在设备上运行但不在 Swift 模拟器中运行时的断点

Question

我在模拟器上正常运行这个应用程序，但是当我在实际设备上尝试它时它崩溃了，但与大多数断点不同的是，没有消息只是“与设备的连接丢失”弹出窗口。每次我在设备上运行它时都会发生这种情况，但从不在模拟器中运行。不是连接线的问题。

我有很多代码，但重要的是：

    print("Test-1")
            let imageView2 = uiview


            // Find the path where to

 save
        guard let myFilePath = createMyFilePath(forFileName: "Page1test.png") else {
            print("Cannot generate file path ☹️")
            exit(0)
        }

        // Use this to check in finder where your file is saved
        print(myFilePath)
        print("Test")

        // Transform the imageView in UIImage to save it
        let imageToSave = createImage(fromView: imageView2)

        // Get the image as data
        guard let imageToSaveAsData = UIImagePNGRepresentation(imageToSave) else {
            print("Cannot transform image to data ☹️")
            exit(1)
        }

        // Save to Disk!
        do{
            try imageToSaveAsData.writeToFile(myFilePath, options: .DataWritingAtomic)
        } catch {
            print("Error, cannot write to the location \(myFilePath)")
        }


        // Load from Disk!
        let loadedImageData = NSData(contentsOfFile: myFilePath)

        // Check the data is the same
        if loadedImageData == imageToSaveAsData {
            print("✌️")
        }

        // Have a look at the loaded image!
        var bob = UIImage(data: loadedImageData!)

        imageviewloaded.image = bob


        //Page 2

        let imageViewtest = uiview2


        // Find the path where to save
        guard let myFilePathtest = createMyFilePath(forFileName: "Page2test.png") else {
            print("Cannot generate file path ☹️")
            exit(0)
        }

        // Use this to check in finder where your file is saved
        print(myFilePathtest)

        // Transform the imageView in UIImage to save it
        let imageToSavetest = createImage(fromView: imageViewtest)

        // Get the image as data
        guard let imageToSaveAsDatatest = UIImagePNGRepresentation(imageToSavetest) else {
            print("Cannot transform image to data ☹️")
            exit(1)
        }

        // Save to Disk!
        do{
            try imageToSaveAsDatatest.writeToFile(myFilePathtest, options: .DataWritingAtomic)
        } catch {
            print("Error, cannot write to the location \(myFilePath)")
        }

        // Load from Disk! Page 2
        let loadedImageDatatest = NSData(contentsOfFile: myFilePathtest)

        // Check the data is the same
        if loadedImageDatatest == imageToSaveAsDatatest {
            print("✌️")
        }

        // Have a look at the loaded image!
        var bobtest = UIImage(data: loadedImageDatatest!)

        var imagecool = UIImageView()
        imagecool.image = bobtest

        //Page 4

        let imageViewPage4 = uiview3


        // Find the path where to save
        guard let myFilePathPage4 = createMyFilePath(forFileName: "Page4test.png") else {
            print("Cannot generate file path ☹️")
            exit(0)
        }

        // Use this to check in finder where your file is saved
        print(myFilePathtest)

        // Transform the imageView in UIImage to save it
        let imageToSavePage4 = createImage(fromView: imageViewPage4)

        // Get the image as data
        guard let imageToSaveAsDataPage4 = UIImagePNGRepresentation(imageToSavePage4) else {
            print("Cannot transform image to data ☹️")
            exit(1)
        }

        // Save to Disk!
        do{
            try imageToSaveAsDataPage4.writeToFile(myFilePathPage4, options: .DataWritingAtomic)
        } catch {
            print("Error, cannot write to the location \(myFilePath)")
        }

        // Load from Disk! Page 4
        let loadedImageDataPage4 = NSData(contentsOfFile: myFilePathPage4)

        // Check the data is the same
        if loadedImageDataPage4 == imageToSaveAsDataPage4 {
            print("✌️")
        }

        // Have a look at the loaded image!
        var bobPage4 = UIImage(data: loadedImageDataPage4!)

        var imagepage4 = UIImageView()
        imagepage4.image = bobPage4

         print("Test--2")

我在控制台中得到一个打印输出：

我不知道发生了什么。有人可以帮忙吗？

Answer 1

我认为这是内存问题，可能与图像大小有关，您可能需要查看代码并尝试调整图像大小。这个答案可以帮助您弄清楚为什么会出现此错误尝试检查它communication problem。希望对你有帮助