iOS - 在应用程序崩溃前截取屏幕截图

Question

有什么方法可以在应用程序崩溃之前截取屏幕截图。我正在使用此代码截取屏幕截图，但如何知道应用何时会崩溃？

func screenShotMethod() {

    //Create the UIImage
    UIGraphicsBeginImageContext(view.frame.size)
    view.layer.renderInContext(UIGraphicsGetCurrentContext())
    let image = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()
    //Save it to the camera roll
    UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil)
}

Answer 1

AppDelegate:

func applicationWillTerminate(application: UIApplication) {
    //that methiod is called when app is going to crash
}