国际音标自1888年确定一字一音形式至今历经数次增删,使用的字母及附加符号逾150个,远远超过键盘的键位数,要在QWERTY键盘上输入国际音标字母,就需要设计一种“多键位——单字符”的输入方式并利用某些软件层面的机制编写相应的输入法。为方便计,下文将Unicode内收录的所有国际音标字母及附加符号的总集合称为国际音标字符集。目前国 International phonetic alphabet since 1888 to determine the form of the word has gone through several additions and deletions, the use of letters and additional symbols more than 150, far more than the number of keys on the keyboard, to enter the IPT keyboard QWERTY phonetic alphabet, you need to design a Type “multi-key bit - single character” input and use some software-level mechanism to write the appropriate input method. For convenience, the total set of all IPA letters and additional symbols included in Unicode is hereinafter referred to as IPA character set. The current country