// PinyinToneType: none, toneNumber
// PinyinVCharType: vCharacter, uUnicode, uAndColon
// PinyinCaseType: lowercased, uppercased, capitalized
let outputFormat = PinyinOutputFormat(toneType: .none, vCharType: .vCharacter, caseType: .lowercased)

print("我爱中文".toPinyin(withFormat: outputFormat, separator: " "))
// wo ai zhong wen

print("我愛說中國話".toPinyin(withFormat: outputFormat, separator: " "))
// wo ai shuo zhong guo hua

print("我爱中文".toPinyinAcronym())
// wazw

print("I love Chinese.".toPinyin())
// I love Chinese.

"我爱中文".toPinyin { (pinyin) in
    // do something
}

"我爱中文".toPinyinAcronym { (pinyin) in
    // do something
}

print("我爱中文".hasChineseCharacter)
// true
print("I love Chinese.".hasChineseCharacter)
// false