Translated by OOPer in cooperation with shlab.jp, on 2015/1/18.
Based on https://developer.apple.com/library/content/samplecode/RosyWriter/Introduction/Intro.html#//apple_ref/doc/uid/DTS40011110 2016-09-13.
As this is a line-by-line translation from the original sample code, "redistribute the Apple Software in its entirety and without modifications" would apply. See LICENSE.txt . Some faults caused by my translation may exist. Not all features tested. You should not contact to Apple or SHLab(jp) about any faults caused by my translation.
iOS 14 SDK and Xcode 12.4
iOS 9.0+