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Add Parse query array to UIPickerView

I have a query that returns an array and I would like to set the picker view title values to the values in this array. I am able to do this with an array declared in the viewDidLoad method but not an array created from a Parse.com query. Thanks

Here is my query:

PFQuery *query = [PFQuery queryWithClassName:@"Post"];
    [query selectKeys:@[@"title"]];
    NSArray *array = [query findObjects];


What Does NSLog prints ?

The NSLog prints

2014-08-28 11:48:52.155 AppName[7723:60b] Warning: A long-running operation is being executed on the main thread. 
 Break on warnBlockingOperationOnMainThread() to debug.
2014-08-28 11:48:53.062 AppName[7723:60b] (
    "<Post:K4d3o5GgzA:(null)> {\n    title = test2;\n}",
    "<Post:gs0HzzCIly:(null)> {\n    title = rhhe;\n}",
    "<Post:ETGucmCO7b:(null)> {\n    title = aaa;\n}",
    "<Post:PfOOzjLiFj:(null)> {\n    title = aaa;\n}",
    "<Post:NbP7VNQRh9:(null)> {\n    title = aaa;\n}",
    "<Post:reb3PmgONC:(null)> {\n    title = abb;\n}",
    "<Post:ZqBiNvX1dL:(null)> {\n    title = new;\n}",
    "<Post:s5qIHY33LH:(null)> {\n    title = test;\n}",
    "<Post:G6apcaFv6F:(null)> {\n    title = testing;\n}",
    "<Post:gCEXvaIear:(null)> {\n    title = tester;\n}"

1 Answer

Hey tom,

funny because i wrote similar code a couple hours ago, here's what i did.

//i have a mutable array called users to store all the returned objects

//search method where i get the data
PFQuery *query = [PFUser query];
[query whereKey:@"username" containsString:findUserField.text];
[query whereKeyExists:@"profilePicture"];

[query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
            if (error) {
                UIAlertView *errorFindingUsers = [[UIAlertView alloc]initWithTitle:@"Oh no"
                                                                           message:@"An error occured while fetching the users."
                                                                 otherButtonTitles:@"OK", nil];
                [errorFindingUsers show];
                [hud hide:YES];
                [self.users addObjectsFromArray:objects];
                NSLog(@"query successful and the first user is %@", objects[0]);
                [self.collectionView reloadData];
                [hud hide:YES];

//then set my cells
UILabel *userNameLabel = [[UILabel alloc]initWithFrame:CGRectMake(75, 10, 100, 50)];
userNameLabel.text = (NSString*)self.users[indexPath.row][@"username"];
userNameLabel.backgroundColor = [UIColor clearColor];
userNameLabel.font = [UIFont fontWithName:@"Arial-BoldItalicMT" size:20];
[cell addSubview:userNameLabel];

anyways key thing here is that i do

userNameLabel.text = (NSString*)self.users[indexPath.row][@"username"];

so in you case you do the same for your array

NSMutableArray *someArrayOfTitle = [NSMutableArray new];

for(int i = 0 ; i < array.count ; i++){
   NSString *someString =  (NSString*)array[i][@"title"];
   [someArrayOfTitle addObject someString];

anyways this should work,

I'm quite tired to I'll review what i wrote tomorrow but in the mean time hope the helps

best, Kai