I'm developing an iOS 6 application.
I want to add a search functionallity to a UITableView following this Table Search example from Apple. But, my implementation doesn't work.
On - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath I don't know how to if tableView parameter is searchDisplayController.searchResultsTableView.
Take a look at this screenshot:
As you can see, tableView is a UISearchResultsTableView, but this line:
if ([tableView isEqual:self.searchDisplayController.searchResultsTableView])
It is always false.
Maybe, I need to add an outlet to access seachResultsTableView, but I haven't found that outlet on TableSearch example.
This ViewController.h:
#interface ViewController: UIViewController <UITableViewDelegate, UITableViewDataSource, UISearchDisplayDelegate, UISearchBarDelegate> {
What do I need to do to make it work?
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
if(searching)
{
cell.textLabel.text = [searchedListOfItems objectAtIndex:indexPath.row];
}
else {
NSDictionary *dictionary = [self.tableDataSource objectAtIndex:indexPath.row];
cell.textLabel.text = [dictionary objectForKey:#"Title"];
}
return cell;
if all you're trying to achieve is a normal search then use this.
Related
I fill my tableView with random data. So i don't know how many row i have and how to redirect it to screen i want to. I filled:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
MyClass *currentScreenElement = [self.tableRows objectAtIndex:indexPath.row];
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:currentScreenElement.objectName];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:currentScreenElement.objectName];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
cell.textLabel.text = currentScreenElement.objectName;
return cell;
}
And this works fine. I have a tableView with filled rows. Now i want to redirect to new screen and I doing it with:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
NewScreenClass *myScreen = [[NewScreenClass alloc] init];
self.detailViewController = [[CreateView alloc] initWithScreenDef:[myScreen returnScreenFromName:#"second"]];
[self.navigationController pushViewController:self.detailViewController animated:YES];
}
Of course i know that what I actualy do here is create the same screen for every row. But how can i redirect to screen i want to?
My currentScreenElement object contains properties: objectName (display name in tableView) and objectTarget (screen definition). Both NSString.
And my question is should i save a my currentScreenElement to row patch somehow or maybe I should catch a objectName from dislay name?
In didSelectRowAtIndexPath you can get the cell by using
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
Then just get the text from the cell.
cell.textLabel.text
Why can't you use the self.tableRows array again?
MyClass *currentScreenElement = [self.tableRows objectAtIndex:indexPath.row];
NSString *title = [currentScreenElement objectName];
It's the same thing you did to setup that row, just use it again.
I have a view controller that shows up a table view controller when a button is clicked. Everything works fine with table view delegates, table view is shown fine, but in ellForRowAtIndexPath: delegate method, cell is instantiated and returned, but it's not shown correctly.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"alrededor";
alrededorCell *cell = [tableView
dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[alrededorCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
NSDictionary *categoria = [[NSDictionary alloc] initWithDictionary: [_categoriasArray objectAtIndex:indexPath.row]];
NSLog(#"categoria %#", categoria);
cell.title.text = [categoria valueForKey:#"title"];
return cell;
}
Many thanks
Why are you creating your cell like this?
if (cell == nil) {
cell = [[alrededorCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
If it is your own custom cell why do you use UITableViewCellStyleDefault ?
If the cell you are loading is a subclass of UITableViewCell and you've used the interface builder to build the cell you have to do a couple of things.
In the nib file delete the view that is there when you create it, add a UITableViewCell and change it's class to alrededorCell. Changes the cells class and not the file's owner. When you are linking buttons,labels etc . be sure to link them to the cell not to file's owner. Also set the cells uniqueIdentifier to alrededor.
In cellForRowAtIndexPath
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"alrededor";
alrededorCell *cell = [tableView
dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
NSArray *xib = [[NSBundle mainBundle] loadNibNamed:#"nibName" owner:nil options:nil];
for (alrededorCell *view in xib) {
if ([view isKindOfClass:[alrededorCell class]]) {
cell = view;
}
}
}
NSDictionary *categoria = [[NSDictionary alloc] initWithDictionary: [_categoriasArray objectAtIndex:indexPath.row]];
NSLog(#"categoria %#", categoria);
cell.title.text = [categoria valueForKey:#"title"];
return cell;
}
I have a case but the detailtext is not showing? Does anyone know what te problem is?
i used: UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
UIViewController *controller;
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
switch(indexPath.row) {
case 0:
{
NSLog(#"Case 0");
controller = [[wed1 alloc] init]; //WithStyle:UITableViewStylePlain];
[self.navigationController pushViewController:controller animated:YES];
cell.detailTextLabel.text = #"Wedstrijden!";
}
break;
case 0:
{
NSLog(#"Case 0");
controller = [[wed1 alloc] init]; //WithStyle:UITableViewStylePlain];
//created a controller
[self.navigationController pushViewController:controller animated:YES];
//at his point, you are showing next ViewController's view
cell.detailTextLabel.text = #"Wedstrijden!";
//here you are changing the text of the text for current tableView's cell (which is actually going to be off the screen as new controller's view will be shown after previous statement execution)
}
with the piece of code you shared - I don't find anything wrong here, the detail text should not be visible as this view will be gone.
I don't fully understand why you'd want to set the detail text on a cell after pushing a new view controller. As samfisher said, when the user presses the first cell, in case 0, the new view controller will be alloc'd, init'd and then pushed, and after that you set the detail text to "Wedstrijden".
I'm assuming you're probably just confused between which property to use. My question to you is: when and where do you want this text to appear?
If the cell was created with the style UITableViewCellStyleDefault, the detail text label isn't displayed. In tableView:cellForRowAtIndexPath: implementation, you may create the cell with style UITableViewCellStyleSubtitle or UITableViewCellStyleValue1.
Use UIListContentConfiguration instead, or subtitle won't show.
#import <UIKit/UIListContentConfiguration.h>
And in the cellForRowAtIndexPath method:
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"AddressCell" forIndexPath:indexPath];
if(cell==nil){
cell=[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:#"AddressCell"];
}
NSRange range = [self.dataArray[indexPath.row] rangeOfString:#","];
NSString *street;
NSString *restAddress;
if (range.location != NSNotFound) {
street = [self.dataArray[indexPath.row] substringToIndex:range.location];
restAddress= [self.dataArray[indexPath.row] substringFromIndex:range.location + 1];
}
UIListContentConfiguration *configuration = cell.defaultContentConfiguration;
configuration.text=street;
configuration.image=kImage(#"Location");
configuration.secondaryText=restAddress;
cell.contentConfiguration = configuration;
return cell;
}
Will look like this:
I accidentally deleted my firstviewcontroller.m file which is for a view that has a tableview. I then re-created my .m file the best I can remember and thought I had it all correct.
I'm now getting an error on the line
[self.tableview refresh];
saying self.tableview isn't found.
I can't seem to figure out what I missed. I don't want to overwhelm you guys with code so I'll try to just post the pertinent part.
#import "FirstViewController.h"
#import "Shared.h"
#import "Message.h"
#implementation FirstViewController
-(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];
}
Message *msg = [[Shared sharedInstance].messages objectAtIndex:indexPath.row];
NSString *authorName = msg.authorName;
NSString *cellValue = authorName;
cell.textLabel.text = cellValue;
return cell;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
`return [[Shared sharedInstance].messages count];`
}
-(void) viewWillAppear:(BOOL)animated {
`[self.tableView reloadData];`
}
tableView is a property of UITableViewController. Double-check that you inherited FirstViewController from a UITableViewController, but not from UIViewController.
I need an example or explanations of how to populate 2 table views which are on the same view. I need to understand the "cellForRowAtIndexPath" method, could someone provide me an example on how should the code be?
I mean how to identify which goes which table view?
Thanks
Below is my cellForRowAtIndexPath method:
// 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...
// Set up the cell
MyAppAppDelegate *appDelegate = (MyAppAppDelegate *)[[UIApplication sharedApplication] delegate];
if (tableView == radios_tv) { //radio_tv is an IBOutleet UITableView
sqlClass *aRadio = (sqlClass *)[appDelegate.array_radios objectAtIndex:indexPath.row];
[cell setText:aRadio.r_name];
return cell;
}
if (tableView == presets_tv) { //preset_tv is an IBOutlet UITableView
}
}
and hey vikingsegundo, now I need to delete a cell which is on my TableViewController class, how do I do this? I explain, here is my code:
- (void)tableView:(UITableView *)tv commitEditingStyle:(UITableViewCellEditingStyle)editingStyle
forRowAtIndexPath:(NSIndexPath *)indexPath {
if(editingStyle == UITableViewCellEditingStyleDelete) {
//Get the object to delete from the array.
Coffee *coffeeObj = [appDelegate.coffeeArray objectAtIndex:indexPath.row];
[appDelegate removeCoffee:coffeeObj];
//Delete the object from the table.
[self.tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
}
}
Since we put different controllers, how should we proceed for this line? Should I put the tableViewController instead of the "self"?
//Delete the object from the table.
[self.tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
IMO the cleanest solution would be to have one controller for each tableview.
radios_tv would call it own delegate's method, while presets_tv calls it own.
edit
if you use one controller for n tableview, you will have to use if-statemenst in many places,
in
– numberOfSectionsInTableView:
– tableView:numberOfRowsInSection:
– tableView:titleForHeaderInSection:
…
basically in all UITableViewDatasource-Protocol methods that you will need to implement.
So if you need to change something, you have to change it in many places.
If you use one controller class for one tableview, you won't have to check at all.
write a controller class for every tableview, make it conforming to the UITableViewDatasource protocol
implement the protocol methods you will need. at least
– numberOfSectionsInTableView:,
– tableView:numberOfRowsInSection:,
– tableView:cellForRowAtIndexPath:
call -setDataSource:for every tableview to an object of the right controller class
I think, it was shown in one of the WWDC 2010 videos. I am not sure, but I guess it was Session 116 - Model-View-Controller for iPhone OS.
edit
I wrote an example code: http://github.com/vikingosegundo/my-programming-examples
On one view controller if you have to use two tables then you can set IBOutlet to both tables or assigns different tag to them so when you use following cellForRowAtIndexPath you can differentiate in both tables as below
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCellStyle style =UITableViewCellStyleSubtitle;
static NSString *MyIdentifier = #"MyIdentifier";
DataListCell *cell = (DataListCell*)[tableView dequeueReusableCellWithIdentifier:MyIdentifier];
cell = [[DataListCell alloc] initWithStyle:style reuseIdentifier:MyIdentifier];
cell.selectionStyle=UITableViewCellSelectionStyleNone;
if(tableView==tblLanguage)//tblLanguage IBOutlet for first table
{
if ((selectedIndexPath != nil) && (selectedIndexPath.row == indexPath.row))
{
UIImageView *imgView=[[UIImageView alloc]initWithFrame:CGRectMake(320-30, 9, 22, 15)];
imgView.image=[UIImage imageNamed:#"btn_Expand.png"];
[cell addSubview:imgView];
tblSongs.hidden=NO;
tblSongs.frame=CGRectMake(0,42, 320, ([arrSongListForSpecificLanguage count]*40));
[cell addSubview:tblSongs];
}
else
{
UIImageView *imgView=[[UIImageView alloc]initWithFrame:CGRectMake(320-30, 9, 16, 22)];
imgView.image=[UIImage imageNamed:#"btn_Collaps.png"];
[cell addSubview:imgView];
}
cell.lblCustomerName.textColor=[UIColor blackColor];
cell.lblCustomerName.font=[UIFont boldSystemFontOfSize:16];
//set the first label which is always a NamesArray object
[cell setcustomerName:[objAppDelegate.viewController.arrLanguage objectAtIndex:indexPath.row]];
}
else //for other table
{
ParseData *objParse;
objParse=[arrSongListForSpecificLanguage objectAtIndex:indexPath.row];
cell.lblCustomerName.textColor=[UIColor blackColor];
cell.lblCustomerName.frame=CGRectMake(cell.lblCustomerName.frame.origin.x, cell.lblCustomerName.frame.origin.y, 310, cell.lblCustomerName.frame.size.height);
//set the first label which is always a NamesArray object
[cell setcustomerName:objParse.track];
}
return cell;
}
}
You can also use tag for the same in which your if statement as below
if(tableView.tag==1)//tblLanguage tag=1
Similar if statement use for other delegate & datasource methods of table