Pass Data to another view controller - ios

Question

I have a two view controllers (DatePickerViewController and RouteHistoryViewController). I also have the server response in DatePickerViewController. How can I pass that response to the RouteHitoryViewController. The RouteHistoryViewController has a map view.
Here is the code DatePicker.m :
#import "DatePickerViewController.h"
#import "MapAnnotation.h"
#interface DatePickerViewController ()
#end
#implementation DatePickerViewController
{
//#define URL #"http://140e3087.ngrok.com"
#define URL3 #"http://784effb4.ngrok.com/bustracking/json/student/route_history"
NSString *formatedDate;
NSString *lat;
NSString *longi;
NSString *server_created_date;
}
#synthesize appDelagate,datePicker;
- (void)viewDidLoad {
[super viewDidLoad];
AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
NSLog(#"%#", appDelegate);
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:#"yyyy-MM-dd HH:mm"];
formatedDate = [dateFormatter stringFromDate:self.datePicker.date];
// Do any additional setup after loading the view.
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)sendPicker:(id)sender;
{
[self sendDataToServer : #"GET"];
// NSLog(#"%#", formatedDate);
//self.selectedDate.text =formatedDate;
}
-(void) sendDataToServer : (NSString *) method{
NSString *beaconiD = #"EC112729B51B";
NSString *trackerID = #"e61078a67e4233ad";//appDelagate.tracker_id;
NSString *date = formatedDate;
NSMutableURLRequest *request = nil;
NSString *getURL = [NSString stringWithFormat:#"%#?beacon_id=%#&tracker_id=%#&date=%#", URL3, beaconiD, trackerID, date];
getURL = [getURL stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSURL *url = [NSURL URLWithString: getURL];
request = [NSMutableURLRequest requestWithURL:url];
NSLog(#"link: %#", getURL);
[request setHTTPMethod:#"GET"];
[request addValue: #"application/x-www-form-urlencoded; charset=utf-8" forHTTPHeaderField:#"Content-Type"];
NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
NSLog(#"connection: %#", connection);
if( connection )
{
mutData = [NSMutableData new];
}
else
{
NSLog (#"NO_CONNECTION");
return;
}
}
#pragma mark NSURLConnection delegates
-(void) connection:(NSURLConnection *) connection didReceiveResponse:(NSURLResponse *)response
{
[mutData setLength:0];
}
-(void) connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[mutData appendData:data];
}
-(void) connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
NSLog (#"NO_CONNECTION");
return;
}
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
// NSString *jsonresultString =[jsonresultDict objectForKey:#"result"];
// NSLog(#"%#", jsonresultString);
// //serverResponse.text = jsonresultString;
NSError *error = nil;
NSDictionary *json = [NSJSONSerialization JSONObjectWithData:mutData options:kNilOptions error:&error];
NSArray *fetchedArr = [json objectForKey:#"result"];
for (NSDictionary *user in fetchedArr)
{
lat = [user objectForKey:#"latitude"];
longi = [user objectForKey:#"longitude"];
server_created_date = [user objectForKey:#"server_created_date"];
NSLog(#"Item date&time : %#", server_created_date);
NSLog(#"Item longitude : %#", longi);
NSLog(#"Item latitude : %#", lat);
}
}
Here is the code RouteHistory.m:
#import "RouteHistoryViewController.h"
#import "MapAnnotation.h"
#interface RouteHistoryViewController ()
#property (weak, nonatomic) IBOutlet MKMapView *mapView;
#end
#implementation RouteHistoryViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.mapView.delegate = self;
//[self.mapView removeAnnotations:self.mapView.annotations];
MapAnnotation *mapPoint = [[MapAnnotation alloc] init];
mapPoint.coordinate = CLLocationCoordinate2DMake([self.appDelagate.latitude doubleValue], [self.appDelagate.longitude doubleValue]);
mapPoint.title = self.appDelagate.name;
mapPoint.time = self.appDelagate.server_created_date;
mapPoint.mapimage = self.appDelagate.image;
// Add it to the map view
[self.mapView addAnnotation:mapPoint];
// Zoom to a region around the pin
MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(mapPoint.coordinate, 500, 500);
[self.mapView setRegion:region];
//testing
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(receiveTestNotification:)
name:#"MapUpdate"
object:nil];
// Do any additional setup after loading the view.
}
#pragma mark - MKMapViewDelegate
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation
{
MKPinAnnotationView *view = nil;
static NSString *reuseIdentifier = #"MapAnnotation";
// Return a MKPinAnnotationView with a simple accessory button
view = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:reuseIdentifier];
if(!view)
{
view = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:reuseIdentifier];
view.canShowCallout = YES;
view.animatesDrop = YES;
}
return view;
}
datepicker to route history using prepareforsegue
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([[segue identifier]isEqualToString:#"b"])
{
RouteHistoryViewController *rh = segue.destinationViewController;
NSLog(#"%#", rh);
}
}

Answer 1

In first view controller inside connectionDidFinishLoading after this line
NSArray *fetchedArr = [json objectForKey:#"result"];
add the following two lines
_responseFromServer = fetchedArr;
[self performSegueWithIdentifier:#"segueToRouteHistory" sender:self];
and then add this method in your first View Controller
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([[segue identifier] isEqualToString:#"segueToRouteHistory"])
{
RouteHistoryViewController *routeHistoryController = [segue segueToRouteHistory];
[routeHistoryController setFetchedArray:_responseFromServer];
}
}
In your First View Controller .h file add this
#property NSArray *responseFromServer;
Now We have assigned the Response array received from server to a object in your destination view controller.
Don't forget to add
#property NSArray *fetchedArray;
inside your Second ViewController's .h file
Now you can access this array in second view controller.
PS: Do not forget to give segue from storyboard from first view controller to second view controller and name the Segue Identifier as "segueToRouteHistory"