Swift-获取汉字大写无声调首字母

extension String

{

//获取字符串首字母并大写

func getFirstAlphabet() -> String

{

let transformContents = CFStringCreateMutableCopy(nil, 0, self)

//转为带声调

CFStringTransform(transformContents, nil, kCFStringTransformMandarinLatin, false)

//转为不带声调

CFStringTransform(transformContents, nil, kCFStringTransformStripDiacritics, false)

let traStr:String = transformContents as String

let index = traStr.startIndex.advancedBy(1)

return traStr.uppercaseString.substringToIndex(index)

}

}