SwiftUI ColorPicker does not dismiss upon eyedropper button press

Question

Created Nov ’20

Replies 2

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Views 1.6k

Participants 2

The ColorPicker sheet should dismiss when the user presses the eyedropper so that they can pick a color from the screen behind it. I made my own coordinator, so is there anyone to specifically code for when the eyedropper is pressed? Currently my sheet only dismisses half a second after a color is selected.

Code Block import Foundation
import SwiftUI
struct ColorPicker: UIViewControllerRepresentable {
    @Environment(\.presentationMode) var presentationMode
    @Binding var colors: UIColor
    func makeCoordinator() -> Coordinator {
        Coordinator(color1: self)
    }
    
    func makeUIViewController(context: Context) -> UIColorPickerViewController {
        let colorPicker = UIColorPickerViewController()
        colorPicker.delegate = context.coordinator
        colorPicker.selectedColor = colors
        return colorPicker
    }
    func updateUIViewController(_ uiViewController: UIColorPickerViewController, context: UIViewControllerRepresentableContext<ColorPicker>) {
        uiViewController.selectedColor.resolvedColor(with: UITraitCollection.current)
    }
    class Coordinator: NSObject, UINavigationControllerDelegate, UIColorPickerViewControllerDelegate {
        var colorPick: ColorPicker
        init(color1: ColorPicker){
            colorPick = color1
        }
        
        func colorPickerViewControllerDidSelectColor(_ viewController: UIColorPickerViewController) {
            self.colorPick.colors =  viewController.selectedColor
            do{
                usleep(500000)
                viewController.dismiss(animated: true, completion: nil)
            }
        }
        func colorPickerViewControllerDidFinish(_ viewController: UIColorPickerViewController) {
        }
    }
}

Boost

Answer 1

hexyoungs OP

Dec ’20

I've encountered the same problem, and use UIColorWell as a work around.

Code Block struct ColorPickerWellView: UIViewRepresentable {
    private var selectedColor: Color
    let onColorPicked: (UIColor) -> Void
    init(selectedColor: Color, onColorPicked: @escaping (UIColor) -> Void) {
        self.selectedColor = selectedColor
        self.onColorPicked = onColorPicked
    }
    func makeUIView(context: Context) -> UIView {
        let colorWell = UIColorWell(frame: CGRect(x: 0, y: 0, width: 100, height: 50))
        colorWell.title = "Select Color"
        colorWell.selectedColor = UIColor(selectedColor)
        colorWell.addTarget(context.coordinator, action: #selector(context.coordinator.colorWellChanged), for: .valueChanged)
        return colorWell
    }
    func updateUIView(_: UIView, context _: Context) {}
    func makeCoordinator() -> Coordinator {
        Coordinator(
            onColorPicked: self.onColorPicked
        )
    }
    class Coordinator: NSObject {
        private let onColorPicked: (UIColor) -> Void
        init(onColorPicked: @escaping (UIColor) -> Void) {
            self.onColorPicked = onColorPicked
        }
        @objc func colorWellChanged(_ sender: UIColorWell) {
            if let c = sender.selectedColor {
                self.onColorPicked(c)
            }
        }
    }
}

0

Answer 2

hexyoungs OP

Dec ’20

Code Block swiftstruct ColorPickerWellView: UIViewRepresentable {
    let selectedColor: UInt32
    let onColorPicked: (UIColor) -> Void
    init(selectedColor: UInt32, onColorPicked: @escaping (UIColor) -> Void) {
        self.selectedColor = selectedColor
        self.onColorPicked = onColorPicked
    }
    func makeUIView(context: Context) -> UIColorWell {
        let colorWell = UIColorWell(frame: CGRect(x: 0, y: 0, width: 50, height: 50))
        colorWell.title = "Select Color"
        colorWell.selectedColor = UIColor(selectedColor.toColor())
        colorWell.supportsAlpha = true
        colorWell.addTarget(context.coordinator, action: #selector(context.coordinator.colorWellChanged), for: .valueChanged)
        return colorWell
    }
    func updateUIView(_ colorWell: UIColorWell, context _: Context) {
        colorWell.selectedColor = UIColor(selectedColor.toColor())
    }
    func makeCoordinator() -> Coordinator {
        Coordinator(
            onColorPicked: self.onColorPicked
        )
    }
    class Coordinator: NSObject {
        private let onColorPicked: (UIColor) -> Void
        init(onColorPicked: @escaping (UIColor) -> Void) {
            self.onColorPicked = onColorPicked
        }
        @objc func colorWellChanged(_ sender: UIColorWell) {
            if let c = sender.selectedColor {
                print(c)
                self.onColorPicked(c)
            }
        }
    }
}

updated

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