标题翻译
There is a regex for email validation in java that works perfectly in android. Can someone help me convert it to swift?
问题
以下是你要翻译的内容：
在 Kotlin 中的正则表达式不允许包含空格、表情等。我希望在 Swift 中使用这个正则表达式，但它的工作方式不太一样，需要进行转换。我已经尝试过，但无法实现正确的转换。帮助将不胜感激。
在在线 Kotlin Playground 中测试的代码：
import java.util.regex.*
fun main() {
println(isValidEmailAddress(" abc@gmail.com"))
// 返回 false
println(isValidEmailAddress("a😃bc@gmail.com"))
// 返回 false
}
val EMAIL_PATTERN = Pattern.compile("[a-zA-Z0-9\\+\\.\\_\\%\\-\\+]{1,256}" +
"\\@" +
"[a-zA-Z0-9][a-zA-Z0-9\\-]{0,64}" +
"(" +
"\\." +
"[a-zA-Z0-9][a-zA-Z0-9\\-]{0,25}" +
")+")
public fun isValidEmailAddress(email: String): Boolean {
return EMAIL_PATTERN.matcher(email).matches()
}
在在线 Swift Playground 中测试的代码：
import Foundation
extension String {
func isValidEmail() -> Bool {
let regex = try! NSRegularExpression(pattern: "[a-zA-Z0-9+._%-+]{1,256}@[a-zA-Z0-9][a-zA-Z0-9-]{0,64}+\\.[a-zA-Z0-9][a-zA-Z0-9-]{0,25}+", options: .caseInsensitive)
return regex.firstMatch(in: self, options: [], range: NSRange(location: 0, length: count)) != nil
}
}
var str = " abc@gmail.com".isValidEmail()
print(str)
// 返回 true
str = "a😃bc@gmail.com".isValidEmail()
print(str)
// 返回 true
在根据建议进行更改后的回答：
import Foundation
extension String {
func isValidEmail() -> Bool {
let regex = try! NSRegularExpression(pattern: "^[a-zA-Z0-9+._%-]{1,256}@[a-zA-Z0-9][a-zA-Z0-9-]{0,64}+(\\.[a-zA-Z0-9][a-zA-Z0-9-]{0,25})+$", options: .caseInsensitive)
return regex.firstMatch(in: self, options: [], range: NSRange(location: 0, length: self.utf16.count)) != nil
}
}
var str = " abcgmail.com".isValidEmail()
print(str)
// 返回 false
str = "a😃c@gmail.com".isValidEmail()
print(str)
// 返回 false
英文翻译
The regex in kotlin does not allow white spaces, emojis etc. I want this regex to be used in swift but the regex does not work exactly and needs to be converted. I have tried but I am unable to achieve proper conversion. Help would be appreciated
Code tested in online kotlin playground
Kotlin Playground code:
import java.util.regex.*
fun main() {
println(isValidEmailAddress(" abc@gmail.com"))
// returns false
println(isValidEmailAddress("a😃bc@gmail.com"))
// returns false
}
val EMAIL_PATTERN = Pattern.compile("[a-zA-Z0-9\\+\\.\\_\\%\\-\\+]{1,256}" +
"\\@" +
"[a-zA-Z0-9][a-zA-Z0-9\\-]{0,64}" +
"(" +
"\\." +
"[a-zA-Z0-9][a-zA-Z0-9\\-]{0,25}" +
")+")
public fun isValidEmailAddress(email: String): Boolean {
return EMAIL_PATTERN.matcher(email).matches()
}
Code tested in online swift playground
Swift Playground code:
import Foundation
extension String {
func isValidEmail() -> Bool {
let regex = try! NSRegularExpression(pattern: "[a-zA-Z0-9+._%-+]{1,256}@[a-zA-Z0-9][a-zA-Z0-9-]{0,64}+\\.[a-zA-Z0-9][a-zA-Z0-9-]{0,25}+", options: .caseInsensitive)
return regex.firstMatch(in: self, options: [], range: NSRange(location: 0, length: count)) != nil
}
}
var str = " abc@gmail.com".isValidEmail()
print(str)
// returns true
str = "a😃bc@gmail.com".isValidEmail()
print(str)
// returns true
Answer after following suggested changes:
import Foundation
extension String {
func isValidEmail() -> Bool {
let regex = try! NSRegularExpression(pattern: "^[a-zA-Z0-9+._%-]{1,256}@[a-zA-Z0-9][a-zA-Z0-9-]{0,64}+(\\.[a-zA-Z0-9][a-zA-Z0-9-]{0,25})+$", options: .caseInsensitive)
return regex.firstMatch(in: self, options: [], range: NSRange(location: 0, length: self.utf16.count)) != nil
}
}
var str = " abcgmail.com".isValidEmail()
print(str)
// returns false
str = "a😃c@gmail.com".isValidEmail()
print(str)
// returns false
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