Parse and Populating TableView - ios

I have been trying to do this for a few days and Im stuck. I am using parse as my backend. I don't want to use parse's own ParseTableView to setup my View. I want to understand what is going on with this basic app before I start a more difficult app. How do I use the data from parse to populate my Table??? Thank you.
//
// ViewController.m
// BraveRetiredNumbers
//
#import "ViewController.h"
#interface ViewController ()
#property (strong, nonatomic) IBOutlet UITableView *playerTableView;
#property (strong, nonatomic) NSArray *testArrary;
#property (strong, nonatomic) NSString *parseClassName;
#end
#implementation ViewController
#synthesize testArrary;
#synthesize playerArray;
#synthesize playerTableView;
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
[self performSelector:#selector(retrieveFromParse)];
self.testArrary = #[#"Apple",#"Banana",#"Peach",#"Grape",#"Strawberry",#"Watermelon"];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [self.playerArray count];
//return [testArrary count];
}
- (void) retrieveFromParse {
PFQuery *query = [PFQuery queryWithClassName:#"Player"];
[query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
NSLog(#"%#\n",objects);
if (!error) {
playerArray = [[NSArray alloc] initWithArray:objects];
}
}];
[playerTableView reloadData];
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
[playerTableView deselectRowAtIndexPath:indexPath animated:YES];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *SimpleIdentifier = #"playerCell";
UITableViewCell *cell = [playerTableView dequeueReusableCellWithIdentifier:SimpleIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:SimpleIdentifier];
}
//PFObject *tempObject = [playerArray objectAtIndex:indexPath.row];
//NSDictionary *tempDic = [playerArray objectAtIndex:#"playerName"];
cell.textLabel.text = [tempDic objectForKey:#"playerName"];
//cell.textLabel.text = [testArrary objectAtIndex:indexPath.row];
return cell;
}
#end

Related

My SearchDisplayController doesn't work well with UITableView in UIViewController

Here I have a Search Bar on the top of the UIViewController, and also a UITableView below the Search Bar.
When I don't Search things, the tableView could display things well, but when I search, the searchResultTableView can only show some white cell, not the correct result.
Here is the .h file:
#import <UIKit/UIKit.h>
#interface MySearchViewController : UIViewController <UITableViewDelegate, UITableViewDataSource>
#property (weak, nonatomic) IBOutlet UITableView *myTableView;
- (void)reloadView;
#end
And here is the .m file:
#import "MySearchViewController.h"
#import "MyEventInfo.h"
#import "MyEventTableViewCell.h"
#import "MyEventDetailViewController.h"
#interface MySearchViewController ()
#property NSUserDefaults *usrDefault;
#end
#implementation MySearchViewController {
NSMutableArray *events;
NSArray *searchResults;
}
- (void)viewDidLoad {
[super viewDidLoad];
self.usrDefault = [NSUserDefaults standardUserDefaults];
events = [[NSMutableArray alloc] init];
[self extractEventArrayData];
}
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:YES];
[self reloadView];
}
- (void)reloadView {
NSLog(#"reloadView");
events = [[NSMutableArray alloc] init];
[self extractEventArrayData];
[self.myTableView reloadData];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)extractEventArrayData {
NSArray *dataArray = [[NSArray alloc] initWithArray:[self.usrDefault objectForKey:#"eventDataArray"]];
for (NSData *dataObject in dataArray) {
MyEventInfo *eventDecodedObject = [NSKeyedUnarchiver unarchiveObjectWithData:dataObject];
[events addObject:eventDecodedObject];
}
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if (tableView == self.myTableView) {
return [events count];
} else {
NSLog(#"searchResults count:%lu",(unsigned long)[searchResults count]);
return [searchResults count];
}
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
return 360;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"CustomTableCell";
MyEventTableViewCell *cell = (MyEventTableViewCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
// Configure the cell...
if (cell == nil) {
cell = [[MyEventTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
// Display MyEventTableViewCell in the table cell
MyEventInfo *event = nil;
if (tableView == self.myTableView) {
event = [events objectAtIndex:indexPath.row];
} else {
event = [searchResults objectAtIndex:indexPath.row];
NSLog(#"name of event:%#", event.nameOfEvent);
}
cell.nameOfEvent.text = event.nameOfEvent;
cell.imageOfEvent.image = [UIImage imageNamed:event.imageOfEvent];
cell.timeOfEvent.text = event.timeOfEvent;
cell.locationOfEvent.text = event.locationOfEvent;
cell.dateOfEvent.text = event.dateOfEvent;
return cell;
}
- (void)filterContentForSearchText:(NSString*)searchText
{
NSPredicate *resultPredicate = [NSPredicate predicateWithFormat:#"nameOfEvent contains[c] %#", searchText];
searchResults = [events filteredArrayUsingPredicate:resultPredicate];
}
-(BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString
{
[self filterContentForSearchText:searchString];
return YES;
}
#end
And on the storyboard I've already set the tableView's delegate and datasource to self. This drives me crazy, I cannot figure out what's wrong. Could someone help me out? Thanks.
when searching, cell's objects were all null, and had nothing in itself
when not searching, the cell is well with objects that had content the same as event

self.objects is empty in PFQueryTableViewController

I am trying to display data in different sections using PFQueryTableViewController. The code suggested in https://parse.com/questions/using-pfquerytableviewcontroller-for-uitableview-sections seemed to work, but I couldn't get the data to load on self.objects. Here is my code:
#import "AKAdminViewStudentsViewController.h"
#interface AKAdminViewStudentsViewController ()
#property (strong, nonatomic) NSMutableDictionary *sections;
#property (strong, nonatomic) NSMutableDictionary *sectionToClassMap;
#end
#implementation AKAdminViewStudentsViewController
#synthesize sections = _sections;
#synthesize sectionToClassMap = _sectionToClassMap;
- (id)initWithCoder:(NSCoder *)aDecoder
{
self = [super initWithCoder:aDecoder];
if (self) {
self.parseClassName = #"Students";
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
[self.tableView reloadData];
NSLog(#"sections found: %#", self.sections); // returns null
NSLog(#"sectionToClassMap: %#", self.sectionToClassMap); // returns null
NSLog(#"objects in table: %#", self.objects); // this found to be empty
}
...
#pragma mark - Tableview methods
- (PFQuery *)queryForTable
{
PFQuery *queryStudents = [PFQuery queryWithClassName:#"Students"];
[queryStudents whereKey:#"student_admin" equalTo:[PFUser currentUser]];
if ([self.objects count]==0) {
queryStudents.cachePolicy = kPFCachePolicyCacheThenNetwork;
}
[queryStudents orderByAscending:#"class_name"];
return queryStudents;
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return self.sections.allKeys.count;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
NSString *className = [self classForSection:section];
NSArray *rowIndicesInSection = [self.sections objectForKey:className];
return rowIndicesInSection.count;
}
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
NSString *className = [self classForSection:section];
return className;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath object:(PFObject *)object
{
static NSString *CellIdentifier = #"Students";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
if (cell==nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
}
// Configure cell
cell.textLabel.text = [NSString stringWithFormat:#"%#", object[#"full_name"]];
NSDateFormatter *formatDate = [[NSDateFormatter alloc] init];
[formatDate setDateStyle:NSDateFormatterShortStyle];
cell.detailTextLabel.text = [NSString stringWithFormat:#"%#", [formatDate stringFromDate:object[#"createdAt"]]];
return cell;
}
#pragma mark - Helper methods
- (void)objectsDidLoad:(NSError *)error
{
[super objectsDidLoad:error];
// Clear data before loading
[self.sections removeAllObjects];
[self.sectionToClassMap removeAllObjects];
NSInteger section = 0;
NSInteger rowIndex = 0;
for (PFObject *object in self.objects) {
NSString *className = [object objectForKey:#"class_name"];
NSMutableArray *objectsInSection = [self.sections objectForKey:className];
if (!objectsInSection) {
objectsInSection = [NSMutableArray array];
// Create new section for new class found
[self.sectionToClassMap setObject:className forKey:[NSNumber numberWithInt:section++]];
}
[objectsInSection addObject:[NSNumber numberWithInt:rowIndex++]];
[self.sections setObject:objectsInSection forKey:className];
}
}
- (PFObject *)objectAtIndexPath:(NSIndexPath *)indexPath
{
NSString *className = [self classForSection:indexPath.section];
NSArray *rowIndicesInSection = [self.sections objectForKey:className];
NSNumber *rowIndex = [rowIndicesInSection objectAtIndex:indexPath.row];
return [self.objects objectAtIndex:[rowIndex intValue]];
}
- (NSString *)classForSection:(NSInteger)section
{
return [self.sectionToClassMap objectForKey:[NSNumber numberWithInt:section]];
}
#end
When I look at the NSLog data, self.objects is empty. I know this is the reason why data isn't displayed, and would like some advice to sort this out please! Thanks.

UISearchBar issues Xcode 5

I am having issues with my UISearchBar that I have implemented. My app will compile and run, but as soon as I hit the search bar to begin typing a word in, it crashes. Can anyone tell me if you see anything wrong with my syntax? It is suppose to go through the states that I have in my NSArray.
TableViewController.h:
#import <UIKit/UIKit.h>
#interface TableViewController : UITableViewController <UISearchBarDelegate>
#property (nonatomic, strong) NSMutableArray *results;
#property (nonatomic, strong) IBOutlet UISearchBar *searchBar;
#end
TableViewController.m:
#import "TableViewController.h"
#import "ViewController.h"
#interface TableViewController ()
#end
#implementation TableViewController
{
NSArray *states;
}
- (NSMutableArray *)results
{
if (!_results)
{
_results = [[NSMutableArray alloc] init];
}
return _results;
}
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
states = [NSArray arrayWithObjects:#"Alabama", #"Georgia", #"Tennessee", #"Colorado", nil];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)searchThroughData
{
self.results = nil;
NSPredicate *resultsPredicate = [NSPredicate predicateWithFormat:#"SELF contains [search] $#", self.searchBar.text];
self.results = [[states filteredArrayUsingPredicate:resultsPredicate] mutableCopy];
}
- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText
{
[self searchThroughData];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if(tableView == self.tableView)
{
return [states count];
}
else
{
[self searchThroughData];
return self.results.count;
}
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (!cell)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
if(tableView == self.tableView)
{
cell.textLabel.text = [states objectAtIndex:indexPath.row];
}
else
{
cell.textLabel.text = self.results[indexPath.row];
}
return cell;
}
I am fairly new to Objective-C, so sorry if this is a simple question that I should know the answer to.
Thanks
The first line of your - (void)searchThroughData method sets the NSMutableArray to nil. This may be the problem.

Fetching Image from Parse class

Beginner here guys. I already managed to get the text from Parse class to table view. In the same class i have another column where I put the associated image file and somehow i could not get the image file. I will be glad if you can help me with this issue. Parse class name is News and the column i would like to get is imageFile. Here is my code.
.h file
#import <UIKit/UIKit.h>
#import <Parse/Parse.h>
#import "TableCell.h"
#interface ViewController : UIViewController <UITableViewDelegate> {
NSArray *events;
}
#property (weak, nonatomic) IBOutlet UITableView *newsTable;
#end
.m file
#import "ViewController.h"
#import "TableCell.h"
#interface ViewController ()
#end
#implementation ViewController
#synthesize newsTable;
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
[self performSelector: #selector(retreiveFromParse)];
}
- (void) retreiveFromParse {
PFQuery *retrieveEvents = [PFQuery queryWithClassName:#"News"];
[retrieveEvents findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
if (!error) {
events = [[NSArray alloc] initWithArray:objects];
}
[newsTable reloadData];
}];
}
//*********************Setup table of folder names ************************
//get number of sections in tableview
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
// Return the number of sections.
return 1;
}
//get number of rows by counting number of folders
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return events.count;
}
//setup cells in tableView
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
//setup cell
static NSString *CellIdentifier = #"EventCell";
TableCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
PFObject *tempObject = [events objectAtIndex:indexPath.row];
cell.TitleLabel.text = [tempObject objectForKey:#"Event"];
return cell;
}
//user selects folder to add tag to
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
NSLog(#"cell tapped");
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#end
My Cell.h
#import <UIKit/UIKit.h>
#import <Parse/Parse.h>
#interface TableCell : UITableViewCell
#property (strong, nonatomic) IBOutlet UILabel *TitleLabel;
#end
My cell.m
#import "TableCell.h"
#implementation TableCell
#synthesize TitleLabel;
- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
if (self) {
// Initialization code
}
return self;
}
- (void)setSelected:(BOOL)selected animated:(BOOL)animated
{
[super setSelected:selected animated:animated];
// Configure the view for the selected state
}
#end
Just after
PFObject *tempObject = [events objectAtIndex:indexPath.row];
cell.TitleLabel.text = [tempObject objectForKey:#"Event"];
Write below lines..
PFFile *imageFile = [tempObject objectForKey:#"image"];
PFImageView *imageView = [[PFImageView alloc] init];
imageView.file = imageFile;
[imageView loadInBackground:^(UIImage *img,NSError *error){
if(!error)
{
UIImageView *yourImageView = [[UIImageView alloc] init];
yourImageView.image = imageView.image;
/*OR*/
cell.imageView.image = imageView.image;
}
}];
This might get you going.
This will fetch the associated file and put it in cell.imageView, which is a PFImageView (the Parse edition of UIImageView):
PFObject *tempObject = [events objectAtIndex:indexPath.row];
cell.TitleLabel.text = [tempObject objectForKey:#"Event"];
PFFile *imageFile = [tempObject objectForKey:#"imageFile"];
if (imageFile) {
cell.imageView.file = imageFile;
[cell.imageView loadInBackground];
} else {
cell.imageView.image = [UIImage imageNamed:#"AvatarPlaceholder.png"];
}

Parse.com Textview don`t show anything

I want to add some non editable text(it`s some description of toys in my app) via parse and I am stuck with the code.
This part (I think) I should change, but don`t know how.
Thanks
I`ve got it already like this
- (void) retrieveFromParse {
PFQuery *retrieveColors = [PFQuery queryWithClassName:#"Hracky1"];
[retrieveColors findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
if (!error) {
colorsArray= [[NSArray alloc] initWithArray:objects];
}
[colorsTable reloadData];
}];
[self.colorsTable reloadData];
[self.refreshControl endRefreshing];
}
This is fully TableViewcontroller.m
#import "TableViewController.h"
#import "CustomCell.h"
#interface TableViewController (){
}
#end
#implementation TableViewController
#synthesize colorsTable;
- (void) retrieveFromParse {
PFQuery *retrieveColors = [PFQuery queryWithClassName:#"Hracky1"];
[retrieveColors findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
if (!error) {
colorsArray= [[NSArray alloc] initWithArray:objects];
}
[colorsTable reloadData];
}];
[self.colorsTable reloadData];
[self.refreshControl endRefreshing];
}
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
[self performSelector:#selector(retrieveFromParse)];
UIRefreshControl *refreshControl = [[UIRefreshControl alloc] init];
self.refreshControl = refreshControl;
[refreshControl addTarget:self action:#selector(retrieveFromParse)
forControlEvents:UIControlEventValueChanged];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#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 colorsArray.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"colorsCell";
CustomCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
PFObject *tempObject = [colorsArray objectAtIndex:indexPath.row];
[cell.imageview setFile: [tempObject objectForKey:#"ImageURL"]];
[cell.imageview loadInBackground];
cell.cellTitle.text = [tempObject objectForKey:#"cellTitle"];
cell.cellDescript.text = [tempObject objectForKey:#"cellDescript"];
return cell;
}
#end
DetailViewController.m
#import "DetailViewController.h"
#import "Parse/Parse.h"
#interface DetailViewController ()
#end
#implementation DetailViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
-(void)parseview
{
NSString *showText = _textdescript.text;
PFObject *addValues= [PFObject objectWithClassName:#"Hracky1"];
[addValues setObject: showText forKey:#"TextView"];
}
- (void)viewDidLoad
{
[super viewDidLoad];
[self performSelector:#selector(parseview)];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#end
DetailViewController.h
> #import <UIKit/UIKit.h>
>
> #interface DetailViewController : UIViewController
> <UITextViewDelegate>
>
> #property (nonatomic, strong) IBOutlet UITextView *textdescript; #end
Add a property to the second view controller. Set it when preparing the segue or creating the instance with the identifier.
This code:
- (void)parseview
{
NSString *showText = _textdescript.text;
PFObject *addValues= [PFObject objectWithClassName:#"Hracky1"];
[addValues setObject: showText forKey:#"TextView"];
}
is creating a new empty parse object and setting some text into it. The text is probably nil or #"" because you have only just loaded the view when this happens (though you may have some default text in the XIB).
Most likely that you should be doing is getting an object back from Parse and interrogating it to get the text, then set that onto the view:
PFQuery *query = [PFQuery queryWithClassName:#"Hracky1"];
PFObject *object = [query getFirstObject]; // synchronous request, not ideal, look at getFirstObjectInBackgroundWithBlock
_textdescript.text = [object valueForKey:#"TextView"];
Assuming that you have a class Hracky1 defined in Parse and that it has a string variable named TextView.

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