I have an NSMutableArray that contains several NSMutableDictionary object, each dict has a NSString and an NSMutableArray in it.
My problem is that I need to find the correct dict based on a string match and when found insert an object into the NSMutableArray in the same dict where the string match was found, I can only make this work the first time when the array is empty because after that I am unable to match the correct string:
Here is what I have tried so far, I tried using contains object but that wont get me inside the dict inside the array so I am stuck
NSMutableArray *variantOptions = [[NSMutableArray alloc] init];
for (NSDictionary *variant in variantInfo) {
NSMutableDictionary *variantOption = [[NSMutableDictionary alloc] init];
NSMutableArray *variantOptionValues = [[NSMutableArray alloc] init];
NSString *name = variant[#"name"];
NSString *value = variant[#"value"];
if(variantOptions.count > 0) {
// Need to loop through the array until name isEquaToString variantOptionName and when true insert value into variantOptionValuesArray in that same dict and if not exists create a new dict and insert in array
} else {
[variantOptionValues addObject:value];
[variantOption setObject:name forKey:#"variantOptionName"];
[variantOption setObject:variantOptionValues forKey:#"variantOptionValues"];
}
[variantOptions addObject:variantOption];
}
for (NSDictionary *variant in variantInfo) {
NSString *name = variant[#"name"];
NSString *value = variant[#"value"];
BOOL found = false;
for (NSMutableDictionary *v in variantOptions) {
if (v[#"name"] isequalToString:name]) {
NSMutableArray *values = v[#"variantOptionValues"];
[values addObject:value];
found = true;
break;
}
}
if (!found) {
// name was not found
NSMutableDictionary *variantOption = [[NSMutableDictionary alloc] init];
NSMutableArray *variantOptionValues = [NSMutableArray alloc] init];
[variantOptionValues addObject:value];
[variantOption setObject:name forKey:#"variantOptionName"];
[variantOption setObject:variantOptionValues forKey:#"variantOptionValues"];
[variantOptions addObject:variantOption];
}
}
Related
I have a horizontally and vertically scrollable table. I get the data for the header and first column from the web service(json). I want to sort the data in ascending order and remove duplicate data from both header and the first column. For removing duplicate values I used the following code:
-(void) requestFinished: (ASIHTTPRequest *) request
{
NSString *theJSON = [request responseString];
SBJsonParser *parser = [[SBJsonParser alloc] init];
NSMutableArray *jsonDictionary = [parser objectWithString:theJSON error:nil];
headData = [[NSMutableArray alloc] init];
NSMutableArray *head = [[NSMutableArray alloc] init];
leftTableData = [[NSMutableArray alloc] init];
NSMutableArray *left = [[NSMutableArray alloc] init];
rightTableData = [[NSMutableArray alloc]init];
for (NSMutableArray *dictionary in jsonDictionary)
{
Model *model = [[Model alloc]init];
model.cid = [[dictionary valueForKey:#"cid"]intValue];
model.iid = [[dictionary valueForKey:#"iid"]intValue];
model.yr = [[dictionary valueForKey:#"yr"]intValue];
model.val = [dictionary valueForKey:#"val"];
[mainTableData addObject:model];
[head addObject:[NSString stringWithFormat:#"%ld", model.yr]];
[left addObject:[NSString stringWithFormat:#"%ld", model.iid]];
}
NSOrderedSet *orderedSet = [NSOrderedSet orderedSetWithArray:head];
headData = [[orderedSet array] mutableCopy];
// NSSet *set = [NSSet setWithArray:left];
// NSArray *array2 = [set allObjects];
// NSLog(#"%#", array2);
NSOrderedSet *orderedSet1 = [NSOrderedSet orderedSetWithArray:left];
NSMutableArray *arrLeft = [[orderedSet1 array] mutableCopy];
//remove duplicate enteries from header array
[leftTableData addObject:arrLeft];
NSMutableArray *right = [[NSMutableArray alloc]init];
for (int i = 0; i < arrLeft.count; i++)
{
NSMutableArray *array = [[NSMutableArray alloc] init];
for (int j = 0; j < headData.count; j++)
{
/* NSPredicate *predicate = [NSPredicate predicateWithFormat:#"SELF.iid == %ld", [[arrLeft objectAtIndex:i] intValue]];
NSArray *filteredArray = [mainTableData filteredArrayUsingPredicate:predicate];*/
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"SELF.iid == %ld AND SELF.yr == %ld", [[arrLeft objectAtIndex:i] intValue], [[headData objectAtIndex:j] intValue]];
NSArray *filteredArray = [mainTableData filteredArrayUsingPredicate:predicate];
if([filteredArray count]>0)
{
Model *model = [filteredArray objectAtIndex:0];
[array addObject:model.val];
}
}
[right addObject:array];
}
[rightTableData addObject:right];
}
How will I sort the arrays in ascending order?
Please help.
OK, so you have a model object that looks something like this...
#interface Model: NSObject
#property NSNumber *idNumber;
#property NSNumber *year;
#property NSString *value;
#end
Note, I am intentionally using NSNumber and not NSInteger for reasons that will become clear.
At the moment you are trying to do a lot all in one place. Don't do this.
Create a new object to store this data. You can then add methods to get the data you need. Seeing as you are displaying in a table view sectioned by year and then each section ordered by idNumber then I'd do something like this...
#interface ObjectStore: NSObject
- (void)addModelObject:(Model *)model;
// standard table information
- (NSInteger)numberOfYears;
- (NSInteger)numberOfIdsForSection:(NSinteger)section;
// convenience methods
- (NSNumber *)yearForSection:(NSInteger)section;
- (NSNumber *)idNumberForSection:(NSInteger)section row:(NSInteger)row;
- (NSArray *)modelsForSection:(NSInteger)section row:(NSInteger)row;
// now you need a way to add objects
- (void)addModelObject:(Model *)model;
#end
Now to implement it.
We are going to store everything in one dictionary. The keys will be years and the objects will be dictionaries. In these dictionaries the keys will be idNumbers and the objects will be arrays. These array will hold the models.
So like this...
{
2010 : {
1 : [a, b, c],
3 : [c, d, e]
},
2013 : {
1 : [g, h, u],
2 : [e, j, s]
}
}
We'll do this with all the convenience methods also.
#interface ObjectStore: NSObject
#property NSMutableDictionary *objectDictionary;
#end
#implementation ObjectStore
+ (instancetype)init
{
self = [super init];
if (self) {
self.objectDictionary = [NSMutableDictionary dictionary];
}
return self;
}
+ (NSInteger)numberOfYears
{
return self.objectDictionary.count;
}
+ (NSInteger)numberOfIdsForSection:(NSinteger)section
{
// we need to get the year for this section in order of the years.
// lets create a method to do that for us.
NSNumber *year = [self yearForSection:section];
NSDictionary *idsForYear = self.objectDictionary[year];
return idsForYear.count;
}
- (NSNumber *)yearForSection:(NSInteger)section
{
// get all the years and sort them in order
NSArray *years = [[self.obejctDictionary allKeys] sortedArrayUsingSelector:#selector(compare:)];
// return the correct year
return years[section];
}
- (NSNumber *)idNumberForSection:(NSInteger)section row:(NSInteger)row
{
// same as the year function but for id
NSNumber *year = [self yearForSection:section];
NSArray *idNumbers = [[self.objectDictionary allKeys]sortedArrayUsingSelector:#selector(compare:)];
return idNumbers[row];
}
- (NSArray *)modelsForSection:(NSInteger)section row:(NSInteger)row
{
NSNumber *year = [self yearForSection:section];
NSNumber *idNumber = [self idForSection:section row:row];
return self.objectDictionary[year][idNumber];
}
// now we need a way to add objects that will put them into the correct place.
- (void)addModelObject:(Model *)model
{
NSNumber *modelYear = model.year;
NSNumber *modelId = model.idNumber;
// get the correct storage location out of the object dictionary
NSMutableDictionary *idDictionary = [self.objectDictionary[modelYear] mutableCopy];
// there is a better way to do this but can't think atm
if (!idDictionary) {
idDictionary = [NSMutableDictionary dictionary];
}
NSMutableArray *modelArray = [idDictionary[modelId] mutableCopy];
if (!modelArray) {
modelArray = [NSMutableArray array];
}
// insert the model in the correct place.
[modelArray addObject:model];
idDictionary[modelId] = modelArray;
self.objectDictionary[modelYear] = idDictionary;
}
#end
With all this set up you can now replace your complex function with this...
-(void) requestFinished: (ASIHTTPRequest *) request
{
NSString *theJSON = [request responseString];
SBJsonParser *parser = [[SBJsonParser alloc] init];
NSDictionary *jsonDictionary = [parser objectWithString:theJSON error:nil];
for (NSDictionary *dictionary in jsonDictionary)
{
Model *model = [[Model alloc]init];
model.cid = [dictionary valueForKey:#"cid"];
model.idNumber = [dictionary valueForKey:#"iid"];
model.year = [dictionary valueForKey:#"yr"];
model.val = [dictionary valueForKey:#"val"];
[self.objectStore addModelObject:model];
}
}
To get the models out for a particular row then just use...
[self.objectStore modelsForSection:indexPath.section row:indexPath.row];
To get the number of sections in the tableview delegate method...
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return [self.objectStore numberOfYears];
}
No messing around with the model in the view controller.
Welcome to the MVC pattern.
There's a crap ton of code here but by placing all the code here you can remove all the complex code from your VC.
NSSet keeps only non-duplicate objects within themselves so to keep only unique objects in array you can use NSSet as -
Suppose you have array with duplicate objects
NSArray *arrayA = #[#"a", #"b", #"a", #"c", #"a"];
NSLog(#"arrayA is: %#", arrayA);
//create a set with the objects from above array as
//the set will not contain the duplicate objects from above array
NSSet *set = [NSSet setWithArray: arrayA];
// create another array from the objects of the set
NSArray *arrayB = [set allObjects];
NSLog(#"arrayB is: %#", set);
The output from the above looks like:
arrayA is: (
a,
b,
a,
c,
a
)
arrayB is: {(
b,
c,
a
)}
and to sort a mutable array in ascending order you can use NSSortDescriptor and sortUsingDescriptors:sortDescriptors. Also you need to provide the key on the basis of which array will be sorted.
NSSortDescriptor *sortDescriptor;
sortDescriptor = [[NSSortDescriptor alloc] initWithKey:#"key" ascending:YES];
NSArray *sortDescriptors = [NSArray arrayWithObject:sortDescriptor];
[array sortUsingDescriptors:sortDescriptors];
[sortDescriptor release];
Here you will get what you want.
//sort description will used to sort array.
NSSortDescriptor *descriptor=[[NSSortDescriptor alloc] initWithKey:#"iid" ascending:YES];
NSArray *descriptors=[NSArray arrayWithObject: descriptor];
NSArray *reverseOrder=[arrLeft sortedArrayUsingDescriptors:descriptors];
reverseOrder is your desire output.
there is another way you can sort objects that followed model.
NSArray *someArray = /* however you get an array */
NSArray *sortedArray = [someArray sortedArrayUsingComparator:^(id obj1, id obj2) {
NSNumber *rank1 = [obj1 valueForKeyPath:#"iid"];
NSNumber *rank2 = [obj2 valueForKeyPath:#"iid"];
return (NSComparisonResult)[rank1 compare:rank2];
}];
here sortedArray is our output.
you can replace same things for yr key as well.
This is what I did to sort the header data in ascending order and to remove duplicates from both header and leftmost column. Hope this will help others
NSOrderedSet *orderedSet3 = [NSOrderedSet orderedSetWithArray:head3];
headData3 = [[orderedSet3 array] mutableCopy];
[headData3 sortUsingComparator:^NSComparisonResult(NSString *str1, NSString *str2)
{
return [str1 compare:str2 options:(NSNumericSearch)];
}];
NSOrderedSet *orderedSet4 = [NSOrderedSet orderedSetWithArray:left3];
NSMutableArray *arrLeft3 = [[orderedSet4 array] mutableCopy];
[leftTableData3 addObject:arrLeft3];
I have a uicollectionView which display items from dictionaries (contained in a main dictionary in a plist). I need to sort it with the key "order" which is inside my dictionaries. I can't figure how to do this. I try to compare keys without success using descriptors.
I take the values from nsmutablearrays to display them in the cell.
Here my code (the one thart working unsorted):
//To retreive the data from the plist
NSMutableDictionary *items = [[NSMutableDictionary alloc] initWithContentsOfFile: finalPath];
//initialize arrays
_order = [[NSMutableArray alloc]initWithCapacity:10];
_name = [[NSMutableArray alloc]initWithCapacity:10];
_role = [[NSMutableArray alloc]initWithCapacity:10];
_image = [[NSMutableArray alloc]initWithCapacity:10];
_description = [[NSMutableArray alloc]initWithCapacity:10];
_email = [[NSMutableArray alloc]initWithCapacity:10];
_googleplus = [[NSMutableArray alloc]initWithCapacity:10];
//load every NSDictionnary on the view
NSMutableDictionary *loadedItem = [[NSMutableDictionary alloc]initWithCapacity:1];
NSMutableDictionary *theMember = [[NSMutableDictionary alloc]initWithCapacity:10];
loadedItem = [items objectForKey:#"Team"];
for (int i = 0; i < loadedItem.count; i++) {
theMember = loadedItem.allValues[i];
NSString *memberOrder = [theMember objectForKey:#"order"];
[_order addObject:memberOrder];
NSLog(#"member order = %#", _order);
NSString *memberName = [theMember objectForKey:#"name"];
[_name addObject:memberName];
NSLog(#"member name = %#", _name);
NSString *memberRole = [theMember objectForKey:#"role"];
[_role addObject:memberRole];
NSLog(#"member role = %#", _role);
NSString *memberImage = [theMember objectForKey:#"image"];
[_image addObject:memberImage];
NSLog(#"member image = %#", _image);
NSString *memberDesc = [theMember objectForKey:#"description"];
[_description addObject:memberDesc];
NSLog(#"member description = %#", _description);
NSString *memberMail = [theMember objectForKey:#"email"];
[_email addObject:memberMail];
NSLog(#"member mail = %#", _email);
NSString *memberGoogleplus = [theMember objectForKey:#"googleplus"];
[_googleplus addObject:memberGoogleplus];
NSLog(#"member googleplus = %#", _googleplus);
}
[self.collectionView reloadData];
}
I dealt with this by changing my mai ndict into an array which is better to manipulate.
Below is my code. When Looping over an NSArray of NSDictionary objects and trying to append to an array I keeping an NSLog which shows the correct result, but the result NSArray only contains the last record.
for (NSDictionary *entry in entries) {
NSString* projID = [entry objectForKey:#"NM_PROJECT"];
NSArray *projectNames = [[NSArray alloc] initWithObjects:projID,nil];
_projectpicker.delegate = self;
_projectpicker.dataSource = self;
NSLog(#"Error : %#", projID);
}
Log Result:
Test1
test2
test3
test4
When appending to NSArray (Projectnames) I was getting last data..
Every each loop iteration you initialise new array, you don't add new object to the array.
To do that you have to create NSMutableArray before loop and add object inside loop:
NSMutableArray *projectNames = [[NSMutableArray alloc] init];
for (NSDictionary *entry in entries) {
NSString* projID = [entry objectForKey:#"NM_PROJECT"];
[projectNames addObject: projID];
_projectpicker.delegate = self;
_projectpicker.dataSource = self;
NSLog(#"Error : %#", projID);
}
NSLog(#"Array : %#", projectNames);
Keep alloc statement outside of your for loop and use a NSMutableArray and then keep on adding to this array as and when required from inside the for loop.
NSMutableArray *projectNames = [[NSMutableArray alloc] init];
for(...)
{
[projectNames addObject: anyObject];
}
Setting:
_projectpicker.delegate = self;
_projectpicker.dataSource = self;
inside a loop doesn't make much sense. You don't need to do it multiple times.
While the other answers accurately describe what you're doing wrong with the array, your current requirement can be achieved more succinctly using KVC:
NSArray *projectNames = [entries valueForKey:#"NM_PROJECT"];
(then you don't need your own loop at all)
I am trying to create a dictionary (Not sure whether it should be NSDictionary or NSMutableDictionary) from NSString to an array (Not sure whether it should be NSArray or NSMutableArray).
property:
#property(nonatomic, readonly) NSMutableDictionary * categories;
implementation:
#synthesize categories = _categories;
- (NSMutableDictionary *)categories{
if(! _categories) {
for(PFObject * each in self.products) {
NSString * currentcategory = [each valueForKey:#"subtitle"];
NSArray * currentlist = [_categories objectForKey:currentcategory];
if(! currentlist) {
currentlist = [[NSArray alloc] init];
}
NSMutableArray * newArray = [currentlist mutableCopy];
[newArray addObject:each];
NSArray * newlist = [NSArray arrayWithArray:newArray];
[_categories setObject:newlist forKey:currentcategory];
}
}
NSLog(#"After constructor the value of the dictionary is %d", [_categories count]);
return _categories;
}
From the debug NSLog I realize that the dictionary is empty after the construction. What is wrong here and how shall I change it?
After code line
if(! _categories) {
add
_categories = [NSMutableDictionary new];
If you did not initialize _category array somewhere in code then.
you must instantiate it inside
if(!_categories)
Your NSMutableArray _categories instance is not allocated and initialized yet.
To create instance of NSMutableArray just add
_categories = [NSMutableArray arrayWithCapacity:0];
I have a custom class which has a integer as a variable.
// addons.h
-(NSMutableArray *) goodDirections:(int)iNumber;
// addons.m
-(NSMutableArray *) goodDirections:(int)iNumber;
{
NSString *gOne = #"one"+iNumber;
NSString *gTwo = #"two"+iNumber;
NSString *gThree = #"three"+iNumber;
NSString *gFour = #"four"+iNumber;
NSMutableArray *goodValues = [NSMutableArray arrayWithObjects:gOne,gTwo,gThree,gFour,nil];
return goodValues;
}
// ViewController.m
addons *directions =[[addons alloc]init];
NSMutableArray *helloTest = [[NSMutableArray alloc]init];
helloTest = [directions goodDirections:3];
NSString *obj1 = [helloTest objectAtIndex:1];
NSLog(#"%#",obj1);
and the custom class has a variable number, when entered returns an array with 4 string values, how do I retrieve the values from the array in my implementation file viewController.m
Make sure you import the custom class in the file you want.Then
NSMutableArray *arr = [theObject simpleMethod:4];
To retrieve any object in arr, you can use objectAtIndex function (for example):
NSString *item = [arr objectAtIndex:1];
please! try below code snip
NSMutableArray *arr = [theObject simpleMethod:4];
obj = [arr objectAtIndex:0];
You can use array object at index.
NSMutableArray *arrayTemp = [self simpleMthod:2];
objTemp = [arrayTemp objectAtIndex:0];
Or You can use
for (int i=0; i<[arrayTemp count]; i++)
{
objTemp = [arrayTemp objectAtIndex:i];
}