swift - UITabBarController 图像太小

Question

这个问题已经有答案了:

TabBarItems and setting their image sizes? (4 个回答)

已关闭 4 年前。

我有 3 个版本的图像，75 x 75、50 x 50 和 25 x 25。

当我将其设置为标签栏图像时，我得到以下效果:

我期望图像更大，但似乎无法编辑它。

我已经以编程方式构建了我的 UITabBarController 。

class MainTabBarController: UITabBarController {

    override func viewDidLoad() {
        super.viewDidLoad()
        navigationController?.isNavigationBarHidden = true

        tabBar.isTranslucent = false
        tabBar.barTintColor = UIColor.hexStringToUIColor(hex: "EFF4EF")

        viewControllers = [
            generateNavigationController(with: ChatBotController(), image: #imageLiteral(resourceName: "tabBar_bot_head").withRenderingMode(.alwaysOriginal)),
        ]
    }

    fileprivate func generateNavigationController(with rootViewController: UIViewController, image: UIImage) -> UIViewController {
        let navController = UINavigationController(rootViewController: rootViewController)
        navController.tabBarItem.image = image
        return navController
    }
}

Answer 1

尝试在 UIImage 扩展中添加此功能

extension UIImage {

    func resize(targetSize: CGSize) -> UIImage {
        return UIGraphicsImageRenderer(size:targetSize).image { _ in
            self.draw(in: CGRect(origin: .zero, size: targetSize))
        }
    }

}

并在viewDidLoad中更改代码行

viewControllers = [
        generateNavigationController(with: ChatBotController(), image: #imageLiteral(resourceName: "tabBar_bot_head").withRenderingMode(.alwaysOriginal)),
    ]

有了这个

viewControllers = [
        generateNavigationController(with: ChatBotController(), image: #imageLiteral(resourceName: "tabBar_bot_head").withRenderingMode(.alwaysOriginal)).resize(targetSize: CGSize(width: 50, height: 50)),
    ]