验证NSTextField中的字符串是否为有效的IP地址或域名
验证NSTextField中的字符串是否为有效的IP地址或域名
提问于 2014-06-30 04:32:53
我有一个NSTextField，其中我要求用户输入一个IPv4格式的字符串，或者一个域名(如www.example.com )。目前，我的代码是：
@IBAction func verifyTarget(sender: NSTextFieldCell) {
var txtTarget: NSTextFieldCell = sender
var strRawTarget: String? = txtTarget.stringValue
println("Input: " + strRawTarget!)
var URLTarget: NSURL?
URLTarget = NSURL.URLWithString(strRawTarget)
if URLTarget {
println("URL \(URLTarget) is valid!")
}
else {
println("URL \(strRawTarget) is not valid!")
}
}一些示例输出：
Input:
URL is valid!
Input: adsfasdf
URL adsfasdf is valid!
Input: afe12389hfs. . afopadsf
URL afe12389hfs. . afopadsf is not valid!
Input: 192.292.111.3
URL 192.292.111.3 is valid!
Input: 0.a.0.a
URL 0.a.0.a is valid!
Input: %2
URL %2 is not valid!
Input: %20
URL %20 is valid!我做错了什么吗？
回答 6
Stack Overflow用户
回答已采纳
发布于 2014-06-30 05:47:57
NSURL.URLWithString根据解码相对地址或绝对地址的标准计算传递给它的URL字符串，这些不完全可读的文档包括RFCs、二三九六、一七三八和一八零八。也就是说，您希望验证的只是NSURL所能处理的一小部分。最好使用一两个RegEx，也许来自这个答案
@IBAction func verifyTarget(sender: NSTextFieldCell) {
var txtTarget: NSTextFieldCell = sender
var strRawTarget: String? = txtTarget.stringValue
println("Input: " + strRawTarget!)
let validIpAddressRegex = "^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$"
let validHostnameRegex = "^(([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\\-]*[a-zA-Z0-9])\\.)*([A-Za-z0-9]|[A-Za-z0-9][A-Za-z0-9\\-]*[A-Za-z0-9])$"
if strRawTarget == nil {
println("no input!")
} else if strRawTarget!.rangeOfString(validIpAddressRegex, options: .RegularExpressionSearch) {
println("\(strRawTarget) is a valid IP address")
} else if strRawTarget!.rangeOfString(validHostnameRegex, options: .RegularExpressionSearch) {
println("\(strRawTarget) is a valid hostname")
} else {
println("\(strRawTarget) is not valid")
}
}Stack Overflow用户
发布于 2016-05-06 12:01:55
在Swift中检查IP地址是IPv4还是IPv6
func validateIpAddress(ipToValidate: String) -> Bool {
var sin = sockaddr_in()
var sin6 = sockaddr_in6()
if ipToValidate.withCString({ cstring in inet_pton(AF_INET6, cstring, &sin6.sin6_addr) }) == 1 {
// IPv6 peer.
return true
}
else if ipToValidate.withCString({ cstring in inet_pton(AF_INET, cstring, &sin.sin_addr) }) == 1 {
// IPv4 peer.
return true
}
return false;
}Stack Overflow用户
发布于 2019-07-05 15:03:37
@Alin的代码以更紧凑的形式出现：
extension String {
func isIPv4() -> Bool {
var sin = sockaddr_in()
return self.withCString({ cstring in inet_pton(AF_INET, cstring, &sin.sin_addr) }) == 1
}
func isIPv6() -> Bool {
var sin6 = sockaddr_in6()
return self.withCString({ cstring in inet_pton(AF_INET6, cstring, &sin6.sin6_addr) }) == 1
}
func isIpAddress() -> Bool { return self.isIPv6() || self.isIPv4() }
}用法：
let ipv6 = "FE80:0000:0000:0000:0202:B3FF:FE1E:8329"
let ipv6Collapsed = "FE80::0202:B3FF:FE1E:8329"
let ipv4 = "19.117.63.126"
ipv6.isIpAddress() //true
ipv6.isIPv6() //true
ipv6.isIPv4() //false
ipv6Collapsed.isIpAddress() //true
ipv6Collapsed.isIPv6() //true
ipv6Collapsed.isIPv4() //false
ipv4.isIpAddress() //true
ipv4.isIPv6() //false
ipv4.isIPv4() //true页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/24482958
复制相关文章
相似问题
腾讯云开发者
