Did Selected Row App Crash - ios

Question

Hello everyone I was following a tutorial where I explain how to expand the cells did with selected row
I've implemented all the array and returns the data correctly but when I go to select the cell to expand my application crashes giving me back this error
[ PFObject sizeWithFont : constrainedToSize : lineBreakMode :]: unrecognized selector sent to instance
with the breakpoint I find the point but I do not understand what's wrong ...
The point where the app crashes is
CGSize AltezzaLabel = [ [ ArrayforPost objectAtIndex : index ] sizew sizeWithFont : [ UIFont fontWithName : # " Helvetica " size : 14.0f ] constrainedToSize : MAX lineBreakMode : NSLineBreakByCharWrapping ] ;
Below I provide the implementation for better understanding
#import "FFTimeline.h"
#import "FFCustomCellTimelineSocial.h"
#interface FFTimeline ()
#end
#implementation FFTimeline
#synthesize ArrayforPost, NuovoArray;
#synthesize IsFlashPost;
- (void)viewDidLoad
{
[super viewDidLoad];
self.FFTableView.delegate = self;
self.FFTableView.dataSource = self;
CellaSelezionata = -1;
}
-(void)viewDidAppear:(BOOL)animated {
[self QueryForPost];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [ArrayforPost count];
}
-(void)QueryForPost {
PFQuery *QueryForFriend=[PFQuery queryWithClassName:FF_AMICIZIE_CLASS];
[QueryForFriend whereKey:FF_AMICIZIE_A_USER equalTo:[PFUser currentUser]];
[QueryForFriend whereKey:FF_AMICIZIE_STATO equalTo:#"Confermato"];
[QueryForFriend includeKey:FF_AMICIZIE_DA_USER];
PFQuery *QueryYES = [PFQuery queryWithClassName:FF_POST_CLASS];
[QueryYES whereKey:FF_POST_FLASH_POST_BOOLEANVALUE equalTo:[NSNumber numberWithBool:YES]];
[QueryYES whereKey:FF_POST_SCELTI equalTo:[PFUser currentUser]];
PFQuery *normalPostByFriends = [PFQuery queryWithClassName: FF_POST_CLASS];
[normalPostByFriends whereKey: FF_POST_FLASH_POST_BOOLEANVALUE equalTo: [NSNumber numberWithBool: NO]];
[normalPostByFriends whereKey: FF_POST_UTENTE matchesKey:FF_AMICIZIE_DA_USER inQuery:QueryForFriend];
PFQuery *normalPostByUser = [PFQuery queryWithClassName:FF_POST_CLASS];
[normalPostByUser whereKey:FF_POST_FLASH_POST_BOOLEANVALUE equalTo: [NSNumber numberWithBool: NO]];
[normalPostByUser whereKey:FF_POST_UTENTE equalTo: [PFUser currentUser]];
PFQuery *query = [PFQuery orQueryWithSubqueries:#[QueryYES,normalPostByFriends,normalPostByUser]];
[query includeKey:FF_POST_UTENTE];
[query orderByDescending:FF_CREATEDAT];
[query findObjectsInBackgroundWithBlock:^(NSArray *results, NSError *error) {
if (!error) {
NSLog(#"%#", results);
ArrayforPost = [[NSMutableArray alloc] init];
for (PFObject *object in results) {
[ArrayforPost addObject:object];
}
[self.FFTableView reloadData];
}
}];
}
-(CGFloat)valoreAltezzaCella:(NSInteger)index {
CGSize MAX = CGSizeMake(230, 10000);
CGSize AltezzaLabel = [[ArrayforPost objectAtIndex:index] sizeWithFont:[UIFont fontWithName:#"Helvetica" size:14.0f] constrainedToSize:MAX lineBreakMode:NSLineBreakByWordWrapping];
return AltezzaLabel.height;
}
- (FFCustomCellTimelineSocial *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
FFCustomCellTimelineSocial *cell = (FFCustomCellTimelineSocial * )[self.FFTableView dequeueReusableCellWithIdentifier:#"CellPost"];
if (!cell) {
cell = [[FFCustomCellTimelineSocial alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:#"CellPost"];
}
if (CellaSelezionata == indexPath.row) {
CGFloat AltezzaLabel = [self valoreAltezzaCella: indexPath.row];
cell.FFTestoUtenteLabel.frame = CGRectMake(cell.FFTestoUtenteLabel.frame.origin.x, cell.FFTestoUtenteLabel.frame.origin.y, cell.FFTestoUtenteLabel.frame.size.width, AltezzaLabel);
} else {
cell.FFTestoUtenteLabel.frame = CGRectMake(cell.FFTestoUtenteLabel.frame.origin.x, cell.FFTestoUtenteLabel.frame.origin.y, cell.FFTestoUtenteLabel.frame.size.width, 65);
}
PFObject *ObjectPost = [ArrayforPost objectAtIndex:indexPath.row];
cell.FFTestoUtenteLabel.font = [UIFont fontWithName:#"Helvetica" size:14.0f];
NSString *text = [ObjectPost objectForKey:#"Testo"];
cell.FFTestoUtenteLabel.text = text;
[cell.FFTestoUtenteLabel setLineBreakMode:NSLineBreakByWordWrapping];
cell.backgroundCell.layer.masksToBounds = YES;
cell.backgroundCell.layer.cornerRadius = 5.0f;
cell.backgroundFotoProfilo.layer.masksToBounds = YES;
cell.backgroundFotoProfilo.layer.cornerRadius = 35.0f;
cell.FFImmagineUtente.layer.masksToBounds = YES;
cell.FFImmagineUtente.layer.cornerRadius = 30.0f;
cell.FFImmagineUtente.contentMode = UIViewContentModeScaleAspectFill;
PFObject *rowObject = [ArrayforPost objectAtIndex:indexPath.row];
if([[rowObject objectForKey:FF_POST_FLASH_POST_BOOLEANVALUE ] boolValue]) {
cell.FlashPostImg.image = [UIImage imageNamed:#"FFNotificaFlash"];
}
else {
cell.FlashPostImg.image = [UIImage imageNamed:#" "];
}
return cell;
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath;
{
if (CellaSelezionata == indexPath.row)
{
return [self valoreAltezzaCella:indexPath.row] + 10 * 2;
}
else {
return 65 + 10 * 2;
}
}
-(NSIndexPath *)tableView:(UITableView *)tableView willSelectRowAtIndexPath:(NSIndexPath *)indexPath {
if ([self valoreAltezzaCella:indexPath.row] > 65) {
return indexPath;
} else {
return nil;
}
}
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
if (CellaSelezionata == indexPath.row) {
CellaSelezionata = -1;
[tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
return;
}
if (CellaSelezionata >= 0) {
NSIndexPath *previousPath = [NSIndexPath indexPathForRow:CellaSelezionata inSection:0];
CellaSelezionata = indexPath.row;
[tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:previousPath] withRowAnimation:UITableViewRowAnimationFade];
}
CellaSelezionata = indexPath.row;
[tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
}

Answer 1

In your valoreAltezzaCella: method, [ArrayforPost objectAtIndex:index] is a PFObject and not a NSString, so you cannot apply sizeWithFont to it. You probably want something similar to:
PFObject *objectPost = [ArrayforPost objectAtIndex:indexPath.row];
NSString *text = [objectPost objectForKey:#"Testo"];
CGSize altezzaLabel = [text sizeWithFont:[UIFont fontWithName:#"Helvetica" size:14.0f] constrainedToSize:MAX lineBreakMode:NSLineBreakByWordWrapping];