iron = 5; name = blazer; wash = 25; "wash_iron" = 19; counts = 0; id = 7; }, { "dry_cleaning" = 100; iron = 6; name = "leather_jacket"; wash = 30; "wash_iron" = 36; counts = 0; id = 8; }, { "dry_cleaning" = 100; iron = 13; name = "lungi/dhoti(long)"; wash = 12; "wash_iron" = 15; counts = 0; id = 9; }, here first screenshot:
i complete increment in specific cell. when click place order button display total amount screen.
second screenshot:
third screenshot:
when screen stepper label value zero. want editable value in specific cell.
here code.
order.h
#import <uikit/uikit.h> #import "customcell.h" @interface order : uiviewcontroller<uitableviewdatasource,uitableviewdelegate,uitextfielddelegate> @property (weak, nonatomic) iboutlet uitableview *tableview; - (ibaction)placeorder:(id)sender; @property (weak, nonatomic) iboutlet uibutton *btn_placeorder; @end order.m
// // order.m // laundryapp // // created tranetech on 13/01/16. // copyright (c) 2016 tranetech. rights reserved. // #import "order.h" #import "customcell.h" #import "totalamount.h" #import "globalvariabe.h" @interface order () @end @implementation order { nsdictionary *dic_property; // nsarray *dic_property; nsmutabledictionary *data; } - (void)viewdidload { [super viewdidload]; [self.tableview reloaddata]; globalvariabe *global=[globalvariabe sharedinstance]; [nsthread detachnewthreadselector:@selector(fetchdata) totarget:self withobject:nil]; global.arraycounts = [nsmutablearray array]; // nslog(@"array count=%lu",(unsigned long)global.arraycounts.count); // [self.tableview registernib:[uinibnibwithnibname:@"customcell"bundle:nil] forcellreuseidentifier:@"cell"]; // additional setup after loading view. } -(void)fetchdata { nsstring *login= [[nsstring stringwithformat:@"http:/men_dry.php"]stringbyaddingpercentescapesusingencoding:nsutf8stringencoding]; nslog(@"----%@", login); nsurl *url = [nsurl urlwithstring:[login stringbyaddingpercentescapesusingencoding:nsutf8stringencoding]]; //-- request , response though url nsmutableurlrequest *request = [[nsmutableurlrequest alloc]initwithurl:url]; [nsurlconnection sendasynchronousrequest:request queue:[nsoperationqueue mainqueue] completionhandler:^(nsurlresponse *response, nsdata *data, nserror *error) { dispatch_async(dispatch_get_main_queue(), ^{ if (data) { dic_property= [nsjsonserialization jsonobjectwithdata:data options:nsjsonreadingmutablecontainers error:nil]; nslog(@"%@", dic_property); // nslog(@"counts=%d",[[dic_property objectforkey:@"data"]count]); // (int = 0; i<[[dic_property objectforkey:@"data"] count]; i++) { // [self.arraycounts insertobject:[nsstring stringwithformat:@"0"] atindex:i]; // } nsarray *temparray = dic_property[@"data"]; (int i=0; i<temparray.count; i++) { nsmutabledictionary *dictvalues = [nsmutabledictionary dictionarywithdictionary:temparray[i]]; [dictvalues setvalue:@"0" forkey:@"counts"]; globalvariabe *global=[globalvariabe sharedinstance]; [global.arraycounts addobject:dictvalues]; } [self.tableview reloaddata]; } else { nslog(@"network error, %@", [error localizedfailurereason]); } }); }]; } - (cgfloat)tableview:(uitableview *)tableview heightforrowatindexpath:(nsindexpath *)indexpath { return 100; } - (nsinteger)tableview:(uitableview *)tableview numberofrowsinsection:(nsinteger)section { globalvariabe *global=[globalvariabe sharedinstance]; return global.arraycounts.count; } - (uitableviewcell *)tableview:(uitableview *)tableview cellforrowatindexpath:(nsindexpath *)indexpath { static nsstring *simpletableidentifier = @"simpletableitem"; customcell *cell = (customcell *)[self.tableview dequeuereusablecellwithidentifier:simpletableidentifier]; if (cell == nil) cell = [[[nsbundle mainbundle] loadnibnamed:@"customcell" owner:self options:nil] objectatindex:0]; globalvariabe *global=[globalvariabe sharedinstance]; // nsuserdefaults *userdefaults = [nsuserdefaults standarduserdefaults]; // nsmutablearray *test=[userdefaults objectforkey:@"finalarray"]; cell.lbl_value.text = [nsstring stringwithformat:@"%@",global.arraycounts[indexpath.row][@"counts"]]; nslog(@"strainfffdf=%@",[nsstring stringwithformat:@"%@",global.arraycounts[indexpath.row][@"counts"]]); cell.lbl_title.text=[nsstring stringwithformat:@"%@",global.arraycounts[indexpath.row][@"name"]]; cell.lbl_price.text=[nsstring stringwithformat:@"%@",global.arraycounts[indexpath.row][@"dry_cleaning"]]; cell.txt1.text=[nsstring stringwithformat:@"%@",global.arraycounts[indexpath.row][@"counts"]]; [cell.stepper addtarget:self action:@selector(itemschange:) forcontrolevents:uicontroleventvaluechanged]; return cell; } - (void)didreceivememorywarning { [super didreceivememorywarning]; // dispose of resources can recreated. } - (void)tableview:(uitableview *)tableview didselectrowatindexpath:(nsindexpath *)indexpath { } - (void)itemschange:(uistepper*)stepper { cgpoint cursorposition = [stepper convertpoint:cgpointzero toview:self.tableview]; nsindexpath *indexpath = [self.tableview indexpathforrowatpoint:cursorposition]; customcell *currentcell = (customcell *)[self.tableview cellforrowatindexpath:indexpath]; double value = [stepper value]; int x = [currentcell.lbl_value.text intvalue]; int price=[currentcell.lbl_price.text intvalue]; int y= x * price; [currentcell.lbl_value settext:[nsstring stringwithformat:@"%d", (int)value]]; currentcell.txt1.text=[nsstring stringwithformat:@"%d", (int)value]; globalvariabe *global=[globalvariabe sharedinstance]; global.arraycounts[indexpath.row][@"counts"] = [nsstring stringwithformat:@"%d",(int)value]; global.arraycounts[indexpath.row][@"total"] = [nsstring stringwithformat:@"%d",(int)y]; } /* #pragma mark - navigation // in storyboard-based application, want little preparation before navigation - (void)prepareforsegue:(uistoryboardsegue *)segue sender:(id)sender { // new view controller using [segue destinationviewcontroller]. // pass selected object new view controller. } */ - (ibaction)placeorder:(id)sender { nspredicate *predicate = [nspredicate predicatewithformat:@"counts != %@",@"0"]; globalvariabe *global=[globalvariabe sharedinstance]; nsuserdefaults *userdefaults = [nsuserdefaults standarduserdefaults]; global.filteredarray = [global.arraycounts filteredarrayusingpredicate:predicate]; nslog(@"button click event=%@",global.arraycounts); if(global.filteredarray.count > 0) { [userdefaults setobject:global.filteredarray forkey:@"def_orderarraylist"]; [userdefaults setobject:global.arraycounts forkey:@"finalarray"]; [userdefaults synchronize]; } // nslog(@"value:%@",global.filteredarray); nslog(@"default array=%@",[userdefaults objectforkey:@"finalarray"]); totalamount *nextpage=[self.storyboard instantiateviewcontrollerwithidentifier:@"totalamountpage"]; [self presentviewcontroller:nextpage animated:yes completion:nil]; } @end how editable label value when return screen?
instead of calling fetchdata method in -(void)viewdidload method, should call method in -(void)viewwillappear:(bool)animated method. , use [self.navigationcontroller popviewcontrolleranimated:yes] go viewcontroller.
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