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SOLVED: Slider finished changing

Forums > SwiftUI

How would I call a function only when a Slider finishes sliding?

I want to use a slider to select a value from a range, and then once that value is selected, call a function to do some other action. Using the code below, the value changes with every smidge of movement. If I do something like my own Binding for get/set, that would make a ton of actions being taken, all of which would not be needed until the final number is arrived at.

NOTE: It looks like in UIKit, the UISlider, setting a property like this would do it:

    slider.isContinuous = false 

...but not finding anything simiar in SwiftUI Slider.

Here's the code:

 struct ContentView: View {
    @State private var value: Double = 0.0

    var body: some View {
        Slider(value: $value, in: -0.5...0.5)
        Text("Value will be:: \(value, specifier: "%.1f")")
    }

    // The function I'd like to call when the above slider is finished being changed.
    func sliderCompleted() {
        // call and do some other action...
    }
}

2      

You can supply an onEditingChanged closure to Slider and it will get called with a value of true when the user starts moving the slider thumb and false when they stop.

    Slider(value: $value, in: -0.5...0.5) { editing in
        print(editing)
    }

5      

Thanks roosterboy. Should have known it was something straight forward...works perfectly!

1      

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