获取UITableViewCell中UITextField的值方法总结

UITableViewCell的contentView中的UITextField的值获取有几种方法，本人简单总结一下。

1.  获取UITextField所以Cell的NSIndexPath,知道了NSIndexPath就知道了这个UITextField是干什么的了。

可以在

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string  
{  
//get cell  
UITableViewCell *cell = [UITableViewCell ][[textField superview] superview];  
NSIndexPath *indexPath = [tableView indexPathForCell:cell];  
}

或

- (void)textFieldDidEndEditing:(UITextField *)textField  
{  
    //get cell  
    UITableViewCell *cell  = (UITableViewCell *)[[textField superview] superview];  
    NSIndexPath *indexPath = [tableView indexPathForCell:cell];  
}  

中得知道UITextField中text是哪一个数据结构的值，前一个是实时的，后一个是失去焦点时一次性的。

2。第二种方法与上面第一个有点类似也是实时的，来自：http://blog.sina.com.cn/s/blog_9ca91e4a0100xlvu.html

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath  
{  
    NSInteger row = [indexPath row];  
      
    static NSString  *CellIdentifier = @"CellIdentifier";  
      
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];  
      
    if (cell == nil) {  
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];  
        cell.selectionStyle = UITableViewCellSelectionStyleNone;  
    }  
      
    cell.textLabel.text = [_passwordArray objectAtIndex:row];  
      
    CGRect textFieldRect = CGRectMake(0.0, 0.0f, 215.0f, 31.0f);  
    UITextField *theTextField = [[UITextField alloc] initWithFrame:textFieldRect];  
    theTextField.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;  
    theTextField.returnKeyType = UIReturnKeyDone;  
    theTextField.secureTextEntry = YES;  
    theTextField.clearButtonMode = YES;  
    theTextField.tag = row;  
    theTextField.delegate = self;  
  
//此方法为关键方法  
    [theTextField addTarget:self action:@selector(textFieldWithText:) forControlEvents:UIControlEventEditingChanged];  
      
    switch (row) {  
        case 0:  
            theTextField.placeholder = @"请输入旧密码";  
            break;  
        case 1:  
            theTextField.placeholder = @"请输入新密码";  
            break;  
        case 2:  
            theTextField.placeholder = @"请再次输入新密码";  
            break;  
        default:  
            break;  
    }  
      
    cell.accessoryView = theTextField;   
    [theTextField release];  
      
    return cell;  
}  
  
- (void)textFieldWithText:(UITextField *)textField  
{  
    switch (textField.tag) {  
        case 0:  
            self.theOldPassword = textField.text;  
            break;  
        case 1:  
            self.theNewPassword = textField.text;  
            break;  
        case 2:  
            self.theTwiceNewPassword = textField.text;  
            break;  
        default:  
            break;  
    }  
}  

转自 http://blog.csdn.net/favormm/article/details/7380160