i need some help here, i need to know how to create an array of string retrieved from an array. i'm using powerplot for graph and it only accept float or string array.
i need to create something something like this dynamically.
NSString * sourceData[7] = {#"2", #"1", #"4", #"8", #"14", #"15", #"10"};
Below are my code to find out the numbers in strings.
NSInteger drunked = [appDelegate.drinksOnDayArray count];
NSMutableArray * dayArray = [[NSMutableArray alloc] init];
NSMutableArray * sdArray = [[NSMutableArray alloc] init];
//float *sdArray[7];
for (int i=0; i<drunked; i++) {
DayOfDrinks *drinksOnDay = [appDelegate.drinksOnDayArray objectAtIndex:i];
NSString * dayString= [NSDate stringForDisplayFromDateForChart:drinksOnDay.dateConsumed];
[dayArray addObject:dayString];
NSLog(#"%#",[dayArray objectAtIndex:i]);
drinksOnDay.isDetailViewHydrated = NO;
[drinksOnDay hydrateDetailViewData];
NSString * sdString= [NSString stringWithFormat:#"%#", drinksOnDay.standardDrinks];
[sdArray addObject:sdString];
NSString *tempstring;
NSLog(#"%#",[sdArray objectAtIndex:i]);
}
thanks for the help :)
Array's in Objectice-C aren't that hard to work with:
NSMutableArray *myArray = [NSMutableArray array];
[myArray addObject:#"first string"]; // same with float values
[myArray addObject:#"second string"];
[myArray addObject:#"third string"];
int i;
int count;
for (i = 0, count = [myArray count]; i < count; i = i + 1)
{
NSString *element = [myArray objectAtIndex:i];
NSLog(#"The element at index %d in the array is: %#", i, element); // just replace the %# by %d
}
You can either use NSArray or NSMutableArray - depending on your needs, they offer different functionality.
Following tutorial covers exactly what you are looking after:
http://www.cocoalab.com/?q=node/19
You can also add the elements to the array when you init (and optionally add them later only if you are using the Mutable version of a collection class:
NSMutableArray *myArray = [[NSMutableArray alloc] initWithObjects:#"2", #"1", #"4", #"8", #"14", #"15", #"10", nil];
[myArray addObject:#"22"];
[myArray addObject:#"50"];
//do something
[myArray release];
You can use malloc to create a C-style array. something like this should work:
NSString **array = malloc(numElements * sizeof(NSString *))
some code here
free(array)
Be aware that unlike NSMutable array, c arrays won't do a retain, so you have to manage it if needed. And don't forget the free
Related
I am using this code
NSDictionary *yourDictionary;
NSArray * yourKeys;
yourKeys = [yourDictionary allValues];
to get the value of dictionary. But i want that array output in this form : array[0] ,array[1] while I am getting the output in console as below:-
2013-01-12 18:44:10.213 Birthday_Reminder[2871:c07] (
{
},
"Arpit Sihare")
and so on values.
so plz help me to get those values in this form and also I'm using KABPersonfirstnameproperty to retrieve those name from address book.
ABAddressBookRef addressBook = ABAddressBookCreate();
NSArray *thePeople = (NSArray *)ABAddressBookCopyArrayOfAllPeople(addressBook);
NSMutableArray* allPeoplesDicts = [NSMutableArray array];
for (id person in thePeople)
{
ABMultiValueRef phone =(NSString*)ABRecordCopyValue(person, kABPersonPhoneProperty);
NSString* name = (NSString *)ABRecordCopyCompositeName(person);
// NSMutableArray* phones = [[NSMutableArray alloc] init];
NSDictionary *phones=[[NSDictionary alloc]init ];
for (CFIndex i = 0; i < ABMultiValueGetCount(phones); i++)
{
NSString *phone = [(NSString *)ABMultiValueCopyValueAtIndex(phones,i) autorelease];
[phones addObject:phone];
}
NSDictionary* personDict = [[NSDictionary alloc] initWithObjectsAndKeys:name,#"Name",phones,#"PhoneNumbers",nil];
[phones release];
NSArray * yourKeys;
yourKeys = [personDict allValues];
NSLog(#"%#",yourKeys);
[allPeoplesDicts addObject:personDict];
[personDict release];
}
and I want firstname in array form that when i use nslog(#"%#",array[0]) it should print value stored in array first place and soon like array[1]....
It's too hard to understand what you are trying to say. I tried and found...
If you just want to store all the firstName (which is your key I think) then just make yourKeys an NSMutableArray and add the names to that Array. :
[yourKeys addObject:names];
Simple !!
I'm new in iPhone, I want to add elements to NSMutableArray with each element's name
I created a MutableArray for keys , then other array for elements that I get them from object called Pages.
I wrote the following code
NSMutableArray *myArray;
NSMutableArray *arrayKey = [[NSMutableArray alloc] initWithObjects:#"b_pag_id", #"b_pag_bo_id", #"b_pag_num", #"b_pag_note", #"b_page_mark", #"b_page_stop", #"b_pag_user_id", nil];
for (int x=0; x<[pages count]; x++) {
Pages *myPages = (Pages *)[self.pages objectAtIndex:x];
NSString *b_pag_id2 = [NSString stringWithFormat:#"%d",myPages.b_pag_id];
NSString *b_pag_bo_id2 = [NSString stringWithFormat:#"%d",myPages.b_pag_bo_id];
NSString *b_pag_num2 = [NSString stringWithFormat:#"%d",myPages.b_pag_num];
NSString *b_pag_note2 = myPages.b_pag_note;
NSString *b_page_mark2 = [NSString stringWithFormat:#"%d",myPages.b_page_mark];
NSString *b_page_stop2 = [NSString stringWithFormat:#"%d",myPages.b_page_stop];
NSString *b_pag_user_id2 = [NSString stringWithFormat:#"%d",myPages.b_pag_user_id];
NSMutableArray *arrayValue = [[NSMutableArray alloc] initWithObjects:b_pag_id2, b_pag_bo_id2, b_pag_num2, b_pag_note2, b_page_mark2, b_page_stop2, b_pag_user_id2, nil];
NSDictionary *theReqDictionary = [NSDictionary dictionaryWithObjects:arrayValue forKeys:arrayKey];
myArray = [NSMutableArray arrayWithObjects:theReqDictionary,nil];
}
NSLog(#"array size: %d", [myArray count]);
I want to add every element to its key for example
element (b_pag_id2) its key (b_pag_id) ..etc
is this right ?? or how to do this ??
consider that NSLog(#"array size: %d", [myArray count]); gives me 1 and the size of my elements is 14
Before the loop you need to initialize the aray
NSMutableArray *myArray = [NSMutableArray array];
Inside the loop replace following:
myArray = [NSMutableArray arrayWithObjects:theReqDictionary,nil];
with
[myArray addObject:theReqDictionary];
The problem is that you are creating a new array with 1 dictionary in every loop iteration. Instead you need to initialize the array and add values one by one.
Each time through your loop you are creating a new array for myArray that has only one element. You should initialize an empty NSMutableArray before the loop and then simply add your new object to it instead of using arrayWithObjects: to create myArray..
Here i'm giving a short example, and i hope this will help you.
see this code :-
NSMutableArray *arrayValue = [[NSMutableArray alloc]initWithObjects:#"Value1",#"Value2",#"Value3", nil];
NSMutableArray *arrayKey = [[NSMutableArray alloc]initWithObjects:#"1",#"2",#"3", nil];
NSMutableDictionary *dic = [[NSMutableDictionary alloc]init];
for(int i=0;i<3;i++)
{
[dic setObject:[arrayValue objectAtIndex:i] forKey:[arrayKey objectAtIndex:i]];
}
//and you can see this by printing it using nslog-
NSLog(#"%#",[dic valueForKey:#"1"]);
Thank you!!!
his guys,
i think this is a simple question but i do not know how to do it.
how do i create the line below dynamically from an array?
this is what i need to call.
//data source
NSString * sourceData[7] = {#"2", #"1", #"4", #"8", #"14", #"15", #"10"};
chartData = [WSData dataWithValues:[WSData arrayWithString:sourceData withLen:7]];
+ (NSArray *)arrayWithString:(NSString *[])strings
withLen:(NSUInteger)len {
NSMutableArray *tmpArr = [NSMutableArray
arrayWithCapacity:len];
NSUInteger i;
for (i=0; i<len; i++) {
[tmpArr addObject:strings[i]];
}
return [NSArray arrayWithArray:tmpArr];
}
thanks for all the help especially Daniel :)
this is the answer to the question
NSMutableArray * dayArray = [[NSMutableArray alloc] init];
dayArray = [NSMutableArray arrayWithCapacity:7];
NSMutableArray * sdArray = [[NSMutableArray alloc] init];
sdArray = [NSMutableArray arrayWithCapacity:7];
NSInteger drunked = [appDelegate.drinksOnDayArray count];
if (drunked !=0)
{
for(int i=6; i>=0; i--)
{
DayOfDrinks *drinksOnDay = [appDelegate.drinksOnDayArray objectAtIndex:i];
NSString * dayString= [NSDate stringForDisplayFromDateForChart:drinksOnDay.dateConsumed];
[dayArray addObject:dayString];//X label for graph the day of drink.
drinksOnDay.isDetailViewHydrated = NO;
[drinksOnDay hydrateDetailViewData];
NSNumber *sdNumber = drinksOnDay.standardDrinks;
[sdArray addObject: sdNumber];
}
NSString *sData[7];// = malloc(7 * sizeof(NSString *));
for (int i=0; i<7; i++)
{
DayOfDrinks *drinksOnDay = [appDelegate.drinksOnDayArray objectAtIndex:i];
sData[i] = [NSString stringWithFormat:#"%#",drinksOnDay.standardDrinks];
}
NSString * sourceData[7] = {sData[6],sData[5],sData[4],sData[3],sData[2],sData[1],sData[0] };
}
If you are only using the array as a call parm, and are not storing it somewhere or returning it from your current method:
NSString* sourceData[7];
for (i = 0; i < 7; i++) {
int num = <getTheValueYouWant>;
sourceData[i] = [NSString stringWithFormat:#"%d", num];
}
But note that if you intend to return the array, or store it in some long-lived variable, you need an entirely different setup.
So this is how you would create an NSMutableArray. Mutable because you're creating it at runtime.
NSString * sourceData = [[NSString alloc] initWithFormat:#""];
//assuming the array you have is arr with NSNumber objects
for (NSNumber *num in arr) {
[sourceData stringByAppendingFormat:#"%#", num];
}
You can try below code with the loop as you required.....
NSMutableArray *array;
array = [[NSMutableArray alloc] init];
[array addObject:[NSNumber numberWithFloat:1.0f]];
[array release];
I have a table view, which has its data source from an array that contains names of people.
Now to make it easy to find people, I want to section the table view so that it has the letter A-Z on the right hand side, just like the Address Book app.
But my current array just contains a collection of NSStrings. How do I split them so that they are grouped by the first letter of the names? Is there any convenient way to do it?
EDIT: If anyone's interested in my final code:
NSMutableArray *arrayChars = [[NSMutableArray alloc] init];
for (char i = 'A'; i <= 'Z' ; i++) {
NSMutableDictionary *characterDict = [[NSMutableDictionary alloc]init];
NSMutableArray *tempArray = [[NSMutableArray alloc] init];
for (int k = 0; k < [myList count]; k++) {
NSString *currentName = [[friends objectAtIndex:k] objectForKey:#"name"];
char heading = [currentName characterAtIndex:0];
heading = toupper(heading);
if (heading == i) {
[tempArray addObject:[friends objectAtIndex:k]];
}
}
[characterDict setObject:tempArray forKey:#"rowValues"];
[characterDict setObject:[NSString stringWithFormat:#"%c",i] forKey:#"headerTitle"];
[arrayChars addObject:characterDict];
[characterDict release];
[tempArray release];
}
At the end of the function I'll have:
arrayChars [0] = dictionary(headerTitle = 'A', rowValues = {"adam", "alice", etc})
arrayChars[1] = dictionary(headerTitle = 'B', rowValues = {"Bob", etc})
Thank you everyone for your help!
You can use a dictionary to sort them, so create an array with all the letters you want to sort and a array with nil objects to initialize the dictionary
NSArray *names = #[#"javier",#"juan", #"pedro", #"juan", #"diego"];
NSArray *letters = #[#"j", #"p", #"d"];
NSMutableArray *objects = [[NSMutableArray alloc] init];
for (NSInteger i = 0; i < [letters count]; ++i)
{
[objects addObject:[[NSMutableArray alloc] init]];
}
NSDictionary *dictionary = [[NSDictionary alloc] initWithObjects:objects forKeys:letters];
Then you must find the first letter if the word and put that word into the corresponding key in the dictionary
for (NSString *name in names) {
NSString *firstLetter = [name substringToIndex:1];
for (NSString *letter in letters) {
if ([firstLetter isEqualToString:letter]) {
NSMutableArray *currentObjects = [dictionary objectForKey:letter];
[currentObjects addObject:name];
}
}
}
To check you can print directly the dictionary
NSLog(#"%#", dictionary);
Then is your work to fill your sections in the tableview using the dictionary
quick question regarding Array's in xcode. I have ht efollowing code, which is supposed to go through an array of strings which it has got through php and JSON, and trun these strings into a custom object with the strings as the ivars for the object then add that object to a new array:
for (int i = 0; i<[list count]; i++) {
Article *article = [[Article alloc] init]; //creates custom object
article.uid = [[list objectAtIndex:i] objectAtIndex:0];
article.title = [[list objectAtIndex:i] objectAtIndex:1]; //adds string as ivars
article.description = [[list objectAtIndex:i] objectAtIndex:2];
articleArray = [[NSMutableArray alloc] init]; //inits the new array
[articleArray addObject:article]; //should add the object but seems to fail
[article release]; //releases the object
NSLog(#"%#", article.description);
}
NSLog(#"%d", [articleArray count]);
NSLog([articleArray description]);
}
The code does return the correct values using NSLog(#"%#", article.description); but not the correct length for the new array and it only adds one value to the array which is the string for article.description which makes no sense to me. The list array contains 2 elements each of which are arrays in themselves containing the strings.
You're recreating the articleArray in every loop. Declarate it outside, and it will work:
NSMutableArray *articleArray = [[NSMutableArray alloc] init]; //inits the new array
for (int i = 0; i<[list count]; i++) {
Article *article = [[Article alloc] init]; //creates custom object
article.uid = [[list objectAtIndex:i] objectAtIndex:0];
article.title = [[list objectAtIndex:i] objectAtIndex:1]; //adds string as ivars
article.description = [[list objectAtIndex:i] objectAtIndex:2];
[articleArray addObject:article]; //should add the object but seems to fail
[article release]; //releases the object
NSLog(#"%#", article.description);
}
NSLog(#"%d", [articleArray count]);
NSLog([articleArray description]);
}
You also may want to use the nicer for(NSArray *listElement in list) syntax instead.