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• How to navigate to a UITableView position by the cell it's title using indexing

  - by BarryK88

  I'm using a UITableView filled with a around 200 cells containing a title, subtitle and thumbnail image. I want to a have a selection method just like within the contact App from Apple where you can select a character from the alphabet. I'm at the point where I've drawn the selection interface (A,B,C etc), and via it's delegate I'm retrieving the respective index and title (i.e: A = 1, B = 2, C = 3 etc.). Now I want to navigate to the first cell, where the first character of the cell it's title is starting with the selected index character. Just like the contacts App. Can someone give me a direction for how to implement such functionality. - (NSInteger)tableView:(UITableView *)tableView sectionForSectionIndexTitle:(NSString *)title atIndex:(NSInteger)index I filled my sectionIndex by means of - (NSArray *)sectionIndexTitlesForTableView:(UITableView *)tableView { if(searching) return nil; NSMutableArray *tempArray = [[NSMutableArray alloc] init]; [tempArray addObject:@"A"]; [tempArray addObject:@"B"]; [tempArray addObject:@"C"]; [tempArray addObject:@"D"]; [tempArray addObject:@"E"]; [tempArray addObject:@"F"]; [tempArray addObject:@"G"]; [tempArray addObject:@"H"]; [tempArray addObject:@"I"]; [tempArray addObject:@"J"]; [tempArray addObject:@"K"]; [tempArray addObject:@"L"]; [tempArray addObject:@"M"]; [tempArray addObject:@"N"]; [tempArray addObject:@"O"]; [tempArray addObject:@"P"]; [tempArray addObject:@"Q"]; [tempArray addObject:@"R"]; [tempArray addObject:@"S"]; [tempArray addObject:@"T"]; [tempArray addObject:@"U"]; [tempArray addObject:@"V"]; [tempArray addObject:@"W"]; [tempArray addObject:@"X"]; [tempArray addObject:@"Y"]; [tempArray addObject:@"Z"]; return tempArray; }

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• How to set only the first cell of a UITableView to a different color?

  - by Ted

  I use cellForRowAtIndexPath like here: - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if(cell == nil) cell = [self getCellContentView:CellIdentifier]; UILabel *lbl = (UILabel*)[cell.contentView viewWithTag:1]; for (UITableViewCell *c in [tbl visibleCells]) { // UITableViewCell *cell2 = [tbl cellForRowAtIndexPath:[NSIndexPath indexPathForRow:i inSection:0]]; UILabel *lbl = (UILabel*)[c.contentView viewWithTag:1]; lbl.textColor = [UIColor redColor]; } if([tbl indexPathForCell:cell].section==0) lbl.textColor = [UIColor whiteColor]; UILabel *lblTemp1 = (UILabel *)[cell viewWithTag:1]; UILabel *lblTemp2 = (UILabel *)[cell viewWithTag:2]; //First get the dictionary object lblTemp1.text = @"test!"; lblTemp2.text = @"testing more"; NSLog(@"%@",[tbl indexPathForCell:cell]); return cell; } But is still makes some of my cells white instead of gray. How can I change only the first item in the row to white?

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• how to slove error when using thread?

  - by ChandreshKanetiya

  I have following error msg in console when using NSThread "Tried to obtain the web lock from a thread other than the main thread or the web thread. This may be a result of calling to UIKit from a secondary thread. Crashing now..." I have submit my sample code here - (void)viewDidLoad { appDeleg = (NewAshley_MedisonAppDelegate *)[[UIApplication sharedApplication] delegate]; [[self tblView1] setRowHeight:80.0]; [super viewDidLoad]; self.title = @"Under Ground"; [UIApplication sharedApplication].networkActivityIndicatorVisible = YES; [NSThread detachNewThreadSelector:@selector(CallParser) toTarget:self withObject:nil]; } -(void)CallParser { Parsing *parsing = [[Parsing alloc] init]; [parsing DownloadAndParseUnderground]; [parsing release]; [self Update_View]; //[myIndicator stopAnimating]; [UIApplication sharedApplication].networkActivityIndicatorVisible = NO; } here "DownloadAndParseUnderground" is the method of downloding data from the rss feed and -(void) Update_View{ [self.tblView1 reloadData]; } when Update_View method is called the tableView reload Data and in the cellForRowAtIndexPath create error and not display custom cell - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; CustomTableviewCell *cell = (CustomTableviewCell *) [tblView1 dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { [[NSBundle mainBundle] loadNibNamed:@"customCell" owner:self options:nil]; cell = objCustCell; objCustCell = nil; }

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• Make an NSString accessible in the whole class

  - by OhhMee

  Hello, I want to know how can I make an NSString accessible in the whole class. Say I have these codes: - (void) init { NSArray *elements = [xpathParser search:@"//foo"]; TFHppleElement *element = [elements objectAtIndex:0]; NSString *data = [element content]; NSArray *elements1 = [xpathParser search:@"//foo2"]; TFHppleElement *element2 = [elements1 objectAtIndex:0]; NSString *data2 = [element2 content]; } And I want to use data & data2 in the whole class, how can I do that? I want to show results here: - (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. switch (indexPath.row) { case 0 : cell.textLabel.text = (@"%@", data); break; case 1: cell.textLabel.text = (@"%@", data2); break; } // Email & Password Section return cell; }

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• Problem in data binding in NSString?

  - by Rajendra Bhole

  Hi, I selecting the row of the table. The text of the row i stored in the application delegate object as a NSString. That NSString i want to retrieving or binding in SELECT statement of SQLite query, For that i written code in the TableView Class (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { selectedText = [appDelegate.categoryArray objectAtIndex:indexPath.row]; appDelegate.selectedTextOfRow = selectedText; ListOfPrayersViewController *listVC = [[ListOfPrayersViewController alloc] init]; [self.navigationController pushViewController:listVC animated:YES]; [listVC release]; } and database class class code is. + (void) getDuas:(NSString *)dbPath{ if(sqlite3_open([dbPath UTF8String], &database) == SQLITE_OK){ SalahAppDelegate *appDelegate = (SalahAppDelegate *)[[UIApplication sharedApplication] delegate]; NSString *categoryTextForQuery =[NSString stringWithFormat:@"SELECT Category FROM Prayer WHERE Category ='%s'", appDelegate.selectedTextOfRow ]; NSLog(@"The Text %@", categoryTextForQuery); //const char *sqlQuery1 = (char *)categoryTextForQuery; //const char *sqlQuery = "SELECT Category FROM Prayer WHERE Category = 'Invocations for the beginning of the prayer'"; sqlite3_stmt *selectstmt; if(sqlite3_prepare_v2(database, [categoryTextForQuery UTF8String], -1, &selectstmt, NULL) == SQLITE_OK){ appDelegate.duasArray =[[NSMutableArray alloc] init]; while(sqlite3_step(selectstmt) == SQLITE_ROW){ NSString *dua = [[NSString alloc] initWithCString:(char *)sqlite3_column_text(selectstmt,0) encoding:NSASCIIStringEncoding]; Prayer *prayerObj = [[Prayer alloc] initwithDuas:dua]; prayerObj.DuaName = dua; [appDelegate.duasArray addObject:prayerObj]; } } } } The code is comes out of loop on the statement or starting the loop of the while(sqlite3_step(selectstmt) == SQLITE_ROW) Why? How i bind the table selected text in SELECT statement of sqlite?

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• UITableView which has sections as alphabets and various rows within each section

  - by lifemoves

  Hello I have a database in which I am inserting data by parsing an XML document. Populating the data using Navigation bar control view. I have various NSObjects defined in a class and have populated the data using NSMutableArray. Using UITableview I have populated the data. My question is : I have populated the data with the sections defined in it as alphabets so I have total of 26 sections. Each section has data in form of name. Now when I use cellforrowatIndexpath it does not give me the correct index for row and section together. My code is : (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]; } /* Index names as in AB ....Z */ NSString *strIndexNames = [arrCharacters objectAtIndex:indexPath.section]; /* object sections has names in each section */ NSArray *arrIndexedCategories = [objSections objectForKey:strIndexNames]; NSString *strName = [arrIndexedCategories objectAtIndex:indexPath.row] ; cell.textLabel.text = strName; cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator; cell.textLabel.font = [UIFont systemFontOfSize:16]; return cell; } Any help whatsoever will be really helpful. S

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• objectAtIndex:indexPath.row method always causes exception in IOS

  - by kalkin

  Hi I always seem to get exception when I use objectAtInded method to retrieve NSString from an array. I am reading data from a dictionary which is in the "PropertyList.plist" file.My code is - (void)viewDidLoad { [super viewDidLoad]; NSString *path = [[NSBundle mainBundle] pathForResource:@"PropertyList" ofType:@"plist"]; names = [[NSDictionary alloc] initWithContentsOfFile:path]; keys = [[[names allKeys] sortedArrayUsingSelector: @selector(compare:)] retain]; } -(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { NSUInteger section = [indexPath section]; NSUInteger row = [indexPath row]; NSString *key = [keys objectAtIndex:section]; NSArray *nameSection = [names objectForKey:key]; static NSString *SectionsTableIdentifier = @"SectionsTableIdentifier"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:SectionsTableIdentifier]; if(cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:SectionsTableIdentifier] autorelease]; } cell.textLabel.text = [nameSection objectAtIndex:row]; return cell; } The exception happens on the method "cellForRowAtIndexPath" in the line cell.textLabel.text = [nameSection objectAtIndex:row]; The error message is Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFDictionary objectAtIndex:]: unrecognized selector sent to instance 0x6832440 Where ever I use "[nameSection objectAtIndex:row];" type of statement it always get exception.

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• login using UITableView

  - by EquinoX

  How can I create a login for username/password just like in the skype application? I know it's a grouped table view.. but how can I do that? I searched the site and found the following code: - (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]; UILabel *startDtLbl = [[UILabel alloc] initWithFrame:CGRectMake(10, 10, 80, 25)]; if (indexPath.row == 0) startDtLbl.text = @"Username"; else { startDtLbl.text = @"Password"; } startDtLbl.backgroundColor = [UIColor clearColor]; [cell.contentView addSubview:startDtLbl]; UITextField *passwordTF = [[UITextField alloc] initWithFrame:CGRectMake(100, 5, 200, 35)]; passwordTF.delegate = self; if (indexPath.row == 0) passwordTF.tag = 0; else { passwordTF.tag = 1; } [cell.contentView addSubview:passwordTF]; } return cell; } When I do: NSString * username = [((UITextField*)[self.view viewWithTag:0]) text]; NSString * password = [((UITextField*)[self.view viewWithTag:1]) text]; it gives me this error: Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIView text]: unrecognized selector sent to instance 0x6c3c600 Why is this?

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• UITabbleView Sections /cellForRowAtIndexPath method

  - by treasure

  hello, i have a sectioned tableview in a detailviewcontroller where i load some data in the first section. this is my code: - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue2 reuseIdentifier:CellIdentifier] autorelease]; } // For the Ingredients section, if necessary create a new cell and configure it with an additional label for the amount. Give the cell a different identifier from that used for cells in other sections so that it can be dequeued separately. if (indexPath.section == PARAMETERS_SECTION) { switch(indexPath.row) { case 0: cell.textLabel.text = @"Pili"; cell.textLabel.numberOfLines = 1; cell.textLabel.textAlignment = UITextAlignmentLeft; cell.detailTextLabel.text = entity.stid; cell.detailTextLabel.font = [UIFont boldSystemFontOfSize:12]; cell.detailTextLabel.numberOfLines = 2; break; case 1: cell.textLabel.text = @"Pele"; cell.textLabel.numberOfLines = 1; cell.textLabel.textAlignment = UITextAlignmentLeft; cell.detailTextLabel.text = entity.arec; cell.detailTextLabel.font = [UIFont boldSystemFontOfSize:11]; cell.detailTextLabel.numberOfLines = 5; break; case 2: cell.textLabel.text = @"Pale"; cell.textLabel.numberOfLines = 1; cell.textLabel.textAlignment = UITextAlignmentLeft; cell.detailTextLabel.text = entity.wer; cell.detailTextLabel.font = [UIFont boldSystemFontOfSize:11]; cell.detailTextLabel.numberOfLines = 3; break; case 3: cell.textLabel.text = @"Pole"; cell.textLabel.numberOfLines = 1; cell.textLabel.textAlignment = UITextAlignmentLeft; cell.detailTextLabel.text = entity.groid; cell.detailTextLabel.font = [UIFont boldSystemFontOfSize:11]; cell.detailTextLabel.numberOfLines = 3; break; default: break; } if (indexPath.section == NOTES_SECTION) { NSString *text = nil; text = @"User Notes"; cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator; cell.editingAccessoryType = UITableViewCellAccessoryNone; cell.selectionStyle = UITableViewCellSelectionStyleBlue; cell.textLabel.text = text; } if (indexPath.section == EVALUATION_SECTION) { NSString *text = nil; text = @"Evaluation"; cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator; cell.editingAccessoryType = UITableViewCellAccessoryNone; cell.selectionStyle = UITableViewCellSelectionStyleBlue; cell.textLabel.text = text; } if (indexPath.section == CENTERING_SECTION) { NSString *text = nil; text = @"Centering"; cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator; cell.editingAccessoryType = UITableViewCellAccessoryNone; cell.selectionStyle = UITableViewCellSelectionStyleBlue; cell.textLabel.text = text; } } return cell; } everything works ok for the first section. the rest of them seem to be "ignored" Can someone help me? thank you!

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• getting record from CoreData ?

  - by Meko

  Hi. I am trying to add value to CoreData from .plist and get from coreData and show them on UITable. I made take from .plist and send them to CoreData .But I cant take them from CoreData entity and set to some NSMutable array.. Here my codes Edit : SOLVED NSString *path = [[NSBundle mainBundle] pathForResource:@"FakeData" ofType:@"plist"]; NSArray *myArray=[[NSArray alloc] initWithContentsOfFile:path]; FlickrFetcher *flickrfetcher =[FlickrFetcher sharedInstance]; managedObjectContext =[flickrfetcher managedObjectContext]; for(NSDictionary *dict in myArray){ Photo *newPhoto = (Photo *)[NSEntityDescription insertNewObjectForEntityForName:@"Photo" inManagedObjectContext:managedObjectContext]; // set the attributes for the photo NSLog(@"Creating Photo: %@", [dict objectForKey:@"name"]); [newPhoto setName:[dict objectForKey:@"name"]]; [newPhoto setPath:[dict objectForKey:@"path"]]; NSLog(@"Person is: %@", [dict objectForKey:@"user"]); NSPredicate *predicate = [NSPredicate predicateWithFormat:@"name ==%@",[dict objectForKey:@"user"]]; NSMutableArray *peopleArray = (NSMutableArray *)[flickrfetcher fetchManagedObjectsForEntity:@"Person" withPredicate:predicate]; NSEnumerator *enumerator = [peopleArray objectEnumerator]; Person *person; BOOL exists = FALSE; while (person = [enumerator nextObject]) { NSLog(@" Person is: %@ ", person.name); if([person.name isEqualToString:[dict objectForKey:@"user"]]) { exists = TRUE; NSLog(@"-- Person Exists : %@--", person.name); [newPhoto setPerson:person]; } } // if person does not already exist then add the person if (!exists) { Person *newPerson = (Person *)[NSEntityDescription insertNewObjectForEntityForName:@"Person" inManagedObjectContext:managedObjectContext]; // create the person [newPerson setName:[dict objectForKey:@"user"]]; NSLog(@"-- Person Created : %@--", newPerson.name); // associate the person with the photo [newPhoto setPerson:newPerson]; } //THis IS myArray that I want to save value in it and them show them in UITABLE personList=[[NSMutableArray alloc]init]; NSLog(@"lllll %@",[personList objectAtIndex:0]); // save the data NSError *error; if (![managedObjectContext save:&error]) { // Handle the error. NSLog(@"Unresolved error %@, %@", error, [error userInfo]); exit(-1); } } //To access core data objects you can try the following: // setup our fetchedResultsController fetchedResultsController = [flickrfetcher fetchedResultsControllerForEntity:@"Person" withPredicate:nil]; // execute the fetch NSError *error; BOOL success = [fetchedResultsController performFetch:&error]; if (!success) { // Handle the error. NSLog(@"Unresolved error %@, %@", error, [error userInfo]); exit(-1); } // save our data //HERE PROBLEM THAT I DONW KNOW WHERE IT IS SAVING //[personList addObject:(NSMutableArray *)[fetchedResultsController fetchedObjects]]; [self setPersonList:(NSMutableArray *)[fetchedResultsController fetchedObjects]]; } Here my tableview function - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { NSLog(@"ss %d",[personList count]); static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease]; } cell.textLabel.text=[personList objectAtIndex:indexPath.row]; // Set up the cell... return cell; }

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• iphone image is leaking, but where?

  - by Brodie4598

  the image that is being displayed in this code is leaking but I cant figure out how. What I have a tableview that displays images to be displayed. Each time a user selects an image, it should remove the old image, download a new one, then add it to the scroll view. But the old image is not being released and I cant figure out why... -(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { [imageView removeFromSuperview]; self.imageView = nil; NSUInteger row = [indexPath row]; NSString *tempC = [[NSString alloc]initWithFormat:@"http://www.website.com/%@_0001.jpg",[pdfNamesFinalArray objectAtIndex:row] ]; chartFileName = tempC; pdfName = [pdfNamesFinalArray objectAtIndex:row]; [tableView deselectRowAtIndexPath:indexPath animated:YES]; NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *docsPath = [paths objectAtIndex:0]; NSString *tempString = [[[NSString alloc]initWithFormat:@"%@/%@.jpg",docsPath,pdfName]autorelease]; NSData *data = [NSData dataWithContentsOfFile:tempString]; if (data != NULL){ self.imageView = nil; [imageView removeFromSuperview]; self.imageView = nil; UIImageView *tempImage = [[[UIImageView alloc]initWithImage:[UIImage imageWithData:data]]autorelease]; self.imageView = tempImage; [data release]; scrollView.contentSize = CGSizeMake(imageView.frame.size.width , imageView.frame.size.height); scrollView.maximumZoomScale = 1; scrollView.minimumZoomScale = .6; scrollView.clipsToBounds = YES; scrollView.delegate = self; [scrollView addSubview:imageView]; scrollView.zoomScale = .37; } else { [data release]; self.imageView = nil; [imageView removeFromSuperview]; self.imageView = nil; activityIndicator.hidden = NO; getChartsButton.enabled = NO; chartListButton.enabled = NO; saveChartButton.enabled = NO; [NSThread detachNewThreadSelector:@selector(downloadImages) toTarget:self withObject:nil]; } chartPanel.hidden = YES; } -(void) downloadImages { NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init]; self.imageView = nil; [imageView removeFromSuperview]; NSURL *url = [[[NSURL alloc]initWithString:chartFileName]autorelease]; NSData *data = [NSData dataWithContentsOfURL:url]; UIImageView *tempImage = [[[UIImageView alloc]initWithImage:[UIImage imageWithData:data]]autorelease]; self.imageView = tempImage; tempImage = nil; scrollView.contentSize = CGSizeMake(imageView.frame.size.width , imageView.frame.size.height); scrollView.maximumZoomScale = 1; scrollView.minimumZoomScale = .37; scrollView.clipsToBounds = YES; scrollView.delegate = self; [scrollView addSubview:imageView]; scrollView.zoomScale = .6; activityIndicator.hidden = YES; getChartsButton.enabled = YES; chartListButton.enabled = YES; saveChartButton.enabled = YES; [pool drain]; [pool release]; }

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• How to tell when a UISwitch inside of a UITableViewCell has been tapped?

  - by RexOnRoids

  How to tell when a UISwitch inside of a UITableViewCell has been tapped? My UISwitch is set up inside of the cell (generic cell) like this: UISwitch *mySwitch = [[[UISwitch alloc] initWithFrame:CGRectZero] autorelease]; [cell addSubview:mySwitch]; cell.accessoryView = mySwitch; And I am trying to detect a tap like this (but its not working): - (void)tableView:(UITableView *)tableView accessoryButtonTappedForRowWithIndexPath:(NSIndexPath *)indexPath { NSUserDefaults *prefs; if(indexPath.section == 1){ switch(indexPath.row) { case 0: NSLog(@"Tapped Login Switch"); break; default: break; } } }

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• No scrolling occurs when UITableView scrollToRowAtIndexPath is invoked

  - by theactiveactor

  My view contains a simple TableView with 6 rows and a button that invokes doScroll when clicked. My objective for doScroll() is simply scroll to the 5th cell such that it's at top of the table view. - (void)doScroll: (id)sender { NSIndexPath *index = [NSIndexPath indexPathForRow:4 inSection: 1]; [m_tableView scrollToRowAtIndexPath:index atScrollPosition:UITableViewScrollPositionTop animated:YES]; } However when doScroll is invoked, the tableview scrolls only slightly. I suspect this has something to do with the size of the scroll view. So I tried increasing the height of m_tableview.contentsize before scrolling. After I do this however, no scrolling occurs at all... The view controller is a simple UIViewController and refers to the table view via IBOutlet. For some reason, scrolling works as expected for the default Navigation Based Application, where the controller is a UITableViewController

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• Iphone NsMutableArray Count

  - by Claudio

  I have a struct SystemStruct *sharedStruct = [SystemStruct sharedSystemStruct]; implemented as a singleton, to share 3 Arrays. the problem is that when i try to count the array's objects the system crash. es: This code Crash: - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { SystemStruct *SharedStruct = [SystemStruct sharedSystemStruct]; return SharedStruct.path.count; } This Code Work: SystemStruct *SharedStruct = [SystemStruct sharedSystemStruct]; NSLog(@"%d", SharedStruct.path.count); How can i return the correct array count?

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• iPhone SDK: Transparent tableviewcell isn't transparent?

  - by Harkonian

  I have a UITableViewController that has a background image. I am setting the image for the tableview like this: [self.view setBackgroundColor: [UIColor colorWithPatternImage: [UIImage imageWithContentsOfFile: [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent: @"background1.jpg"]]]]; The problem is, each of my custom tableview cells get the same background image--it's repeated in each cell. As a test, I tried making everything in my cell transparent with an alpha of 0.0, but even then although I can't see any of the labels in each cell, I still see the background image repeated in each cell: cell.backgroundColor = [UIColor clearColor]; cell.contentView.backgroundColor = [UIColor clearColor]; cell.contentView.alpha = 0.0; cell.alpha = 0.0; Any suggestions on how to get my table's background image to stop repeating in each cell would be appreciated!

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• Custom View with Bindings in a NSTableCellView

  - by Kyle Kinkade

  i have an XCode 4 project for mac desktop. It has a tableview in it that uses NSTableCellViews. The TableView is connected to an NSArrayController to provide it's content. This is using bindings for custom labels and the like, which has worked out rather well. I have a custom view that i would like to put in the NSTableCellView, which will use custom drawing based on a NSNumber value from my Table Cell View binding. Since XCode 4, you can no longer have ibplugins, which means i can no longer create custom bindings for interface builder to work with. How can I still get this value to my custom view?

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• setSearchDisplayController considered private-API?

  - by Adun

  Hi, I recently submitted an app for app review but I got rejected because of the use of a private API. I'm still a bit new to iPhone developing so I was wondering if someone could help me understand how this part was rejected: UISearchBar *searchBar = [[[UISearchBar alloc] initWithFrame:CGRectMake(0, 0, self.tableView.frame.size.width, 0)] autorelease]; searchBar.showsCancelButton = NO; searchBar.placeholder = @"Search Exhibitors"; [searchBar sizeToFit]; [self.tableView setTableHeaderView:searchBar]; UISearchDisplayController *searchDisplayController = [[UISearchDisplayController alloc] initWithSearchBar:searchBar contentsController:self]; [self performSelector:@selector(setSearchDisplayController:) withObject:searchDisplayController]; [searchDisplayController setDelegate:self]; [searchDisplayController setSearchResultsDataSource:self]; [searchDisplayController setSearchResultsDelegate:self]; [searchDisplayController release]; The part that they mentioned was the "setSearchDisplayController". I based the searching of a UITableView on the example given here. So can anyone explain why this is considered a private API?

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• Is it possible to change the border color of a UISearchDisplayController's search bar?

  - by prendio2

  I have a UISearchBar added as my table header with the following code. searchBar = [[UISearchBar alloc] initWithFrame:self.tableView.bounds]; searchBar.tintColor = [UIColor colorWithWhite:185.0/255 alpha:1.0]; [searchBar sizeToFit]; self.tableView.tableHeaderView = searchBar; Then I set my UISearchDisplayController up as follows. searchDisplayController = [[UISearchDisplayController alloc] initWithSearchBar:searchBar contentsController:self]; [searchDisplayController setDelegate:self]; [searchDisplayController setSearchResultsDataSource:self]; Everything functions as I would like except that the UISearchDisplayController has added a blue(ish) border above the search bar — this bar does not recognise the tintColor I have set on the search bar. Is it possible to change the color of this bar? It is obviously not absolutely crucial but that line is going to bug me forever if it stays blue like that!

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• UIButtonTypeRoundedRect as an accessoryView

  - by phunehehe

  Hello, I have a table view and I want to put a label on the right of each cell, so in - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath I'm having some code like this UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; button.titleLabel.text = @"title"; cell.accessoryView = button; However, the button is not displaying at all. Anyone know why? I am sure that the declaration is correct, because if I replace the button declaration with UIButton *button = [UIButton buttonWithType:UIButtonTypeDetailDisclosure]; then the button appears, which make me think that the rounded rectangle should also appear.

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• How can I retain the editing in the search result with UISearchDisplayController?

  - by wal

  I want to search a table in editing mode, but when I type a letter the variable tableView.editing is changed to NO. And when I cancel the search, the tableView.editing return to YES. I'd like to retain the editing YES in the result of the search. I put breakpoint in several methods. Until the filterContentForSearchText method, the variable is YES, but in the cellForRowAtIndexPath, it is NO. Image of the table in editing mode just before type a letter in the search bar. Image of the search Image of the table after the searching (editing mode again)

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• Striping Rows of a UITableView

  - by Dan Brown

  Hello, I've read posts here on SO about striping a UITableView's cells, but have not been able to work out the details. My code is: - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { // Setup code omitted cell.textLabel.text = @"Blah Blah"; cell.detailTextLabel.text = @"Blah blah blah"; cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator; if ([indexPath row] % 2 == 1) { cell.contentView.backgroundColor = [UIColor colorWithRed:0.9 green:0.9 blue:0.9 alpha:1.0]; cell.textLabel.backgroundColor = [UIColor colorWithRed:0.9 green:0.9 blue:0.9 alpha:0.0]; cell.detailTextLabel.backgroundColor = [UIColor colorWithRed:0.9 green:0.9 blue:0.9 alpha:1.0]; cell.accessoryView.backgroundColor = [UIColor colorWithRed:0.9 green:0.9 blue:0.9 alpha:1.0]; } return cell; } And my result is: Any ideas why this is happening? Thanks!

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• Why doesn’t ABPersonViewController show any properties besides the name?

  - by abrahamvegh

  For some reason, ABPersonViewController is unwilling to display any properties aside from the name, no matter what properties are set for it to display. I’m unable to use the AddressBookUI controllers to let a user select a contact to display, since my UI has custom requirements, otherwise I’d go that route (as Apple does in their sample project.) Here’s the code that doesn’t work — am I missing something? - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { // ABContact is of my own creation ABContact *contact = [self contactAtIndexPath: indexPath]; ABPersonViewController *viewController = [[ABPersonViewController alloc] init]; // This returns a valid ABRecordRef, as indicated by the fact that the // controller does display the name of this contact when it is loaded viewController.displayedPerson = contact.record; // Copied directly from Apple’s QuickContacts sample project NSArray *displayedItems = [NSArray arrayWithObjects:[NSNumber numberWithInt:kABPersonPhoneProperty], [NSNumber numberWithInt:kABPersonEmailProperty], [NSNumber numberWithInt:kABPersonBirthdayProperty], nil]; viewController.displayedProperties = displayedItems; [self.navigationController pushViewController: viewController animated: YES]; [viewController release]; }

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• EXC_BAD_ACCESS due to PostNotification

  - by Sagar Mane

  Hello All, I am facing one issue regarding one module let me clear the flow for the same. I have one customized UITableviewCell. When I am getting some new information I am posting one notification [[NSNotificationCenter defaultCenter] postNotificationName:KGotSomething object:nil userInfo:message]; In view where I am maintaining the table I am initiating a customized cell - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { cell= [[CustomCell alloc] initWithFrame: reuseIdentifier:identifier document:doc]; return cell; } now in customcell.mm - (id)initWithFrame:(CGRect)frame reuseIdentifier:(NSString *)reuseIdentifier { [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(GotSomething:) name:KGotSomething object:nil]; } and in dealloc - (void)dealloc { [[NSNotificationCenter defaultCenter] removeObserver:self name:KGotSomething object:nil]; } Now my app crashes due to this notification and dealloc is never get called. Can you guys help me, how to get this working or anything I m doing wrong over here... Thanks, Sagar

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• Trying to force redraw of UITableViewCell

  - by Suresh

  I found this post on Beveled UITableViewCells from http://news.selectstartstudios.com/beveled-uitableviewcells/. I'm using the technique to reduce the width of the cells, and for the most part it works great. However, I have a small problem. Sometimes the cells are not redrawn properly. For example, even though a cell is supposed to be a "middle" cell, it is drawn as a "top" cell: yfrog.com/f1screenshot20100424at100 How can I fix this? I have tried forcing the cell to redraw via [cell setNeedsDisplay], [cell setNeedsLayout], [tableView reloadRowAtIndexPath:withAnimation:], [cell drawrect:], and [tableView drawRect:atIndexPath]. I am out of ideas. Thanks again!

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• How to crop or get a smaller size UIImage in iPhone without memory leaks?

  - by rkbang

  Hello all, I am using a navigation controller in which I push a tableview Controller as follows: TableView *Controller = [[TableView alloc] initWithStyle:UITableViewStylePlain]; [self.navigationController pushViewController:Controller animated:NO]; [Controller release]; In this table view I am using following two methods to display images: - (UIImage*) getSmallImage:(UIImage*) img { CGSize size = img.size; CGFloat ratio = 0; if (size.width < size.height) { ratio = 36 / size.width; } else { ratio = 36 / size.height; } CGRect rect = CGRectMake(0.0, 0.0, ratio * size.width, ratio * size.height); UIGraphicsBeginImageContext(rect.size); [img drawInRect:rect]; return UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); } - (UIImage*)imageByCropping:(UIImage *)imageToCrop toRect:(CGRect)rect { //create a context to do our clipping in UIGraphicsBeginImageContext(rect.size); CGContextRef currentContext = UIGraphicsGetCurrentContext(); //create a rect with the size we want to crop the image to //the X and Y here are zero so we start at the beginning of our //newly created context CGFloat X = (imageToCrop.size.width - rect.size.width)/2; CGFloat Y = (imageToCrop.size.height - rect.size.height)/2; CGRect clippedRect = CGRectMake(X, Y, rect.size.width, rect.size.height); //CGContextClipToRect( currentContext, clippedRect); //create a rect equivalent to the full size of the image //offset the rect by the X and Y we want to start the crop //from in order to cut off anything before them CGRect drawRect = CGRectMake(0, 0, imageToCrop.size.width, imageToCrop.size.height); CGContextTranslateCTM(currentContext, 0.0, drawRect.size.height); CGContextScaleCTM(currentContext, 1.0, -1.0); //draw the image to our clipped context using our offset rect //CGContextDrawImage(currentContext, drawRect, imageToCrop.CGImage); CGImageRef tmp = CGImageCreateWithImageInRect(imageToCrop.CGImage, clippedRect); //pull the image from our cropped context UIImage *cropped = [UIImage imageWithCGImage:tmp];//UIGraphicsGetImageFromCurrentImageContext(); CGImageRelease(tmp); //pop the context to get back to the default UIGraphicsEndImageContext(); //Note: this is autoreleased*/ return cropped; } But when I pop the Controller, the memory being used is not released. Is there any leaks in the above code used to create and crop images. Also are there any efficient method to deal with images in iPhone. I am having a lot of images and facing major challeges in resolving the memory issues. tnx in advance.

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