iOS UITextField如何禁止输入表情及特殊字符
---恢复内容开始---
//禁止输入表情
- (NSString *)disable_emoji:(NSString *)text
{
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"[^\\u0020-\\u007E\\u00A0-\\u00BE\\u2E80-\\uA4CF\\uF900-\\uFAFF\\uFE30-\\uFE4F\\uFF00-\\uFFEF\\u0080-\\u009F\\u2000-\\u201f\r\n]" options:NSRegularExpressionCaseInsensitive error:nil];
NSString *modifiedString = [regex stringByReplacingMatchesInString:text
options:0
range:NSMakeRange(0, [text length])
withTemplate:@"&&&&****"];
return modifiedString;
}
//使用方式
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
if ([[self disable_emoji:string] isEqualToString:@"&&&&****"] || [[self disable_emoji:string] isEqualToString:@"&&&&****&&&&****"]) {
[textField becomeFirstResponder];
[FZPPregressHUD showNormalWithStatus:@"禁止输入特殊字符"];
return NO;
}
}
//禁止输入特殊字符
//首先需要先将特殊字符存放在数组内
self.specialStringArray = [@[] mutableCopy];
//字符串
self.specialStringStr = @"~,￥,#,&,*,<,>,《,》,(,),[,],{,},【,】,^,@,/,￡,¤,,|,§,¨,「,」,『,』,￠,￢,￣,（,）,——,+,|,$,_,€,¥,？,/,|,，,。,!,！";
self.specialStringArray = [self.specialStringStr componentsSeparatedByString:@","];
//然后还是在代理方法中实现
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
循环遍历字符串
for (NSInteger i = 0; i < self.specialStringArray.count; i++) {
//判断字符串中是否含有特殊符号
if ([intriduction rangeOfString:self.specialStringArray[i]].location != NSNotFound) {
[textField becomeFirstResponder];
[FZPPregressHUD showNormalWithStatus:@"禁止输入特殊字符"];
textField.text = [textField.text substringToIndex:textField.text.length - 1];
return NO;
}
//逗号需要特殊处理一下
if ([intriduction rangeOfString:@","].location != NSNotFound) {
[textField becomeFirstResponder];
[FZPPregressHUD showNormalWithStatus:@"禁止输入特殊字符"];
textField.text = [textField.text substringToIndex:textField.text.length - 1];
return NO;
}
}
}
