How to place "x" number of objects on the view - objective-c

Question

If the user provides a number, such as 8, how exactly would I place eight labels onto the view?
For example:
int userGivenNumber = textfield.text;
for (int labelNumber=1; i<=userGivenNumber; i++) {
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(50, *previousLabel*.frame.origin.y + 20)];
}
How would you get the location of previousLabel? Additionally, if the user wanted to edit a label, such as label 3, how would I edit this label?
The problem is that I don't know how many labels they want to place while coding, and I have no way of keeping track of the labels, since they are called label. Do you have any ideas? Do you understand what I am asking? Thanks for your help.

Answer 1

- (void)addLabels {
CGFloat offset = 0;
// labels is NSMutableArray property
labels = [[NSMutableArray alloc] initWithCapacity:8];
for (int i = 0; i < 8; i++) {
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, offset, 320, 20)];
[self.view addSubview:label];
[labels addObject:label];
offset += label.frame.size.height;
}
}
Edit: Like jerrylroberts said, to access the label array from elsewhere in your code, you should declare it as a property.

Answer 2

So you could add the views like so:
int userGivenNumber = [textfield.text intValue];
for (int labelNumber=1; i<=userGivenNumber; i++) {
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(50, *previousLabel*.frame.origin.y + 20)];
[self.view addSubview:label];
[label release];
}
If you wanted to keep track of them you could just create a mutable array as a property and then add each label to the array before you add to the subview;
Interface
#property (nonatomic, retain) NSMutableArray *addedLabels;
Implementation
#synthesize addedLabels=_addedLabels;
- (void)viewDidLoad
[super viewDidLoad];
// Create your array to hold labels
NSMutableArray *addedLabels = [[NSMutableArray alloc] initWithCapacity:0];
self.addedLabels = addedLabels;
[addedLabels release];
// NOW put your code
int userGivenNumber = [textfield.text intValue];
for (int labelNumber=1; i<=userGivenNumber; i++) {
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(50, *previousLabel*.frame.origin.y + 20)];
[self.view addSubview:label];
[addedLabels addObject:label];
[label release];
}
}
Now you can easily access any label you have added if you have the index. Hope this helps

Answer 3

Just keep a reference to the location (CGPoint) outside the loop, but update it inside the loop to the current label's location. When you assign the next frame do your operation depending on width and size of the label, and don't forget to update the reference of CGPoint.