Ios4 如何在Iphone中编辑UITextField。。？

如何在Iphone中编辑uitextfield，一旦我输入了一些东西，但我们无法从textfield编辑它。 请帮帮我

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
    if([tfieldDOB.text length] == 4)
    {
        tfieldDOB.text=[NSString stringWithFormat:@"%@/",tfieldDOB.text];
    }
    else if([tfieldDOB.text length]==7)
    {
        tfieldDOB.text=[NSString stringWithFormat:@"%@/",tfieldDOB.text];
    }
    return YES;
}

---

您必须使用UITextFieldDelegate

@interface KInitUserViewController : UIViewController <UITextFieldDelegate>

---

尝试下面的代码，它将为您工作

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

    if (textField == tfieldDOB) {

        if ([string isEqualToString:@""]) {// This codition for while taping back space on the keyboard
            return YES;
        }
        NSString *currentText = [textField.text stringByReplacingCharactersInRange:range withString:string];
        if (currentText.length == 4 || currentText.length == 7) {
            textField.text = [NSString stringWithFormat:@"%@/",currentText];
            return NO;
        }

    }
    return YES;
}

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

    if (textField == tfieldDOB) {

        if ([string isEqualToString:@""]) {// This codition for while taping back space on the keyboard
            return YES;
        }
        NSString *currentText = [textField.text stringByReplacingCharactersInRange:range withString:string];
        if (currentText.length == 4 || currentText.length == 7) {
            textField.text = [NSString stringWithFormat:@"%@/",currentText];
            return NO;
        }

    }
    return YES;
}