i've been trying to get a segue to work. I've written the following... but for some reason, the ...preparesegue... method doesnt fire. I've read other related posts but i cant get it to fire, and just as importantly, the variable i'm need isnt transferred.
m file:
#implementation CountryTableViewController
-(void) getData:(NSData *) data {
NSError *error;
json = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
[self.tableView reloadData];
}
-(void) start {
NSURL *url = [NSURL URLWithString: URL];
NSData *data = [NSData dataWithContentsOfURL:url];
[self getData:data];
}
- (void)viewDidLoad {
[super viewDidLoad];
[self start];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
// Return the number of sections.
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
// Return the number of rows in the section.
return [json count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *cellId = #"CellIdentifier";
TableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellId];
if (!cell) {
cell = [[TableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:cellId];
}
NSDictionary *info = [json objectAtIndex:indexPath.row];
cell.TitleLabel.text = [info objectForKey:#"CountryName"];
cell.ReferenceLabel.text = [info objectForKey:#"id"];
return cell;
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender tableView:(UITableView *)tableView {
//if ([segue.identifier isEqualToString:#"CountryToState"]) {
NSLog(#"TEST");
NSIndexPath *path = [self.tableView indexPathForSelectedRow];
TableViewCell *cell = (TableViewCell *)[tableView cellForRowAtIndexPath:path];
NSString *countryRef = [[cell ReferenceLabel] text];
TableViewControllerStates *TVCS = [segue destinationViewController];
TVCS.receivedReferenceNumber = countryRef;
//}
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
//TableViewCell *cell = (TableViewCell *)[tableView cellForRowAtIndexPath:indexPath];
//NSString *countryRefNumber = [[cell ReferenceLabel] text];
[self performSegueWithIdentifier:#"CountryToState" sender:tableView];
}
h file
#import <UIKit/UIKit.h>
#define URL #"http://localhost/Rs.php"
#interface CountryTableViewController : UITableViewController <UITableViewDelegate, UITableViewDataSource> {
NSMutableArray *json;
}
Any help appreciated; thank you in advance.
Related
I am trying to create a search bar in Xcode so when you search for an item, you can click on the search result cell and it will go to a view controller but all it is doing now is going to the sea view controller and just displaying the label of the cell i clicked on.
Here is my .m file
#interface ListTableViewController () <UISearchDisplayDelegate>
#property (strong, nonatomic) NSArray *dataArray;
#property (strong, nonatomic) NSArray *searchResults;
#end
#implementation ListTableViewController
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.dataArray = [NSArray arrayWithObjects:#"Tomb Raider", #"Little Big Planet", #"Unchanted 3", #"BlackOps 2", nil];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)filterContentForSearchText: (NSString *) searchText
{
NSPredicate *resultPredicate = [NSPredicate predicateWithFormat:#"SELF CONTAINS[cd] %#", searchText];
self.searchResults = [self.dataArray filteredArrayUsingPredicate:resultPredicate];
}
-(BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString
{
[self filterContentForSearchText:searchString];
return YES;
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection: (NSInteger)section
{
if (tableView == self.tableView) {
return [self.dataArray count];
} else { // (tableView == self.searchDisplayController.searchResultsTableView)
return [self.searchResults count];
}
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [self.tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
if (tableView == self.tableView) {
cell.textLabel.text = [self.dataArray objectAtIndex:indexPath.row];
} else {
cell.textLabel.text = [self.searchResults objectAtIndex:indexPath.row];
}
return cell;
}
#pragma mark - Table view delegate
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([segue.identifier isEqualToString:#"showDetails"]) {
DetailsViewController *dvc = segue.destinationViewController;
NSIndexPath *indexPath = nil;
if ([self.searchDisplayController isActive]) {
indexPath = [self.searchDisplayController.searchResultsTableView indexPathForSelectedRow];
dvc.sendLabel = [self.searchResults objectAtIndex:indexPath.row];
return;
} else{
indexPath = [self.tableView indexPathForSelectedRow];
dvc.sendLabel = [self.dataArray objectAtIndex:indexPath.row];
return;
}
}
}
#end
Thanks, anything will help.
You must implement this delegate method :
// Method returns the clicked row.
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
YourPushedViewController *ypVC = [[YourPushedViewController alloc] initWithNibName:#"YourPushedViewController" bundle:nil];
ypVC.selectedText = myResultArray[indexPath.row];
[self.navigationController pushViewController:ypVC animated:YES];
}
That method is response for selecting row and passing selected result to another view.
This is hint for you :Passing Data between View Controllers
I created a custom cell in table view that has a search bar. Text entered by users will be used to search a SQLite db and results displayed in table view. The problem I have now is that the search result is not displayed in the table view if I use custom cell but works when I use the default cell. For e.g., in code below, if I use [cell setText:currentSubLocality]; it will display the result but it will not display result if I use cell.lblG.text = currentLocation;. Please help, been struggling with it for 2 days. Thanks
#import "CustomViewController.h"
#import "FMDBDataAccess.h"
#import "locationCode.h"
#import "CustomCell.h"
#interface CustomViewController ()
#end
#implementation CustomViewController{
NSMutableArray *searchResults;}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return [searchResults count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
CustomCell *cell = [tableView dequeueReusableCellWithIdentifier:#"vvv"];
if (cell==nil){
cell = [[CustomCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:#"vvv"];
}
if (tableView == self.searchDisplayController.searchResultsTableView)
{
locationCode *code = [[locationCode alloc] init];
code= [searchResults objectAtIndex:indexPath.row];
NSString *currentLocation = code.location;
NSString *currentSubLocality = code.subLocality
//[cell setText:currentSubLocality];
cell.lblG.text = currentLocation;
cell.lblL.text = currentSubLocality;
}
return cell;
}
- (void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope
{
NSString *databasePath = [[NSBundle mainBundle] pathForResource:#"spr" ofType:#"sqlite"];
FMDatabase *database = [FMDatabase databaseWithPath:databasePath];
[database open];
searchResults = [[NSMutableArray alloc] initWithObjects:nil count:0];
NSString *query = [NSString stringWithFormat:#"select * from Locations where locationCode like '%#%%'", searchText];
FMResultSet *results = [database executeQuery:query];
while([results next]) {
locationCode *code = [[locationCode alloc] init];
code.code = [results stringForColumn:#"locationcode"];
code.subLocality= [results stringForColumn:#"sublocality"];
code.longitude= [results stringForColumn:#"longitude"];
code.latitude= [results stringForColumn:#"latitude"];
[searchResults addObject:code];
}
[database close];
}
-(BOOL)searchDisplayController:(UISearchDisplayController *)controller
shouldReloadTableForSearchString:(NSString *)searchString
{
[self filterContentForSearchText:searchString
scope:[[self.searchDisplayController.searchBar scopeButtonTitles]
objectAtIndex:[self.searchDisplayController.searchBar
selectedScopeButtonIndex]]];
return YES;
}
#end
Try This it will work. paste the below code in cellforrowatindexpath method and don't forget to set your TableViewCell "Identifier" in your Attribute inspector
static NSString *CellIdentifier = #"Cell";
CustomCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell==nil) {
cell = [[CustomCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
I solved the problem by adding the tableview as an outlet. Then change the following line
CustomCell *cell = [tableView dequeueReusableCellWithIdentifier:#"vvv"];
to
CustomCell *cell = [customTableView dequeueReusableCellWithIdentifier:#"vvv"];
I'm creating a simple app that stores data into a sqlite database and retrieves data from it. I'm able to store data and I'm also able to populate a UITableView with all the data, showing a field (name) in the prototype cell. What I'm trying to do now is to open a view on tap to show ALL the details. So I did set up a viewController with 3 fields to be filled in, but I don't know how to transfer data between that cell to the new view.
Here's my code:
#import "RootViewController.h"
#import "AppDelegate.h"
#import "Inserimento_Esame.h"
#import "Dettagli_Esame.h"
#interface RootViewController ()
#end
#implementation RootViewController
#synthesize nome,crediti,voto;
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
NSString *docsDir;
NSArray *dirPaths;
dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,
YES);
docsDir = [dirPaths objectAtIndex:0];
databasePath = [[NSString alloc] initWithString: [docsDir stringByAppendingPathComponent:
#"Esami.sqlite"]];
dataList = [[Data alloc] init:databasePath];
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:
(UIInterfaceOrientation)interfaceOrientation
{return YES;}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
return [dataList getSize];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath
*)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle
reuseIdentifier:CellIdentifier];
}
NSDictionary *itemAtIndex = (NSDictionary *)[dataList objectAtIndex:indexPath.row];
cell.textLabel.textColor = [UIColor whiteColor];
cell.textLabel.text = [itemAtIndex objectForKey:#"nome"];
cell.detailTextLabel.textColor = [UIColor whiteColor];
cell.detailTextLabel.text = [itemAtIndex objectForKey:#"voto"];
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath
*)indexPath {
[self performSegueWithIdentifier:#"DETTAGLI" sender:indexPath];
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([[segue identifier] isEqualToString:#"DETTAGLI"]) {
NSLog(#"Dettagli");
Dettagli_Esame *destination = [segue destinationViewController];
NSIndexPath * myIndexPath = [self.tableView indexPathForSelectedRow];
NSDictionary *itemAtIndex = (NSDictionary *)[dataList objectAtIndex:myIndexPath.row];
destination.Dett = itemAtIndex;
// I THINK I MUST PUT HERE MY MISSING CODE
}
}
#end
EDIT3
#import "Dettagli_Esame.h"
#interface Dettagli_Esame ()
#end
#implementation Dettagli_Esame
#synthesize nome;
#synthesize crediti;
#synthesize voto;
#synthesize Dett;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{[super viewDidLoad];}
EDIT5-6:
-(void)viewDidAppear:(BOOL)animated{
NSString *docsDir;
NSArray *dirPaths;
NSLog(#"Dettagli Esame");
dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,
YES);
docsDir = [dirPaths objectAtIndex:0];
databasePath = [[NSString alloc] initWithString: [docsDir stringByAppendingPathComponent:
#"Esami.sqlite"]];
dataList = [[Data alloc] init:databasePath];
nome.text = [Dett objectForKey:#"nome"];
crediti.text = [Dett objectForKey:#"crediti"];
voto.text = [Dett objectForKey:#"voto"];
NSLog(#"Dettagli Esame: %#", self.Dett);
}
You seem to be on the right track. The information that destination needs is the same that you used to populate your cell (actually, you say 3 fields but I'll assume they're all in the same dictionary), so:
NSDictionary *itemAtIndex = (NSDictionary *)[dataList objectAtIndex:myIndexPath.row];
Then you need to create a NSDictionary property in the Dettagli_Esame class and assign it, something like:
destination.displayDictionary = itemAtIndex;
These lines would go where you indicate "missing code".
Am trying to run the following code for a table with initWithStyle:UITableViewCellStyleSubtitle but the subtitle is not showing. Can you tell me what's wrong?
Thanks in advance!
#import "ViewController.h"
#interface ViewController ()
#end
#implementation ViewController
#synthesize listData;
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
NSArray *array = [[NSArray alloc] initWithObjects:#"Sleepy", #"Sneezy", #"Bashful", #"Happy", #"Doc", #"Grumpy", #"Dopey", #"Thorin", #"Dorin", #"Nori", #"Ori", #"Balin", #"Dwalin", #"Fili", #"Kili", #"Oin", #"Gloin", #"Bifur", #"Bofur", #"Bombur", nil];
self.listData = array;
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
self.listData = nil;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}
#pragma mark -
#pragma mark Table View Data Source Methods
- (NSInteger)tableView:(UITableView *)tableView
numberOfRowsInSection:(NSInteger)section
{
return [self.listData count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *SimpleTableIdentifier = #"SimpleTableIdentifier";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:SimpleTableIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc]
initWithStyle:UITableViewCellStyleSubtitle
reuseIdentifier:SimpleTableIdentifier];
}
UIImage *image = [UIImage imageNamed:#"star.png"];
cell.imageView.image = image;
NSUInteger row = [indexPath row];
cell.textLabel.text = [listData objectAtIndex:row];
return cell;
if (row < 7)
cell.detailTextLabel.text = #"Mr. Disney";
else
cell.detailTextLabel.text = #"Mr.Tolkien";
}
#end
return cell;
Should be the last line. It returns before setting the detailTextLabel's text property.
Also, you should have received a warning from Xcode about "unreachable code."
I'm working with the google YouTube API, and I'm using this code found here http://pastebin.com/vmV2c0HT
The Code that slows things down is this one here
cell.imageView.image = [UIImage imageWithData:data];
When I remove that code it scrolls smoothly. Any idea on how I can go about having it load the images from google but still scroll smoothly? I've read some of the answers on loading images in a different way, but I still can't figure out how I'll make that work with the code I'm using.
Any help will be appreciated.
Bellow is the full code.
#import "RootViewController.h"
#interface RootViewController (PrivateMethods)
- (GDataServiceGoogleYouTube *)youTubeService;
#end
#implementation RootViewController
#synthesize feed;
- (void)viewDidLoad {
NSLog(#"loading");
GDataServiceGoogleYouTube *service = [self youTubeService];
NSString *uploadsID = kGDataYouTubeUserFeedIDUploads;
NSURL *feedURL = [GDataServiceGoogleYouTube youTubeURLForUserID:#"BmcCarmen"
userFeedID:uploadsID];
[service fetchFeedWithURL:feedURL
delegate:self
didFinishSelector:#selector(request:finishedWithFeed:error:)];
[super viewDidLoad];
}
- (void)request:(GDataServiceTicket *)ticket
finishedWithFeed:(GDataFeedBase *)aFeed
error:(NSError *)error {
self.feed = (GDataFeedYouTubeVideo *)aFeed;
[self.tableView reloadData];
}
#pragma mark Table view methods
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
// Customize the number of rows in the table view.
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [[feed entries] count];
}
// Customize the appearance of table view cells.
- (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.
GDataEntryBase *entry = [[feed entries] objectAtIndex:indexPath.row];
NSString *title = [[entry title] stringValue];
NSArray *thumbnails = [[(GDataEntryYouTubeVideo *)entry mediaGroup] mediaThumbnails];
cell.textLabel.text = title;
NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:[[thumbnails objectAtIndex:0] URLString]]];
cell.imageView.image = [UIImage imageWithData:data];
return cell;
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
return 100.0f;
}
- (void)dealloc {
[super dealloc];
}
- (GDataServiceGoogleYouTube *)youTubeService {
static GDataServiceGoogleYouTube* _service = nil;
if (!_service) {
_service = [[GDataServiceGoogleYouTube alloc] init];
[_service setShouldCacheDatedData:YES];
[_service setServiceShouldFollowNextLinks:YES];
}
// fetch unauthenticated
[_service setUserCredentialsWithUsername:nil
password:nil];
return _service;
}
#end
GCD is a wonderful thing. Here is what I do:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"youTubeCell";
UITableViewCell *cell = nil;
cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
// Configure the cell.
GDataEntryBase *entry = [[feed entries] objectAtIndex:indexPath.row];
NSString *title = [[entry title] stringValue];
NSArray *thumbnails = [[(GDataEntryYouTubeVideo *)entry mediaGroup] mediaThumbnails];
cell.textLabel.text = title;
// Load the image with an GCD block executed in another thread
dispatch_queue_t downloadQueue = dispatch_queue_create("image downloader", NULL);
dispatch_async(downloadQueue, ^{
NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:[[thumbnails objectAtIndex:0] URLString]]];
UIImage * image = [UIImage imageWithData:data];
dispatch_async(dispatch_get_main_queue(), ^{
cell.imageView.image = image;
cell.imageView.contentMode = UIViewContentModeScaleAspectFit;
[cell setNeedsLayout];
});
});
dispatch_release(downloadQueue);
return cell;
}
Scrolling is now super smooth. The only drawback is that when you scroll quickly, cells are re-used and sometimes the images change as new ones come in.