iOS 中 textField 的电子邮件验证
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时间：2020-08-30 19:22:06 来源:igfitidea点击:
Email validation on textField in iOS
提问by ios
In iOS App, how to add Email validation on UITextField?
在 iOS App 中，如何在 UITextField 上添加电子邮件验证？
回答by Rog
Use NSPredicate and Regex:
使用 NSPredicate 和 Regex：
- (BOOL)validateEmailWithString:(NSString*)email
{
NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}";
NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];
return [emailTest evaluateWithObject:email];
}
For a bunch of emails separated by a comma:
对于以逗号分隔的一堆电子邮件：
- (NSMutableArray*)validateEmailWithString:(NSString*)emails
{
NSMutableArray *validEmails = [[NSMutableArray alloc] init];
NSArray *emailArray = [emails componentsSeparatedByString:@","];
for (NSString *email in emailArray)
{
NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}";
NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];
if ([emailTest evaluateWithObject:email])
[validEmails addObject:email];
}
return [validEmails autorelease];
}
Edited Answer: (It also validates extra dots )
编辑答案：（它还验证额外的点）
- (BOOL)validateEmailWithString:(NSString*)checkString
{
BOOL stricterFilter = NO; // Discussion http://blog.logichigh.com/2010/09/02/validating-an-e-mail-address/
NSString *stricterFilterString = @"[A-Z0-9a-z\._%+-]+@([A-Za-z0-9-]+\.)+[A-Za-z]{2,4}";
NSString *laxString = @".+@([A-Za-z0-9-]+\.)+[A-Za-z]{2}[A-Za-z]*";
NSString *emailRegex = stricterFilter ? stricterFilterString : laxString;
NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];
return [emailTest evaluateWithObject:checkString];
}
回答by SNR
Try this out
This checks exactly with top level domain names along with validation.
试试这个
这与顶级域名和验证完全一致。
- (BOOL)validateEmail:(NSString *)inputText {
NSString *emailRegex = @"[A-Z0-9a-z][A-Z0-9a-z._%+-]*@[A-Za-z0-9][A-Za-z0-9.-]*\.[A-Za-z]{2,6}";
NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];
NSRange aRange;
if([emailTest evaluateWithObject:inputText]) {
aRange = [inputText rangeOfString:@"." options:NSBackwardsSearch range:NSMakeRange(0, [inputText length])];
int indexOfDot = aRange.location;
//NSLog(@"aRange.location:%d - %d",aRange.location, indexOfDot);
if(aRange.location != NSNotFound) {
NSString *topLevelDomain = [inputText substringFromIndex:indexOfDot];
topLevelDomain = [topLevelDomain lowercaseString];
//NSLog(@"topleveldomains:%@",topLevelDomain);
NSSet *TLD;
TLD = [NSSet setWithObjects:@".aero", @".asia", @".biz", @".cat", @".com", @".coop", @".edu", @".gov", @".info", @".int", @".jobs", @".mil", @".mobi", @".museum", @".name", @".net", @".org", @".pro", @".tel", @".travel", @".ac", @".ad", @".ae", @".af", @".ag", @".ai", @".al", @".am", @".an", @".ao", @".aq", @".ar", @".as", @".at", @".au", @".aw", @".ax", @".az", @".ba", @".bb", @".bd", @".be", @".bf", @".bg", @".bh", @".bi", @".bj", @".bm", @".bn", @".bo", @".br", @".bs", @".bt", @".bv", @".bw", @".by", @".bz", @".ca", @".cc", @".cd", @".cf", @".cg", @".ch", @".ci", @".ck", @".cl", @".cm", @".cn", @".co", @".cr", @".cu", @".cv", @".cx", @".cy", @".cz", @".de", @".dj", @".dk", @".dm", @".do", @".dz", @".ec", @".ee", @".eg", @".er", @".es", @".et", @".eu", @".fi", @".fj", @".fk", @".fm", @".fo", @".fr", @".ga", @".gb", @".gd", @".ge", @".gf", @".gg", @".gh", @".gi", @".gl", @".gm", @".gn", @".gp", @".gq", @".gr", @".gs", @".gt", @".gu", @".gw", @".gy", @".hk", @".hm", @".hn", @".hr", @".ht", @".hu", @".id", @".ie", @" No", @".il", @".im", @".in", @".io", @".iq", @".ir", @".is", @".it", @".je", @".jm", @".jo", @".jp", @".ke", @".kg", @".kh", @".ki", @".km", @".kn", @".kp", @".kr", @".kw", @".ky", @".kz", @".la", @".lb", @".lc", @".li", @".lk", @".lr", @".ls", @".lt", @".lu", @".lv", @".ly", @".ma", @".mc", @".md", @".me", @".mg", @".mh", @".mk", @".ml", @".mm", @".mn", @".mo", @".mp", @".mq", @".mr", @".ms", @".mt", @".mu", @".mv", @".mw", @".mx", @".my", @".mz", @".na", @".nc", @".ne", @".nf", @".ng", @".ni", @".nl", @".no", @".np", @".nr", @".nu", @".nz", @".om", @".pa", @".pe", @".pf", @".pg", @".ph", @".pk", @".pl", @".pm", @".pn", @".pr", @".ps", @".pt", @".pw", @".py", @".qa", @".re", @".ro", @".rs", @".ru", @".rw", @".sa", @".sb", @".sc", @".sd", @".se", @".sg", @".sh", @".si", @".sj", @".sk", @".sl", @".sm", @".sn", @".so", @".sr", @".st", @".su", @".sv", @".sy", @".sz", @".tc", @".td", @".tf", @".tg", @".th", @".tj", @".tk", @".tl", @".tm", @".tn", @".to", @".tp", @".tr", @".tt", @".tv", @".tw", @".tz", @".ua", @".ug", @".uk", @".us", @".uy", @".uz", @".va", @".vc", @".ve", @".vg", @".vi", @".vn", @".vu", @".wf", @".ws", @".ye", @".yt", @".za", @".zm", @".zw", nil];
if(topLevelDomain != nil && ([TLD containsObject:topLevelDomain])) {
//NSLog(@"TLD contains topLevelDomain:%@",topLevelDomain);
return TRUE;
}
/*else {
NSLog(@"TLD DOEST NOT contains topLevelDomain:%@",topLevelDomain);
}*/
}
}
return FALSE;
}
回答by Gypsa
Use the below code:-
使用以下代码：-
NSString *emailRegEx = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}";
NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegEx];
//Valid email address
if ([emailTest evaluateWithObject:userMailTextField.text] == YES)
{
//Do Something
}
else
{
NSLog(@"email not in proper format");
}
userMailTextField is the name of my textField (use your own).
userMailTextField 是我的 textField 的名称（使用您自己的）。
I hope this code will help you!!!
希望这段代码能帮到你！！！
回答by Ilesh P
Use Below code for "Swift language"For Email Validation
使用下面的“Swift 语言”代码进行电子邮件验证
func ValidateEmailString (strEmail:NSString) -> Bool
{
let emailRegex = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}"
let emailText = NSPredicate(format:"SELF MATCHES [c]%@",emailRegex)
return (emailText!.evaluateWithObject(strEmail))
}
Thanks :)
谢谢 ：）
回答by Bhavin
NSRegularExpressionis the Best Way to Validate Email Addresseswith iOS 4.xand Later.
NSRegularExpression是使用iOS 4.x及更高版本验证电子邮件地址的最佳方式。
-(BOOL) validateEmail:(NSString*) emailString
{
NSString *regExPattern = @"^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$";
NSRegularExpression *regEx = [[NSRegularExpression alloc] initWithPattern:regExPattern options:NSRegularExpressionCaseInsensitive error:nil];
NSUInteger regExMatches = [regEx numberOfMatchesInString:emailString options:0 range:NSMakeRange(0, [emailString length])];
NSLog(@"%i", regExMatches);
if (regExMatches == 0) {
return NO;
}
else
return YES;
}
Usage :
用法 ：
if([self validateEmail:@"[email protected]"]) {
//Email Address is valid.
}
else {
//Email Address is invalid.
}
回答by shankar
--it's easy to validate your email id by calling validateEmailmethod:
--通过调用validateEmail方法很容易验证您的电子邮件ID ：
-(BOOL)validateEmail:(NSString *)email
{
NSString *emailRegex = @"[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?";
NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];
return [emailTest evaluateWithObject:email];
}
Verify your email id here....
在此处验证您的电子邮件 ID....
BOOL eb=[self validateEmail:**youremailtextfield**];
if(!eb)
{
UIAlertView *alertsuccess = [[UIAlertView alloc] initWithTitle:@"Sorry" message:@"Please enter correct email id"
delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
[alertsuccess show];
[alertsuccess release];
}
回答by Anil
- (BOOL)validateEmailAddress:(NSString*)yourEmail
{
//create a regex string which includes all email validation
NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}";
//create predicate with format matching your regex string
NSPredicate *email = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];
//return True if your email address matches the predicate just formed
return [email evaluateWithObject:yourEmail];`
}
回答by User558
Here the simple way to validate email in obj c
这是在 obj c 中验证电子邮件的简单方法
if(![self validEmail:self.emailTxtFld.text]) {
// here show alert not a valid email id
}
here valid email id method is
这里有效的电子邮件 ID 方法是
- (BOOL) validEmail:(NSString*) emailString {
if([emailString length]==0){
return NO;
}
NSString *regExPattern = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}";
NSRegularExpression *regEx = [[NSRegularExpression alloc] initWithPattern:regExPattern options:NSRegularExpressionCaseInsensitive error:nil];
NSUInteger regExMatches = [regEx numberOfMatchesInString:emailString options:0 range:NSMakeRange(0, [emailString length])];
if (regExMatches == 0) {
return NO;
} else {
return YES;
}
}
In Swift 3.0Version
在Swift 3.0版本中
if !validEmailId(inputText: userNameTxtFld.text!) {
print("Not Valid Emaild")
}
else {
print("valid email id")
}
func validEmailId(inputText: String)-> Bool {
print("validate emilId: \(inputText)")
let emailRegEx = "^(?:(?:(?:(?: )*(?:(?:(?:\t| )*\r\n)?(?:\t| )+))+(?: )*)|(?: )+)?(?:(?:(?:[-A-Za-z0-9!#$%&'*+/=?^_'{|}~]+(?:\.[-A-Za-z0-9!#$%&'*+/=?^_'{|}~]+)*)|(?:\"(?:(?:(?:(?: )*(?:(?:[!#-Z^-~]|\[|\])|(?:\\(?:\t|[ -~]))))+(?: )*)|(?: )+)\"))(?:@)(?:(?:(?:[A-Za-z0-9](?:[-A-Za-z0-9]{0,61}[A-Za-z0-9])?)(?:\.[A-Za-z0-9](?:[-A-Za-z0-9]{0,61}[A-Za-z0-9])?)*)|(?:\[(?:(?:(?:(?:(?:[0-9]|(?:[1-9][0-9])|(?:1[0-9][0-9])|(?:2[0-4][0-9])|(?:25[0-5]))\.){3}(?:[0-9]|(?:[1-9][0-9])|(?:1[0-9][0-9])|(?:2[0-4][0-9])|(?:25[0-5]))))|(?:(?:(?: )*[!-Z^-~])*(?: )*)|(?:[Vv][0-9A-Fa-f]+\.[-A-Za-z0-9._~!$&'()*+,;=:]+))\])))(?:(?:(?:(?: )*(?:(?:(?:\t| )*\r\n)?(?:\t| )+))+(?: )*)|(?: )+)?$"
let emailTest = NSPredicate(format:"SELF MATCHES %@", emailRegEx)
let result = emailTest.evaluate(with: inputText)
return result
}
回答by Raj Aryan
Function:
功能：
- (BOOL)validateEmail:(NSString *)enteredEmailID
{
//checking valid email id or not
NSString *emailReg = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}";
NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailReg];
return [emailTest evaluateWithObject:enteredEmailID];
}
Call it like:
像这样称呼它：
if ([self validateEmail: textField.text])
{
//NSLog(@"Valid Email");
}
else
{
//NSLog(@"Invalid Email");
}
EDIT:You can do this into textfield did end editing delegates or textfield should character change delegates
编辑：您可以在文本字段中执行此操作并结束编辑委托或文本字段应字符更改委托
回答by Codingpan
A version using NSRegularExpression and regex pattern copied from OWASP_Validation_Regex_Repository
使用 NSRegularExpression 和从OWASP_Validation_Regex_Repository复制的正则表达式模式的版本
+ (BOOL) isValidEmail:(NSString *)emailString {
NSError *error = NULL;
/**
* @see <a href="https://www.owasp.org/index.php/OWASP_Validation_Regex_Repository">OWASP_Validation_Regex_Repository</a>
*/
NSString *emailPattern = @"^[a-zA-Z0-9_+&*-]+(?:\.[a-zA-Z0-9_+&*-]+)*@(?:[a-zA-Z0-9-]+\.)+[a-zA-Z]{2,7}$";
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:emailPattern
options:NSRegularExpressionCaseInsensitive
error:&error];
NSUInteger matchCount = [regex numberOfMatchesInString:emailString options:0 range:NSMakeRange(0, [emailString length])];
return matchCount > 0;
}
