Swift - 把漢字轉換為拼音，並且截取首字母做索引用

 

var transformContents = CFStringCreateMutableCopy(nil, 0, "咋啊的看到回復阿斯頓發貨發哦iasdifas")

CFStringTransform(transformContents, nil, kCFStringTransformMandarinLatin, 0)

var traStr:String = transformContents as String

let index = advance(traStr.startIndex, 1)

traStr.uppercaseString.substringToIndex(index)