I'm working on information retrieval where in the latest information in on top of UITableView. The code goes like this.
-(UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
LoanModel* loan = _feed.products[indexPath.row];
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"Cell" ];
if (cell == nil) {
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleValue2 reuseIdentifier:#"Cell"];
}
NSString *myString = [NSString stringWithFormat:#"%#",[loan name]];
NSArray *myWords = [myString componentsSeparatedByString:#","];
NSMutableArray *reversed = [NSMutableArray arrayWithCapacity:[myWords count]];
NSEnumerator *enumerator = [myWords reverseObjectEnumerator];
for (id element in enumerator) {
[reversed addObject:element];
}
NSMutableString *reverseString = [reversed componentsJoinedByString:#","];
cell.textLabel.text = reverseString;
return cell;
}
I'm getting the JSON object which contain two fields cid and name respectively. I'm showing only the name is tableview. But I want to show it in reverse i,e last update should show at first. But above code showing the content in reverse. IF "hello" is the content, then it shows "olleh". Please suggest me how to get the UITableView in reverse list. I'm a newbie to iOS.
If you want to have the reversed order of cells / objects they represent, you have to change
LoanModel* loan = _feed.products[indexPath.row];
to
LoanModel* loan = _feed.products[_feed.products.count - 1 - indexPath.row];
assuming that _feed.products is an NSArray.
The array you are using to display the the data in tableView, you'll need to reverse that and then display the data in tableView
NSArray* reversed = [[myArray reverseObjectEnumerator] allObjects];
you can use this to make your array objects order in reverse.
Try This:
NSArray* reversedArray = [[myWords reverseObjectEnumerator] allObjects];
Related
A lot of the methods have deprecated in iOS 7 in order to set font, textLabel, and color for UITableView cells. I'm also just having a difficult time populating the view with these values. Here's a snippet of my code:
- (void)fetchedData:(NSData *)responseData {
//parse out the json data
NSError* error;
NSDictionary* json = [NSJSONSerialization
JSONObjectWithData:responseData
options:kNilOptions
error:&error];
NSArray* jobs = [json objectForKey:#"results"];
for(NSDictionary *jobsInfo in jobs) {
JobInfo *jobby = [[JobInfo alloc] init];
jobby.city = jobsInfo[#"city"];
jobby.company = jobsInfo[#"company"];
jobby.url = jobsInfo[#"url"];
jobby.title = jobsInfo[#"jobtitle"];
jobby.snippet = jobsInfo[#"snippet"];
jobby.state = jobsInfo[#"state"];
jobby.time = jobsInfo[#"date"];
jobsArray = [jobsInfo objectForKey:#"results"];
}
}
I am looping through an array of dictionaries from a GET request and parsed. I am now attempting to fill my UITableView with the following code:
-
(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
return [jobsArray 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];
}
NSDictionary *jobsDic = [jobsArray objectAtIndex:indexPath.row];
[cell.textLabel setText:[jobsDic objectForKey:#"jobtitle"]];
return cell;
}
Also, I have declared this is in my .h file:
NSArray *jobsDic;
Any ideas on what I'm doing wrong? Is this an iOS 7 problem?
It seems that you reinitialize jobsarray at the end of the forin loop.
You didn't mean ?
NSArray* jobs = [json objectForKey:#"results"];
NSMutableArray *jobsTemp = [[NSMutableArray alloc] initWithCapacity:jobs.count];
for(NSDictionary *jobsInfo in jobs) {
JobInfo *jobby = [[JobInfo alloc] init];
jobby.city = jobsInfo[#"city"];
jobby.company = jobsInfo[#"company"];
jobby.url = jobsInfo[#"url"];
jobby.title = jobsInfo[#"jobtitle"];
jobby.snippet = jobsInfo[#"snippet"];
jobby.state = jobsInfo[#"state"];
jobby.time = jobsInfo[#"date"];
[jobsTemp addObject:jobby];
}
self.jobsArray = jobsTemp; //set #property (nonatomic, copy) NSArray *jobsArray; in the .h
[self.tableView reloadData]; //optional only if the data is loaded after the view
In the cell for row method :
- (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];
}
JobInfo *job = self.jobsArray[indexPath.row];
cell.textLabel.text = job.title;
return cell;
}
And don't forget :
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return self.jobsArray.count;
}
Update - an user suggested an edit :
It's true that count isn't a NSArray property. But as Objective-C lets us use a shortcut notation for calling method with a dot, this code works. You have to know limitation of this : if you use a NSArray subclass with a count property with a custom getter this could have side effects #property (nonatomic, strong, getter=myCustomCount) NSUInteger count. As I think code readability is to me one of most important things I prefer to use dot notation. I think Apple SHOULD implement count as readonly property so I use it this way (but it's my point of view). So for those which don't agree with me just read return [self.jobsArray count]; in the tableView:numberOfRowsInSection: method.
Change the declaration of jobsArray from NSArray to NSMutableArray.
Add an initialization at the beginning point of fetchedData method like follows.
if(!jobsArray) {
jobsArray = [NSMutableArray array];
}
else {
[jobsArray removeAllObjects];
}
Remove the following line.
jobsArray = [jobsInfo objectForKey:#"results"];
Instead of that, add the initialized object to the array at the end of for loop.
[jobsArray addObject:jobby];
Add a [tableView reloadData]; at the end of your *-(void)fetchedData:(NSData )responseData; method implementation.
Initially when you are loading the view, tableView will get populated. After you received the data, tableView will not be known that it is received.
Everything else seems good. Hope rest will work fine.
I am trying to build my first iOS app that parses json from a web service.
In my .h file i create an array
NSArray *items;
In my .m file i call the website and store the data into the array. This all goes fine except eventually I am trying to display the data in a uitableview.
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"ItemsCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
NSLog(#"%#",items);
NSDictionary *item = [items objectAtIndex:indexPath.row];
NSString *title = [item objectForKey:#"title"];
cell.title.text = title;
return cell;
}
The nslog of items produces:
{
category = code;
keyword = "";
limit = 20;
lowPrice = "";
page = 0;
products = (
{
description = "...";
mobileFriendly = 1;
popularity = 2021;
productId = code;
title = "title";
}, and so on...
)
I am getting an error trying to do NSDictionary *item = [items objectAtIndex:indexPath.row]; It says doing objectAtIndex:indexPath.row is invalid.
What am I doing wrong?
Thanks for your help!
The value stored in items is an instance of NSDictionary, but you're sending it an NSArray message. Also, the code you posted is referring to gift and ignoring the item anyway.
The array you're looking for is actually stored under the key products inside the items dictionary, so you need to do something like this:
NSArray *products = [items objectForKey:#"products"];
NSDictionary *product = [products objectAtIndex:indexPath.row];
// Then use the product, instead of using 'gift' (whatever that is).
NSString *title = [product objectForKey:#"title"];
items is not a NSArray - it is a NSDictionary. so it has no objectAtIndexPath: method.
Merged with How to copy TableView cell data to a NSMutable Array?.
I'm quite new to iphone development. I created To-Do List app using coredata.
I want to add all the names from "oneHero" manageObject to a NSMutable array (that means name1 to 1st index position of MutableArray , name2 to 2nd index position of Array)
this is my table view cellfor indexpath method
- (UITableViewCell *)tableView:(UITableView *)theTableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *HeroTableViewCell = #"HeroTableViewCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:HeroTableViewCell];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:HeroTableViewCell] autorelease];
}
NSManagedObject *oneHero = [self.fetchedResultsController objectAtIndexPath:indexPath];
NSInteger tab = [tabBar.items indexOfObject:tabBar.selectedItem];
switch (tab) {
case kByName:
cell.textLabel.text = [oneHero valueForKey:#"name"];
cell.detailTextLabel.text = [oneHero valueForKey:#"secretIdentity"];
break;
case kBySecretIdentity:
cell.detailTextLabel.text = [oneHero valueForKey:#"name"];
cell.textLabel.text = [oneHero valueForKey:#"secretIdentity"];
default:
break;
}
//listData = [[[NSMutableArray alloc] init]autorelease];
//if(indexPath.row==1){
//[listData addObject: [oneHero valueForKey:#"secretIdentity"]];
return cell;
}
Actually what I want to do is, retrieve all the names(those are location names) from my "oneHero" object and then show those locations in a mapView. That's why I want to copy those names in to seperate NSMutable array or just as Strings
Can you please give me a cording help . . .
I have a preferences view which shows a different table view depending on which Segmented Control is clicked.
I hard coded some NSMutableArrays to test basic principles:
prefsIssuesList = [[NSMutableArray alloc] init];
[prefsIssuesList addObject:#"Governance"];
[prefsIssuesList addObject:#"Innovation and technology"];
...etc
prefsIndustriesList = [[NSMutableArray alloc] init];
[prefsIndustriesList addObject:#"Aerospace and defence"];
... etc
prefsServicesList = [[NSMutableArray alloc] init];
[prefsServicesList addObject:#"Audit and assurance"];
...etc
currentArray = [[NSMutableArray alloc] init];
currentArray = self.prefsIssuesList;
Then reload the tableview with currentArray, adding a UITableViewCellAccessoryCheckmark.
Everything works fine.
But now I want to store wether the checkmark is on or off in a pList file, and read this back in.
Ideally want to a plist like this
Root Dictionary
Issues Dictionary
Governance Number 1
Innovation and technology Number 0
etc
I've got as far as working this out
// Designate plist file
NSString *path = [[NSBundle mainBundle] pathForResource: #"issues" ofType:#"plist"];
// Load the file into a Dictionary
NSDictionary *dict = [[NSDictionary alloc] initWithContentsOfFile:path];
self.allNames= dict;
[dict release];
NSLog(#"Dict is %#", allNames); // All the data in the pList file
NSMutableArray *issueSection = [allNames objectForKey:#"Issues"];
NSLog(#"Issues is %#", issueSection); // The data is the Issues Section
NSString *issueVal = [issueSection objectForKey:#"Governance"];
NSLog(#"Governance is %#", issueVal); //The value of the Governance key
But what I really want to do is loop through the Issues Dictionary and get the key/value pairs so
key = cell.textLabel.text
value = UITableViewCellAccessoryCheckmark / UITableViewCellAccessoryNone
depending wether it's 1 or 0
I'm assuming that I can still assign one of the three NSMutableArrays to currentArray as I did in the hardcoded version, and use currentArray to reload the tableview.
Then amend this code to build the tableview
NSUInteger section = [indexPath section];
NSUInteger row = [indexPath row];
NSString *key = [keys objectAtIndex:section];
NSArray *nameSection = [names objectForKey:key];
static NSString *CellIdentifier = #"Cell";
//UITableViewCell *cell = [self.prefsTableView dequeueReusableCellWithIdentifier:SectionsTableIdentifier];
UITableViewCell *cell = [self.prefsTableView dequeueReusableCellWithIdentifier:CellIdentifier];
if(cell == nil) {
cell=[[[UITableViewCell alloc]
initWithFrame:CGRectZero
reuseIdentifier: CellIdentifier] autorelease];
}
cell.textLabel.text = [nameSection objectAtIndex:row];
return cell;
But my brain has melted, I've spent about six hours today reading up on pLists, NSArrays, NSMutableDisctionaries, standardUserDefaults to little avail.
I've managed to UITableViews inside UINavigationViews, use SegmentedControls, download asynchronous XML, but now I'm finally stuck, or fried, or both. Over what should be fairly simple key/value pairs.
Anyone care to give me some idiot pointers?
Typing it out led to another post with that one little word I needed to get me back on track :)
Use key/value pairs in a pList to stipulate the name of the cell and wether it was selected or not by the user.
plist is based on a structure like this
Root Dictionary
Services Dictionary
Peaches String 1
Pumpkin String 0
Here's how I grabbed three Dictionary arrays from a pList and used the key/value pairs to reload a tableview depending on which segmentControl was touched:
- (void)viewDidLoad {
[super viewDidLoad];
// Designate plist file
NSString *path = [[NSBundle mainBundle] pathForResource: #"issues" ofType:#"plist"];
// Load the file into a Dictionary
NSDictionary *dict = [[NSDictionary alloc] initWithContentsOfFile:path];
self.allNames= dict;
[dict release];
// Create the Named Dictionaries from Dictionary in pLIst
NSMutableDictionary *allIssues = [self.allNames objectForKey:#"Issues"];
self.prefsIssuesList = allIssues;
[allIssues release];
NSMutableDictionary *allIndustries = [self.allNames objectForKey:#"Industries"];
self.prefsIndustriesList = allIndustries;
[allIndustries release];
NSMutableDictionary *allServices = [self.allNames objectForKey:#"Services"];
self.prefsServicesList = allServices;
[allServices release];
// Assign the current Dictionary to out placeholder Dictionary
currentDict = [[NSMutableDictionary alloc] init];
currentDict = self.prefsIssuesList;
}
Then styling the table cells
- (UITableViewCell *)tableView:(UITableView *)prefsTableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
NSUInteger row = [indexPath row];
NSArray *keysArray = [self.currentDict allKeys];
NSString *theKey = [keysArray objectAtIndex:row];
NSString *theValue = [self.currentDict objectForKey: [keysArray objectAtIndex:row]];
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [self.prefsTableView dequeueReusableCellWithIdentifier:CellIdentifier];
if(cell == nil) {
cell=[[[UITableViewCell alloc]
initWithFrame:CGRectZero
reuseIdentifier: CellIdentifier] autorelease];
}
cell.textLabel.text = theKey;
if (theValue == #"0") {
cell.accessoryType = UITableViewCellAccessoryNone;
}else {
cell.accessoryType = UITableViewCellAccessoryCheckmark;
}
return cell;
}
The if clause at the end doesn't seem to be working, I'll post that as a new question (unless anyone comments quickly!)
Finally the segmentControls assign the different dictionaries to the placeholder array and reload the tableview
This took me a very long day to figure out (as a noobie) so I hope it helps someone
-(IBAction) segmentedControlIndexChanged{
switch (self.segmentedControl.selectedSegmentIndex) {
case 0:
//currentArray = self.prefsIssuesList;
currentDict = self.prefsIssuesList;
break;
case 1:
//currentArray = self.prefsIndustriesList;
currentDict = self.prefsIndustriesList;
break;
case 2:
//currentArray = self.prefsServicesList;
currentDict = self.prefsServicesList;
break;
default:
//currentArray = self.prefsIssuesList;
currentDict = self.prefsIssuesList;
break;
}
[prefsTableView reloadData];
}
Shout if there's a neater or better way of d
Hi I have an array of strings separated with a delimeter ":". I tried separating strings using componentsSeparatedByString method and then save the result into an array and later use that array to produce the desired output, but it didn't worked.
For example
Now my UITableView displays cells as:
Case 1:
How:Many
Too:Many
Apple:Milk
iPhone:Simulator
I want the cells to be displayed on UITableView as:
Case 2:
Many How
Many Too
Milk Apple
Simulator iPhone
This is my cellForRowAtIndexPath method:
- (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 *entry=[entryKeys objectAtIndex:[indexPath section]];
NSArray *entrySection=[entries objectForKey:entry];
cell.textLabel.text=[entrySection objectAtIndex:[indexPath row]]
}
return cell;
}
The output of the above method is case 1 but I want the output to be case 2
entryKeys has keys from A-Z and entry section has values sorted and listed for respective keys i.e. entries starting with A grouped under key A so on...
It may sound silly but I am still learning..please help me
There are numerous ways to do this. Here's one;
// get your raw text in the form of "AAA:BBB"
NSString *rawText = [entrySection objectAtIndex:[indexPath row]];
// split the text by the : to get an array containing { "AAA", "BBB" }
NSArray *splitText = [rawText componentsSeparatedByString:#":"];
// form a new string of the form "BBB AAA" by using the individual entries in the array
NSString *cellText = [NSString stringWithFormat:#"%# %#", [splitText objectAtIndex:1], [splitText objectAtIndex:0]];
Hope that helps.
Wouldn't stringByReplacingOccurrencesOfString:withString: be easier?