objective c - How to Pass a Object to NextViewController in iOS? -

i parsing restkit values.i having entity called ey_connections attributes.just parsing values using rkmappingoperation in viewcontroller.m , stored values of mappingoperation object of ey_connections.

viewcontroller.m

@interface newconnectionviewcontroller() { dataaccesshandler *dataaccess; rkmappingresult *savedmappingresult; ey_connections *connect; }  -(void)requestconnectiondata { nsstring *requestpath = @"user_history/consumer/data.json"; [[rkobjectmanager sharedmanager]  getobjectsatpath:requestpath  parameters:nil  success: ^(rkobjectrequestoperation *operation, rkmappingresult *mappingresult) {      nslog(@"result arrray us: %@",mappingresult);      savedmappingresult = mappingresult;      connect = ((ey_connections *)savedmappingresult.firstobject);    }  failure: ^(rkobjectrequestoperation *operation, nserror *error) {      rklogerror(@"load failed error: %@", error);  }  ]; } 

if click save button means,it should pass attribute values of connect object homeviewcontroller.how pass these values.this button action

-(ibaction)save:(id)sender { //please update code pass connect object homeviewcontroller.  } 

link view controllers in storyboard segue , give segue name. then:

-(ibaction)save:(id)sender {     [self perfromseguewithidentifier:@"mysegue" sender:self];  }  - (void)prepareforsegue:(uistoryboardsegue *)segue sender:(id)sender {     // make sure segue name in storyboard same line     if ([[segue identifier] isequaltostring:@"mysegue"])     {         // reference destination view controller         yourviewcontroller *vc = [segue destinationviewcontroller];          // pass objects view controller here, like...         [vc setmyobjecthere:object];         // or maybe         vc.savedmappingresult = savedmappingresult;     } } 

maybe view controller somewhere else - different storyboard:

-(ibaction)save:(id)sender {     uistoryboard * story = [uistoryboard storyboardwithname:@"whereisit" bundle:nil];     yourviewcontroller *vc = [story instantiateinitialviewcontroller];     // add values     use instantiateviewcontrollerwithidentifier } 

since bit unclear view controller coming after or should save values , return previous controller here implementation delegate:

create delegate in newviewcontroller.h

@protocol newviewcontrollerdelegate     -(void) savemydata:(ey_connections*)connections; @end 

when calling newviewcontroller set delegate homeviewcontroller so:

newviewcontroller *nvc = // instantiate somehow nvc.delegate = self; 

then in homeviewcontroller implement method saving:

-(void) savemydata:(ey_connections*)connections{     // save data here variabels in home view controller } 

and then, in method call:

-(ibaction)save:(id)sender {     [delegate savemydata:connect]; } 

to have covered, can use unwind segue , reuse prepare segue had down there.

if using present view controller can:

a) use delegate shown above

b) cast presentingviewcontroller homeviewcontroller , assign there.

here explanation delegates:

https://developer.apple.com/library/ios/documentation/general/conceptual/cocoaencyclopedia/delegatesanddatasources/delegatesanddatasources.html