Actually I'm trying to implement different images in different rows in UITableView.
by creating a new UITableViewCell I tried a lot to implement this but i failed.I need to set two images and a label in each row.
How can it be done?
And i have to get the image in next page using navigation controller...
please specify me the codes and explain.I couldn't understand it otherwise.
Thanks for your kind informative answers...
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 5;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return 1;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
sampletable1 *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
NSArray* views = [[NSBundle mainBundle] loadNibNamed:#"sampletable1" owner:nil options:nil];
for (UIView *view in views) {
if([view isKindOfClass:[UITableViewCell class]])
{
cell = (sampletable1*)view;
}
}
}
Here is what you need.Subclassing UITableViewCell. The sample shown has two images in there. You can use the same technique to add one more
Related
I have implemented a UISearchBar in my app that is crashing when I hit the clear button and while there's one item found. It's like I type in some character, the app searches and display 1 item, but I when I clear the search, it crashes.
I searched stackoverflow and I am aware that the problem is with the array that holds the search items cause when I hit the clear button the array becomes empty and the tableview index path.row can't be displayed.
Also, if the search returns no item and I hit the clear button I get a similar error message buy this time saying the I got an empty array.
The app stops here:
NSDictionary *itemAtIndice =(NSDictionary *)[filteredCodigos objectAtIndex:indexPath.row];
The problem is that I simple don't know what to do!!!
Here is the error:
Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[__NSArrayM objectAtIndex:]: index 1 beyond bounds [0 .. 0]'
And here is my code::
- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText {
if (searchText.length == 0) {
isFiltered = NO;
} else {
isFiltered = YES;
filteredCodigos = [[NSMutableArray alloc]init];
for (NSDictionary *item in values) {
NSString *string = [item objectForKey:#"NAME"];
NSRange stringRange = [string rangeOfString:searchText options:NSCaseInsensitiveSearch];
if (stringRange.location != NSNotFound) {
[filteredCodigos addObject:item];
}
}
}
[self.tableView reloadData];
}
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar {
[self.Pesquisa resignFirstResponder];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if (isFiltered) {
return [filteredCodigos count];
}
return values.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"Cell" forIndexPath:indexPath];
NSDictionary *itemAtIndex =(NSDictionary *)[values objectAtIndex:indexPath.row];
NSDictionary *itemAtIndice =(NSDictionary *)[filteredCodigos objectAtIndex:indexPath.row];
if (!isFiltered) {
cell.textLabel.text = [itemAtIndex objectForKey:#"SYMBOL"];
cell.detailTextLabel.font = [UIFont systemFontOfSize:10];
cell.detailTextLabel.text = [itemAtIndex objectForKey:#"NAME"];
} else {
cell.textLabel.text = [itemAtIndice objectForKey:#"SYMBOL"];
cell.detailTextLabel.font = [UIFont systemFontOfSize:10];
cell.detailTextLabel.text = [itemAtIndice objectForKey:#"NAME"];
}
return cell;
}
filteredCodigos is declared outside of searchBar:textDidChange: and is used in multiple places but is assigned to in searchBar:textDidChange:. Most likely, some other code is trying to access members of filteredCodigos which is unassigned or empty. Enabling exception breakpoints will help you track it down.
As a side note. You might look at NSPredicate to filter your items instead of the for loop.
Finally managed to fix this issue.
I just replaced indexPath.row for lastObject at the line that was giving me the error:
So, before:
NSDictionary *itemAtIndice =(NSDictionary *)[filteredCodigos objectAtIndex:indexPath.row];
And after:
NSDictionary *itemAtIndice =(NSDictionary *)[filteredCodigos lastObject];
I currently have a searchdisplaycontroller set up and working. The original table view has a segue set up for the title and image to be passed to a detail view. I would like this segue to happen from the search display controller but this is not happening? I know this is possible but can't seem to get it to work? My code is:
- (void)tableView:(UITableView *)tableView
didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[self.detailViewController setDetailItem:[[contentsList objectAtIndex:indexPath.section]
objectAtIndex: indexPath.row]];
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([segue.identifier isEqualToString:#"detailview"]) {
self.detailViewController=segue.destinationViewController;
}
}
#end
and in the detail view to set it all up:
- (void)setDetailItem:(id)newDetailItem
{
if (_detailItem != newDetailItem) {
_detailItem = newDetailItem;
// Update the view.
[self configureView];
}
}
- (void)configureView
{
// Update the user interface for the detail item.
if (self.detailItem) {
self.navigationItem.title = [self.detailItem objectForKey:#"name"];
[self.detailImage setImage:[UIImage imageNamed:self.detailItem[#"image"]]];
}
}
I would be very grateful for any help in solving this issue :)
You can Segue from a Search Display Controller by calling performSegueWithIdentifier:sender: from tableView:didSelectRowAtIndexPath: like this:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
// Get the UITableViewCell that was selected
UITableViewCell *selectedCell = [tableView cellForRowAtIndexPath:indexPath];
// Then this will call prepareForSegue:sender: with selectedCell as sender
[self performSegueWithIdentifier:#"detailview" sender:selectedCell];
}
Then on prepareForSegue:sender: you set your destinationViewController properties
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([segue.identifier isEqualToString:#"detailview"]) {
// Set your destinationViewController properties here
}
}
I have this tableviewcell.m to configure my cells.
It is configuring the text and information correctly but I just can't get it to update the color according to some other information.
Here's the code:
- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {
if (self = [super initWithStyle:style reuseIdentifier:reuseIdentifier]) {
priceLabel = [[UILabel alloc] initWithFrame:CGRectZero];
priceLabel.textAlignment = UITextAlignmentRight;
[priceLabel setFont:[UIFont systemFontOfSize:12.0]];
if ([account.income isEqualToString:#"income"]){
[priceLabel setTextColor:[UIColor greenColor]];
} else if ([account.income isEqualToString:#"expense"]) {
[priceLabel setTextColor:[UIColor redColor]];
} //label, alignment, font are working correctly
//but the if statement doesn't get there
}
The color though, not working at all.
It seems to me that the if statement is being completely ignored.
Could anyone help me to understand why or suggest a better programming approach ?
Here's the cell for row code. I don't know if it will help because they aren't in the same file. Here I'm only referencing my tableviewcell file:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
// create a TableViewCell, then set its account to the account for the current row.
static NSString *AccountCellIdentifier = #"AccountCellIdentifier";
TableViewCell *accountCell = (TableViewCell *)[tableView dequeueReusableCellWithIdentifier:AccountCellIdentifier];
if (accountCell == nil) {
accountCell = [[[TableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:AccountCellIdentifier] autorelease];
accountCell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
[self configureCell:accountCell atIndexPath:indexPath];
return accountCell;
}
//and here the cell config
- (void)configureCell:(TableViewCell *)cell atIndexPath:(NSIndexPath *)indexPath {
// Configure the cell
Account *account = (Account *)[fetchedResultsController objectAtIndexPath:indexPath];
cell.account = account;
}
Many thanks !
Here's the code where i get the texts:
- (void)setAccount:(Account *)newAccount {
if (newAccount != account) {
[account release];
account = [newAccount retain];
}
nameLabel.text = account.name;
accountLabel.text = Account.accounttype;
NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];
[numberFormatter setNumberStyle:NSNumberFormatterCurrencyStyle];
NSString *stringcost = [numberFormatter stringFromNumber:account.cost];
priceLabel.text = stringcost;
}
Yes! I knew I was missing something simple.
All I had to do is "move" that If... statement to where the implementation of the cell is setting the text. There and only there it will update the color (or anything else) so here's my final code that's working perfectly now...
- (void)setAccount:(Account *)newAccount {
if (newAccount != account) {
[account release];
account = [newAccount retain];
}
nameLabel.text = account.name;
accountLabel.text = Account.accounttype;
NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];
[numberFormatter setNumberStyle:NSNumberFormatterCurrencyStyle];
NSString *stringcost = [numberFormatter stringFromNumber:account.cost];
priceLabel.text = stringcost;
if ([account.income isEqualToString:#"income"]){
[priceLabel setTextColor:[UIColor greenColor]];
} else if ([account.income isEqualToString:#"expense"]) {
[priceLabel setTextColor:[UIColor redColor]];
} //this will give me green text color for income and red text color for expense
}
Special thanks for Michael Dauterman who inspired me to stay awake for hours through the night 'till my function is actually working.
i m not sure how to describe this as i m new with all the developing and i m really looking forward to an answer from you guys. I know you can be very busy but please try to HELP me!
Here it goes. I have an app that loads a very large database (although it only has 100 entries it contains HiRes images (100MB) ).
At start up a tableview presents the rows -records (using only 3 attributes from the database). However it seems that the WHOLE database (including the images) is loaded at start up!
IS THERE A WAY TO ONLY LOAD THE 3 attributes (something like "select") when the app starts and then when the user moves to didselectrowatindexpath load the rest of the record?
Because i have NO IDEA where to look or what to do i would appreciate some coding help!
here is the code i m using:
#pragma mark -
#pragma mark App support
- (NSFetchedResultsController *)resetFetchedResultsController:(NSPredicate *)predicate cached:(BOOL)cached
{
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription entityForName:#"Records" inManagedObjectContext:managedObjectContext];
[fetchRequest setEntity:entity];
NSSortDescriptor *partDescriptor = [[NSSortDescriptor alloc] initWithKey:#"displayOrder" ascending:YES];
NSSortDescriptor *nameDescriptor = [[NSSortDescriptor alloc] initWithKey:#"name" ascending:YES];
NSArray *sortDescriptors = [[NSArray alloc] initWithObjects: partDescriptor, nameDescriptor, nil];
[fetchRequest setSortDescriptors:sortDescriptors];
if (predicate != nil)
[fetchRequest setPredicate:predicate];
NSString *cacheName = nil;
if (cached)
cacheName = #"Root";
NSFetchedResultsController *aFetchedResultsController = [[[NSFetchedResultsController alloc]
initWithFetchRequest:fetchRequest
managedObjectContext:managedObjectContext
sectionNameKeyPath:nil
cacheName:cacheName] autorelease];
aFetchedResultsController.delegate = self;
[fetchRequest release];
[partDescriptor release];
[nameDescriptor release];
[sortDescriptors release];
NSError *error = nil;
if (![aFetchedResultsController performFetch:&error]) {
// Handle error
NSLog(#"Unresolved error %#, %#", error, [error userInfo]);
exit(-1); // Fail
}
return aFetchedResultsController;
}
- (void)showRecords:(Records *)records animated:(BOOL)animated {
.
RecordsDetailViewController *detailViewController = [[RecordsDetailViewController alloc] initWithStyle:UITableViewStyleGrouped];
detailViewController.records = records;
[self.navigationController pushViewController:detailViewController animated:animated];
[detailViewController release];
}
#pragma mark -
#pragma mark Table view methods
- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
{
cell.backgroundColor = [UIColor lightGrayColor];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
NSInteger count = [[fetchedResultsController sections] count];
if (count == 0) {
count = 1;
}
return count;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
NSInteger numberOfRows = 0;
if ([[fetchedResultsController sections] count] > 0) {
id <NSFetchedResultsSectionInfo> sectionInfo = [[fetchedResultsController sections] objectAtIndex:section];
numberOfRows = [sectionInfo numberOfObjects];
}
return numberOfRows;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *RecordCellIdentifier = #"RecordCellIdentifier";
RecordTableViewCell *recordCell = (RecordTableViewCell *)[tableView dequeueReusableCellWithIdentifier:RecordCellIdentifier];
if (recordCell == nil) {
recordCell = [[[RecordTableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:RecordCellIdentifier] autorelease];
recordCell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
[self configureCell:recordCell atIndexPath:indexPath];
return recordCell;
}
- (void)configureCell:(RecordTableViewCell *)cell atIndexPath:(NSIndexPath *)indexPath {
// Configure the cell
Records *records = (Records *)[fetchedResultsController objectAtIndexPath:indexPath];
cell.records = records;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
if (self.searchDisplayController.isActive)
[self.tableView reloadData];
Records *records = (Records *)[fetchedResultsController objectAtIndexPath:indexPath];
[self showRecords:records animated:YES];
}
//this is from the RecordTableViewCell.m to show you the attributes i m using:
#pragma mark -
#pragma mark Record set accessor
- (void)setRecord:(Record *)newRecord {
if (newRecord != record) {
[record release];
record = [newRecord retain];
}
imageView.image = [UIImage imageNamed:#"icon.png"];
nameLabel.text = record.name;
overviewLabel.text = record.overview;
partLabel.text = record.part;
}
thanks again...
I would separate the large file from the metadata, because I like to have the freedom to manage these expensive resources seParately. Then I could store them differently, eg filesystem, or http server. This allows me to cache them or send them to remote locAtions proactively to reduce the download times
The rest of the table can then fit in less blocks in the database so less disk access is needed. Many databases do this internally anyway, eg postgresql
You can the just refer to the heavy resource by Id
Ok here it goes. I ve gave up the idea of loading separately the attributes that i need at start up.
What i ve done AND NOW WORKS FLAWLESSLY is to do create RELATIONSHIPS in my model. Images are now loading only when called!
This solution was in my mind but because i had already populated my database it was difficult for me to repeat this step.
However i m glad that i did!
NOW it works as it should!!
Happy Developer!!
I'm trying to set up a Tab Bar Application as my root controller, and one of the tabs to be a Navigation setup. On my Root View Controller of the Navigation View, I have one child level that is a subclass of the UIViewController called IntervalViewController.
I have this in my Root View Controller (IntervalSetupViewController.m):
#import "IntervalSetupViewController.h"
#import "IntervalViewController.h"
#implementation IntervalSetupViewController
#synthesize controllers; // My Array for the Table View Cells
- (void)viewDidLoad {
self.title = #"Interval Setup";
NSMutableArray *array = [[NSMutableArray alloc] init];
// Interval List Setup
IntervalViewController *newInterval = [[IntervalViewController alloc]
initWithStyle:UITableViewStylePlain];
newInterval.title = #"Interval 1";
[array addObject:newInterval];
[newInterval release];
self.controllers = array;
[array release];
[super viewDidLoad];
}
- (void)viewDidUnload {
self.controllers = nil;
[super viewDidUnload];
}
- (void)dealloc {
[controllers release];
[super dealloc];
}
#pragma mark -
#pragma mark Table Data Source Methods
- (NSInteger)tableView:(UITableView *)table numberOfRowsInSection:(NSInteger)section {
return [self.controllers count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *IntervalCell = #"IntervalCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:IntervalCell];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:IntervalCell] autorelease];
}
// Configure the cell
NSUInteger row = [indexPath row];
IntervalViewController *newController = [controllers objectAtIndex:row];
cell.textLabel.text = newController.title;
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
return cell;
}
#pragma mark Table View Delegate Methods
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
NSUInteger row = [indexPath row];
IntervalViewController *nextController = [self.controllers objectAtIndex:row];
[self.navigationController pushViewController:nextController animated:YES];
}
#end
This is the error screen from the console:
* -[IntervalViewController initWithStyle:]: unrecognized selector sent to instance 0x3b33e60
* Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[IntervalViewController initWithStyle:]: unrecognized selector sent to instance 0x3b33e60'
I assume that I am passing an invalid argument to my initWithStyle method, but I thought UITableViewStylePlain was a valid parameter. Am I setting this up right? I was following the example in APress Beginning iPhone Development 3 book and trying to modify it a little to what I wanted to do, but I'm new to coding. Thanks!
initWithStyle is used to initialize a UITableViewController not a UIViewController