swift4.0 正则表达式判断手机号

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class func isTelNumber(num:NSString)->Bool

{

let mobile = "^1((3[0-9]|4[57]|5[0-35-9]|7[0678]|8[0-9])\\d{8}$)"

let  CM = "(^1(3[4-9]|4[7]|5[0-27-9]|7[8]|8[2-478])\\d{8}$)|(^1705\\d{7}$)";

let  CU = "(^1(3[0-2]|4[5]|5[56]|7[6]|8[56])\\d{8}$)|(^1709\\d{7}$)";

let  CT = "(^1(33|53|77|8[019])\\d{8}$)|(^1700\\d{7}$)";

let regextestmobile = NSPredicate(format: "SELF MATCHES %@",mobile)

let regextestcm = NSPredicate(format: "SELF MATCHES %@",CM )

let regextestcu = NSPredicate(format: "SELF MATCHES %@" ,CU)

let regextestct = NSPredicate(format: "SELF MATCHES %@" ,CT)

if ((regextestmobile.evaluate(with: num) == true)

|| (regextestcm.evaluate(with: num)  == true)

|| (regextestct.evaluate(with: num) == true)

|| (regextestcu.evaluate(with: num) == true))

{

return true

}

else

{

return false

}

}