I have a UIPickerView with three components, and each component has NSIntegerMax for the numbers. So, I just need to get the data from each component, and send it to another ViewController called, CreationViewController. The three objects I need to send are strings, set up like so:
NSInteger supplyData = [supplypick selectedRowInComponent:0];
NSInteger mineralData = [supplypick selectedRowInComponent:1];
NSInteger vespeneData = [supplypick selectedRowInComponent:2];
So, I would like to add each cell in the format of this log:
NSLog(#"%i %# M:%i G:%i", supplyData, namer.text, mineralData, vespeneData);
All I need to know it what to put...
NSMutableArray * array = [[NSMutableArray alloc] init];
[array addObject: ];
^^HERE^^
This is all in one function. Please help! Thanks!
[array addObject:[NSString stringWithFormat:#"%i %# M:%i G:%i", supplyData, namer.text, mineralData, vespeneData]];
Related
I have this snipped of code that results in an array with a whole bunch of "<null>" throughout and I need to figure out how to remove them. Obviously after smashing my head against the keyboard I'm asking for some help.
In my .h I have declared:
NSArray *sortedContacts;
NSArray *rawContacts;
And then in .m:
-(void) buildContacts {
ABAddressBook *addressBook = [ABAddressBook sharedAddressBook];
NSArray *contacts = [addressBook people];
rawContacts=contacts;
NSArray *firstNames = [rawContacts valueForKey:#"First"];
NSArray *lastNames = [rawContacts valueForKey:#"Last"];
NSArray *organization = [rawContacts valueForKey:#"Organization"];
NSMutableArray *fullNames = [NSMutableArray array];
for(int i = 0; i < [firstNames count]; i++)
{
NSString *fullName = [NSString stringWithFormat:#"%# %# %#",
[firstNames objectAtIndex:i],
[lastNames objectAtIndex:i],
[organization objectAtIndex:i]];
[fullNames addObject:fullName];
}
NSMutableArray *fullList = [[NSMutableArray alloc]initWithArray:fullNames];
[fullList removeObjectIdenticalTo: #"<null>"];
sortedContacts = [fullList sortedArrayUsingSelector:#selector(compare:)];
NSLog(#"%#",sortedContacts);
}
I've tried so many things that I just can't see the forest for the trees anymore.
The text <null> is how the singleton instance of NSNull describes itself. That is, it's what -[NSNull description] returns.
In turn, these NSNull objects are getting into your firstNames, lastNames, and organization arrays because that's what Key-Value Coding does when you call -valueForKey: on an array and some of the elements return nil when that message is forwarded on to them with the same key. That is, calling [rawContacts valueForKey:#"First"] causes NSArray to call [element valueForKey:#"First"] for each element in rawContacts and to put the result in the array it builds. But, since an array can't contain nil, if one of those elements returns nil from [element valueForKey:#"First"], an NSNull object is added in its place.
Then, you are formatting the string fullName from the corresponding elements of firstNames, lastNames, and organization. You need to check if any of those elements are NSNull using if ([value isKindOfClass:[NSNull class]]) and handling that. For instance, you might just skip that record. Or you might combine the available fields and leave out any unavailable ones.
In any case, none of the elements of fullList will be #"<null>" because formatting values into #"%# %# %#" can never result in that string. (It might be #"<null> <null> <null>" or something like that, but never just #"<null>".)
A quick look at your code suggests you cannot get any empty strings added to your array, (a) you add elements using:
[fullNames addObject:fullName];
and fullName is created using:
[NSString stringWithFormat:#"%# %# %#" ...
so even if the %#'s get replaced by nothing you'll still have 2 spaces...
Maybe this is why all the things you've tried fail, if you're looking for empty strings you won't find them.
(Addendum: Question now says you're looking for #"<null>", you won't get that either for the same reason - there is at least two spaces in your string.)
The simple answer to removing invalid entries in fullNames is not to add them in the first place. You are adding elements in a loop (for), and conditional logic (e.g. if) inside the loop to determine whether you have something valid to add - however you define "something valid" - and only add an item to fullNames if so.
HTH
I'm not really familiar with the AddressBook framework, however this might be what's causing the confusion:
The values you collect in your arrays firstNames, lastNames and organization can be of type NSString or NSNull. You have to do any null-checking within the for-loop, before the fullName-string is constructed.
Remove this useless line:
[fullList removeObjectIdenticalTo: #"<null>"];
And replace the contents of your for-loop with the following code:
for(int i = 0; i < [firstNames count]; i++)
{
NSString *firstName = [firstNames objectAtIndex:i];
NSString *lastName = [lastNames objectAtIndex:i];
NSString *org = [organization objectAtIndex:i];
NSMutableArray *namesArray = [NSMutableArray array];
if ([firstName isKindOfClass:[NSString class]])
[namesArray addObject:firstName];
if ([lastName isKindOfClass:[NSString class]])
[namesArray addObject:lastName];
if ([org isKindOfClass:[NSString class]])
[namesArray addObject:org];
if (namesArray.count > 0)
[fullNames addObject:[namesArray componentsJoinedByString:#" "]];
}
Ok. i don't see ways to done it. But maybe some one knows?
I don't need use NSString to put it in array, because it makes huge memory usage.
NSMutableArray *array = #[#(-16.f)].mutableCopy;
for (NSNumber *number in array) {
NSLog(#"%f", number.floatValue);
}
first you need to convert yourfloat value toNSNumber using #(floatValue) .
NSMutableArray *arr = [[NSMutableArray alloc]init]; // here you can add value using initWithObject method.
[arr addObject:#(-16)]; // here you can add your float value using #(float value).
NSLog(#" array = %#",arr);
When you retrive value from array .
float yourValue = [[arr objectAtIndex:(your index)] floatValue];
hope it help you .
I want to update an mutable array. i have one array "ListArray" with some keys like "desc", "title" on other side (with click of button.) i have one array name newListArray which is coming from web service and has different data but has same keys like "desc" "title". so i want to add that data in "ListArray" . not want to replace data just add data on same keys. so that i can show that in tableview.
..........So my question is how to add data in "ListArray". or any other way to show that data in tableview but replacing old one just want to update the data
NSMutableArray *newListArray = (NSMutableArray*)[[WebServices sharedInstance] getVideoList:[PlacesDetails sharedInstance].userId tokenValue:[PlacesDetails sharedInstance].tokenID mediaIdMin:[PlacesDetails sharedInstance].minId mediaIdMax:[PlacesDetails sharedInstance].maxId viewPubPri:#"Public_click"];
NSDictionary *getNewListDic = [[NSDictionary alloc] initWithObjectsAndKeys:newListArray,#"videoList", nil];
[listVidArray addObject:getNewListDic];
NSArray *keys = [NSArray arrayWithObjects:#"desc",#"url",#"media_id",#"img",#"status",#"media_id_max",#"fb_url",#"title", nil] ;
NSMutableDictionary *dict = [NSMutableDictionary dictionary];
for(int i = 0 ; i < [listVidArray count] ; i++)
{
for( id theKey in keys)
{
// NSMutableArray *item = [NSMutableArray array];
NSLog(#"%#",theKey);
NSLog(#"%#",keys);
[dict setObject:[[[listVidArray objectAtIndex:i]valueForKey:#"videoList"] valueForKey:theKey] forKey:theKey];
// [dict setObject:[newListArray valueForKey:theKey] forKey:theKey];
}
}
If you the newListArray is totally different from the oldListArray, then clear the old one, and use the new data to fit it.
Otherwise, you need to merge the two arrays. One way is to check if a
data in newListArray is/is not in oldListArray and then decide
whether to add it into oldListArray.
When oldListArray is updated, call -reloadData of the tableView.
If I do not misunderstand your question, you may do something like this:
[listArray addObjectsFromArray:newListArray];
[_tableView reloadData];
Once an Array is initialized, in order to set value of desired position, I am using
[self.appName replaceObjectAtIndex:x withObject:[self.appCell objectAtIndex: 0]];
Problem is that if I initialize appName array without objects, this array keeps empty and I must initialize it using initWithObjects and then works. Problem is that I do not know the size of an array and if I set it like:
NSMutableArray *nameArray = [[ NSMutableArray alloc] initWithObjects:#"test",#"test",#"test",#"test", nil];
self.appName = nameArray;
[nameArray release];
For example, works from 0 to 3 but from position 4 to following ones, after replaceObjectAtIndex, position has a nil value. How to solve it? Thank you
It's a mutable array, you can add objects (to the end) and insert objects (in the middle) as well, whenever you like:
NSMutableArray *nameArray = [[NSMutableArray alloc] init];
[nameArray addObject:#"test"];
[nameArray insertObject:#"another test" atIndex:0];
[nameArray removeObjectAtIndex:1];
You can do this anywhere you have a pointer to the mutable array.
Look at the count methon on NSArray it gives you the number of elements in the array. So check that your index x is less than the count then you can remove the element.
This is a basic example that I know can be simplified, but for testing sake, I would like to do this in such a way. I want to set a variable based on an appending string (the variables "cam0" and "pos1" are already declared in the class). The appending string would essentially be an index, and i would iterate through a loop to assign cameras (cam0, cam1..) to different positions (pos0, pos1..).
cam0 is defined as an UIImageView
pos1 is defined as a CGRect
This works for a NSString Variable named coverIndex:
NSString* text = [[NSString alloc] initWithString:#""];
NSLog(#"%#",(NSString *)[self performSelector:NSSelectorFromString([text stringByAppendingString:#"coverIndex"])]);
The correct string that I set for coverIndex was logged to the Console.
Now back to my UIImageView and CGRect. I want this to work.
NSString* camText = [[NSString alloc] initWithString:#"cam"];
NSString* posText = [[NSString alloc] initWithString:#"pos"];
[(UIImageView *)[self performSelector:NSSelectorFromString([camText stringByAppendingString:#"0"])] setFrame:(CGRect)[self performSelector:NSSelectorFromString([posText stringByAppendingString:#"1"])]];
My error is "Conversion to non-scalar type requested"
This is the only way I found to do this sort of thing (and get the NSLog to work), but I still believe there is an easier way.
Thank you so much for any help :)
Use KVC, it's an amazing piece of technology that will do just what you want:
for (int index = 0; index < LIMIT; index++) {
NSString *posName = [NSString stringWithFormat:#"pos%d", index];
CGRect pos = [[self valueForKey:posName] CGRectValue];
NSString *camName = [NSString stringWithFormat:#"cam%d", index];
UIImageView *cam = [self valueForKey:camName];
cam.frame = pos;
}
One way you can do this would be to create your cameras in a dictionary and use those special NSStrings to key in to it. Like,
NSMutableDictionary *myCams;
myCams = [[myCams alloc] init];
[myCams addObject:YOUR_CAM0_OBJECT_HERE forKey:#"cam[0]"];
[myCams addObject:YOUR_CAM1_OBJECT_HERE forKey:#"cam[1]"];
NSString camString = #"cam[0]"; // you'd build your string here like you do now
id theCamYouWant = [myCams objectForKey:camString];