Comment puis-je limiter les caractères spéciaux dans une UITextField
à l'exception des points et des traits de soulignement?
J'ai essayé l'extrait de code ci-dessous, mais sans succès:
#define ACCEPTABLE_CHARECTERS @" ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_."
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
NSCharacterSet *acceptedInput = [NSCharacterSet characterSetWithCharactersInString:ACCEPTABLE_CHARECTERS];
if (![[string componentsSeparatedByCharactersInSet:acceptedInput] count] > 1){
NSLog(@"not allowed");
return NO;
}
else{
return YES;
}
}
Essayez le bloc de code donné ci-dessous, cela a bien fonctionné pour moi.
Swift 3.0
let ACCEPTABLE_CHARACTERS = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_"
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
let cs = NSCharacterSet(charactersIn: ACCEPTABLE_CHARACTERS).inverted
let filtered = string.components(separatedBy: cs).joined(separator: "")
return (string == filtered)
}
Objectif c
#define ACCEPTABLE_CHARACTERS @" ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_."
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
NSCharacterSet *cs = [[NSCharacterSet characterSetWithCharactersInString:ACCEPTABLE_CHARACTERS] invertedSet];
NSString *filtered = [[string componentsSeparatedByCharactersInSet:cs] componentsJoinedByString:@""];
return [string isEqualToString:filtered];
}
J'espère que cela fonctionnera pour vous aussi.
Essaye ça
NSCharacterSet *set= [NSCharacterSet symbolCharacterSet];
if ([string rangeOfCharacterFromSet:[set invertedSet]].location == NSNotFound) {
// valid
} else {
// invalid
}
vous pouvez faire votre propre set avec
NSCharacterSet *set= [NSCharacterSet characterSetWithCharactersInString:@"<all your symbols you want to ignore>"];
Swift 2.2 basé sur réponse de Mrunal :
let notAllowedCharacters = " ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_.";
func textField(
textField: UITextField,
shouldChangeCharactersInRange range: NSRange,
replacementString string: String)
-> Bool
{
let set = NSCharacterSet(charactersInString: notAllowedCharacters);
let inverted = set.invertedSet;
let filtered = string
.componentsSeparatedByCharactersInSet(inverted)
.joinWithSeparator("");
return filtered == string;
}
NSString *Regex = @"[A-Za-z0-9^]*";
NSPredicate *TestResult = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", Regex];
[TestResult evaluateWithObject:@"YourTestString"];
Dernier retour booléen true/false
En méthode
+ (BOOL) validateSpecialCharactor: (NSString *) text {
NSString *Regex = @"[A-Za-z0-9^]*";
NSPredicate *TestResult = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", Regex];
return [TestResult evaluateWithObject:text];
}
solution Swift 3.1
let ACCEPTABLE_CHARACTERS = " ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_."
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
let cs = CharacterSet(charactersIn: ACCEPTABLE_CHARACTERS).inverted
let filtered: String = (string.components(separatedBy: cs) as NSArray).componentsJoined(by: "")
return (string == filtered)
}
Cela peut vous aider à essayer ceci .. et laissez-moi savoir s'il vous plaît
-(BOOL)isHaveSpecialChar:(NSString*)str{
NSString *customStr = @"~`!@#$%^&*()+=-/;:\"\'{}[]<>^?, ";
NSCharacterSet *alphaSet = [NSCharacterSet characterSetWithCharactersInString:customStr];
BOOL isHaveSpecialChar = [[str stringByTrimmingCharactersInSet:alphaSet] isEqualToString:@""];
return !isHaveSpecialChar;
}
Swift 4
let RISTRICTED_CHARACTERS = "'*=+[]\\|;:'\",<>/?%"
Méthode de délégué UITextField:
func textField(_ textField: UITextField, shouldChangeCharactersIn _: NSRange, replacementString string: String) -> Bool {
let set = CharacterSet(charactersIn: RISTRICTED_CHARACTERS)
let inverted = set.inverted
let filtered = string.components(separatedBy: inverted).joined(separator: "")
return filtered != string
}
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
let set = NSCharacterSet(charactersIn: "0123456789")
let inverted = set.inverted;
let filtered = string.components(separatedBy: inverted).joined(separator: "")
return filtered == string;