iOS26适配指南之UIColor

介绍

随着 iOS 26 的发布，Apple 为开发者带来了对 HDR（高动态范围）颜色的原生支持。本文将带你快速了解 UIColor 在 iOS 26 中的新特性，并结合实际代码示例，介绍如何在项目中适配和使用这些功能。

UIColor新增HDR颜色支持

在 iOS 26 之前，UIColor 只能表示 SDR（标准动态范围）颜色。如今，系统新增了曝光值（Exposure / Linear Exposure）的支持，可以更好地展现 HDR 效果。

import UIKit

class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()

        // iOS26新增
        let hdrColor = UIColor(red: 1.0, green: 0.0, blue: 0.0, alpha: 1.0, exposure: 2.5)
        // let hdrColor = UIColor(red: 1.0, green: 0.0, blue: 0.0, alpha: 1.0, linearExposure: 2.5)
        view.backgroundColor = hdrColor
    }
}

UIColorWell新增HDR支持

UIColorWell 是系统提供的颜色选择控件。在 iOS 26 中，它同样支持 HDR 颜色。

代码

import UIKit

class ViewController: UIViewController {
    lazy var colorWell: UIColorWell = {
        let colorWell = UIColorWell()
        colorWell.title = "设置背景色"
        // iOS26新增
        colorWell.maximumLinearExposure = 2.0
        // iOS26新增，是否支持吸取颜色
        colorWell.supportsEyedropper = false
        colorWell.addTarget(self, action: #selector(valueChanged), for: .valueChanged)
        colorWell.sizeToFit()
        colorWell.center = view.center
        return colorWell
    }()

    override func viewDidLoad() {
        super.viewDidLoad()

        view.addSubview(colorWell)
    }

    @objc func valueChanged(_ sender: UIColor) {
        view.backgroundColor = colorWell.selectedColor
    }
}

效果

UIColorWell.gif

UIColorPickerViewController新增HDR支持

UIColorPickerViewController 在 iOS 26 中也升级了，支持 HDR 颜色选择，新增属性与 UIColorWell 一致。

代码

import UIKit

class ViewController: UIViewController {
    lazy var colorPickerViewController: UIColorPickerViewController = {
        var colorPickerViewController = UIColorPickerViewController()
        colorPickerViewController.title = "颜色选择器"
        colorPickerViewController.delegate = self
        // iOS26新增
        colorPickerViewController.maximumLinearExposure = 2.0
        // iOS26新增
        colorPickerViewController.supportsEyedropper = false
        return colorPickerViewController
    }()

    override func viewDidLoad() {
        super.viewDidLoad()
    }

    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        present(colorPickerViewController, animated: true, completion: nil)
    }
}

extension ViewController: UIColorPickerViewControllerDelegate {
    func colorPickerViewControllerDidSelectColor(_ viewController: UIColorPickerViewController) {
        let color = viewController.selectedColor
        view.backgroundColor = color
    }
    
    func colorPickerViewControllerDidFinish(_ viewController: UIColorPickerViewController) {
        dismiss(animated: true, completion: nil)
    }
}

效果

UIColorPickerViewController.gif