retrieving all objects from an array

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retrieving all objects from an array

(7 posts) (4 voices)

Started 6 months ago by gametreesnet
Latest reply from gametreesnet

Tags:

array
object

gametreesnet
Member

Hello. I have a question on getting all objects from an array like NSMutableArray, NSArray, and CCArray.
I'm trying to select all objects, but codes that I'm getting are these:

1:
[ExampleArray objectAtIndex:1]; <- It is only one, I need all objects.

2:
[ExampleArray objectsAtIndexes:]; <-This one, it says I need to use a integer set, but I'm not sure about it.

I know there are many more like getObjects, arrayWithArray (I read in the Apple Document), but in the "Finding Objects in an Array" section, I couldn't find a useful one for finding all my objects in the array.
I want to use them to make an array of actions.

If there is a tutorial or some answers, please reply to me.
Thanks.

Just for reference, I'm using NSMutableArray, so I mostly need the answer for NSMutableArray, but I will be more than happy if you tell me on other arrays too.

Posted 6 months ago #
fet_loa
Member

Are you asking for a reference to several objects? That is exactly what an array is. If you want to perform something on all the objects in the array, use a for loop.

objectsAtIndexes: returns a new array containing the objects at the indices you specify.

Maybe I don't understand your question?

Posted 6 months ago #
gametreesnet
Member
Kinds of.
But if I'm using the for loop and I want to do something about it in other methods, how can I work on it?
For example:

Init method
```
for (i =1; i<7;i++ ) {
        enemy = [[Enemy alloc] initWithFile:@"Icon-Small.png"];
        [enemy setPosition:ccp(size.width /r, size.height /2)];
        [self addChild:enemy];
        enemy.tag = 1;
        [spriteArray addObject:enemy];

    }
```
and animation method
```
[[spriteArray objectAtIndex:0] runAction:  <-
     [CCSequence actions:moveAction, b, nil]];
```
<- Animation method is the problem. If I want to select all objects in the array like in the for loops, I don't know how. If I just put my array on it, it doesn't work.
Posted 6 months ago #
slembcke
Administrator

You need another for loop to attach an action to each object in the array, you can't use actions on an entire array.

Posted 6 months ago #

gametreesnet
Member

Yes the code is only a part of the method.
This is my actual one:

animation method:

CGSize size = [[CCDirector sharedDirector] winSize];
    NSMutableArray *hello = [[NSMutableArray alloc] init];
    for (int b = 1; b<[spriteArray count]; b++) {
        moveAction = [CCMoveBy actionWithDuration:2 position:ccp(size.width/2,0)];
        [hello addObject:moveAction];

    }
    id b = [CCCallFunc actionWithTarget:self selector:@selector(follow)];
     [[spriteArray objectAtIndex:0] runAction:
     [CCSequence actions:moveAction, b, nil]];

and so on.
I want to make my sprites move in a sequence like the first object in the array goes first, then the other, then the other one.
However, I want to get all the objects so they can work as an array.
ObjectAtIndex do not work because it can contain only one object.

Posted 6 months ago #

Stephen Morris
Member

@gametreesnet If you want to select all the objects in an array then you would create a for loop that iterates through each object in the array hence why there is objectAtIndex.

For example:

for (int b = 1; b<[spriteArray count]; b++) {
        id moveAction = [CCMoveBy actionWithDuration:2 position:ccp(size.width/2,0)];
        id followAction = [CCCallFunc actionWithTarget:self selector:@selector(follow)];
        [[spriteArray objectAtIndex:0] runAction: [CCSequence actions:moveAction, followAction, nil]];
    }

Posted 6 months ago #

gametreesnet
Member

So does that mean I don't have to make a separate array for my action? Just for loop?

Posted 6 months ago #

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