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我想验证三个UITextFields和没有任何文本字段接受超过11个字符。如果我输入第12个字符，我的文本字段会变成红色，并且我无法前往下一个字段进行输入。UITextField验证错误
我从这个链接TextField Validation With Regular Expression有一些帮助与验证，但现在我似乎无法理解为什么我所有的文本字段不能接受超过11个字符？
- (BOOL)validateInputWithString:(NSString *)aString
{
NSString* regularExpression = @"";
if (aString == self.ipAddress.text) {
regularExpression = @"^(([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\.){3}([01]?\\d\\d?|2[0-4]\\d|25[0-5])$";
} else if (aString == self.username.text) {
regularExpression = @"^[A-Za-z][A-Za-z0-9]*$";
} else if (aString == self.password.text) {
regularExpression = @"^[^\\s\\r\\n][0-9a-zA-Zk\\r\\[email protected]!#\\$\\^%&*()+=\\-\\[\\]\\\\\\';,\\.\\/\\{\\<>\\?\\s]*$";
}
NSError *error = NULL;
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern: regularExpression
options:NSRegularExpressionCaseInsensitive
error:&error];
if (error) {
NSLog(@"error %@", error);
}
NSUInteger numberOfMatches = [regex numberOfMatchesInString:aString
options:0
range:NSMakeRange(0, [aString length])];
if([self.ipAddress.text length]>0 && [self.username.text length]>0 && [self.password.text length]>0)
{
enableLogin = YES;
}
return numberOfMatches > 0;
}
- (void)validateInputCallback:(NSNotification *) notification
{
UITextField* atextField = (UITextField *)[notification object];
if ([self validateInputWithString:atextField.text]){
//Turns the textfield green
atextField.layer.cornerRadius=8.0f;
atextField.layer.masksToBounds=YES;
atextField.layer.borderColor=[[UIColor greenColor]CGColor];
atextField.layer.borderWidth= 1.0f;
} else {
//Turns the textfield red
atextField.layer.cornerRadius=8.0f;
atextField.layer.masksToBounds=YES;
atextField.layer.borderColor=[[UIColor redColor]CGColor];
atextField.layer.borderWidth= 1.0f;
}
}