Home/ Questions/Q 933331
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-15T20:49:05+00:00

I have a UILabel in an interactive calculator application that is continually being refreshed

  • 0

I have a UILabel in an interactive calculator application that is continually being refreshed with a newly formatted message as the user changes a UISlider value. My question is what is the most efficient way to manage the strings:

NSString *data = [[NSString *alloc] initWithFormat:@"Value A: %0.1f, Value B: %0.1f, valueA,valueB];
myUILabel.text = data;
[data release];

or

[myMutableString setString:@""];
[myMutableString appendFormat:@"Value A: %0.1f, Value B: %0.1f, valueA,valueB];
myUILabel.text = myMutableString;

Any advice would be appreciated

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    Creating a single, non-mutable string (your first example) is going to be more efficient than creating and then modifying a mutable string.

    However the real answer is that it doesn’t matter. The amount of time is negligible in user interaction terms, and any temporary objects created as a side effect will be freed on every pass through the event loop anyway, so worrying about this at all is premature optimization.

    • 0