Accessing variables with related names in a for loop

Question

I have three NSRects in separate variables named rect1, rect2, and rect3, and I want to increment each one's origin.x by 10.

I thought a for-loop would be good for this, but I don't know how I can do it.

This is an example of how I want it to work:

for(int i=0, i<3, i++) {
   rect[i].origin.x +=10
}

but this exact code gives an error

property "rect" not found on object of type "graphics"

Is there a way to code it like in my example?

Be more specific. Define "won't accept". If you are getting a warning or error, post the exact message. Also tell us how `rect` is declared. — rmaddy, Oct 19 '14 at 17:53
Ok sorry, they are all decleared as NSRect so for example: NSRect rect1; NSRect rect2; The error that it produces is: "property "rect" not found on object of type "graphics" — user3195648, Oct 19 '14 at 17:55
@user3195648 You can't access individual variables using array syntax. — rmaddy, Oct 19 '14 at 17:57
rect[i] means the i th number of rect in the array,but apparently you are trying to use it to access rect'i' (the name) variable instead — Amir, Oct 19 '14 at 17:57
yes that's why I ask if there is a way to do it for the variable? — user3195648, Oct 19 '14 at 18:01
See also [ObjC equivalent of PHP's "Variable Variables"](http://stackoverflow.com/questions/2283374/objective-c-equivalent-of-phps-variable-variables), [Create multiple variables based on an int count](http://stackoverflow.com/q/2231783), and [Is it possible to reference a variable with a string and an int?](http://stackoverflow.com/q/6049175) — jscs, Oct 19 '14 at 18:11

score 1 · Accepted Answer · answered Oct 19 '14 at 18:01

1

Is there a way to increment a variable with for loop

Not in objective-c for sure. You cannot declare variables in 0-n format and loop through it.

If you create an array out of your NSRect variables then you can loop through the array and modify properties.

Note: NSArray can only hold Objects not primitives, you might find this handy

answered Oct 19 '14 at 18:01

GoodSp33d

so I can put the data in a NSArray and convert the rects to NSValue via valueWithRect:? Am I right? – user3195648 Oct 19 '14 at 18:12

1 Answers1