xcode 用于手机号码验证的 NSPredicate
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NSPredicate for mobile number validation
提问by Harshit K
How to validate a phone number (NSString *) by NSPredicate?
如何通过 NSPredicate 验证电话号码 (NSString *)？
Rules:
规则：
minimum 10 digits
最少 10 位数字
maximum 10 digits
最多 10 位
the first digit must be 7,8 or 9 Thanks
第一个数字必须是 7,8 或 9 谢谢
回答by Monolo
An NSPredicatebased on a regular expression will fit your requirements.
一种NSPredicate基于正则表达式将满足您的要求。
NSString *stringToBeTested = @"8123456789";
NSString *mobileNumberPattern = @"[789][0-9]{9}";
NSPredicate *mobileNumberPred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", mobileNumberPattern];
BOOL matched = [mobileNumberPred evaluateWithObject:stringToBeTested];
You don't need to keep the pattern in a string by itself, but regexes are complicated enough already so it makes the overall code clearer if you keep it out of the NSPredicateformat string.
您不需要将模式单独保留在字符串中，但正则表达式已经足够复杂，因此如果将其保留在NSPredicate格式字符串之外，它会使整个代码更清晰。
回答by Kirtikumar A.
You can just use below code
你可以只使用下面的代码
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string; // return NO to not change text
{
if(textField.tag == 111)
{
if([self MobileNumberValidate:string] == TRUE)
return YES;
else
return NO;
}
return YES;
}
#pragma mark - Mobile Number validation
- (BOOL)MobileNumberValidate:(NSString*)number
{
NSString *numberRegEx = @"[0-9]";
NSPredicate *numberTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", numberRegEx];
if ([numberTest evaluateWithObject:number] == YES)
return TRUE;
else
return FALSE;
}
回答by Raj Aryan
Below code will work for your requirement:
下面的代码将适用于您的要求：
Function:
功能：
-(BOOL)validatePhone:(NSString *)enteredPhoneNumber
{
NSString *phoneRegex = @"[789][0-9]{9}";
// OR below for advanced type
//NSString *phoneRegex = @"^((\+)|(00))[0-9]{6,14}$";
NSPredicate *phoneTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", phoneRegex];
return [phoneTest evaluateWithObject:enteredPhoneNumber];
}
Call it:
称它为：
if ([self validatePhone:@"9833112299"])
{
NSLog(@"Valid Phone Number");
}
else
{
NSLog(@"Invalid Phone Number");
}
回答by vilas deshmukh
Make it Global using 'extension' use it wherever required
使用“扩展”使其成为全球性的，在需要的地方使用它
In any one of your view controller class at the end after last }paste below code
在最后的任何一个视图控制器类中最后}粘贴下面的代码
extension String
{
func validateMobile() -> Bool
{
return NSPredicate(format: "SELF MATCHES %@","[789][0-9].{9}").evaluate(with: self)
}
}
when you want to validate yourTxtField in any ViewController class simply call as below:
当你想在任何 ViewController 类中验证 yourTxtField 时，只需调用如下：
if (yourTxtField.text?.validateMobile())!
{
print("It is 10 digit, starting with 7/8/9")
}
else
{
print("Invalid mobile number")
}
回答by 08442
NSString *phoneNumber = @"1234567890";
NSString *phoneRegex = @"[789][0-9]{3}([0-9]{6})?";
NSPredicate *test = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", phoneRegex];
BOOL matches = [test evaluateWithObject:phoneNumber];
