Question

我将Speechkit大量集成到我的应用程序的一个视图控制器中。 Speechkit仅适用于iOS 10，但我还需要我的应用程序才能在iOS 9设备上运行。

现在，我的应用程序在iOS 9设备上启动时崩溃了;如何防止Speechkit崩溃iOS 9及更早版本？我可以创建两个单独的视图控制器文件，还是必须将if #available(iOS 10, *) {放在每个Speechkit参考文件周围？

修改：我该怎么办呢？

import Speech
class ViewController2: UIViewController, SFSpeechRecognizerDelegate {

if #available(iOS 9, *) { // ERROR: Expected Declaration
private let speechRecognizer = SFSpeechRecognizer(locale: Locale(identifier: "en-US"))!
}

func doSomeStuffWithSpeech() {
...
}

...

}

Answer 1

我有大量集成的Speechkit

如果是这样，我认为创建两个独立的viewControllers可能更容易 - 或者更符合逻辑 - 您可以根据#available(iOS 10.0, *)

决定应该查看哪一个

假设您将基于点击另一个ViewController中的按钮来呈现ViewController2（在代码段中，我称之为PreviousViewController）：

class PreviousViewController: UIViewController {
    //...

    @IBAction func presentApproriateScene(sender: AnyObject) {
        if #available(iOS 10.0, *) {
            // present the ViewController that heavily integrated with Speechkit
            // maybe by perfroming a segue:
            performSegueWithIdentifier("segue01", sender: self)

            // or maybe by getting the it from the storyboard
            let storyboard = UIStoryboard(name: "Main", bundle: nil)
            let vc1 = storyboard.instantiateViewControllerWithIdentifier("vc1")
            presentViewController(vc1, animated: true, completion: nil)

        } else {
            // present the ViewController that does not suupport Speechkit
            // maybe by perfroming a segue:
            performSegueWithIdentifier("segue02", sender: self)

            // or maybe by getting the it from the storyboard
            let storyboard = UIStoryboard(name: "Main", bundle: nil)
            let vc2 = storyboard.instantiateViewControllerWithIdentifier("vc2")
            presentViewController(vc2, animated: true, completion: nil)
        }
    }

    //...
}

，您可以在声明变量时使用它：

class ViewController: UIViewController {
    //...

    if #available(iOS 10.0, *) {
        private let speechRecognizer = SFSpeechRecognizer(locale: Locale(identifier: "en-US"))!
    } else {
        // ...
    }

    //...
}

但是，正如你所提到的，如果你有＆＃34;沉重的＆＃34;与Speechkit集成，我假设制作两个Viewcontrollers更合乎逻辑。

希望这会有所帮助。

阻止Speechkit崩溃iOS 9设备

1 个答案: