iOS: Dereferencing NSMutableArray - ios

Question

When someone votes down the question... kindly please also comment why you had voted it down.
I have a UIView (myHolderView) on which I want to place 9 or more other views.
I added some UIView (MyView) instances to an NSMutableArray of 9 elements (MyArray).
MyView has a label (UILabel) on it. Can someone please assist how to get label's text using MyArray?
Note:
I am seeing the UIViews added to main holder view and getting labels on it.
initWithFrame:(v,v,v,v) number: (value) is the init method I had overloaded init with.
//These two are declared as global variable
NSMutableArray *tiles;
MyView *tile;
#implementation ViewController
#synthesize myHolderView;
- (void)viewDidLoad
{
[super viewDidLoad];
tiles=[[NSMutableArray alloc]initWithCapacity:9];
for (int xIndex=0; xIndex<3; xIndex++)
{
for(int yIndex=0; yIndex<3; yIndex++)
{
static int label=0;
[tiles addObject:[[MyView alloc]initWithFrame:CGRectMake(value,value,value,value)
number:[[NSString alloc] initWithFormat:#"%d",label+1]]];
[self.myHolderView addSubview:tiles[label]];
//Now - when I want to print the labels onto Console as NSLog messages
//it is printing null
MyView *n=[[MyView alloc]init];
n=(MyView *)[tiles objectAtIndex:label++];
NSLog(#"%#---", n.myLabel.text);
//this also does not work. Definitely wrong dereferencing
// NSLog(#"%#---", (MyView*) [tiles ObjectAtIndex:1].mylabel.text);
//label++;
}
}
}
Please help
how to dereference NSMuableArray objects to the type what we want (the
type we know it exactly)
MyView:
- (id)initWithFrame:(CGRect)frame number:(NSString *)num;
{
self = [super initWithFrame:frame];
if (self) {
MyView *tile = [[[NSBundle mainBundle] loadNibNamed:#"XView" owner:self options:nil] objectAtIndex:0];
tile.myLabel.text=num;
[self addSubview:tile];
}
return self;
}

Answer 1

According to your comment, you want to add some view to your holderview. Later, you want to change text in particular view. So I suggest some way. I think, It will help you..
1) create and Add subview to your holder view
for (int xIndex=0; xIndex<9; xIndex++)
{
MyView *subView = [[MyView alloc]initWithFrame:CGRectMake(value,value,value,value)
number:[[NSString alloc] initWithFormat:#"%d",somecount+1]]]; // doesn't know why do you try this..
subView.tag = xIndex;
[self.myHolderView addSubview: subView];
}
2) Get particular subview with tag value.(No need to maintain any other array in your view controller)
After some time, you want to change text in particular view. Just try it..
MyView *subView = [self.myHolderView viewWithTag:index]; // as like, you access array
subView.myLabel.text = yourUpdateText;

Answer 2

#import "ViewController.h"
#interface MyView : UIView
#property UILabel *myLabel;
- (id) initWithFrame: (CGRect) rect number: (NSString *) string;
#end
#implementation MyView
- (id) initWithFrame: (CGRect) frame number: (NSString *) number {
self = [super initWithFrame:frame];
if (!self) return nil;
// Any things here
// Are you initialized label?
_myLabel = [UILabel new];
[_myLabel setText:number];
[self addSubview:_myLabel];
return self;
}
#end
#interface ViewController ()
#property UIView *myHolderView;
#end
NSMutableArray *tiles;
MyView *tile;
#implementation ViewController
#synthesize myHolderView;
- (void)viewDidLoad {
[super viewDidLoad];
tiles=[[NSMutableArray alloc]initWithCapacity:9];
int value = 1, label = 0;
myHolderView = [UIView new];
for (int xIndex=0; xIndex<3; xIndex++) {
for(int yIndex=0; yIndex<3; yIndex++) {
NSString *number = [[NSString alloc] initWithFormat:#"%d",label+1];
MyView *myView = [[MyView alloc]initWithFrame:CGRectMake(value,value,value,value)
number:number];
[tiles addObject:myView];
[self.myHolderView addSubview:tiles[label]];
//Now - when I want to print the labels onto Console as NSLog messages
//it is printing number
MyView *n=(MyView *)[tiles objectAtIndex:label++];
NSLog(#"%#---", n.myLabel.text);
}
}
// And without tiles array
for (UIView *subView in [myHolderView subviews])
for (UIView *subSubView in [subView subviews])
if ([subSubView isKindOfClass:[UILabel class]])
NSLog(#"%#", [(UILabel *) subSubView text]);
}
#end

Answer 3

Your problem is nothing to do with arrays or dereferencing. It's a logical issue because you are creating multiple views and nesting them.
Change the implementation of MyView:
- (id)initWithFrame:(CGRect)frame number:(NSString *)num;
{
self = [[[NSBundle mainBundle] loadNibNamed:#"XView" owner:self options:nil] objectAtIndex:0];
self.frame = frame;
self.myLabel.text = num;
return self;
}
Try something like this (typed inline so watch for issues):
- (void)viewDidLoad
{
[super viewDidLoad];
tiles = [[NSMutableArray alloc] initWithCapacity:9];
NSUInteger counter = 0;
for (int xIndex=0; xIndex<3; xIndex++)
{
for(int yIndex=0; yIndex<3; yIndex++)
{
MyView *newView = [[MyView alloc] initWithFrame:CGRectMake(value,value,value,value) number:[[NSString alloc] initWithFormat:#"%d", counter+1]]];
[self.myHolderView addSubview:newView];
[tiles addObject:newView];
MyView *logView = (MyView *)[tiles objectAtIndex:counter];
NSLog(#"view %d is %#---", counter, logView.myLabel.text);
counter++;
}
}
}