so I have a rather complicated plist system. Here is a image showing the data structure.
Is is possible to sort the whole 'Staff' array by the strings with the key 'name' that are nested inside these dictionaries? The strings will of course have values.
You need to get that staff NSArray first, And sort it using NSSortDescriptor like usual
Here's my code
NSString *plistPath = [[NSBundle mainBundle] pathForResource:#"Contacts" ofType:#"plist"];
NSDictionary *contacts = [NSDictionary dictionaryWithContentsOfFile:plistPath];
NSArray *staff = [contacts objectForKey:#"Staff"];
NSSortDescriptor *sortDesc = [[NSSortDescriptor alloc] initWithKey:#"name" ascending:YES];
NSLog(#"%#", [staff sortedArrayUsingDescriptors:[NSArray arrayWithObject:sortDesc]]);
Thanks
Related
I have an array of NSManagedObject's and I want to copy them to a new array in order to manipulate them and not save the changes after the user is done.
The array:
var origQuestions: [Questions]?
This is how I retreive the data from CoreData:
self.origQuestions = MainDb.sharedInstance.randomQuestions(entity: "Questions", count: self.questionToShow)
This is what I need in Objective-C, but I want to know how to do so in Swift 4:
NSMutableArray *questionsCopy = [[NSMutableArray alloc] initWithArray:self.origQuestions copyItems:YES];
To translate that Objective-C code into Swift you do:
var questionsCopy = NSArray(array: origQuestions, copyItems:true) as! [Questions]
But since you declared origQuestions as optional, it needs to be:
var questionsCopy = origQuestions != nil ? NSArray(array: origQuestions!, copyItems:true) as? [Questions] : nil
Whether that fully works (Objective-C or Swift) with NSManagedObject or not is another question. See How can I duplicate, or copy a Core Data Managed Object? and its Swift answers for code that specifically covers doing deep copies of NSManagedObject instances.
My PFUser subclass contains a column which is an array of pointers. When showing the [PFUser currentUser] profile page, the array objects are not included and calling
[[PFUser currentUser fetchIfNeededInBackground]
won't fetch the pointer objects either.
If the column was a single pointer, I could call
[currentUser[#"pointerColumn"] fetchIfNeedInBackground]
but the method's argument is a PFObject and not an Array of Pointers.
I can call fetchIfNeededInBackgroundWithBlock for every object in the array, but that makes many requests for a single column in the PFUser class.
for (PFObject * obj in currentUserArrayOfPointers) {
[obj fetchIfNeededInBackgroundWithBlock:^(PFObject *object, NSError *error){
[self.tableView reloadData];
}];
}
Is there a better way to fetch [PFUser currentUser]'s array of pointers column?
(And keep the behavior of "fetchIfNeeded", which avoids making a new query each time if the object was already fetched.)
What you can do is get all the objectIds in your currentUserArrayOfPointers and then do a parse query with this parameter:
NSMutableArray *userObjectIds = [[NSMutableArray alloc] init];
for (PFObject * obj in currentUserArrayOfPointers) {
[userObjectIds add:object.objectId];
}
PFQuery *query = [PFQuery queryWithClassName:#"SomeClass"];
[query whereKey:#"objectId" containedIn:userObjectIds];
[query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error {
...
}];
This way you'll be able to get all the users with one query.
I know this has been asked a million times, but I've been making a mess...
So basically what I'm trying to do is send an object from a details view to a favorites view with all of it's properties.
I've already got a button working to add a string [one property of the object] to favorites
button pressed code:
- (void)buttonPressed:(id) sender
{
NSMutableArray *favss = [[[NSUserDefaults standardUserDefaults] objectForKey:#"Favorite"]mutableCopy];
if(favss != nil)
{
NSLog(#"Array found. Contents: %#",favss);
}
else
{
favss = [[NSMutableArray alloc] initWithCapacity:0];
}
[favss addObject:self.word.head];
[[NSUserDefaults standardUserDefaults] setObject:favss forKey:#"Favorite"];
[[NSUserDefaults standardUserDefaults] synchronize];
NSLog(#"Number of items in my array is: %d", [favss count]);
}
my object is stored in it's own class:
#interface Words : NSObject {
NSString *head;
NSString *pro;
NSString *def;
}
#property(nonatomic, copy) NSString *head;
#property(nonatomic, copy) NSString *pro;
#property(nonatomic, copy) NSString *def;
when trying to run [favss addObject:self.word] the app obviously freaked out because objects can't be added to NSUserDefaults -- so I tried NSCoding but that turned my entire details view BLACK -- I've tried sending my three strings separately and that's fine but then they are all completely separated which kind of defeats the purpose -- and I somehow end up completely jacking up my arrays with all the different code I've been trying because now I keep getting this error:
Array found. Contents: <62706c69 73743030 d4010203 0405081d 1e542474 6f705824 6f626a65 63747358 24766572 73696f6e 59246172 63686976 6572d106 0754726f 6f748001 a6090a13 14151655 246e756c 6cd40b0c 0d0e0f10 11125468 65616456 24636c61 73735370 726f5364 65668002 80058003 8004615d f4536261 316f10cd 005b0070 00612075 2075005d 00202460 7c98003b 00208d34 002025b7 59277ea2 559c62a5 ff5e4e0a 58993002 24615207 54080020 25b77b54 662f7b54 5f978d77 ff0c5c31 60154e0d ff5e9898 30022462 63287740 002025b7 524d4e0d ff5e6751 ff0c540e 4e0dff5e 5e973002 24639644 7740003b 00208ddf 968f0020 25b7674e 5f3a83ab 5f977968 ff0cff5e 50127535 5f719662 76848001 738b5165 4e86573a 30022464 62767740 002025b7 624bff5e 95e8678b 5f805916 770b3002 24656cbf 7740003b 0020987a 77400020 25b74f60 ff5e6cb3 8fb95f80 4e0b8d70 ff0c4e0d 8fdc5c31 662f4e5d 773c6865 30022466 4eb28fd1 002025b7 4f607231 5a03513f ff0c5a03 513f5c31 ff5e4f60 30022467 72758fde 002025b7 90a35e74 5b506211 72385173 8fdb0020 201c725b 68da201d ff0c5f20 53d453d4 89c15230 62118fde 740690fd 4e0d7406 ff0c751f 6015628a 4ed6ff5e 50124e86 30022468 5df47ed3 002025b7 4f604ee5 4e3a628a 79d1957f ff5e5012 5c316709 597d5904 55e6003f 00202469 7167987e 003a0020 89c10020 201c5df4 5bb6201d 3002d217 18191c58 24636c61 73736573 5a24636c 6173736e 616d65a2 1a1b5557 6f726473 584e534f 626a6563 7455576f 72647312 000186a0 5f100f4e 534b6579 65644172 63686976 65720008 00110016 001f0028 00320035 003a003c 00430049 00520057 005e0062 00660068 006a006c 006e0071 00750212 02170220 022b022e 0234023d 02430248 00000000 00000201 00000000 0000001f 00000000 00000000 00000000 0000025a>
Basically, I just want my button to add the object that is being displayed in the details view into an array that is passed into NSUserDefaults to be displayed in a table view on the other side (which can then be selected to display the details of each object again)...and I know it's been asked a lot but...well, I can't even display my array at the moment...
If I understand you correctly, you need to store an array of objects (Word) that has 3 values (head, pro, def).
I suggest you store those three values in an NSDictionary:
head="xxx"
pro="yyy"
def="zzz"
and then you store this NSDictionary in an array, which is then stored in NSUserDefaults.
If you are adamant in storing your custom objects, you need to expand them a little.
The answer to this SO questions should get you there:
How to store custom objects in NSUserDefaults
i did it like this in the end:
- (void)apopbuttonPressed:(id) sender
{
NSMutableArray *myfavs = [[[NSUserDefaults standardUserDefaults] objectForKey:#"MyFavoritez"]mutableCopy];
if(myfavs != nil)
{
NSLog(#"Array found. Contents: %#",myfavs);
}
else
{
myfavs = [[NSMutableArray alloc] initWithCapacity:0];
}
NSUserDefaults *currentDefaults = [NSUserDefaults standardUserDefaults];
NSData *dataRepresentingSavedArray = [currentDefaults objectForKey:#"MyFavoritez"];
if (dataRepresentingSavedArray != nil)
{
NSArray *oldSavedArray = [NSKeyedUnarchiver unarchiveObjectWithData:dataRepresentingSavedArray];
if (oldSavedArray != nil)
_myfavs = [[NSMutableArray alloc] initWithArray:oldSavedArray];
else
_myfavs = [[NSMutableArray alloc] init];
}
[_myfavs addObject:self.word];
[[NSUserDefaults standardUserDefaults] setObject:[NSKeyedArchiver archivedDataWithRootObject:_myfavs] forKey:#"MyFavoritez"];
[[NSUserDefaults standardUserDefaults] synchronize];
NSLog(#"Number of items in my array is: %d", [_myfavs count]);
// [self performSegueWithIdentifier:#"passFavs" sender:favs];
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([[segue identifier] isEqualToString:#"passFavs"]) {
FavViewController *con = segue.destinationViewController;
con.myFavsTwo = _myfavs; }
}
and
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
myFavsTwo = [NSKeyedUnarchiver unarchiveObjectWithData:[[[NSUserDefaults standardUserDefaults] objectForKey:#"MyFavoritez"] mutableCopy]];
[self.tableView reloadData];
NSLog(#"Number of items in my array is: %d", [myFavsTwo count]);
}
in case anyone else runs into similar issues
I have one NSMutableArray which containing duplicates value e.g.[1,2,3,1,1,6]. I want to remove duplicates value and want new array with distinct values.
two liner
NSMutableArray *uniqueArray = [NSMutableArray array];
[uniqueArray addObjectsFromArray:[[NSSet setWithArray:duplicateArray] allObjects]];
My solution:
array1=[NSMutableArray arrayWithObjects:#"1",#"2",#"2",#"3",#"3",#"3",#"2",#"5",#"6",#"6",nil];
array2=[[NSMutableArray alloc]init];
for (id obj in array1)
{
if (![array2 containsObject:obj])
{
[array2 addObject: obj];
}
}
NSLog(#"new array is %#",array2);
The output is: 1,2,3,5,6..... Hope it's help you. :)
I've made a category on NSArray with this method in :
- (NSArray *)arrayWithUniqueObjects {
NSMutableArray *newArray = [NSMutableArray arrayWithCapacity:[self count]];
for (id item in self)
if (NO == [newArray containsObject:item])
[newArray addObject:item];
return [NSArray arrayWithArray:newArray];
}
However, this is brute force and not very efficient, there's probably a better approach.
If the order of the values is not important, the easiest way is to create a set from the array:
NSSet *set = [NSSet setWithArray:myArray];
It will only contain unique objects:
If the same object appears more than once in array, it is added only once to the returned set.
If you are worried about the order, check this solution
// iOS 5.0 and later
NSArray * newArray = [[NSOrderedSet orderedSetWithArray:oldArray] array];
NSSet approach is the best if you're not worried about the order of the objects
uniquearray = [[NSSet setWithArray:yourarray] allObjects];
In a tableView I have the following:
NSDictionary *cat = [category objectAtIndex:indexPath.row];
cell.textLabel.text = [cat valueForKey:#"reference"];
This populates the tableView with the content of the array from an XML file.
There is another array “data” that prints out the content to the debug console and I want to populate another view with this content. But I am having lot of trouble populating the next view with the data array.
NSLog(#"cellForRowAtIndexPath-- Reference:%#: Verse:%#", [cat valueForKey:#"reference"], [cat valueForKey:#"data"]);
The didSelectRowAtIndexPath method looks like this:
Verse *vvc = [[Verse alloc] initWithNibName:#"VerseView" bundle:nil]; vvc.verses = [[category objectAtIndex:indexPath.row] valueForKey:#"verse"];
[self.navigationController pushViewController:vvc animated:YES];
[vvc release];
[tableView deselectRowAtIndexPath:indexPath animated:YES];
In the cellForRowAtIndexPath of the next view I have the following:
NSDictionary *cat = [verses objectAtIndex:indexPath.row];
cell.textLabel.text = [cat valueForKey:#"data"];
What I would like is to have the “data” in a textView.
I don’t know what’s wrong. Any help would be appreciated!