Vary number of objects in array - objective-c

Question

In my app the user can create unlimited UITextFields. then I get the information of all of them and upload in a json file:
NSString *object;
NSString *object2;
NSString *object3;
NSString *object4;
NSString *object5;
NSString *size;
for (UITextField *text in array2) {
int touchedtag = text.tag;
NSUInteger tagCount = touchedtag;
switch (tagCount) {
case 1:
object = [NSString stringWithFormat:#"%# %# %#", text.text, NSStringFromCGRect(text.frame), text.font];
break;
case 2:
object2 = [NSString stringWithFormat:#"%# %# %#", text.text, NSStringFromCGRect(text.frame), text.font];
break;
case 3:
object3 = [NSString stringWithFormat:#"%# %# %#", text.text, NSStringFromCGRect(text.frame), text.font];
break;
case 4:
object4 = [NSString stringWithFormat:#"%# %# %#", text.text, NSStringFromCGRect(text.frame), text.font];
break;
case 5:
object5 = [NSString stringWithFormat:#"%# %# %#", text.text, NSStringFromCGRect(text.frame), text.font];
break;
default :
break;
}
}
NSArray *keys = [NSArray arrayWithObjects:#"text", #"text2", #"text3", #"text4", #"text5", nil];
NSArray *objects = [NSArray arrayWithObjects:object,object2,object3, object4, object5, nil];
NSDictionary *jsonDictionary = [NSDictionary dictionaryWithObjects:objects forKeys:keys];
NSString* jsonString = [jsonDictionary JSONRepresentation];
NSData *jsonData = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
[jsonData writeToFile:path atomically:YES];
NSString *destDir = #"/sandbox/";
[[self restClient] uploadFile:filename toPath:destDir
withParentRev:nil fromPath:path];
[[self restClient] loadMetadata:#"/sandbox/"];
}
The problem is that the number of objects is not independent (object, object2...). so if the user creates less than 5 text fields the app crashes, while if more than 5 nothing happens, but the info for tag 6 and on is not recorded. How can I vary the number of objects according to the number of fields created?

Answer 1

Learn how to use NSMutableArray: https://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Classes/NSMutableArray_Class/Reference/Reference.html
It allows you to add and remove objects "on the fly", just like using a Vector in many other languages. (Java, ActionScript, C++...)
Example:
(someValue is a previously declared variable)
stuff = [[NSMutableArray alloc] initWithCapacity: someValue];
[stuff insertObject:object1 atIndex:0];
[stuff insertObject:object2 atIndex:1];
[stuff insertObject:object2 atIndex:2];
...
This code is to initialize it with a specific number of objects, which seeems to be what you are looking for. NSMutableArray also allows you to adjust the number of objects in the array at a later time.