Predefine a specific twitter feed to display - objective-c

In the code below, a tableview displays the twitter feed of the user of the phone. All I want to do is display the feed of a user that I predefine in the code. I looked online but can't find any tutorials on this. I would like to edit this code instead of restarting with a third party API.
ViewController.m
#import "TwitterViewController.h"
#import <Accounts/Accounts.h>
#import <Social/Social.h>
#interface TwitterViewController ()
#property (strong, nonatomic) NSArray *twitterArray;
#end
#implementation TwitterViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
[self twitterTimeline];
// Do any additional setup after loading the view from its nib.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)twitterTimeline {
ACAccountStore *account = [[ACAccountStore alloc] init]; // Creates AccountStore object.
// Asks for the Twitter accounts configured on the device.
ACAccountType *accountType = [account accountTypeWithAccountTypeIdentifier:ACAccountTypeIdentifierTwitter];
[account requestAccessToAccountsWithType:accountType options:nil completion:^(BOOL granted, NSError *error)
{
// If we have access to the Twitter accounts configured on the device we will contact the Twitter API.
if (granted == YES){
NSArray *arrayOfAccounts = [account accountsWithAccountType:accountType]; // Retrieves an array of Twitter accounts configured on the device.
// If there is a leat one account we will contact the Twitter API.
if ([arrayOfAccounts count] > 0) {
ACAccount *twitterAccount = [arrayOfAccounts lastObject]; // Sets the last account on the device to the twitterAccount variable.
NSURL *requestAPI = [NSURL URLWithString:#"http://api.twitter.com/1.1/statuses/user_timeline.json"]; // API call that returns entires in a user's timeline.
// The requestAPI requires us to tell it how much data to return so we use a NSDictionary to set the 'count'.
NSMutableDictionary *parameters = [[NSMutableDictionary alloc] init];
[parameters setObject:#"100" forKey:#"count"];
[parameters setObject:#"1" forKey:#"include_entities"];
// This is where we are getting the data using SLRequest.
SLRequest *posts = [SLRequest requestForServiceType:SLServiceTypeTwitter requestMethod:SLRequestMethodGET URL:requestAPI parameters:parameters];
posts.account = twitterAccount;
// The postRequest: method call now accesses the NSData object returned.
[posts performRequestWithHandler:
^(NSData *response, NSHTTPURLResponse
*urlResponse, NSError *error)
{
// The NSJSONSerialization class is then used to parse the data returned and assign it to our array.
self.twitterArray = [NSJSONSerialization JSONObjectWithData:response options:NSJSONReadingMutableLeaves error:&error];
if (self.twitterArray.count != 0) {
dispatch_async(dispatch_get_main_queue(), ^{
[self.twitterFeedTable reloadData]; // Here we tell the table view to reload the data it just recieved.
});
}
}];
}
} else {
// Handle failure to get account access
NSLog(#"%#", [error localizedDescription]);
}
}];
}
#pragma mark Table View Data Source Mehtods
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
// Returns the number of rows for the table view using the array instance variable.
return [_twitterArray count];
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
// Creates each cell for the table view.
static NSString *cellID = #"CELLID" ;
UITableViewCell *cell = [self.twitterFeedTable dequeueReusableCellWithIdentifier:cellID];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellID];
}
// Creates an NSDictionary that holds the user's posts and then loads the data into each cell of the table view.
NSDictionary *tweet = _twitterArray[indexPath.row];
cell.textLabel.text = tweet[#"text"];
return cell;
}
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
// When a user selects a row this will deselect the row.
[self.twitterFeedTable deselectRowAtIndexPath:indexPath animated:YES];
}
#end

The information is here in the docs.
You need to add either a user_id parameter or a screen_name parameter to your http://api.twitter.com/1.1/statuses/user_timeline.json request, and that's all.
Example as provided in the documentation:
https://api.twitter.com/1.1/statuses/user_timeline.json?screen_name=twitterapi

Related

How to Get Duplicate Contact list iOS and merge or delete Contact?

I Want to Delete Duplicate or Merge duplicate Contact Can anyOne Provide me Sample Code for it !!!!!
I want to get the List of Duplicate Contact in tableview and merge them or delete them
I created sample project for you.I got the solution.it works perfectly.
Addressbook framework is deprecated from iOS 9.So we need to use Contact framework.
We must import Contact framework
Next in plist If you want to access contacts,you have to get
authorization permission so you need to add Privacy - Contacts Usage
Description
Key is Privacy - Contacts Usage Description
Type is string
Value is contact (whatever you want add here as string)
ViewController.h
#import <UIKit/UIKit.h>
#import <Contacts/Contacts.h>
#interface ViewController : UIViewController<UISearchBarDelegate,UITableViewDataSource,UITableViewDelegate>
#property (strong, nonatomic) IBOutlet UITableView *tblViewContact;
#end
ViewController.m
#import "ViewController.h"
#interface ViewController ()
{
NSMutableArray *arrData;
NSMutableArray *arraySearchContactData;
}
#end
#implementation ViewController
#synthesize tblViewContact;
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
arrData = [[NSMutableArray alloc]init];
[self getContact];
[tblViewContact registerClass:[UITableViewCell class] forCellReuseIdentifier:#"cell"];
}
//Get Contact and Authorization Access
-(void)getContact
{
// Request authorization to Contacts
CNContactStore *store = [[CNContactStore alloc] init];
[store requestAccessForEntityType:CNEntityTypeContacts completionHandler:^(BOOL granted, NSError * _Nullable error) {
if (granted == YES)
{
//keys with fetching properties
NSArray *keys = #[CNContactFamilyNameKey, CNContactGivenNameKey, CNContactPhoneNumbersKey, CNContactImageDataKey];
NSString *containerId = store.defaultContainerIdentifier;
NSPredicate *predicate = [CNContact predicateForContactsInContainerWithIdentifier:containerId];
NSError *error;
NSArray *cnContacts = [store unifiedContactsMatchingPredicate:predicate keysToFetch:keys error:&error];
if (error) {
NSLog(#"error fetching contacts %#", error);
} else {
NSString *phone;
NSString *fullName;
NSString *firstName;
NSString *lastName;
UIImage *profileImage;
NSMutableArray *contactNumbersArray = [[NSMutableArray alloc]init];
NSMutableArray *arrContacts = [[NSMutableArray alloc]init];
for (CNContact *contact in cnContacts)
{
// copy data to my custom Contacts class.
firstName = contact.givenName;
lastName = contact.familyName;
if (lastName == nil) {
fullName=[NSString stringWithFormat:#"%#",firstName];
}else if (firstName == nil){
fullName=[NSString stringWithFormat:#"%#",lastName];
}
else{
fullName=[NSString stringWithFormat:#"%# %#",firstName,lastName];
}
UIImage *image = [UIImage imageWithData:contact.imageData];
if (image != nil) {
profileImage = image;
}else{
profileImage = [UIImage imageNamed:#"person-icon.png"];
}
for (CNLabeledValue *label in contact.phoneNumbers)
{
phone = [label.value stringValue];
if ([phone length] > 0) {
[contactNumbersArray addObject:phone];
}
}
NSDictionary* personDict = [[NSDictionary alloc] initWithObjectsAndKeys: fullName,#"fullName",profileImage,#"userImage",phone,#"PhoneNumbers", nil];
[arrContacts addObject:[NSString stringWithFormat:#"%#",[personDict objectForKey:#"fullName"]]];
}
//Removing Duplicate Contacts from array
NSOrderedSet *orderedSet = [NSOrderedSet orderedSetWithArray:arrContacts];
NSArray *arrayWithoutDuplicates = [orderedSet array];
arrData = [arrayWithoutDuplicates mutableCopy];
NSLog(#"The contacts are - %#",arrData);
dispatch_async(dispatch_get_main_queue(), ^{
[tblViewContact reloadData];
});
}
}
}];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark - UITableView Data Source Methods
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return arrData.count;
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *strCell = #"cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:strCell];
if(cell==nil)
{
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:strCell];
}
cell.textLabel.text = arrData[indexPath.row];
return cell;
}
The Printed results For Contacts
The contacts are - (
"John Appleseed",
"Kate Bell",
"Anna Haro",
"Daniel Higgins",
"David Taylor",
"Hank Zakroff"
)
Screenshot below
When first you run the app
Now it shows contacts in table view

Populating Custom TableViewCell from Twitter using JSON Serialization

I am new to Objective-C. I spent countless hours being stuck on getting a blank tableview, I am desperate at this point.
I am loading twitter data through a JSON call, using their API. I store everything in a NSDictionary, run a for loop to select only "text" values. I store the filtered dictionary in an object which I later use in the TableView initialization.
I created a subclass of UItableViewCell for my custom cell.
My dataSources and delegates seem to be well connected as well (that is what I think at least)
I am having a hard time finding my problem. If someone could help me out please.
#import "ViewController.h"
#import "myCell.h"
#import <TwitterKit/TwitterKit.h>
#interface ViewController ()
#end
#implementation ViewController
#synthesize myTableView;
NSMutableArray *tweetObject;
NSDictionary *dictionary;
NSString *name;
NSString *text;
- (void)viewDidLoad {
tweetObject = [[NSMutableArray alloc] init];
[super viewDidLoad];
self.myTableView.dataSource = self;
self.myTableView.delegate = self;
text = #"text";
[[Twitter sharedInstance] logInGuestWithCompletion:^(TWTRGuestSession *guestSession, NSError *error) {
if (guestSession) {
// make API calls that do not require user auth
NSString *statusesShowEndpoint = #"https://api.twitter.com/1.1/statuses/user_timeline.json?screen_name=goofernator";
NSError *clientError;
NSURLRequest *request = [[[Twitter sharedInstance] APIClient]
URLRequestWithMethod:#"GET"
URL:statusesShowEndpoint
parameters:0
error:&clientError];
if (request) {
[[[Twitter sharedInstance] APIClient]
sendTwitterRequest:request
completion:^(NSURLResponse *response,
NSData *data,
NSError *connectionError) {
if (data) {
// handle the response data e.g.
NSError *jsonError;
NSDictionary *json = [NSJSONSerialization
JSONObjectWithData:data
options:0
error:&jsonError];
for (NSDictionary *dataDict in json) {
NSString *text = [dataDict valueForKeyPath: #"text"];
dictionary = [NSDictionary dictionaryWithObjectsAndKeys:text,#"bodytext",nil];
[tweetObject addObject:dictionary];
}
}
else {
NSLog(#"Error: %#", connectionError);
}
}];
}
else {
NSLog(#"Error: %#", clientError);
}
} else {
NSLog(#"error: %#", [error localizedDescription]);
}
}];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return tweetObject.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"Cell";
myCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell=[[myCell alloc]initWithStyle:
UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
}
NSDictionary *tmpDict = [self.tweetObject objectAtIndex:indexPath.row];
cell.txtLblOutput.text = [tmpDict objectForKey:text];
[tableView reloadData];
return cell;
}
#end
Here you can see the way my storyboard is put together and the references I am using
http://postimg.org/image/79w7pqmu3/
http://postimg.org/image/ixq9kabyz/
You should call [tableView reloadData]; in your request completion handler, after you've filled your array. Check if you receive any data. Does the array get filled with dictionary objects?
But mate, seriously, you need to read some good books about coding, your code really lacks understanding of what you're doing. Please, remove [tableView reloadData]; from the - ...cellForRowAtIndexPath:... method.

TableView Controller using JSON NSURL

Good afternoon,
I'm trying to use a TableView Controller to display X number of items from my MySQL database but I'm a little bit lost at the moment.
I have another project where I can show the data using JSON output data, but I don't know how to add that code to my project in order to show the data from my database. That's the code I used:
#implementation HomeModel
- (void)downloadItems
{
// Download the json file
NSURL *jsonFileUrl = [NSURL URLWithString:#"http://website.com/service.php"];
// Create the request
NSURLRequest *urlRequest = [[NSURLRequest alloc] initWithURL:jsonFileUrl];
// Create the NSURLConnection
[NSURLConnection connectionWithRequest:urlRequest delegate:self];
}
#pragma mark NSURLConnectionDataProtocol Methods
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
// Initialize the data object
_downloadedData = [[NSMutableData alloc] init];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
// Append the newly downloaded data
[_downloadedData appendData:data];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
// Create an array to store the locations
NSMutableArray *_locations = [[NSMutableArray alloc] init];
// Parse the JSON that came in
NSError *error;
NSArray *jsonArray = [NSJSONSerialization JSONObjectWithData:_downloadedData options:NSJSONReadingAllowFragments error:&error];
// Loop through Json objects, create question objects and add them to our questions array
for (int i = 0; i < jsonArray.count; i++)
{
NSDictionary *jsonElement = jsonArray[i];
// Create a new location object and set its props to JsonElement properties
Location *newLocation = [[Location alloc] init];
newLocation.name = jsonElement[#"user"];
newLocation.address = jsonElement[#"imagen"];
newLocation.latitude = jsonElement[#"date"];
// Add this question to the locations array
[_locations addObject:newLocation];
}
// Ready to notify delegate that data is ready and pass back items
if (self.delegate)
{
[self.delegate itemsDownloaded:_locations];
}
}
#end
Currently that's my code:
TableViewController.m
#import "CarTableViewController.h"
#import "CarTableViewCell.h"
#import "CarTableViewController.h"
#import "CarDetailViewController.h"
#implementation CarTableViewController
#synthesize carMakes = _carMakes;
#synthesize carModels = _carModels;
#synthesize carImages = _carImages;
- (void)viewDidLoad
{
[super viewDidLoad];
self.carMakes = [[NSArray alloc]
initWithObjects:#"Chevy",
#"BMW",
#"Toyota",
#"Volvo",
#"Smart", nil];
self.carModels = [[NSArray alloc]
initWithObjects:#"Volt",
#"Mini",
#"Venza",
#"S60",
#"Fortwo", nil];
self.carImages = [[NSArray alloc]
initWithObjects:#"chevy_volt.jpg",
#"mini_clubman.jpg",
#"toyota_venza.jpg",
#"volvo_s60.jpg",
#"smart_fortwo.jpg", nil];
}
- (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.carModels count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"carTableCell";
CarTableViewCell *cell = [tableView
dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[CarTableViewCell alloc]
initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:CellIdentifier];
}
// Configure the cell...
cell.makeLabel.text = [self.carMakes
objectAtIndex: [indexPath row]];
cell.modelLabel.text = [self.carModels
objectAtIndex:[indexPath row]];
UIImage *carPhoto = [UIImage imageNamed:
[self.carImages objectAtIndex: [indexPath row]]];
cell.carImage.image = carPhoto;
return cell;
}
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([[segue identifier] isEqualToString:#"ShowCarDetails"])
{
CarDetailViewController *detailViewController =
[segue destinationViewController];
NSIndexPath *myIndexPath = [self.tableView
indexPathForSelectedRow];
detailViewController.carDetailModel = [[NSArray alloc]
initWithObjects: [self.carMakes
objectAtIndex:[myIndexPath row]],
[self.carModels objectAtIndex:[myIndexPath row]],
[self.carImages objectAtIndex:[myIndexPath row]],
nil];
}
}
#end
TableViewController.h
#import <UIKit/UIKit.h>
#interface CarTableViewController : UITableViewController
#property (nonatomic, strong) NSArray *carImages;
#property (nonatomic, strong) NSArray *carMakes;
#property (nonatomic, strong) NSArray *carModels;
#end
How can I add the first code (results from my database) to the other project? I'm lost at the moment and I will appreciate a lot if you can give me some light on this problem, because I want to edit the info from the storyboard as I have in the second project.
Thanks in advance.
Regards.
Thanks in advance.
It's because you don't connect to your database directly from your iphone. In general ou have a web service (also call API) for expose your data (in JSON format for example). So you have to build an API, in PHP, Ruby or Node, for expose the data of your database and access it.
EDIT:
What i see is in your HomeModel, you can set a delegate, this delegate have a function itemsDownloaded where you pass the data get from your API.
So you want your CarTableViewController to be that delegate for receive those data.
First you have to have an object HomeModel, in your TableViewController.h add:
#property (strong, nonatomic) HomeModel *homeModel;
Now you have to call the code that get the data from your server. Something like
- (void)viewDidLoad
{
[super viewDidLoad];
homeModel = [HomeModel new];
homeModel.delegate = self;
[homeModel downloadItems];
}
And finally you have to implement itemsDownloaded in your CarTableViewController. Do something like this:
- (void)itemsDownloaded:(NSArray *)items
{
self.carMakes = items; // Problem here
[self.tableView reloadData];
}
But the problem is HomeModel parse something different from what you have in carMakes, you have to adapt the Loop through Json objects in HomeModel.
You may wanna try AFNetworking which is a library easier to use than NSURLConnection.

Dispatch Queue and global NSMutableDictionary - Objective C

I'm trying to use a global NSMutableDictionary from a dispatch queue. However, the items keep coming back NULL.
What I'm trying to do is access an external json file with a dispatch_queue, then populate a UITableView with this info.
Here's what I have
vc.h:
#interface viewcontroller {
NSMutableDictionary *jsonArray;
}
vc.m:
#define kBgQueue dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0) //1
#define jsonTest [NSURL URLWithString:#"http://www.sometest.com/test.php"]
-(void)viewDidLoad {
dispatch_async(kBgQueue, ^{
NSData* data = [NSData dataWithContentsOfURL:
jsonTest];
[self performSelectorOnMainThread:#selector(fetchedData:)
withObject:data waitUntilDone:YES];
// if I run the log here, I can access jsonArry and the log prints correctly
NSLog(#"City: %#", [jsonArray objectForKey:#"city"];
});
}
-(NSMutableDictionary *)fetchedData:(NSData *)responseData {
NSError *error;
jsonArray = [NSJSONSerialization JSONObjectWithData:responseData options:kNilOptions error:&error];
return jsonArray;
}
/********************* Table formatting area **********************/
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if (tableView == self.ipTable) {
if ([ipArray count] == 0){
return 1;
} else { // meta table
return [ipArray count];
}
} else { // IP Meta Data
return [jsonArray count];
}
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
if (tableView == self.myTable) {
NSString *CellIdentifier = NULL;
if ([ipArray count] == 0) {
CellIdentifier = #"No Cells";
} else {
CellIdentifier = #"IP Cell";
}
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
if ([ipArray count] == 0)
{
[cell.textLabel setText:NSLocalizedString(#"None Found", nil)];
return cell;
} else {
IPAddr *theip = [ipArray objectAtIndex: [indexPath row]];
NSString *theipname = [theip ipName];
if ([theipname isEqualToString:#""]) {
[cell.textLabel setText: [theip ipNum]];
[cell.detailTextLabel setText:NSLocalizedString(#"noName", nil)];
} else {
[cell.textLabel setText: [theip ipName]];
[cell.detailTextLabel setText: [theip ipNum]];
}
return cell;
}
} else { // meta table
static NSString *CellIdentifier = #"metaCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
// jsonArray content would go here to fill the cells.
/******************** something here to fill the cells using jsonArray ********************/
return cell;
}
} // END UITAbleViewCell
If I access the jsonArray inside the queue, it returns fine and prints the log for the city.
However, if I try to use it outside the queue, it returns NULL.
I'm trying to figure out what is happening, any ideas?
I need to use jsonArray in different methods in the same view, so I need it to be global.
I am fairly sure that the problem is that the data source methods (numberOfRowsInSection,
cellForRowAtIndexPath) are called before the background thread has finished and
filled the jsonArray. Therefore you have to reload the table view when the background
thread has finished:
- (void)viewDidLoad
{
[super viewDidLoad];
dispatch_async(kBgQueue, ^{
NSData *data = [NSData dataWithContentsOfURL:jsonTest];
NSError *error;
NSArray *tmpArray = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
dispatch_sync(dispatch_get_main_queue(), ^{
// Assign new data to data source and reload the table view:
jsonArray = tmpArray;
[self.metaTableView reloadData];
});
});
}
So the table view would be empty initially, and reloaded later when the data has
arrived.
Try to call the other method(which is using your jsonarray) through nsnotification...I am not sure there might some other ideas/ways of doing this.But i am presenting what i have in my mind.
Put this code inside your fetchedData method,
NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
[nc addObserver:self selector:#selector(someMethod:) name:#"JSonDownloaded" object: jsonArray];
[[NSNotificationCenter defaultCenter] postNotificationName:#"JSonDownloaded" object: jsonArray];
-(void)someMethod:(NSNotification *)nspk
{
NSLog(#"%#",nspk.object);
//Only after this you can able to access the jsonArray.
}
Don't forget to unregister the observer.
jsonArray is just an instance variable, but not a property. Thus, assigning an object to it does not retain it, and the object may be released as soon as the program returns to the run loop.
I suggest replacing the iVar by #property (strong) NSMutableDictionary *jsonArray; and #synthesize jsonArray;, and assigning the object to it by self.jsonArray = ...
EDIT (see comment of Martin R below):
Thus, if you are not using ARC, assigning an object to it does not retain it, and the object may be released as soon as the program returns to the run loop.
In this case, I suggest replacing the iVar by #property (retain) NSMutableDictionary *jsonArray; and #synthesize jsonArray;, and assigning the object to it by self.jsonArray = ...

How to make my UITableViewCell not just have a title and a subtitle, but a title, subtitle (date), and another label (summary)?

Trying to make an my RSS Feed app have the summary inside the label, I have parsed the description (summary), but I don't understand how to add it in the UITableViewCell. I am currently using UITableViewCellStyleSubtitle, so I can show the title of each post and the date below it. How do I add one more below it to show summary of each post?
MasterViewController.h (TableView Header)
#import <UIKit/UIKit.h>
#class RSSChannel;
#class WebViewController;
#interface MasterViewController : UITableViewController
<NSXMLParserDelegate>
{
NSURLConnection *connection;
NSMutableData *xmlData;
RSSChannel *channel;
}
- (void)fetchEntries;
#property (nonatomic, strong) WebViewController *webViewController;
#end
MasterViewController.m (TableView Implementation)
#import "MasterViewController.h"
#import "RSSChannel.h"
#import "RSSItem.h"
#import "WebViewController.h"
#interface MasterViewController () {
NSMutableArray *_objects;
}
#end
#implementation MasterViewController
#synthesize webViewController;
- (void)awakeFromNib
{
[super awakeFromNib];
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
[self fetchEntries];
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (void)insertNewObject:(id)sender
{
if (!_objects) {
_objects = [[NSMutableArray alloc] init];
}
[_objects insertObject:[NSDate date] atIndex:0];
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0];
[self.tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
}
#pragma mark - Table View
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
NSLog(#"The amount of items in the table: %u", [[channel items] count]);
return [[channel items] count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView
dequeueReusableCellWithIdentifier:#"UITableViewCell"];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle
reuseIdentifier:#"UITableViewCell"];
}
RSSItem *item = [[channel items] objectAtIndex:[indexPath row]];
[[cell textLabel] setText:[item title]];
[[cell detailTextLabel] setText:[item date]];
return cell;
}
- (void)fetchEntries
{
// Create a new data container for the stuff that comes back from the service
xmlData = [[NSMutableData alloc] init];
// Construct a URL that will ask the service for what you want -
// Note we can concatenate literal strings together on multiple lines in this way it
// results in a single NSString instance
NSURL *url = [NSURL URLWithString:
#"http://sephardijews.com/feed/"];
// Putting the URL we made into an NSURLRequest, so we can connect to the url data that we specifed
NSURLRequest *req = [NSURLRequest requestWithURL:url];
// Creating a connecting that will exchange this request for the data from the URL we specifed
connection = [[NSURLConnection alloc] initWithRequest:req
delegate:self
startImmediately:YES];
}
- (void)parser:(NSXMLParser *)parser
didStartElement:(NSString *)elementName
namespaceURI:(NSString *)namespaceURI
qualifiedName:(NSString *)qualifedName
attributes:(NSDictionary *)attributeDict
{
NSLog(#"%# found a %# element", self, elementName);
if ([elementName isEqual:#"channel"]) {
// If the parser saw a channel, create new instance, store in our ivar
channel = [[RSSChannel alloc] init];
// Give the channel object a pointer back to ourselves for later
[channel setParentParserDelegate:self];
// Set the parser's delegate to the channel object
[parser setDelegate:channel];
}
}
// Method used to start at the beginning of the instance of the tableview, it will intialize the connection method to retrieve the posts from the URL
/* - (id) initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
[self fetchEntries];
}
return self;
}
*/
// This method will be called several times as the data arrives
- (void)connection:(NSURLConnection *)conn didReceiveData:(NSData *)data
{
// Add the incoming chunk of data to the container we are keeping
// The data always comes in the correct order
[xmlData appendData:data];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)conn
{
// Create the parser object with the data received from the web service
NSXMLParser *parser = [[NSXMLParser alloc] initWithData:xmlData];
// Give it a delegate - don't worry about the warning
[parser setDelegate:self];
// Tell it to start parsing - the documet will be parsed and the delegate of NSXMLParser will get all of its delegate messages sent to it before this line finishes execution - it is blocking
[parser parse];
// Get rid of the XML data as we no longer need it
xmlData = nil;
// Get rid of the connection, no longer need it
connection = nil;
// Reload the table
[[self tableView] reloadData];
NSLog(#"%#\n %#\n %#\n", channel, [channel title], [channel infoString]);
}
- (void)connection:(NSURLConnection *)conn didFailWithError:(NSError *)error
{
// Release the connection object, we are done with it cause' there is no connection
// Setting the connection to nil will stop the connection because it is nothing/0
connection = nil;
// Release the xmlData object. We stopped to connection to put the data in the xmlData object, so we set it to nil also
xmlData = nil;
// Grab the description of the error object passed to us, so we can tell the user
NSString *errorString = [NSString stringWithFormat:#"Fetch failed: %#", [error localizedDescription]];
// Create and show an alert view to the user with the error string to tell them the error in the process of the connection
UIAlertView *av = [[UIAlertView alloc] initWithTitle:#"Error"
message:errorString
delegate:nil
cancelButtonTitle:#"OK"
otherButtonTitles:nil];
[av show];
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
// Push the web view controller onto the navigation stack - this implicitly
// creates the web view controller's view the first time through
[[self navigationController] pushViewController:webViewController animated:YES];
//Grab the selected item
RSSItem *entry = [[channel items] objectAtIndex:[indexPath row]];
//Constructs a URL with the link string of the item
NSURL *url = [NSURL URLWithString:[entry link]];
// Construct a request object with that URL
NSURLRequest *req = [NSURLRequest requestWithURL:url];
// Load the request into the web view
[[webViewController webView] loadRequest:req];
// Set the title of the web view controller's navifation item
[[webViewController navigationItem] setTitle:[entry title]];
}
/*
// Override to support rearranging the table view.
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath
{
}
*/
/*
// Override to support conditional rearranging of the table view.
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the item to be re-orderable.
return YES;
}
*/
#end
Try changing the UITableViewCellStyle to custom and dragging in your own UITextLabel objects to the prototype cell. Make #propertys for each of your data items in your TableViewController...
#interface MasterViewController ()
NSMutableArray *_objects;
#property (nonatomic, strong) IBOutlet UILabel *title;
#property (nonatomic, strong) IBOutlet UILabel *date;
#property (nonatomic, strong) IBOutlet UILabel *summary;
#end
Then connect the UITextLabels to their respective data.