I have an NSArray that contains a couple of items. The NSArray is loaded into a uitableview from another class. when I back out of the detail view and re-enter (for the 3rd time), the NSArray is empty and the tableview is empty as well. What is happening? (I am using arc so I don't think it is a leak)
- (void)viewDidLoad {
myMatch = [[Match alloc] initWithId:1 OpponentId:13];
}
- (UITableViewCell *)tableView:(UITableView *)tv cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *askCellIdent = #"askCell";
static NSString *answerCellIdent = #"answerCell";
if (indexPath.row == 0)
{
AskCell *cell = [tv dequeueReusableCellWithIdentifier:askCellIdent];
if (cell==nil) {
cell = [[AskCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:askCellIdent];
}
cell.nameLabel.text = #"Albert asked:";
cell.questionLabel.text = [NSString stringWithFormat:#"%#", [[myMatch.chat objectAtIndex:indexPath.row] objectAtIndex:1]];
return cell;
}
if (indexPath.row == 1)
{
AnswerCell *cell = [tv dequeueReusableCellWithIdentifier:answerCellIdent];
if (cell==nil) {
cell = [[AnswerCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:answerCellIdent];
}
cell.nameLabel.text = #"Hugh answered:";
cell.answerLabel.text = [NSString stringWithFormat:#"%#", [[myMatch.chat objectAtIndex:indexPath.row] objectAtIndex:1]];
return cell;
}
}
Here is the init code of the my match class:
- (id) initWithId:(NSInteger)yourId OpponentId:(NSInteger)opId {
self = [super init];
if (self != nil) {
//set your id and opponents id to the match.
[self setUserId:yourId];
[self setUserId:opId];
JSON = #"[{\"opponentId\":\"4\",\"chat\":[[\"1\",\"Does he have a beard?\"],[\"1\",\"No.\"]]}]";
//initiate the chat array.
chat = [[NSMutableArray alloc] init ];
[self loadMatch];
}
return self;
}
and here is the chat property/synthesize
NSMutableArray *chat;
#property (nonatomic, retain) NSMutableArray *chat;
#synthesize chat;
No idea whats going on, because the slog of the array is empty too!
Declare an int varable repeatCount in appDelegate
- (void)viewDidLoad
{
[super viewDidLoad];
ypurAppDelegate *appDelegate = (yourAppDelegate *)[[UIApplication sharedApplication] elegate];
appDelegate.repeatCount++;
if(appDelegate.repeatCount %3==0)
{
[array removeAllObjects];
[tableview reloaddata];
}
}
Use self.chat = [[[NSMutableArray alloc] init ]autorelease]; to initialize your array
Instead ViewDidLoad, allocate the object in initWithCoder.
- (void)viewDidLoad
{
[super viewDidLoad];
}
-(id)initWithCoder:(NSCoder *)aDecoder
{
self = [super initWithCoder:aDecoder];
if( self )
{
myMatch = [[Match alloc] initWithId:1 OpponentId:13];
}
return self;
}
I think it's a problem with the populating the NSMutableArray as only once will viewDidLoad will be called. You should insert values into array in viewWillAppear Method or initiate the match class in initWithCoder.
Related
In my iphone design, there are two table views added.
One table view is for displaying the MenuList for hotels using NsDictionary(Like Veg. NonVeg, Beverages..) and the other table view is for displaying the ListItems(Like In veg, i will Have Paneer,Rotti..) . When ever a menuList cell is selected the files inside the selected list needs to to be displayed in the other table view(ListIems).
My problem is
I am confused about
I want to use NsDictionary Alone in this two table . Can anyone give me a simple code for this. i am confused and am a fresher. Thanks In advance if someone teaches me. Please help. iam using xcode5
#interface TableViewController ()
#end
#implementation TableViewController
#synthesize menuDict ;
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
menuName = [NSArray arrayWithObjects:#"Veg", #"NonVeg", #"Beverages", nil];
menuId = [NSArray arrayWithObjects:#"1", #"2", #"3", nil];
self.menuDict = [NSDictionary dictionaryWithObjects:menuName
forKeys:menuId];
}
- (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 [[self.menuDict allKeys] count];
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *unifiedID = #"TableCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:unifiedID];
if (!cell) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:unifiedID];
}
for (id key in self.menuDict) {
NSLog(#"key: %#, value: %#", key, [self.menuDict objectForKey:key]);
}
NSString *key = [self.menuDict allKeys][indexPath.row];
NSString *menuNameString = self.menuDict[key];
NSString *menuIdString = key;
cell.textLabel.text = menuNameString;
cell.detailTextLabel.text = menuIdString;
return cell;
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if([[segue identifier] isEqualToString:#"ShowDetails"])
{
NSDictionary *vvegDict = [[NSDictionary alloc]initWithObjectsAndKeys:#"1",#"Rotti" , #"2", #"Panner", nil] ;
DetailTableViewController *tvc = segue.destinationViewController ;
tvc.vegDict =vvegDict ;
}
}
second table :
// Is this right to declare the lists here same as my first table. Please help me in this one.
#interface DetailTableViewController ()
#end
#implementation DetailTableViewController
#synthesize vegName,vegId ;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
vegName = [NSArray arrayWithObjects:#"Rotti", #"Panneer", #"Chappathi", nil];
vegId = [NSArray arrayWithObjects:#"1", #"2", #"3", nil];
self.vegDict = [NSDictionary dictionaryWithObjects:vegName
forKeys:vegId];
// Do any additional setup after loading the view.
}
- (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 [[self.vegDict allKeys]count] ;
return 1 ;
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *unifiedID = #"aCellID";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:unifiedID];
if (!cell) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:unifiedID];
}
for (id key in self.vegDict) {
NSLog(#"key: %#, value: %#", key, [self.vegDict objectForKey:key]);
}
NSString *key = [self.vegDict allKeys][indexPath.row];
NSString *vegNameString = self.vegDict[key];
NSString *vegIdString = key;
cell.textLabel.text = vegNameString;
cell.detailTextLabel.text = vegIdString;
return cell;
}
If you are using Segues to go from one uitableviewcontroller to other then you can use
-prepareForSegue:sender:
in this method you can set an NSDictionary property in the destination view controller. You can get the the destination view controller from the the sender argument.
I'm querying from parse and I when I try to search using the search bar it returns with "no results." I'm trying to figure out what I did wrong showing the objects because it does show in the NSLog that it has found objects.
My viewDidLoad:
- (void)viewDidLoad
{
[super viewDidLoad];
self.searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 44)];
self.tableView.tableHeaderView = self.searchBar;
self.searchController = [[UISearchDisplayController alloc] initWithSearchBar:self.searchBar contentsController:self];
self.searchController.searchResultsDataSource = self;
self.searchController.searchResultsDelegate = self;
self.searchController.delegate = self;
self.searchResults = [NSMutableArray array];
// Uncomment the following line to preserve selection between presentations.
// self.clearsSelectionOnViewWillAppear = NO;
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem;
}
The Retrieving for the Table View:
-(void)filterResults:(NSString *)searchTerm {
[self.searchResults removeAllObjects];
PFQuery *query = [PFQuery queryWithClassName:#"New"];
[query whereKeyExists:#"title"]; //this is based on whatever query you are trying to accomplish
[query whereKey:#"title" containsString:searchTerm];
NSArray *results = [query findObjects];
NSLog(#"%u", results.count);
[self.searchResults addObjectsFromArray:results];
}
Finally, The tableview cell that doesn't want to work:
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath object:(PFObject *)object {
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
PFObject * testObject = [self.searchResults objectAtIndex:indexPath.row];
cell.textLabel.text = [testObject objectForKey:#"title"];
return cell;
}
Then:
-(BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString {
[self filterResults:searchString];
return YES;
}
Then to load from Parse to UTTableview:
- (id)initWithCoder:(NSCoder *)aDecoder
{
self = [super initWithClassName:#"New"];
self = [super initWithCoder:aDecoder];
if (self) {
// The className to query on
self.ClassName = #"New";
//self.textKey = #"title";
// The key of the PFObject to display in the label of the default cell style
// self.keyToDisplay = #"text";
// Whether the built-in pull-to-refresh is enabled
self.pullToRefreshEnabled = NO;
// Whether the built-in pagination is enabled
self.paginationEnabled = YES;
self.loadingViewEnabled = NO;
// The number of objects to show per page
self.objectsPerPage = 50;
}
return self;
}
You can use another way where you can take the help of the search bar delegate method.
e.g - Include UISearchBarDelegate in your header file and also -
#property (strong, nonatomic) IBOutlet UISearchBar *searchSong;
Now in your .m file
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar
{
NSMutableArray *temp = [[NSMutableArray alloc] init];
temp = [self searchSongsData:self.searchSong.text from:`YourArray`];
}
+ (NSMutableArray *) searchSongsData:(NSString *)searchtext from:(NSMutableArray *)array
{
NSMutableArray *arrayToBeReturned = [[NSMutableArray alloc] init];
NSArray *temp = [[NSArray alloc] initWithArray:array];
NSString *textToBeSearch = [searchtext lowercaseString];
SongsMoviesData *songs;
for(int i = 0; i<temp.count; i++)
{
songs = [temp objectAtIndex:i];
NSString *string1 = [songs.song_title lowercaseString];
NSString *string2 = [songs.moview_name lowercaseString];
NSString *string3 = [songs.singer_name lowercaseString];
if ([string1 rangeOfString:textToBeSearch].location != NSNotFound ||[string2 rangeOfString:textToBeSearch].location != NSNotFound || [string3 rangeOfString:textToBeSearch].location != NSNotFound)
{
// NSLog(#"%#", songs.moview_name);
[arrayToBeReturned addObject:songs];
}
}
return arrayToBeReturned;
}
and like this you save this array in your search results.
I have a uitableview that's displaying multiple selections with a custom checkmark. When selected the rows value is save using NSUserDefaults. The problem is that despite the values being saved the checkmarks disappear from the table cell rows. I can't figure out why.
thanks for any help, I'm really stuck on this.
Here's the .h code:
#interface CategoriesViewController : UITableViewController {
NSString *selectedCategoryTableString;
NSString *jsonStringCategory;
int prev;
}
// arForTable array will hold the JSON results from the api
#property (nonatomic, retain) NSArray *arForTable;
#property (nonatomic, retain) NSMutableArray *arForIPs;
#property (nonatomic, retain) NSMutableArray *categorySelected;
#property (nonatomic, retain) NSString *jsonStringCategory;
#property(nonatomic, retain) UIView *accessoryView;
#end
and the .m code:
#implementation CategoriesViewController
#synthesize jsonStringCategory;
#synthesize arForTable = _arForTable;
#synthesize arForIPs = _arForIPs;
- (void)viewDidLoad
{
[super viewDidLoad];
self.arForIPs=[NSMutableArray array];
self.categorySelected = [[NSMutableArray alloc] init];
[self reloadMain];
self.tableView.allowsMultipleSelection = YES;
}
-(void) reloadMain {
jsonString = #"http:///******";
// Download the JSON
NSString *jsonString = [NSString
stringWithContentsOfURL:[NSURL URLWithString:jsonString]
encoding:NSStringEncodingConversionAllowLossy|NSUTF8StringEncoding
error:nil];
NSMutableArray *itemsTMP = [[NSMutableArray alloc] init];
// Create parser
SBJSON *parser = [[SBJSON alloc] init];
NSDictionary *results = [parser objectWithString:jsonString error:nil];
itemsTMP = [results objectForKey:#"results"];
self.arForTable = [itemsTMP copy];
[self.tableView reloadData];
}
#pragma mark - Table view data source
- (int)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (int)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [self.arForTable count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
[cell.textLabel setFont:[UIFont fontWithName: #"Asap-Bold" size: 14.0f]];
[cell.detailTextLabel setFont:[UIFont fontWithName: #"Asap-Bold" size: 14.0f]];
cell.accessoryView.hidden = NO;
}
UIImageView *cellAccessoryImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"icon-tick.png"]] ;
UIImageView *cellAccessoryNoneImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#""]] ;
if([self.arForIPs containsObject:indexPath]){
cell.accessoryView = cellAccessoryImageView;
} else {
cell.accessoryView = cellAccessoryNoneImageView;
}
// Get item from tableData
NSDictionary *item = (NSDictionary *)[_arForTable objectAtIndex:indexPath.row];
// encoding fix
NSString *utf8StringTitle = [item objectForKey:#"name"];
NSString *correctStringTitle = [NSString stringWithCString:[utf8StringTitle cStringUsingEncoding:NSISOLatin1StringEncoding] encoding:NSUTF8StringEncoding];
cell.textLabel.text = [correctStringTitle capitalizedString];
NSNumber *num = [item objectForKey:#"id"];
cell.detailTextLabel.text = [num stringValue];
cell.detailTextLabel.hidden = YES;
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
[tableView deselectRowAtIndexPath:indexPath animated:YES];
if([self.arForIPs containsObject:indexPath]){
[self.arForIPs removeObject:indexPath];
[self.categorySelected removeObject:[[self.arForTable objectAtIndex:indexPath.row] objectForKey:#"id"]];
} else {
[self.arForIPs addObject:indexPath];
[self.categorySelected addObject:[[self.arForTable objectAtIndex:indexPath.row] objectForKey:#"id"]];
NSLog(#"%# categorySelected",self.categorySelected);
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
NSLog(#"%# defaults categorySelected",[defaults arrayForKey:#"selectedCategoryTableString"]);
NSString *string = [self.categorySelected componentsJoinedByString:#","];
[defaults setObject:string forKey:#"selectedCategoryTableString"];
NSLog(#"%# STRING",string);
}
[tableView reloadData];
}
-(void) viewWillAppear:(BOOL)animated {
[super viewWillAppear:NO];
[self.navigationController setNavigationBarHidden:YES animated:NO];
self.navigationController.toolbarHidden = YES;
}
First of all your code has lots of memory leaks, please do use the static analyzer and/or instruments to fix them, few for them are pretty obvious like you initialized the SBJSON parser and did not release it, itemsTMP is another.
I have rewritten your code to be much more efficient and memory friendly:
#interface CategoriesViewController : UITableViewController
{
NSArray *_items;
NSMutableArray *_selectedItems;
UIImageView *cellAccessoryImageView;
}
#end
#implementation CategoriesViewController
- (void)viewDidLoad
{
[super viewDidLoad];
_selectedItems = [NSMutableArray new];
cellAccessoryImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"icon-tick.png"]] ;
[self reloadMain];
self.tableView.allowsMultipleSelection = YES;
}
- (void)reloadMain
{
NSString *jsonString = #"http:///******";
// Download the JSON
jsonString = [NSString
stringWithContentsOfURL:[NSURL URLWithString:jsonString]
encoding:NSStringEncodingConversionAllowLossy|NSUTF8StringEncoding
error:nil];
// Create parser
SBJSON *parser = [SBJSON new];
NSDictionary *results = [parser objectWithString:jsonString error:nil];
if (_items) [_items release];
_items = [[results objectForKey:#"results"] copy];
[parser release];
[self.tableView reloadData];
}
#pragma mark - Table view data source
- (int)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (int)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [_items count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
[cell.textLabel setFont:[UIFont fontWithName: #"Asap-Bold" size: 14.0f]];
[cell.detailTextLabel setFont:[UIFont fontWithName: #"Asap-Bold" size: 14.0f]];
cell.accessoryView.hidden = NO;
}
NSDictionary *item = [_items objectAtIndex:indexPath.row];
if ([_selectedItems containsObject:item])
{
// preloaded image will help you have smoother scrolling
cell.accessoryView = cellAccessoryImageView;
}
else
{
cell.accessoryView = nil;
cell.accessoryType = UITableViewCellAccessoryNone;
}
// Get item from tableData
cell.textLabel.text = [[NSString stringWithCString:[[item objectForKey:#"name"] cStringUsingEncoding:NSISOLatin1StringEncoding] encoding:NSUTF8StringEncoding] capitalizedString];
cell.detailTextLabel.text = [[item objectForKey:#"id"] stringValue];
cell.detailTextLabel.hidden = YES;
item = nil;
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[tableView deselectRowAtIndexPath:indexPath animated:YES];
NSDictionary *item = [_items objectAtIndex:indexPath.row];
if ([_selectedItems containsObject:item])
{
[_selectedItems removeObject:item];
}
else
{
[_selectedItems addObject:item];
}
item = nil;
[tableView reloadRowsAtIndexPaths:#[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
}
- (void)dealloc
{
[_selectedItems release];
[cellAccessoryImageView release];
[super dealloc];
}
#end
Since in your table there is only one section. Try this approach and this will help you certainly.
In - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath write following code;
if([self.arForIPs containsObject:[NSNumber numberWithInt:indexPath.row]]){
cell.accessoryView = cellAccessoryImageView;
} else {
cell.accessoryView = cellAccessoryNoneImageView;
}
And in - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath write code as below,
if([self.arForIPs containsObject:[NSNumber numberWithInt:indexPath.row]]){
[self.arForIPs removeObject:[NSNumber numberWithInt:indexPath.row]];
} else {
[self.arForIPs addObject:[NSNumber numberWithInt:indexPath.row]]
}
I have a subview in which I build a UITableview, I've set the delegate and datasource to the subview but for some reason the table methods are not being called...can someone look over my code and see what I am doing wrong? Thanks
.h file
#interface TwitterController : UIView <UITableViewDelegate, UITableViewDataSource> {
UIButton* btnCloseView;
UITableView* tblTweets;
UIImageView* imgTwitterIcon;
ColorController* colorManager;
NSMutableArray* tweetsArray;
NSMutableArray* tableData;
NSString* twitterID;
}
#property (nonatomic, retain) NSString* twitterID;
- (NSMutableArray* ) getTweets;
- (void) sendNotification : (id) sender;
#end
.m file
#import "TwitterController.h"
#implementation TwitterController
#synthesize twitterID;
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
colorManager = [ColorController new];
}
return self;
}
/*- (void)drawRect:(CGRect)rect {
}*/
- (void)layoutSubviews {
imgTwitterIcon = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"imgTwitterBird"]];
CGRect twitterIconFrame = [imgTwitterIcon frame];
twitterIconFrame.origin.x = 50.0;
twitterIconFrame.origin.y = 20.0;
tblTweets = [[UITableView alloc] initWithFrame:CGRectMake(50.0, 25.0, 220.0, 500.0)];
tblTweets.separatorStyle = UITableViewCellSeparatorStyleSingleLine;
tblTweets.separatorColor = [colorManager setColor:176.0:196.0:222.0];
tblTweets.layer.borderWidth = 1.0;
tblTweets.rowHeight = 20.0;
tblTweets.scrollEnabled = YES;
tblTweets.delegate = self;
tblTweets.dataSource = self;
tableData = [self getTweets];
UIImage* imgCloseButton = [UIImage imageNamed:#"btnCloseWindow.png"];
CGSize imageSize = imgCloseButton.size;
btnCloseView = [[UIButton alloc] initWithFrame: CGRectMake(220.0, 550.0, imageSize.width, imageSize.height)];
[btnCloseView setImage:[UIImage imageNamed:#"btnCloseWindow.png"] forState:UIControlStateNormal];
[btnCloseView addTarget:self action:#selector(sendNotification:) forControlEvents:UIControlEventTouchUpInside];
[self addSubview:tblTweets];
[self addSubview:imgTwitterIcon];
[self addSubview:btnCloseView];
}
- (NSMutableArray*) getTweets {
//array to hold tweets
tweetsArray = [[NSMutableArray alloc] init];
twitterID = #"Pruit_Igoe";
///set up a NSURL to the twitter API
NSURL* twitterAPI = [NSURL URLWithString:[NSString stringWithFormat:#"https://api.twitter.com/1/statuses/user_timeline.json?include_entities=true&include_rts=true&screen_name=%#&count=10", twitterID]];
//get last 10 tweets (max is 20)
TWRequest *twitterRequest = [[TWRequest alloc] initWithURL:twitterAPI
parameters:nil requestMethod:TWRequestMethodGET];
// Notice this is a block, it is the handler to process the response
[twitterRequest performRequestWithHandler:^(NSData *responseData, NSHTTPURLResponse *urlResponse, NSError *error) {
if ([urlResponse statusCode] == 200) {
// The response from Twitter is in JSON format
// Move the response into a dictionary and print
NSError *error;
NSDictionary *tweetsDict = [NSJSONSerialization JSONObjectWithData:responseData options:0 error:&error];
for(NSDictionary* thisTweetDict in tweetsDict) {
[tweetsArray addObject:[thisTweetDict objectForKey:#"text"]];
}
}
else
NSLog(#"Twitter error, HTTP response: %i", [urlResponse statusCode]);
}];
return tweetsArray;
}
#pragma mark Table Management
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return [tableData count];
NSLog(#"%i", [tableData count]); //does not log!
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [tableData count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"tableCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
cell.textLabel.textColor = [UIColor colorWithRed:66.0/255.0 green:66.0/255.0 blue:66.0/255.0 alpha:1];
cell.textLabel.font = [UIFont fontWithName:#"Helvetica-Bold" size: 13.0];
cell.textLabel.text = [tweetsArray objectAtIndex:indexPath.row];
CGRect cellFrame = [cell frame];
cellFrame.size.height = 25.0;
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
NSString* thisTweet = [tableData objectAtIndex:indexPath.row];
}
#pragma mark Close Window
- (void) sendNotification : (id) sender {
NSMutableDictionary* userData = [[NSMutableDictionary alloc] init];
[userData setObject:#"closeTwitter" forKey:#"theEvent"];
[[NSNotificationCenter defaultCenter] postNotificationName:#"theMessenger" object:self userInfo: userData];
}
#end
I think you are not allocate and initialize tableData. Write it tableData = [[NSMutableArray alloc] init]; in - (id)initWithFrame:(CGRect)frame method or - (void)layoutSubviews method. Just try it.
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
NSLog(#"%i", [tableData count]);
return [tableData count];
//NSLog(#"%i", [tableData count]); //does not log!
}
If the output is zero, tableData array is empty. Check it tableData array
You should do all the initialization (tblTweets for example) in initWithFrame:.
layoutSubviews is ment for laying out subviews.
In fact your code will (should) work if you move all the code fromLayoutSubviews to initWithFrame:. You can then move parts of the code (the laying out part) back.
EDIT: when you move initializing code you will probably also have to add [tblTweets reloadData]; right after tableData = [self getTweets];
When I make an object class conform to NSCoding, the tableView does not show new entries. Suspected it had to do with the object initialization but cannot solve it. Might be very basic but cannot find the error. Here is the code I simplified to post:
Custom Object:
// DataObject.h
#import <Foundation/Foundation.h>
#interface DataObject : NSObject {
NSString *name;
}
#property (nonatomic, copy) NSString *name;
#end
// DataObject.m
#import "DataObject.h"
#implementation DataObject
#synthesize name;
- (void)encodeWithCoder:(NSCoder*)encoder {
[encoder encodeObject:name forKey:#"name"];
}
- (id)initWithCoder:(NSCoder *)decoder {
self = [super init];
if (!self) return nil;
name = [[decoder decodeObjectForKey:#"name"] retain];
return self;
}
These is the TableView root controller - Have omitted a few methods:
// RootViewController.h
#import <UIKit/UIKit.h>
#interface RootViewController : UITableViewController {
NSMutableArray *list;
}
#property (nonatomic, retain) NSMutableArray *list;
- (void)add:(id)sender;
- (NSString *)dataFilePath;
#end
// RootViewController.m
#import "RootViewController.h"
#import "DataObject.h"
#implementation RootViewController
#synthesize list;
- (void)add:(id)sender
{
DataObject *newEntry = [[DataObject alloc] init];
newEntry.name = #"Willy";
[self.list addObject:newEntry];
[self.tableView reloadData];
// Scroll table view to last row
if ([list count] > 1) {
NSUInteger index = list.count - 1;
NSIndexPath *lastRow = [NSIndexPath indexPathForRow:index inSection: 0];
[self.tableView scrollToRowAtIndexPath: lastRow atScrollPosition: UITableViewScrollPositionTop animated: YES];
}
[newEntry release];
}
- (NSString *)dataFilePath
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
return [documentsDirectory stringByAppendingPathComponent:#"datafile"];
}
- (void)viewDidLoad {
[super viewDidLoad];
self.navigationItem.rightBarButtonItem = self.editButtonItem;
self.title = #"Names";
self.list = [[NSMutableArray alloc] init];
NSMutableArray *tempArray = [NSKeyedUnarchiver unarchiveObjectWithFile:[self dataFilePath]];
self.list = tempArray;
UIApplication *app = [UIApplication sharedApplication];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(applicationWillResignActive:)
name:UIApplicationWillResignActiveNotification
object:app];
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
self.navigationItem.rightBarButtonItem = self.editButtonItem;
UIBarButtonItem *addButton = [[UIBarButtonItem alloc]
initWithTitle:#"Add"
style:UIBarButtonItemStylePlain
target:self
action:#selector(add:)];
self.navigationItem.leftBarButtonItem = addButton;
[addButton release];
[self.tableView reloadData];
}
- (void)applicationWillResignActive:(NSNotification *)notification;
{
[NSKeyedArchiver archiveRootObject:self.list toFile:[self dataFilePath]];
}
- (void)viewWillAppear:(BOOL)animated {
[self.tableView reloadData];
[super viewWillAppear:animated];
}
// Customize the number of sections in the table view.
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [list count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
// Configure the cell.
NSUInteger row = [indexPath row];
DataObject *oneName = [self.list objectAtIndex:row];
cell.textLabel.text = oneName.name;
return cell;
}
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
// Delete the row from the data source.
NSUInteger row = [indexPath row];
[self.list removeObjectAtIndex:row];
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
}
}
#end
Oh, man I am so embarrassed...It had nothing to do with NSCoding directly but when I made the data class NSCoding compliant I added in viewDidLoad:
NSMutableArray *tempArray = [NSKeyedUnarchiver unarchiveObjectWithFile:[self dataFilePath]];
self.list = tempArray;
The first line is fine, but the second assigned a new pointer address to self.list and the tempArray was later autoreleased...
As this line was not executed in the "not NSCoding compliant" version it appeared to work then and not when encodeWithCoder and initWithCoder were implemented.
Because of this self.list was nil instead of being initialized and ready when in the add: method I added a new instance. It was created fine, but never added to the array and therefore never showed in the tableView.
This was easily fixed using instead in viewDidLoad:
NSMutableArray *tempArray = [NSKeyedUnarchiver unarchiveObjectWithFile:[self dataFilePath]];
[self.list addObjectsFromArray:tempArray];
Worst part is that I was pulling my hair because of this and was convinced it was because of NSCoding and the initialization of objects...