iOS15.5中CarPlay应用展示CPActionSheetTemplate调用presentTemplate崩溃

从崩溃日志的信息可以明确：在iOS 15.5系统中，CPInterfaceController的presentTemplate(_:animated:completion:)方法不支持传入CPActionSheetTemplate，允许的模板类型仅包括CPGridTemplate、CPListTemplate、CPNowPlayingTemplate、CPTabBarTemplate、CPAlertTemplate、CPVoiceControlTemplate。而CPActionSheetTemplate是在iOS 16及以上版本才被纳入presentTemplate的支持范围，这就是该功能在iOS17正常、iOS15.5崩溃的核心原因。

针对不同iOS版本做适配处理，以下是两种可行方案：

方案1：版本判断适配展示方法 #

在iOS 15及以下系统中，使用CarPlay专门的showActionSheetTemplate(_:animated:completion:)方法展示CPActionSheetTemplate；iOS 16及以上版本则保留presentTemplate方法。修改后的代码如下：

func showRequestSheet(_ id: String) {
    appPrint("Category Clicked: ", id)

    let actDismiss = CPAlertAction(title: "Dismiss", style: .destructive, handler: { action in
        self.interfaceController?.dismissTemplate(animated: true, completion: nil)
    })
    
    let actOk = CPAlertAction(title: "ok".translated, style: .default, handler: { action in
        if let category = CPHelper.shared.arrCategories.first(where: { $0.id == id }) {
            self.interfaceController?.dismissTemplate(animated: true, completion: nil)
            CPHelper.shared.requestAudioAPI(category.name) { (isSuccess, error) in
                if let err = error {
                    let actDone = CPAlertAction(title: "e-mail_registration_password-strength-ok".translated, style: .default, handler: { action in
                        self.interfaceController?.dismissTemplate(animated: true, completion: nil)
                    })
                    let alert = CPAlertTemplate(titleVariants: [err.translated], actions: [actDone])
                    // 对AlertTemplate也做版本适配
                    if #available(iOS 16.0, *) {
                        self.interfaceController?.presentTemplate(alert, animated: true, completion: { isSuccess, error in
                            if let err = error {
                                appPrint("Category Success presentTemplate error: ", err)
                            }
                        })
                    } else {
                        self.interfaceController?.showAlertTemplate(alert, animated: true, completion: { isSuccess, error in
                            if let err = error {
                                appPrint("Category Success showAlertTemplate error: ", err)
                            }
                        })
                    }
                }
            }
        }
    })
    
    let actionSheet = CPActionSheetTemplate(title: "auto_app_request-audio-carplay-title".translated, message: "auto_app_request-audio-carplay-text".translated, actions: [actOk, actDismiss])

    if #available(iOS 16.0, *) {
        interfaceController?.presentTemplate(actionSheet, animated: true, completion: { isSuccess, error in
            if let err = error {
                appPrint("Category presentTemplate error: ", err)
            }
        })
    } else {
        interfaceController?.showActionSheetTemplate(actionSheet, animated: true, completion: { isSuccess, error in
            if let err = error {
                appPrint("Category showActionSheetTemplate error: ", err)
            }
        })
    }
}

方案2：降级使用CPAlertTemplate替代 #

如果不需要严格保留ActionSheet样式，可以在iOS15及以下系统中用CPAlertTemplate替代CPActionSheetTemplate，该模板在所有目标版本中都能通过presentTemplate正常展示，代码示例：

func showRequestSheet(_ id: String) {
    appPrint("Category Clicked: ", id)

    let actDismiss = CPAlertAction(title: "Dismiss", style: .destructive, handler: { action in
        self.interfaceController?.dismissTemplate(animated: true, completion: nil)
    })
    
    let actOk = CPAlertAction(title: "ok".translated, style: .default, handler: { action in
        if let category = CPHelper.shared.arrCategories.first(where: { $0.id == id }) {
            self.interfaceController?.dismissTemplate(animated: true, completion: nil)
            CPHelper.shared.requestAudioAPI(category.name) { (isSuccess, error) in
                if let err = error {
                    let actDone = CPAlertAction(title: "e-mail_registration_password-strength-ok".translated, style: .default, handler: { action in
                        self.interfaceController?.dismissTemplate(animated: true, completion: nil)
                    })
                    let alert = CPAlertTemplate(titleVariants: [err.translated], actions: [actDone])
                    self.interfaceController?.presentTemplate(alert, animated: true, completion: { isSuccess, error in
                        if let err = error {
                            appPrint("Category Success presentTemplate error: ", err)
                        }
                    })
                }
            }
        }
    })
    
    // 用CPAlertTemplate替代CPActionSheetTemplate
    let alertTemplate = CPAlertTemplate(
        titleVariants: ["auto_app_request-audio-carplay-title".translated],
        messageVariants: ["auto_app_request-audio-carplay-text".translated],
        actions: [actOk, actDismiss]
    )

    interfaceController?.presentTemplate(alertTemplate, animated: true, completion: { isSuccess, error in
        if let err = error {
            appPrint("Category presentTemplate error: ", err)
        }
    })
}

内容的提问来源于stack exchange，提问作者Sudhir Dadhania