textFeild textView 输入无效字符

- (BOOL)textField:(UITextField*)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString*)string

{

    if ([[[textField textInputMode] primaryLanguage] isEqualToString:@"emoji"] || ![[textField textInputMode] primaryLanguage]) {

        return NO;//此处是限制emoji表情输入

    }

    return YES;

}

-(BOOL)textView:(UITextView*)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString*)text

{

    if ([[[textView textInputMode] primaryLanguage] isEqualToString:@"emoji"] || ![[textView textInputMode] primaryLanguage]) {

        return NO;//此处是限制emoji表情输入

    }

    return YES;

}

只输入字母

- (BOOL)textField:(UITextField*)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString*)string

{

     return[selfvalidateNumber:string];

}

- (BOOL)validateNumber:(NSString*)number {

    BOOLres =YES;

    NSCharacterSet* tmpSet = [NSCharacterSet characterSetWithCharactersInString:@"0123456789"];

    inti = 0;

    while(i < number.length) {

        NSString * string = [number substringWithRange:NSMakeRange(i, 1)];

        NSRangerange = [stringrangeOfCharacterFromSet:tmpSet];

        if(range.length== 0) {

            res =NO;

            break;

        }

        i++;

    }

    returnres;

}