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iOS Build a Self-Destructing Message iPhone App Capturing Photo and Video Using UIImagePickerController Adding Recipients

Problem: if you log out and sign up as new user - tableview of friends remain still, with friends of previous user!


  1. user1 is logged in and has some friends.
  2. user1 logged out.
  3. sign up as a new user2.
  4. tableview of friendsviewcontroller does not change, so you can see all friends of user1 untill you edit your friends!
#import "FriendsViewController.h"
#import "EditFriendsViewController.h"

@interface FriendsViewController ()


@implementation FriendsViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.friendsRelation = [[PFUser currentUser] objectForKey:@"friendsRelation"];

    PFQuery* query = [self.friendsRelation query];
    [query orderByAscending:@"username"];
    [query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
        if (error) {
            NSLog(@"error: %@ %@",error,[error userInfo]);
            self.friends = objects;
            [self.tableView reloadData];

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
    if ([segue.identifier isEqualToString:@"showEditFriends"]) {
        EditFriendsViewController* viewController = (EditFriendsViewController*)segue.destinationViewController;
        viewController.friends = [NSMutableArray arrayWithArray:self.friends];

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    // Return the number of sections.
    return 1;

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    // Return the number of rows in the section.
    return self.friends.count;

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell"

    PFUser* user = [self.friends objectAtIndex:indexPath.row];
    cell.textLabel.text = user.username;

    return cell;


2 Answers

Matthew Reed
Matthew Reed
Courses Plus Student 17,986 Points

I think whenever the friends list changes you have to call reloadData on the table view

Instead of using the viewDidLoad method, use the viewWillAppear method or the viewDidAppear method. This was explained in a previous video.