Loop for NSSlider

Question

I am instituting a NSSlider into my project that needs to call different methods when moved up or down. So if it is moved up it will do one method, which is a AppleScript, and the opposite if moved in the other direction, another AppleScript. Would I do this with an IF loop or something else? Thanks in advance!

sch · Accepted Answer · 2012-02-15T20:12:47.327

3

you should keep track of the old value of the slider, and then compare with the new one to see if it has moved down or up.

- (IBAction)slide:(id)sender {
    float newValue = [slider floatValue];
    if (newValue < oldValue) {
        // moved down
    } else {
        // moved up
    }
    oldValue = newValue;
}

edited Feb 15 '12 at 20:12

answered Feb 15 '12 at 20:04

sch

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That is great, any idea how to keep track of the value on the slider? – Stevezie Feb 15 '12 at 21:24
by using a the global variable **oldValue** mentioned in the code. You initialize it with the initial value of the slider (not shown in the code). And then every time the slider value changes, you update **oldValue** (this is what I did in the line **oldValue = newValue;** – sch Feb 15 '12 at 21:28

Loop for NSSlider

1 Answers1