I have been working on CustomCell in Xamarin.iOS platform. The following code is working fine. I have tableItems which is List that stores Start and End values.
And I also have a class(SettingCustomCell) where I have programmatically created TextFields to display Start and End values.
I wonder how could I detect/capture when user changes either Start or End values in the TextField in my current implementation.
MainTableViewController
tableItems.Add (new TableItem() {Start=1000, End=4000});
tableItems.Add (new TableItem() {Start=4000, End=6000});
public override UITableViewCell GetCell (UITableView tableView, NSIndexPath indexPath)
{
SettingsCustomCell cell = tableView.DequeueReusableCell (cellIdentifier) as SettingsCustomCell;
if (cell == null) {
cell = new SettingsCustomCell (cellIdentifier);
}
cell.UpdateCell (tableItems [indexPath.Row].Start, tableItems [indexPath.Row].End);
return cell;
}
SettingsCustomCell
public CustomCell (NSString cellId) : base (UITableViewCellStyle.Default, cellId)
{
SelectionStyle = UITableViewCellSelectionStyle.None;
firstLabel = new UITextField ();
secondLabel = new UITextField ();
ContentView.Add (firstLabel);
ContentView.Add (secondLabel);
}
public void UpdateCell (int caption, int subtitle)
{
firstLabel.Text = caption.ToString();
secondLabel.Text = subtitle.ToString();
}
Create the eventhandler in the tablecell. And when the your UITextField text change call this eventhandler.
public EventHandler<bool> EditingChanged;
//some code here
firstTextField.ValueChanged += (s, e) => {
if(EditingChanged!=null)
EditingChanged(this,true);
}
Than in your DataSource you subscribe for EditingChanged event and create another eventhandler which will be called when the EditingChanged will be executed.
public EventHandler<bool> SourceEditingChanged;
public override UITableViewCell GetCell (UITableView tableView, NSIndexPath indexPath)
{
SettingsCustomCell cell = tableView.DequeueReusableCell (cellIdentifier) as SettingsCustomCell;
if (cell == null) {
cell = new SettingsCustomCell (cellIdentifier);
}
cell.UpdateCell (tableItems [indexPath.Row].Start, tableItems [indexPath.Row].End);
cell.EditingChanged += {
if(SourceEditingChanged!=null)
SourceEditingChanged(this,true);
};
return cell;
}
Subscribe for your SourceEditingChange Event from viewController.
MySource.SourceEditingChange += (s,e) =>{
//Your Code here
}
Related
I have Tableview with longpress cell.
I can't read the data inside the cell which have been long pressed.
rowselected() method is not the right way because I must select cell first. I didn't want to select cell first.
This is my table adapter class:
internal class AbsetAdapterClass : UITableViewSource
{
private List<benood2.AbsentClass> absentList;
public AbsetAdapterClass(List<benood2.AbsentClass> absentList)
{
this.absentList = absentList;
}
public override UITableViewCell GetCell(UITableView tableView, NSIndexPath indexPath)
{
var cell = (TableClass)tableView.DequeueReusableCell("cell_id", indexPath);
var AbsentDay = absentList[indexPath.Row];
var longPressGesture = new UILongPressGestureRecognizer(LongPressMethod);
cell.AddGestureRecognizer(longPressGesture);
cell.UpdateCell(AbsentDay);
return cell;
}
public override nint RowsInSection(UITableView tableview, nint section)
{
return absentList.Count;
}
public override void RowSelected(UITableView tableView, NSIndexPath indexPath)
{
PublicClass.ReadCellValue = "";
var GetCellValue = absentList[indexPath.Row].BandValue;
tableView.DeselectRow(indexPath, true);
}
void LongPressMethod(UILongPressGestureRecognizer gestureRecognizer)
{
if (gestureRecognizer.State == UIGestureRecognizerState.Began)
{
Toast.MakeToast("I want to read the cell data ").SetTitle(PublicClass.ReadCellID.ToString()).SetDuration(ToastDuration.Regular).Show();
}
}
}
I can't get the long press cell data
You could attach LongPressGesture to the UITableView instead of the UITableViewCell.
You could try the following code (Note: i made my demo based on the Xamarin.iOS official samples):
public override void ViewDidLoad ()
{
base.ViewDidLoad ();
table = new UITableView(new CGRect(0, 0, width, height));
...
// add longPressGesture to the tableView
var longPressGesture = new UILongPressGestureRecognizer(LongPressMethod);
table.AddGestureRecognizer(longPressGesture);
...
}
Then for LongPressMethod:
void LongPressMethod(UILongPressGestureRecognizer gestureRecognizer)
{
var p = gestureRecognizer.LocationInView(table);
var indexPath = table.IndexPathForRowAtPoint(p);
if (indexPath == null)
{
Console.WriteLine("Long press on table view but not on a row.");
}
else if (gestureRecognizer.State == UIGestureRecognizerState.Began)
{
Console.WriteLine("Long press on {0} row", indexPath.Row);
//you could get the selectedItem through the Row index
}
}
For more info, you could refer to Working with Tables and Cells in Xamarin.iOS.
Hope it works for you.
I have a UITableView set up with GetCell, RowsInSection, and other methods required for my UITableView. Here is my code:
using UIKit;
...
namespace ...
{
public partial class (className) : UIViewController, IUITextFieldDelegate, IUITableViewDataSource, IUITableViewDelegate
bool test = false;
public override void ViewDidLoad()
{
base.ViewDidLoad();
table.ReloadData();
table.DataSource = this;
table.Delegate = this;
test = true;
}
...
public nint RowsInSection(UITableView tableview, nint section)
{
return 2;
}
public UITableViewCell GetCell(UITableView tableView, NSIndexPath indexPath)
{
var cell = tableView.DequeueReusableCell("cell") as Cell;
bool selected = test;
cell.Setup(selected);
return cell;
}
}
What I attempt to do is checking a changed value of a variable while setting up the cell in GetCell. However, it seems that the GetCell method ignores the changed value of the variable test, so my question is how do I access the variable after the change in ViewDidLoad.
Call table.ReloadData(); after modifying test , because reloadData is used to trigger all the methods in the delegate including GetCell .
table.DataSource = this;
table.Delegate = this;
test = true;
table.ReloadData();
Your code is not for cell reuse , pls refer to the correct way here .
//register
table.RegisterClassForCellReuse (typeof(Cell), "cell");
public override UITableViewCell GetCell (UITableView tableView, NSIndexPath indexPath)
{
//cell reuse
var cell = (Cell) tableView.DequeueReusableCell ("cell", indexPath);
if (cell == null) cell = new Cell("cell");
bool selected = test;
cell.Setup(selected);
return cell;
}
I am new to iOS. I am creating TableView with swipe to delete the cell. But When I swipe every time the cell height is decrease. I am using iOS 10. The below code I have used.
Code :
class AppointmentSourceClass : UITableViewSource
{
List<AppointmentItem> appointments;
public AppointmentSourceClass(List<AppointmentItem> appointments)
{
this.appointments = appointments;
}
public override UITableViewCell GetCell(UITableView tableView, NSIndexPath indexPath)
{
ApointListCell cell = tableView.DequeueReusableCell(ApointListCell.Key) as ApointListCell ?? ApointListCell.Create();
var item = appointments[indexPath.Row];
cell.BindData(item);
cell.Layer.MasksToBounds = false;
cell.Layer.CornerRadius = 5.0f;
cell.BackgroundColor = UIColor.White;
cell.SelectionStyle = UITableViewCellSelectionStyle.None;
return cell;
}
public override void CommitEditingStyle(UITableView tableView, UITableViewCellEditingStyle editingStyle, NSIndexPath indexPath)
{
switch (editingStyle)
{
case UITableViewCellEditingStyle.Delete:
appointments.RemoveAt(indexPath.Row);
tableView.DeleteRows(new NSIndexPath[] { indexPath},UITableViewRowAnimation.Fade);
break;
case UITableViewCellEditingStyle.None:
break;
}
}
public override bool CanEditRow(UITableView tableView, NSIndexPath indexPath)
{
return true;
}
public override string TitleForDeleteConfirmation(UITableView tableView, NSIndexPath indexPath)
{
return "Trash ( ";
}
public override nint RowsInSection(UITableView tableview, nint section)
{
return appointments.Count;
}
}
}
Output :
Before Swipe Image :
After Swipe Image :
Found the solution.
In the TableCell I have use below code to seperate the two tableCell and make space between them. If i remove the code then it working fine.
public override CoreGraphics.CGRect Frame
{
get
{
return base.Frame;
}
set
{
value.Y += 4;
value.Height -= 2 * 4;
base.Frame = value;
}
}
I'm new to this, so I have troubles doing that. My goal is too put, like the title said, a button inside a cell. If you want to see my code, so that this could help you to answer this question, here is the code:
using System;
using System.Collections.Generic;
using System.Text;
using Foundation;
using UIKit;
namespace TableView
{
public class TableSource : UITableViewSource
{
string[] tableItems;
string cellIdentifier = "TableCell";
public TableSource (string[] items)
{
tableItems = items;
}
public override nint RowsInSection(UITableView tableview, nint section)
{
return tableItems.Length;
}
public override void RowSelected(UITableView tableView, NSIndexPath indexPath)
{
new UIAlertView("Alert", "You selected: " + tableItems[indexPath.Row], null, "Next Site", null).Show();
tableView.DeselectRow(indexPath, true);
}
public override UITableViewCell GetCell(UITableView tableView, NSIndexPath indexPath)
{
UITableViewCell cell = tableView.DequeueReusableCell(cellIdentifier);
if (cell == null)
cell = new UITableViewCell(UITableViewCellStyle.Subtitle, cellIdentifier);
cell.TextLabel.Text = tableItems[indexPath.Row];
if(indexPath.Row > -1)
cell.DetailTextLabel.Text = tableItems[indexPath.Row - 0];
return cell;
}
}
}
Here is the code for ViewController, if this is needed to.
Create a custom TableViewCell and add the button there. Than use that custom TableViewCell in your GetCell method.
class MyButtonTableViewCell : UITableViewCell
{
public UIButton MyButton { get; private set; }
public MyButtonTableViewCell() : base(UITableViewCellStyle.Default, "MyButtonCell")
{
MyButton = new UIButton(UIButtonType.System);
MyButton.Frame = ContentView.Bounds;
MyButton.SetTitle("My Title", UIControlState.Normal);
ContentView.AddSubview(MyButton);
}
}
public override UITableViewCell GetCell(UITableView tableView, NSIndexPath indexPath)
{
UITableViewCell cell = tableView.DequeueReusableCell("MyButtonCell");
if (cell == null)
cell = MyButtonTableViewCell();
return cell;
}
First of all you need to add a tag to the button so that you can see what button is being pressed inside the cellForRowAtIndexPath function like this:
cell.Button.tag = indexPath.row
Then inside an IBAction you can see exactly what row's button was pressed like this:
#IBAction func buttonPressed(sender: AnyObject)
{
let button = sender as! UIButton
let index = NSIndexPath(forRow: button.tag, inSection: 0)
}
I want to use UITableView on XamarinApp.
I tried UITableView example Populating a Table with Data ,but it doesn't work.
When i used this.Add(table); cause crash. When I remove this.Add(table) it's shows empty table.
Please help me...
Here is my code
using Foundation;
using System;
using System.CodeDom.Compiler;
using UIKit;
namespace KUkyuko
{
partial class MyTableViewSource : UITableView
{
public MyTableViewSource(IntPtr handle) : base (handle)
{
var table = this;
string[] tableItems = new string[] {"Vegetables","Fruits","Flower Buds","Legumes","Bulbs","Tubers"};
table.Source = new TableSource(tableItems);
this.Add(table); //this code cause crash
}
}
public class TableSource : UITableViewSource {
string[] TableItems;
string CellIdentifier = "TableCell";
public TableSource (string[] items)
{
TableItems = items;
}
public override nint RowsInSection (UITableView tableview, nint section)
{
return TableItems.Length;
}
public override UITableViewCell GetCell (UITableView tableView, NSIndexPath indexPath)
{
UITableViewCell cell = tableView.DequeueReusableCell (CellIdentifier);
string item = TableItems[indexPath.Row];
//---- if there are no cells to reuse, create a new one
if (cell == null)
{ cell = new UITableViewCell (UITableViewCellStyle.Default, CellIdentifier); }
cell.TextLabel.Text = item;
return cell;
}
}
}
Im abit unsure as to what you trying to achieve but
I would change the tableview to a tableViewController like so::
partial class TableViewController : UITableViewController
{
public TableViewController (IntPtr handle) : base (handle)
{
// Register the TableView's data source
string[] tableItems = new string[] {"Vegetables","Fruits","Flower Buds","Legumes","Bulbs","Tubers"};
this.TableView.Source = new TableSource(tableItems);
}
}
public class TableSource : UITableViewSource {
string[] TableItems;
string CellIdentifier = "TableCell";
public TableSource (string[] items)
{
TableItems = items;
}
public override nint RowsInSection (UITableView tableview, nint section)
{
return TableItems.Length;
}
public override nint NumberOfSections (UITableView tableView)
{
// TODO: return the actual number of sections
return 1;
}
public override UITableViewCell GetCell (UITableView tableView, NSIndexPath indexPath)
{
UITableViewCell cell = tableView.DequeueReusableCell (CellIdentifier);
string item = TableItems[indexPath.Row];
//---- if there are no cells to reuse, create a new one
if (cell == null)
{ cell = new UITableViewCell (UITableViewCellStyle.Default, CellIdentifier); }
cell.TextLabel.Text = item;
return cell;
}
}
If you are using the table inside a viewController then you need to do this part in your viewController and set up a outlet for the table.
The reason this code crashes as you are adding this to this:
var table = this;
string[] tableItems = new string[] {"Vegetables","Fruits","Flower Buds","Legumes","Bulbs","Tubers"};
table.Source = new TableSource(tableItems);
this.Add(table); //this code cause crash as it is the same as this.Add(this)
Hope this helps!