如何在Apple CarPlay的CPAlertTemplate中添加图片（附代码）

我需要在Apple CarPlay默认的CPAlertTemplate中添加图片，同时保留警报标题和描述的显示。以下是我当前的实现代码：

func updateCarPlayTemplate(title: String) {
        guard let interfaceController = carPlayInterfaceController else { return }
        
        // Dismiss any existing template
        interfaceController.dismissTemplate(animated: false) {, in
            // Define the title and description
            let title = title
            // Define the title variants to include the description
            let titleVariants = [title]
            // Define the actions
            let okAction = CPAlertAction(title: "OK", style: .default) { action in
                // Handle OK action
                interfaceController.dismissTemplate(animated: true, completion: nil)
            }
            // Create and present the alert template
            let alertTemplate = CPAlertTemplate(titleVariants: titleVariants, actions: [okAction])
            interfaceController.presentTemplate(alertTemplate, animated: true)
            
            // Dismiss the template automatically after 3 seconds
            DispatchQueue.main.asyncAfter(deadline: .now() + 3) {
                interfaceController.dismissTemplate(animated: true, completion: nil)
            }
        }
    }

要实现这个需求，你可以利用CPAlertTemplate的image属性添加图片，同时通过subtitleVariants设置描述文本，还需要修正原代码里的语法错误。修改后的完整代码如下：

func updateCarPlayTemplate(title: String, description: String? = nil, alertImage: UIImage? = nil) {
    guard let interfaceController = carPlayInterfaceController else { return }
    
    // 关闭已存在的模板
    interfaceController.dismissTemplate(animated: false) { [weak interfaceController] in
        guard let interfaceController = interfaceController else { return }
        
        // 标题变体数组
        let titleVariants = [title]
        // 描述（副标题）变体数组，有值才传入
        let subtitleVariants = description != nil ? [description!] : []
        
        // OK按钮操作
        let okAction = CPAlertAction(title: "OK", style: .default) { _ in
            interfaceController.dismissTemplate(animated: true, completion: nil)
        }
        
        // 初始化带标题、描述和按钮的警报模板
        let alertTemplate = CPAlertTemplate(titleVariants: titleVariants,
                                            subtitleVariants: subtitleVariants,
                                            actions: [okAction])
        // 设置警报显示的图片
        alertTemplate.image = alertImage
        
        // 展示模板
        interfaceController.presentTemplate(alertTemplate, animated: true)
        
        // 3秒后自动关闭模板
        DispatchQueue.main.asyncAfter(deadline: .now() + 3) {
            interfaceController.dismissTemplate(animated: true, completion: nil)
        }
    }
}

关键修改说明 #

• 新增description和alertImage参数，灵活传入描述文本和图片资源
• 修复原代码中dismissTemplate闭包的语法错误（移除多余的, in）
• 使用subtitleVariants字段设置警报的描述文本，和titleVariants对应实现标题+描述的显示
• 通过alertTemplate.image属性绑定要显示的图片，支持传入任意UIImage对象
• 添加[weak interfaceController]避免循环引用问题

内容的提问来源于stack exchange，提问作者Parveen