Swift5语法判断给定字符串是否是有效的Email地址，网上找到的使用
NSDataDetector
NSDataDetector的方式应该有误，发现类似abc@sina.cn.
abc@sina.cn.这样的地址会判断为正确的Email地址，所以应该使用正则表达式比较保险，直接给出工具方法（2种方式）：
普通工具方法
func isEmail(source: String) -> Bool {
let emailRegEx = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,64}"
let emailPredicate = NSPredicate(format:"SELF MATCHES %@", emailRegEx)
return emailPredicate.evaluate(with: source)
}
func isEmail(source: String) -> Bool {
let emailRegEx = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,64}"
let emailPredicate = NSPredicate(format:"SELF MATCHES %@", emailRegEx)
return emailPredicate.evaluate(with: source)
}
func isEmail(source: String) -> Bool {
let emailRegEx = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,64}"
let emailPredicate = NSPredicate(format:"SELF MATCHES %@", emailRegEx)
return emailPredicate.evaluate(with: source)
}
用Extension的方式
extension String {
var isEmail: Bool {
let emailRegEx = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,64}"
let emailPredicate = NSPredicate(format:"SELF MATCHES %@", emailRegEx)
return emailPredicate.evaluate(with: self)
}
}
// 如何使用
var string = "abc@sina.cn."
print(string.isEmail)
string = "abc@sina.cn"
print(string.isEmail)
extension String {
var isEmail: Bool {
let emailRegEx = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,64}"
let emailPredicate = NSPredicate(format:"SELF MATCHES %@", emailRegEx)
return emailPredicate.evaluate(with: self)
}
}
// 如何使用
var string = "abc@sina.cn."
print(string.isEmail)
string = "abc@sina.cn"
print(string.isEmail)
extension String {
var isEmail: Bool {
let emailRegEx = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,64}"
let emailPredicate = NSPredicate(format:"SELF MATCHES %@", emailRegEx)
return emailPredicate.evaluate(with: self)
}
}
// 如何使用
var string = "abc@sina.cn."
print(string.isEmail)
string = "abc@sina.cn"
print(string.isEmail)
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