I have a singleton with an NSMutableDictionary in it. I want to add an entry to that dictionary from one of my views. For a reason that I can't comprehend it's not working and I'm receiving the 'NSDictionary setObject:forKey: unrecognized selector sent to instance' error. This doesn't seem like it should be so hard but I can't find an answer to the problem.
So I've wired up a button in my .xib to call the createKey method and kablooey. I've also tested to ensure that the dictionary exists and it does.
Here's my singleton header:
#import <Foundation/Foundation.h>
#interface SharedAppData : NSObject <NSCoding>
{
NSMutableDictionary *apiKeyDictionary;
}
+ (SharedAppData *)sharedStore;
#property (nonatomic, copy) NSMutableDictionary *apiKeyDictionary;
-(BOOL)saveChanges;
#end
My singleton implementation (important bits)
#interface SharedAppData()
#end
#implementation SharedAppData
#synthesize apiKeyDictionary;
static SharedAppData *sharedStore = nil;
+(SharedAppData*)sharedStore {
#synchronized(self){
if(sharedStore == nil){
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *testFile = [documentsDirectory stringByAppendingPathComponent:#"testfile.sav"];
Boolean fileExists = [[NSFileManager defaultManager] fileExistsAtPath:testFile];
if(fileExists) {
sharedStore = [NSKeyedUnarchiver unarchiveObjectWithFile:testFile];
}
else{
sharedStore = [[super allocWithZone:NULL] init];
}
[sharedStore setSaveFile:testFile];
}
return sharedStore;
}
}
- (id)init {
if (self = [super init]) {
apiKeyDictionary = [[NSMutableDictionary alloc] init];
}
return self;
}
In my view controller header...
#import <UIKit/UIKit.h>
#import "SharedAppData.h"
#interface AddKeyViewController : UIViewController <UITextFieldDelegate>
{
UIButton *addKey;
}
#property (weak, nonatomic) IBOutlet UITextField *apiName;
#property (weak, nonatomic) IBOutlet UITextField *apiKey;
-(IBAction)createKey:(id)sender;
#end
View controller implementation:
#import "AddKeyViewController.h"
#import "SharedAppData.h"
#interface AddKeyViewController ()
#end
#implementation AddKeyViewController
#synthesize apiName, apiKey, toolbar;
-(IBAction)createKey:(id)sender {
NSString *name = [apiName text];
NSString *key = [apiKey text];
[[[SharedAppData sharedStore] apiKeyDictionary] setObject:key forKey:name];
}
#end
Your apiKeyDictionary property is set to copy. That will send the copy message to the NSMutableDictionary instance you create in your init method - returning not an NSMutableDictionary but an NSDictionary. Change it to strong or retain instead.
I suspect that the problem is with your property being "copy" rather than "strong"; when you set it, mutanle dictionsry gets copied into an immutable one.
Try changing your property to "strong".
Related
I have old project written on Objective-C. Need to do migration to Realm.
I created several objects/classes inheritance from RLMObject. When I do fetching objects only with one main object type (ConnectionRealm) - working fine, but if I do add (only add, not include, not use) to project two or more another classes (inheritance from RLMObject), like as FloorRealm class, APP crash on [ConnectionRealm allObjects] without any errors.
Also ConnectionRealm contains RLMArray of FloorRealm. App still crashing.
(Can`t solve and understand this few days.) Thanks.
Connection Model:
#import <Foundation/Foundation.h>
#import <Realm/Realm.h>
#import "FloorRealm.h"
#interface ConnectionRealm : RLMObject
#property int connectionID;
#property NSString *name;
#property NSString *localIPAddress;
#property NSString *localPort;
#property NSString *remoteIPAddress;
#property NSString *remotePort;
#property NSString *userName;
#property NSString *password;
#property NSString *deviceID;
#property RLMArray <FloorRealm *> *floors;
- (instancetype)initWith:(NSString *)name
localIP:(NSString *)localIPAddress
localPort:(NSString *)lPort
remoteIP:(NSString *)remoteIPAddress
remotePort:(NSString *)rPort
userName:(NSString *)userName
password:(NSString *)password
deviceID:(NSString *)deviceID;
#end
#import "ConnectionRealm.h"
#implementation ConnectionRealm
- (instancetype)initWith:(NSString *)name
localIP:(NSString *)localIPAddress
localPort:(NSString *)lPort
remoteIP:(NSString *)remoteIPAddress
remotePort:(NSString *)rPort
userName:(NSString *)userName
password:(NSString *)password
deviceID:(NSString *)deviceID {
if (self = [super init]) {
self.connectionID = [self incrementID];
self.name = name;
self.localIPAddress = localIPAddress;
self.localPort = lPort;
self.remoteIPAddress = remoteIPAddress;
self.remotePort = rPort;
self.userName = userName;
self.password = password;
self.deviceID = deviceID;
}
return self;
}
+ (NSString *)primaryKey { return #"connectionID"; }
- (int)incrementID {
RLMResults *objects = [ConnectionRealm allObjects];
return self.connectionID = [[objects maxOfProperty:#"connectionID"] intValue] + 1;
}
#end
FloorModel:
#import <Realm/Realm.h>
#interface FloorRealm : RLMObject
#property int floorID;
#property NSInteger floorNumber;
#property NSString *floorName;
- (instancetype)initWith:(NSInteger)floorNumber floorName:(NSString *)name;
#end
RLM_ARRAY_TYPE(FloorRealm)
#import "FloorRealm.h"
#implementation FloorRealm
- (instancetype)initWith:(NSInteger)floorNumber floorName:(NSString *)name {
if (self = [super init]) {
self.floorID = [self incrementID];
self.floorNumber = floorNumber;
self.floorName = name;
}
return self;
}
+ (NSString *)primaryKey { return #"floorID"; }
- (int)incrementID {
RLMResults *objects = [FloorRealm allObjects];
return self.floorID = [[objects maxOfProperty:#"floorID"] intValue] + 1;
}
#end
[SOLVED]
RLM_ARRAY_TYPE(FloorRealm) need put on ConnectionRealm in .h after #includes. But in official docs written another.
Also: #property RLMArray <FloorRealm *><FloorRealm> *floors; instead of #property RLMArray <FloorRealm *> *floors;
I created test project with the same models and seed all errors. Strange, but in original project Xcode not showing this errors.
I have a NSMutableaArray of NSString objects. So i'm using NSKeyedArchiever to save it to disk. So when i try to use
- (void)encodeWithCoder:(NSCoder *)aCoder {
[aCoder encodeObject:self.EventsList forKey:#"Events"];
}
i got an error
Event encodeWithCoder:]: unrecognized selector sent to instance 0x7fd06b542780
Here's my parts of code:
//-------------------Events.h--------------------------
#interface Event : NSObject
#property (strong,nonatomic) NSString *nameOfEvent;
#property (strong,nonatomic) NSString *dateOfEvent;
#property (strong,nonatomic) NSString *placeOfEvent;
#property int priorityOfEvent;
#end
//---------------Singleton.h ----------------
#interface GlobalSingleton : NSObject <NSCoding, NSCopying> {
NSMutableArray *EventsList;
}
#property (nonatomic,retain) NSMutableArray *EventsList;
+(GlobalSingleton *)sharedFavoritesSingleton;
#end
//----------------Singleton.m------------------------
....
#implementation GlobalSingleton
#synthesize EventsList;
....
....
- (void)encodeWithCoder:(NSCoder *)aCoder {
NSLog (#"%#",EventsList); // not nil
[aCoder encodeObject:self.EventsList forKey:#"Events"];
}
- (id)initWithCoder:(NSCoder *)aDecoder {
if ((self = [super init])) {
NSMutableArray *temp = [[NSMutableArray alloc] initWithArray:[aDecoder decodeObjectForKey:#"Events"]];
self.EventsList = temp;
}
return self;
}
- (id)copyWithZone:(NSZone *)zone {
GlobalSingleton *copy = [[GlobalSingleton allocWithZone:zone] init];
copy.EventsList = self.EventsList;
return copy;
}
#end
I get textdata from Web-server using ASIFormDataRequest in JSON format, and then i add this object to NSMutableArray, which is also a Singleton, so it looks like this:
NSDictionary *responseDict = [responseString JSONValue];
GlobalSingleton *Singleton = [GlobalSingleton sharedFavoritesSingleton];
for (NSDictionary *str in responseDict) {
Event *newEvent = [[Event alloc] init];
newEvent.nameOfEvent = [str objectForKey:#"EventName"];
newEvent.dateOfEvent = [str objectForKey:#"EventDate"];
newEvent.placeOfEvent = [str objectForKey:#"EventPlace"];
[Singleton.EventsList addObject:newEvent];
}
//------------------Save this data stored in NSMutableArray to disk-------------------------
[NSKeyedArchiver archiveRootObject:Singleton toFile:[self save_path]];
So, again, execution stops on this:
[aCoder encodeObject:self.EventsList forKey:#"Events"];
But when i try to code single NSString object everything goes with no errors.
eventList doesn't contain NSStrings, it contains Event objects.
Your Event class needs to implement encodeWithCoder: - as the exception message says, the Event class doesn't implement this method.
Also you should use a lowercase s for singleton as it is an instance, not a class, and you should probably not use singletons.
Here is my mainAppDelegate.h:
#import <UIKit/UIKit.h>
#interface mainAppDelegate : UIResponder <UIApplicationDelegate>
#property (strong, nonatomic) UIWindow *window;
#property NSMutableArray *toDoItems;
#end
and my mainAppDelegate.m:
#import "mainAppDelegate.h"
#implementation mainAppDelegate
- (void)applicationWillTerminate:(UIApplication *)application
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:#"toDoItems.plist"];
[self.toDoItems writeToFile:filePath atomically:TRUE];
}
#end
I have another file, XYZToDoListViewController.m with the code:
#import "XYZToDoListViewController.h"
#import "XYZToDoItem.h"
#import "XYZAddItemViewController.h"
#interface XYZToDoListViewController ()
#property NSMutableArray *toDoItems;
#end
#implementation XYZToDoListViewController
- (IBAction)unwindToList:(UIStoryboardSegue *)segue
{
XYZAddItemViewController *source = [segue sourceViewController];
XYZToDoItem *item = source.toDoItem;
if (item != nil) {
[self.toDoItems addObject:item];
[self.tableView reloadData];
}
}
- (IBAction)clearData:(UIBarButtonItem *)sender;
{
[self.toDoItems removeAllObjects];
[self.tableView reloadData];
}
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.toDoItems = [[NSMutableArray alloc] init];
self.navigationController.view.backgroundColor =
[UIColor colorWithPatternImage:[UIImage imageNamed:#"bg_full.png"]];
self.tableView.backgroundColor = [UIColor clearColor];
self.tableView.contentInset = UIEdgeInsetsMake(-35, 0, -35, 0);
}
#end
This is at least what I think is relevant. My basic framework is something I followed from this tutorial. So as you can see I have an NSMutableArray named .toDoItems. and I want it to remember the list when I exit the application (not just minimizing it; it does that already. I think I have the code which is saving the data, but what do I use to check if the file exists, and if so, display it?
And would this affect my clearData method when the app resumes as well?
As if i understood true you want to save your NSMutableArray even after restart your app.
So you may use this codes to save your NSMutableArray with NSUserDefaults.
NSUserDefaults *defaults=[NSUserDefaults standardUserDefaults];
[defaultsPhoneId setObject:yourArray forKey:#"yourKey"];
[defaultsPhoneId synchronize];
And it is how you can take it back
yourArray=[[NSMutableArray alloc]initWithArray:[[NSUserDefaults standardUserDefaults]objectForKey:#"yourKey"]];
But dont forget to initialize it before save with NSUserDefaults.
By the way you may check yourArray anytime if it is loaded or not with
if([yourArray count]==0){
//Your array is empty so you have to call it with #"yourKey". (second codes part)
}
"what do I use to check if the file exists"
NSFileManager *fileManager = [NSFileManager defaultManager];
if ([fileManager fileExistsAtPath:your_file_path])
"..and if so, display it?"
Please read about UITableView and UITableViewDataSource
https://developer.apple.com/library/ios/documentation/uikit/reference/UITableView_Class/Reference/Reference.html
"And would this affect my clearData method when the app resumes as well?"
clearData is a button action. It will be called only if user will tap
a button. It is not connected with application launch/stopping.
Im trying to make user role page that get data from login. I created the own delegate function to call the webservice but app getting crash due to-[__NSArrayM setRoleHistorys:]: unrecognized selector sent to instance.
Here is my code: in .m file :
- (void)parserDidStartDocument:(NSXMLParser *)parser
{
nodeContent = [[NSMutableString alloc]init];
}
- (void)parserDidEndDocument:(NSXMLParser *)parser
{
arrayitems = [[NSMutableArray alloc] init];
U serRoleDataParser *userroleParser = [[UserRoleDataParser alloc] init];
// UserRole *currentStudent = (UserRole *) arrayitems;
NSString *Username = username.text;
NSLog(#"the String value%#",Username);
[userroleParser getUserHistoryForIndex:0 LoginId:username.text];
NSLog(#"the String user value %#",username.text);
userroleParser.delegate = self;
}
- (void) didrecieveData : (NSArray *) userHistories forIndex :(int) index
{
arrayitems = [[NSMutableArray alloc] init];
UserRole *roles = (UserRole *) arrayitems;
roles.RoleHistorys = userHistories;
datadisplay.text = roles.role;
NSLog(#"the Success data%#", datadisplay.text);
}
in delegate file .h
#interface UserRole : NSObject
#property (nonatomic,copy) NSString *username;
#property (nonatomic,copy) NSString *role;
#property (nonatomic,copy) NSString *empcode;
#property (nonatomic,copy)NSMutableArray * RoleHistorys;
#end
Dataparser.h file (delegate)
#import <Foundation/Foundation.h>
#import "UserRole.h"
#protocol UserRoleDataParserDelegate <NSObject>
- (void) didrecieveData : (NSArray *) userHistories forIndex :(int) index ;
#end
#interface UserRoleDataParser : NSObject<NSXMLParserDelegate>
{
NSMutableData *xmlData;
NSXMLParser *userroleParser;
NSMutableString *capturedString;
BOOL captureCharacters;
NSMutableArray *userHistories;
}
- (void) getUserHistoryForIndex : (int) index LoginId :(NSString*) loginId;
#property (weak,nonatomic) id <UserRoleDataParserDelegate> delegate;
#property (nonatomic) int index;
#end
am getting output in nslog but the app getting crash.
This code isn't correct:
arrayitems = [[NSMutableArray alloc] init];
UserRole *roles = (UserRole *) arrayitems;
You can't just cast an array to your custom class type (unless you have subclassed NSMutableArray and the instance is actually of the subclass type). You need to create an instance of or find the correct instance you want before you try to use it.
You create NSMutableArray and you cast it to UserRole object, after that you try to save data in that: roles.RoleHistorys :
arrayitems = [[NSMutableArray alloc] init];
UserRole *roles = (UserRole *) arrayitems;
roles.RoleHistorys = userHistories; //<- Error happened here
So you try to save data by calling selector setRoleHistorys on object of type NSMutableArray which you cannot do because NSMutableArray doesn't contain that property.
Let me preface this question by saying that I believe it to be a memory management mistake on my end. I just can't seem to figure out why it is happening.
I have a viewcontroller and a model class named Part.
#import <Foundation/Foundation.h>
#interface Part : NSObject
#property (nonatomic, strong) NSString *name;
#property (nonatomic, strong) NSString *partType;
#property (nonatomic, strong) NSString *description;
#property (nonatomic, strong) NSNumber *price;
- (id)initWithName:(NSString *)name AndType:(NSString *)type;
#end
In the view controller I have a property set as follows:
#property (nonatomic, strong) Part *part;
In the init function of ViewController I create some static arrays and create objects out of them:
- (id)init {
self = [super init];
self.partList = [[NSMutableArray alloc] init];
NSArray *inputArray = #[#"Part1",
#"Part2",
#"Part3",
#"Part4",
#"Part5",
#"Part6",
#"Part7",
#"Part8"];
NSString *tempType = #"PartCategory";
// Add dummy static data
for (int i = 0; i < [inputArray count]; i++) {
Part *partInput = [[Part alloc] initWithName:[inputArray objectAtIndex:i] AndType:tempType];
//partInput.name = [inputArray objectAtIndex:i];
//partInput.partType = tempType;
NSLog(#"Inserting Part %#", partInput);
[self.partList addObject:partInput];
}
return self;
}
The NSLog I call in that loop returns Inserting Part *nil description* for every part. I just can't track down what is happening here.
EDIT: Here is the initWithName method from Part that the controller uses:
- (id)initWithName:(NSString *)name AndType:(NSString *)type {
if(self = [super init]) {
self.name = name;
self.partType = type;
}
return self;
}
When using %# to print NSObject, it calls debugDescription that by default calling the description method of that object and your Part object always have nil description.
You better solve this by changing the description property name to something else, because it conflicts with the description method of NSObject.
See also: NSObject description and debugDescription