ios - Changing a Table View Controller to a Collection View Controller -

i have table view controller , want change collection view controller, app gets information using json.

i created collection view controller in storyboard. view controller called "upcomingreleasesviewcontroller" , have uicollectionviewcell called "upcomingreleasecell". in storyboard have label linked collection cell called "release_name".

i want transfer code had in tvc i'm having trouble updating it.

the code added upcomingreleasesviewcontroller.h (like had in tvc)

@interface upcomingreleasesviewcontroller : uicollectionviewcontroller  @property (strong, nonatomic) nsmutablearray *upcomingreleases;  @end 

i added code upcomingreleasesviewcontroller.m (i error when call cell.textlabel.text)

- (void)viewdidload {     [super viewdidload];      nsurl *upcomingreleaseurl = [nsurl urlwithstring:@"http://obscure-lake-7450.herokuapp.com/upcoming.json"];      nsdata *jsondata = [nsdata datawithcontentsofurl:upcomingreleaseurl];      nserror *error = nil;      nsdictionary *datadictionary = [nsjsonserialization jsonobjectwithdata:jsondata options:0 error:&error];      self.upcomingreleases = [nsmutablearray array];      nsarray *upcomingreleasesarray = [datadictionary objectforkey:@"upcoming_releases"];      (nsdictionary *upcomingreleasedictionary in upcomingreleasesarray) {         upcomingrelease *upcomingrelease = [upcomingrelease upcomingreleasewithname:[upcomingreleasedictionary objectforkey:@"release_name"]];         [self.upcomingreleases addobject:upcomingrelease];     } }  - (uicollectionviewcell *)collectionview:(uicollectionview *)collectionview cellforitematindexpath:(nsindexpath *)indexpath {     static nsstring *identifier = @"cell";      uicollectionviewcell *cell = [collectionview dequeuereusablecellwithreuseidentifier:identifier forindexpath:indexpath];      upcomingrelease *upcomingrelease = [self.upcomingreleases objectatindex:indexpath.row];      cell.textlabel.text = upcomingrelease.release_name;      return cell; } 

also in when using tvc had nsobject called "upcomingrelease" following code:

upcomingrelease.h

@interface upcomingrelease : nsobject  @property (nonatomic, strong) nsstring *release_name;  // designated initializer - (id) initwithtitle:(nsstring *)release_name; + (id) upcomingreleasewithname:(nsstring *)release_name;  @end 

upcomingrelease.m

@implementation upcomingrelease  - (id) initwithtitle:(nsstring *)release_name {     self = [super init];      if ( self ){         self.release_name = release_name;     }      return self; }  + (id) upcomingreleasewithname:(nsstring *)release_name {     return [[self alloc] initwithtitle:release_name]; }  @end 

should create nsobject new app , add code or should add upcomingreleasecell?

thanks.

have register custom cell?

    [self.collectionview registerclass:[upcomingreleasecell class] forcellwithreuseidentifier:@"upcomingreleasecell"];