app crash after allocation of 10 mb memory - objective-c

Question

We are facing crash in my app. I check on instrument that after allocation of 10 mb app get crash at any point(not any fix instance).
I am allocating approax 1000 label every time i click on any button in a for loop and release it after work done please help. In instrument there is no memory leaks but still app crash after allocationg 10 mb of memory.
this is a code i am applying on click of a button
is this a right way??????
-(IBACTION) btnShow
{
for (UIView *obj in scrollview.subviews)
{
[obj removeFromSuperview];
}
int x;
int y=0;
for (int j=0; j<12; j++) {
x=0;
// Do any additional setup after loading the view, typically from a nib.
for (int i=0; i<1000; i++) {
UILabel * lblUsage=[[UILabel alloc] initWithFrame:CGRectMake(x, y, 75, 45)];
lblUsage.text=[NSString stringWithFormat:#"%d",i];
lblUsage.textColor=[UIColor lightGrayColor];
lblUsage.numberOfLines=2;
lblUsage.font = [UIFont systemFontOfSize:14.0];
lblUsage.textAlignment=UITextAlignmentCenter;
lblUsage.backgroundColor=[UIColor colorWithPatternImage:
[UIImage imageNamed:#"labelBox.png"]];
lblUsage.layer.borderColor = [UIColor blackColor].CGColor;
lblUsage.layer.borderWidth = 0.5;
[scrollview addSubview:lblUsage];
[lblUsage release];
x+=75;
}
y+=40;
}
scrollview.contentSize=CGSizeMake(x, 1000);
}

Answer 1

you receive memory warning in the above code
memory warning level 1 is first warning where you should remove unnecessary view to clean up memory
memory warning level 2 is the limit.. remove something now or your app will quit within few seconds.
memory warning level 3 is sent when the system has decided to quit your app! due to memory usage

Answer 2

Sorry, but you'll just have to take a completely different aproach - which will
make your code much more complex. There's no way you could get around by creating
12.000 labels with pattern background.
initially you would create only those labels that are shown on screen and one or
two rows (and columns) of those that could soon appear on screen while the user is scrolling
then you'll do most of your work in viewDidScroll by creating and disposing of lables on the fly.
here your code should decide which labels can be disposed of (when they are far enough from visible screen)
and which have to be created because they could appear soon on screen (depends on current location of content.
offset)
Take a look at ScrollViewSuite as example for tiling. It's not exactly what you're looking
for but it should give you a kickstart.