extension String {
//是否包含英文字元串
func contains(find: String) -> Bool{
return self.rangeOfString(find) != nil || self.rangeOfString(find, options: .RegularExpressionSearch) != nil
}
//是否包含中文字元串
func containChineseString(find: String) -> Bool{
return self.rangeOfString(find, options: .RegularExpressionSearch) != nil
}
//是否包含數字字元串
func containNumbericString(find: String) -> Bool{
return self.rangeOfString(find, options: .NumericSearch) != nil
}
}