iPhone以编程方式从文本字段读取

Question

我创建了一些表格，里面有文本字段，就像 iPhone 的联系人一样， （受到 UICatalog 示例的启发）

一切都正常，但是我如何以编程方式读取此文本字段的值，我看到它们有一个标签，但我如何从中读取它们（因为在创建它们时我无法使用 IB以编程方式进入表格）（这里是菜鸟！）

谢谢，

我使用一些示例 hello world 样式，我在表格的文本字段上键入，然后单击按钮，键入的文本将转到标签， 此示例最终是从表文本字段填充我的 coredata 数据库 正如我所说，我对此很菜鸟，所以请引导我完成

，以便当用户点击“提交”时，我将文本发送到标签（很快就会发送到 coredata），

 - (IBAction) submitYourName;{
lblUserTypedName.text = txtUserName.text;
NSLog(@"received");
 }

这是我的文本字段的代码

- (UITextField *)textFieldNormal
 {
if (textFieldNormal == nil)
{
    CGRect frame = CGRectMake(kLeftMargin, 8.0, kTextFieldWidth, kTextFieldHeight);
    textFieldNormal = [[UITextField alloc] initWithFrame:frame];

    textFieldNormal.borderStyle = UITextBorderStyleRoundedRect;
    textFieldNormal.textColor = [UIColor blackColor];
    textFieldNormal.font = [UIFont systemFontOfSize:17.0];
    textFieldNormal.placeholder = @"<enter text>";
    textFieldNormal.backgroundColor = [UIColor whiteColor];
    textFieldNormal.autocorrectionType = UITextAutocorrectionTypeNo;    // no auto correction support

    textFieldNormal.keyboardType = UIKeyboardTypeDefault;   // use the default type input method (entire keyboard)
    textFieldNormal.returnKeyType = UIReturnKeyDone;

    textFieldNormal.clearButtonMode = UITextFieldViewModeWhileEditing;  // has a clear 'x' button to the right

    textFieldNormal.tag = kViewTag;     // tag this control so we can remove it later for recycled cells

    textFieldNormal.delegate = self;    // let us be the delegate so we know when the keyboard's "Done" button is pressed

    // Add an accessibility label that describes what the text field is for.
    [textFieldNormal setAccessibilityLabel:NSLocalizedString(@"NormalTextField", @"")];



}   
return textFieldNormal;
   }

，这用于显示表格单元格中的文本字段

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
    {
UITableViewCell *cell = nil;

    static NSString *kCellTextField_ID = @"CellTextField_ID";
    cell = [tableView dequeueReusableCellWithIdentifier:kCellTextField_ID];
    if (cell == nil)
    {
        // a new cell needs to be created
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault
                                       reuseIdentifier:kCellTextField_ID] autorelease];
        cell.selectionStyle = UITableViewCellSelectionStyleNone;
    }
    else
    {
        // a cell is being recycled, remove the old edit field (if it contains one of our tagged edit fields)
        UIView *viewToCheck = nil;
        viewToCheck = [cell.contentView viewWithTag:kViewTag];
        if (viewToCheck)
            [viewToCheck removeFromSuperview];
    }

    UITextField *textField = [[self.dataSourceArray objectAtIndex: indexPath.section] valueForKey:kViewKey];
    [cell.contentView addSubview:textField];



return cell;
}

Answer 1

@Mako 从这里寻求帮助
这里 appDelegate 是您的 Application Delegate 类的对象

// 自定义表视图单元格的外观。

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [self.fieldTable dequeueReusableCellWithIdentifier:CellIdentifier];

         if (cell == nil) {

cell = [self reuseTableViewCellWithIdentifier:CellIdentifier withIndexPath:indexPath];
             }

    // Configure the cell.

        UITextField *txtTemp = (UITextField *)[cell.contentView viewWithTag:1];
    UITextField *txtTemp1 = (UITextField *)[cell.contentView viewWithTag:2];
    UITextField *txtTemp2 = (UITextField *)[cell.contentView viewWithTag:3];
    UITextField *txtTemp3 = (UITextField *)[cell.contentView viewWithTag:4];



                switch (indexPath.section) {
                case 0:
                        switch (indexPath.row) {
                            case 0:

                                txtTemp1.placeholder = @"H/No";
                                appDelegate.HouseNo = [NSString stringWithFormat:@"%@",txtTemp1.text];
                                NSLog(@"%@",appDelegate.HouseNo);
                                break;
                                case 1:
                                txtTemp1.placeholder = @"Street";
                                appDelegate.street = [NSString stringWithFormat:@"%@",txtTemp1.text];
                                NSLog(@"%@", appDelegate.street);
                                break;
                                case 2:
                                txtTemp.placeholder = @"City";
                                txtTemp2.placeholder = @"State";
                                txtTemp3.placeholder = @"Zip Code";
                                appDelegate.city = [NSString stringWithFormat:@"%@",txtTemp.text];
                                NSLog(@"%@",appDelegate.city);
                                appDelegate.state = [NSString stringWithFormat:@"%@",txtTemp2.text];
                                NSLog(@"%@",appDelegate.state);
                                appDelegate.zipCode = [NSString stringWithFormat:@"%@",txtTemp3.text];
                                NSLog(@"%@",appDelegate.zipCode);
                                break;
                                default:
                                break;


                                }
                                break;


    -(UITableViewCell *)reuseTableViewCellWithIdentifier:(NSString *)identifier withIndexPath:(NSIndexPath *)indexPath {


        CGRect cellRectangle = CGRectMake (0, 10, 300, 70); 
        CGRect Field1Frame = CGRectMake (10, 10, 290, 70);
        CGRect Field2Frame = CGRectMake (10, 10, 90, 70);
        CGRect Field3Frame = CGRectMake (110, 10, 95, 70);
        CGRect Field4Frame = CGRectMake (220, 10, 85, 70);
        UITableViewCell *cell = [[[UITableViewCell alloc] initWithFrame:cellRectangle reuseIdentifier:identifier] autorelease];
        UITextField *textField;
        UITextField *textField1;
        UITextField *textField2;
        UITextField *textField3;

        //Initialize Label with tag 1.

        textField = [[UITextField alloc] initWithFrame:Field2Frame];
        textField.tag = 1;
        [cell.contentView addSubview:textField];



        //Initialize Label with tag 2.

        textField1 = [[UITextField alloc] initWithFrame:Field1Frame];
        textField1.tag = 2;
        [cell.contentView addSubview:textField1];

        //Initialize Label with tag 3.

        textField2 = [[UITextField alloc] initWithFrame:Field3Frame];
        textField2.tag = 3;
        [cell.contentView addSubview:textField2];


        //Initialize Label with tag 4.

        textField3 = [[UITextField alloc] initWithFrame:Field4Frame];
        textField3.keyboardType = UIKeyboardTypeNumberPad;
        textField3.tag = 4;
        [cell.contentView addSubview:textField3];




        [textField release];
        [textField1 release];
        [textField2 release];
        [textField3 release];
        return cell;
    }

希望您理解...祝您好运！

Answer 2

UITextField *textField = (UITextField *)[self.view viewWithTag:100];

根据您的设置，您可能需要将 self.view 替换为您的表格。

Answer 3

创建文本字段时，将对它们的引用存储在实例变量中，例如：

UITextField *textField = ...
self.myTextField = textField;
[theSuperview addSubview:self.myTextField];

然后访问实例上的文本属性

NSString *theString = self.myTextField.text;