@objc class func switchHEXstring_to_string(chars:[UInt8]) -> String {
var chaArr : [UInt8] = [UInt8]()
for b : UInt8 in chars {
if b == 255 { //将255的数据清除
}else {
chaArr.append(b)
}
}
var str : String? = String(bytes: chaArr, encoding: String.Encoding.utf8)
return str ?? ""
}










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