- Boot from Ubuntu server
- Insert Guest Addition CD
(Devices menu – Insert Guest Addition CD image…)
- Mount Guest Addition CD
$ sudo mkdir /media/cdrom $ sudo mount /dev/cdrom /media/cdrom $ cd /media/cdrom
- Install packages
$ sudo apt-get install -y dkms build-essential linux-headers-generic linux-headers-$(uname -r)
- Install Guest Addition
$ sudo su $ ./VBoxLinuxAdditions.run
$ chmod 600 '.pem file' $ ssh-keygen -f '.pem file' -y >> ~/.ssh/authorized_keys
Already did burned the booting image on the board following the post.
And then let’s do burning the booting image on eMMC of the board.
1. .zip image in USB stick
If the booting image needed, download it at the link.
And copy the image to the USB stick.
2. Insert the USB stick to the BPI board
3. Mount the USB on the BPI board
$ sudo mount ‘USB path’ ‘directory’
(Ex. $ sudo mount /dev/sda1 /usb)
4. Burn the image with ‘bpi-copy’ command
$ bpi-copy ‘image path’
(Ex. $ bpi-copy /usb/2017-11-13-ubuntu-16.04-mate-desktop-beta2-bpi-m2u-sd-emmc.img.zip)
Ctrl + T
The ‘dd’ command doesn’t show the working progress.
Press ‘Ctrl + T’, then it will shout the process information~!
Xcode Version 9.0.1
Button click action makes error
unrecognized selector sent to instance
Select View Controller instead of other objects as an object when connecting UIButton action
open terminal and type the command
$ xcrun simctl io booted recordVideo ‘filename.extension’
(Ex. $ xcrun simctl io booted recordVideo video.mp4)
Xcode Version 9.0.1
Error occurs whenever control-drag to connect ui and source from storyboard to .swift file like the screenshot.
Terminating app due to uncaught exception ‘NSUnknownKeyException’, reason: ‘[ setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key
Try control-drag from an UI image in storyboard to a source code like the above image.
And then build and run an application.
After this, the both ways works.
1st – control-drag from a title of an UI in storyboard to a source file.
2nd – control-drag from an UI image in story board to a source file.
I don’t understand why. But it works for me.