修复文本字段中的最大字符限制

Question

如何在Cocos2d中对文本字段强加固定字符限制？

Answer 1

要修复UITextField中的最大字符数,您可以实现UITextField Delegate方法textField:shouldChangeCharactersInRange,如果用户尝试编辑超过固定长度的字符串,则返回false.

//Assume myTextField is a UITextField
myTextField.delegate = self;

//implement this UITextFiledDelegate Protocol method in the same class
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
    if ([textField.text length] > kMaxTextFieldStringLength)
        return NO;
    else
        return YES; 
}