獲取UITableViewCell中UITextField的值方法總結

UITableViewCell的contentView中的UITextField的值獲取有幾種方法，本人簡單總結一下。

1.  獲取UITextField所以Cell的NSIndexPath,知道了NSIndexPath就知道了這個UITextField是幹什麼的了。

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是哪一個資料結構的值，前一個是實時的，後一個是失去焦點時一次性的。

2。第二種方法與上面第一個有點類似也是實時的，來自：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;

//此方法為關鍵方法
    [theTextField addTarget:self action:@selector(textFieldWithText:) forControlEvents:UIControlEventEditingChanged];
    
    switch (row) {
        case 0:
            theTextField.placeholder = @"請輸入舊密碼";
            break;
        case 1:
            theTextField.placeholder = @"請輸入新密碼";
            break;
        case 2:
            theTextField.placeholder = @"請再次輸入新密碼";
            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;
    }
}