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
Related
object-C style
#interface TestViewController:UIViewController{
NSArray *dataList;
}
#end
#implementation TestViewController
- (void)viewDidLoad
{
[super viewDidLoad];
NSDictionary *dict1 =[[NSDictionary alloc] initWithObjectsAndKeys:#"32",#"age",#"andy",#"name", nil];
NSDictionary *dict1 =[[NSDictionary alloc] initWithObjectsAndKeys:#"34",#"age",#"smith",#"name", nil];
NSDictionary *dict1 =[[NSDictionary alloc] initWithObjectsAndKeys:#"27",#"age",#"jonathan",#"name", nil];
dataList = [[NSArray alloc]initWithObjects:dict1,dict2,dict3,nil];
}
#end
I want to make same code in Swift
so I typed swift style as follows
class ViewController: UIViewController {
var datalist = [Dictionary]() //Compile Error -> "Missing argument for parameter #1 in call"
// I can't understand error. What does it mean?
override func viewDidLoad() {
super.viewDidLoad()
let dict1 = ["age":"32","name":"andy"]
let dict2 = ["age":"34","name":"smith"]
let dict3 = ["age":"27","name":"jonathan"]
datalist = [dict1,dict2,dict3] //Compile Error -> 'ViewController' does not have a member named 'datalist'
}
}
but 2 Error
I don't know why issue error
Can you help me?
Arrays in swift do not take a parameter, you just create one by setting the array equal to [] (with or without values), for example:
var array : [Int] = []
var array2 = [1,2,3]
would create an array of integers.
Also, Dictionaries in swift need to know the types of the key and value, for example:
Dictionary<String, String>
But there is also a shorthand for creating dictionaries that looks like:
[String:String]
(Assuming String is the type for your key and value).
So for your example, you could rewrite your datalist object to be declared as:
var datalist : [[String:String]] = []
Then you can use the datalist object in the way you are using it, or by appending [String:String] objects to it.
I'm hoping to pass data of a selected row to a second viewcontroller with segue. The results that fill the first viewcontroller tableview are an array. In the segue I'm using:
if ([[segue identifier] isEqualToString:#"detailSegue"]) {
//
DetailVC *dvc = (DetailVC *)[segue destinationViewController];
NSIndexPath *indexPath = [self.resultsVC indexPathForSelectedRow];
Car *selectedCar = (Car *) [self.results objectAtIndex:indexPath.row];
dvc.currentCar = selectedCar;
When I perform segue I get the error:
[NSKnownKeysDictionary1 carName]: unrecognized selector sent to instance
From the research I've done on this topic I do include something similar to the line:
[fetchRequest setResultType:NSDictionaryResultType]
Which when deleted has helped others. I'll need to keep it for my code.
How can I pass data of the selected row to the second viewcontroller?
Update 8JULY
The code i'm using to construct the array is from a fetchrequest. The array row currently displays an integer and carName.
NSArray* results = [context executeFetchRequest:r error:&error];
NSSortDescriptor* sd = [NSSortDescriptor sortDescriptorWithKey:#"number" ascending:NO];
results = [results sortedArrayUsingDescriptors:#[sd]];
self.results = results;
Is the issue that I'm pointing the segue to search Car* rather than this array output?
Update 12JULY
Following suggestions of Aubada Taljo I removed reference of Car* and add the following to the segue:
dvc.selectedCar = [self.results objectAtIndex:indexPath.row];
and declared NSDictionary in my detailVC.
If you are sure the problem is here, then are you sure self.results contain objects of type Car*?
I would suggest you check in the variables watcher that it contains objects of type Car* because it seems you are requesting the property carName from an object of another type.
I am making a calorie counter and I have created an UIAlertView which gives me list of food items. I have made a NSMutableDictionary containing the food and the calories:
#implementation FoodDatabase
-(id)init
{
self = [super init];
if(self)
{
food= [[NSMutableDictionary alloc] init];
[food setObject:#"111" forKey:#"Rice"];
}
return self;
}
-(NSString *) foodList: (NSString *) foodItem
{
for(NSString *key in [food allKeys])
{
if([foodItem isEqual: key])
{
NSLog(#"%#",foodItem);
return [food objectForKey:foodItem];
}
}
}
#end
In another class, I have created an UIAlertView which gives a list of food items. This is the code snippet for the item Rice:
NSString *buttonTitle = [alertView buttonTitleAtIndex:buttonIndex];
if([buttonTitle isEqualToString:#"Rice"])
{
NSString *xyz = [foodData foodList: #"Rice"];
food_calorie = ([xyz floatValue]);
UIAlertView *rice_alert=[[UIAlertView alloc] initWithTitle:#"Enter quantity of rice consumed" message:#"100 gms = 111 calories" delegate:self cancelButtonTitle:#"Cancel" otherButtonTitles:#"Ok", nil];
[rice_alert addTextFieldWithValue:#"" label:#"Enter quantity in gms"];
RiceText = [rice_alert textFieldAtIndex:0];
RiceText.keyboardType = UIKeyboardTypeNumberPad;
RiceText.clearsOnBeginEditing = YES;
RiceText.clearButtonMode = UITextFieldViewModeWhileEditing;
RiceText.keyboardAppearance = UIKeyboardAppearanceAlert;
rice_alert.tag = RiceAlertView;
[rice_alert show];
[rice_alert release];
}
I calculate the total calories by using the value entered by the user in the _RiceText_ and the value of the _object_ returned for a specific key (in this case rice). But it seems not to be returning the value of the _object_ as the NSLog shows _(null)_ for the value of _xyz_. Where am I going wrong??
The whole error is that the object foodData isn't initialized properly. So, initialize it
A nice documentation - https://developer.apple.com/library/ios/documentation/cocoa/reference/foundation/Classes/NSObject_Class/Reference/Reference.html
& fetching data from NSmutableDictionary
https://developer.apple.com/library/ios/documentation/cocoa/reference/foundation/Classes/NSDictionary_Class/Reference/Reference.html#//apple_ref/occ/instm/NSDictionary/objectForKey:
Remember the key that you use to compare in dictionary should have same casing (capital - small) as defined earlier. e.g You store an object for key 'example' but you can not retrieve it using ''Example' or 'EXAMPLE'. You can only use 'example' as defined earlier. And
You don't need to get arrays of keys from dictionary & fast-enumerate it
You can just get the object using objectForKey: method. Good luck.
I am trying to implement a simple drag and drop operation in a tableView. However, when I try to retrieve the data from the pasteboard using readObjectsForClasses, I get a runtime exception saying
"[__NSCFConstantString initWithBytes:length:encoding:]: unrecognized selector sent to instance "
This is my acceptDrop method where the problem occurs. Can someone please help point out what I am doing wrong.
(BOOL) tableView: (NSTableView *) view
acceptDrop: (id ) info
row: (NSInteger) row
dropOperation: (NSTableViewDropOperation) op
{
NSArray *pBoardClasses = [[NSArray alloc] initWithArray:[NSArray arrayWithObjects:[NSStringPboardType class], [NSDragPboard class], nil]];
NSPasteboard *board =[info draggingPasteboard];
if(![board canReadObjectForClasses:pBoardClasses options:nil])
{
NSLog(#"No acceptable data format in pasteboard. Cannot perform this operation!");
return NO;
}
NSArray * dFromPboard = [board readObjectsForClasses:pBoardClasses options:nil];
}
use [NSString class] instead of [NSStringPboardType class]
also: [NSDragPboard class] looks like it's not right. Remove this and test if it works with [NSString class] only.
NSArray *stringObjects = [pboard readObjectsForClasses:#[ [NSString class], [NSAttributedString class] ] options:#{}];
if(stringObjects.count > 0) {
NSString *myStr = stringObjects[0];
//…
}
//…
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!