I have got an assignment here where I am supposed to
create an application, which copies the all the pasteboard items into
a table, that drills down into a detail view of said pasteboard item
.
Below, I give you my code of the RootViewController.m file. The program does not work and gives me an error of SIGABRT in this line cell.textLabel.text = cellValue;.
Could you tell me please, what could be possibly wrong here and thank you in advance.
#import "RootViewController.h"
#implementation RootViewController
#synthesize detailsViewController;
NSArray* pasteBoardItems;
- (void)viewDidLoad
{
// Get a reference to the system pasteboard
UIPasteboard* pasteBoard = [UIPasteboard generalPasteboard];
NSLog(#"%#", pasteBoard.items);
pasteBoardItems = [pasteBoard.items valueForKey:#"public.utf8-plain-text"];
pasteBoardItems = [pasteBoard.items valueForKey:#"public.item (kUTTypeItem)"];
self.navigationItem.title = #"Pasteboard";
[super viewDidLoad];
}
- (void)dealloc
{
[pasteBoardItems release];
[super dealloc];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [pasteBoardItems 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];
}
NSString *cellValue = [pasteBoardItems objectAtIndex:indexPath.row];
cell.textLabel.text = cellValue;
// Configure the cell.
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
NSUInteger row = [indexPath row];
NSString *rowValue = [pasteBoardItems objectAtIndex:row];
NSString *message = [[NSString alloc] initWithFormat:#"You have selected \"%#\"",rowValue];
if(self.detailsViewController == nil){
DetailsViewController *d = [[DetailsViewController alloc] initWithNibName:#"DetailsViewController" bundle:[NSBundle mainBundle]];
self.detailsViewController = d;
[d release];
}
[self.detailsViewController initWithTextSelected:message];
[self.navigationController pushViewController:self.detailsViewController animated:YES];
}
#end
SIGABRT in most cases means that you want to access released object.
In your case, I suggest to add line [pasteBoardItems retain]; at the end of - (void)viewDidLoad method.
Related
I have a problem that is proving difficult to resolve.
I should open a new UITableView when clicked a cell in the table above.
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
ChoiceChampionViewController *choiceChampionViewController = [[ChoiceChampionViewController alloc] initWithNibName:#"ChoiceChampionViewController" bundle:nil];
NSString * ind = #".....";
NSString * number = ..;
ind = [ind stringByReplacingOccurrencesOfString:#"XX" withString:number];
[[NSUserDefaults standardUserDefaults] setValue:number forKey:#"Region"];
choiceChampionViewController.url = ind;
[self.view addSubview: choiceChampionViewController.view];
}
ChoiceChampionViewController is structured as follows:
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
champion = [[NSMutableArray alloc] init ];
self.navigationItem.title = #"Here is some text to make the navBar big";
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
dispatch_async(kBgQueue, ^{
NSData* data = [NSData dataWithContentsOfURL:[NSURL URLWithString:url]];
[self performSelectorOnMainThread:#selector(fetchedData:) withObject:data waitUntilDone:YES];
});
}
- (void)fetchedData:(NSData *)responseData {
Method for process data
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [champion count];
}
- (UITableViewCell *)tableView:(UITableView *)atableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
League * app = [[League alloc] init];
app = [champion objectAtIndex:[indexPath row]];
cell.textLabel.text = app.title;
return cell;
}
But it keeps giving me this error:
[ChoiceChampionViewController tableView:cellForRowAtIndexPath:]: message sent to deallocated instance.
Can we help me?
open that new UITableViewController or UIViewController with use of pushViewController for go in to new UIViewController like bellow...
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath;{
ChoiceChampionViewController * choiceChampionViewController = [[ChoiceChampionViewController alloc]initWithNibName:#"ChoiceChampionViewController" bundle:nil];
UIBarButtonItem *_backButton = [[UIBarButtonItem alloc] initWithTitle:#"Back" style:UIBarButtonItemStyleDone target:nil action:nil];
self.navigationItem.backBarButtonItem = _backButton;
[_backButton release],
_backButton = nil;
[self.navigationController pushViewController:choiceChampionViewController animated:YES];
[choiceChampionViewController release];
}
UPDATE :
also use this bellow structure for cellForRowAtIndexPath: method...
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:nil];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:CellIdentifier] autorelease];
}
League * app = [[League alloc] init];
app = [champion objectAtIndex:[indexPath row]];
cell.textLabel.text = app.title;
return cell;
}
In my mapview project, I have passed an NSMutableArray of my custom annotation to a table view.
in tha mapview .m code:
MyLocation *nota =[[MyLocation alloc] initWithName:name time:horario];
[_mapView addAnnotation:nota]; //add location to map
[mapViewAnnotations addObject:nota]; //copy "nota" to the new array...
}
TablaViewController *tablaController =[[TablaViewController alloc]initWithNibName:#"TablaViewController" bundle:nil];
tablaController.locationFromMap = mapViewAnnotations; //... then I pass array to table
in the table View:
- (void)viewDidLoad
{
[super viewDidLoad];
self.navigationItem.title = #"Locations";
listOfItems = [[NSMutableArray alloc] init];
for (int i = 0; i < [locationFromMap count]; i++){
MyLocation *location = [locationFromMap objectAtIndex:i];
//Add items
[listOfItems addObject:location.name];
NSLog(#" list count : %d",[listOfItems count]);
}
}
where locationFromMap is a NSmtable array of custom location with some atributes like name, subname etc.
Using :
- (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];
}
NSString *cellValue = [listOfItems objectAtIndex:indexPath.row];
cell.textLabel.text = cellValue;
return cell;
}
location "name" are correctly showed in the table.
My question is how can a come back to map focusing on a concrete location when the relative row is clicked. Perarps my method is wrong ?
Thanks in advance.
so:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
MyLocation *loc = [locationFromMap objectAtIndex:indexPath.row];
MKCoordinateRegion r = MKCoordinateRegionMake(loc.coordinate, MKCoordinateSpanMake(0.005, 0.005));
[self.mapView setRegion:r animated:YES];
}
(typed inline but something like this)
I use UITableView with plist to make a tableview, than how to make a pervious/next button within the DetailView (without back to tableview and press next item)?
The program:
- (void)viewDidLoad
{
[super viewDidLoad];
NSMutableDictionary *labelDict = [[[NSMutableDictionary alloc]initWithContentsOfFile:[[[NSBundle mainBundle]bundlePath]stringByAppendingPathComponent:#"myData.plist"]] retain];
cellImages = [[NSMutableArray alloc ] initWithArray:[labelDict objectForKey:#"image"]];
cellTitles = [[NSMutableArray alloc] initWithArray:[labelDict objectForKey:#"title"]];
cellSubTitles = [[NSMutableArray alloc] initWithArray:[labelDict objectForKey:#"subtitle"]];
NSLog(#"%#", [[[NSBundle mainBundle] bundlePath]stringByAppendingPathComponent:#"myData.plist"]);
}
- (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.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
// Configure the cell.
cell.textLabel.text = [cellTitles objectAtIndex:indexPath.row];
cell.detailTextLabel.text = [cellSubTitles objectAtIndex:indexPath.row];
cell.imageView.image = [UIImage imageNamed:[cellImages objectAtIndex:indexPath.row]];
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if (!self.detailViewController) {
self.detailViewController = [[[DetailViewController alloc] initWithNibName:#"DetailViewController" bundle:nil] autorelease];
}
[self.navigationController pushViewController:self.detailViewController animated:YES];
self.detailViewController.detailImage.image = [UIImage imageNamed:[cellImages objectAtIndex:indexPath.row]];
self.detailViewController.detailDescriptionLabel.text = [cellTitles objectAtIndex:indexPath.row];
self.detailViewController.subTitle.text = [cellSubTitles objectAtIndex:indexPath.row];
self.detailViewController.title = nil;
}
Pass data arrays and current index to the detail view controller. Add actions to the buttons that will be selecting current record to dislpay.
these is some code from my project..
for (index=0; index<[feed count]; index++) {
//NSLog(#"........%#",[feed objectAtIndex:2]);
NSString* forName=[feed objectAtIndex:index];
NSString *nameString = [forName valueForKey:#"name"];
NSLog(#"--------%#",nameString);
[nameArray addObject:nameString];
NSString *idString = [forName valueForKey:#"id"];
NSLog(#"--------%#",idString);
[idArray addObject:idString];
}
MyFriends *detailViewController = [[MyFriends alloc] initWithNibName:#"MyFriends" bundle:nil];
// ...
// Pass the selected object to the new view controller.
detailViewController.fbNames=nameArray;
detailViewController.fbIds=idArray;
[self.navigationController pushViewController:detailViewController animated:YES];
[detailViewController release];
My problem is in another controller when I am accessing array with names which is fbNames in another class it is showing me proper names,But when I am accessing fbIds which is the array with Ids ...they are showing me null..
how to correct this?
here...in this class ...fbNames are working fbIds are not..
- (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 [fbNames 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...
cell.textLabel.text=[fbNames objectAtIndex:indexPath.row];
NSLog(#"%#",cell.textLabel.text);
return cell;
}
NSString* forName=[feed objectAtIndex:index];
NSString *nameString = [forName valueForKey:#"name"];
I don't think NSString has valueForKey:
hoping someone can help me.
In the didSelectRowAtIndexPath method, I am loading and pushing detail view controller, when you tap the "back" button in the detail view to go back to the root view, the app will crash. No error logs or anything.
I'm 95% sure it's got something to do with the "rides" object being released too early, but can't figure it out.
Thanks for your help!
#import "RidesViewController.h"
#import "RideDetailViewController.h"
#import "JSON.h"
#implementation RidesViewController
#synthesize rides;
#pragma mark -
#pragma mark View lifecycle
- (void)viewDidLoad {
[super viewDidLoad];
self.tableView.backgroundView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"table-view-background.png"]];
rides = [[NSDictionary alloc] init];
NSString *filePath = [[NSBundle mainBundle] pathForResource:#"rides" ofType:#"JSON"];
NSData *jsonData = [NSData dataWithContentsOfFile:filePath];
NSString *responseString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
NSDictionary *results = [responseString JSONValue];
rides = [results objectForKey:#"rides"];
[rides retain];
}
#pragma mark -
#pragma mark Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [rides 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.text = [[rides valueForKey:#"title"] objectAtIndex:indexPath.row];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
return cell;
}
#pragma mark -
#pragma mark Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
[tableView deselectRowAtIndexPath:indexPath animated:YES];
RideDetailViewController *rideDetailViewController = [[RideDetailViewController alloc] initWithNibName:#"RideDetailViewController" bundle:nil];
NSString *aTitle = [[NSString alloc] initWithString:[[rides valueForKey:#"title"] objectAtIndex:indexPath.row]];
NSString *aImagePath = [[NSString alloc] initWithString:[[rides valueForKey:#"imagePath"] objectAtIndex:indexPath.row]];
NSString *aDescription = [[NSString alloc] initWithString:[[rides valueForKey:#"description"] objectAtIndex:indexPath.row]];
NSString *aVideoPath = [[NSString alloc] initWithString:[[rides valueForKey:#"videoPath"] objectAtIndex:indexPath.row]];
[rideDetailViewController initWithTitle:aTitle imagePath:aImagePath description:aDescription videoPath:aVideoPath];
[self.navigationController pushViewController:rideDetailViewController animated:YES];
[rideDetailViewController release];
[aTitle release];
[aImagePath release];
[aDescription release];
[aVideoPath release];
}
#pragma mark -
#pragma mark Memory management
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
- (void)dealloc {
[super dealloc];
}
#end
Define your NSString's in your header, then place them in cellForRowAtIndexPath:
just Cut whole thing from viewdidload and paste this on viewwillapper method.