尝试在iOS模拟器中使用相机后，即使执行抓拍处理，应用也会冻结 [英] App freezes after trying to use camera in iOS simulator even with do catch handling

问题描述

我正在尝试将摄像头功能快速添加到我的应用程序3中.由于iOS模拟器没有摄像头，因此我编写了一个do catch，以使该应用程序无法在模拟器中使用摄像头后继续运行.

I am trying to add camera functionality to my app in swift 3. Since the iOS simulator has no camera, I wrote a do catch to allow the app to continue running after it fails to use the camera in the simulator.

do{
    let captureDeviceInput = try AVCaptureDeviceInput(device: captureDevice)
    captureSession.addInput(captureDeviceInput)

}catch{
    print("there was an error adding camera as input:  ")
    print(error.localizedDescription)
}

返回的错误是无法记录".但是，这只会完全冻结该应用程序.我在错误处理中是否缺少某些东西，或者这是使用模拟器不可避免的副作用?

the error returned is "Cannot Record". However, this just freezes the app completely. Am I missing something in my error handling or is this an unavoidable side effect of using simulator?

推荐答案

这不是引发的异常.您完全不能在模拟器 上使用AVCaptureDeviceInput.

This is not a thrown exception. You must not use AVCaptureDeviceInput on the simulator at all.

使用#if arch(x86_64)可以避免在为模拟器进行编译时甚至出现与摄像机有关的任何代码.

Use #if arch(x86_64) to avoid having any code involving the camera even be present when compiling for the simulator.

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