How to deselect a selected UITableView cell?

问题:

I am working on a project on which I have to preselect a particular cell.

I can preselect a cell using -willDisplayCell, but I can't deselect it when the user clicks on any other cell.

- (void)tableView:(UITableView*)tableView 
        willDisplayCell:(UITableViewCell*)cell
        forRowAtIndexPath:(NSIndexPath*)indexPath
{ 
    AppDelegate_iPad *appDelegte = 
      (AppDelegate_iPad *)[[UIApplication sharedApplication] delegate];

    if ([appDelegte.indexPathDelegate row] == [indexPath row])
    {
        [cell setSelected:YES];    
    } 
}

- (void)tableView:(UITableView *)tableView 
        didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

    AppDelegate_iPad *appDelegte = 
      (AppDelegate_iPad *)[[UIApplication sharedApplication] delegate];

    NSIndexPath *indexpath1 = appDelegte.indexPathDelegate;
    appDelegte.indexPathDelegate = indexPath;
    [materialTable deselectRowAtIndexPath:indexpath1 animated:NO];
}

Can you help?

回答1:

use this code

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath 
 {
    //Change the selected background view of the cell.
     [tableView deselectRowAtIndexPath:indexPath animated:YES];
 }

Swift 3.0:

override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    //Change the selected background view of the cell.
    tableView.deselectRow(at: indexPath, animated: true)
}

回答2:

Use the following method in the table view delegate's didSelectRowAtIndexpath (Or from anywhere)

[myTable deselectRowAtIndexPath:[myTable indexPathForSelectedRow] animated:YES];

回答3:

Try this:

for (NSIndexPath *indexPath in tableView.indexPathsForSelectedRows) {
    [tableView deselectRowAtIndexPath:indexPath animated:NO];
}

回答4:

Please check with the delegate method whether it is correct or not. For example;

-(void) tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath

for

-(void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath

回答5:

Swift 4:

tableView.deselectRow(at: indexPath, animated: true)

回答6:

It might be useful to make an extension in Swift for this.

Swift 4:

Swift extension (e.g. in a UITableViewExtension.swift file):

import UIKit

extension UITableView {

    func deselectSelectedRow(animated: Bool)
    {
        if let indexPathForSelectedRow = self.indexPathForSelectedRow
        {
            self.deselectRow(at: indexPathForSelectedRow, animated: animated)
        }
    }

}

Use e.g.:

override func viewWillAppear(_ animated: Bool)
{
    super.viewWillAppear(animated)

    self.tableView.deselectSelectedRow(animated: true)
}

回答7:

In addition to setting the cell as selected, you also need to inform the tableView that the cell is selected. Add a call to -tableView:selectRowAtIndexPath:animated:scrollPosition: to your willDisplayCell: method: and you will be able to deselect it as normal.

- (void)tableView:(UITableView*)tableView 
  willDisplayCell:(UITableViewCell*)cell
forRowAtIndexPath:(NSIndexPath*)indexPath
{ 
    AppDelegate_iPad *appDelegte = (AppDelegate_iPad *)[[UIApplication sharedApplication] delegate];

    if ([appDelegte.indexPathDelegate row] == [indexPath row])
    {
        // SELECT CELL
        [cell setSelected:YES]; 
        // TELL TABLEVIEW THAT ROW IS SELECTED
        [tableView selectRowAtIndexPath:indexPath animated:NO scrollPosition:UITableViewScrollPositionNone];   
    } 
}

Be sure to use UITableViewScrollPositionNone to avoid odd scrolling behavior.

回答8:

This should work:

[tableView deselectRowAtIndexPath:indexpath1 animated:NO];

Just make sure materialTable and tableView are pointing to the same object.

Is materials connected to the tableView in Interface Builder?

回答9:

Based on saikirans solution, I have written this, which helped me. On the .m file:

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

    if(selectedRowIndex && indexPath.row == selectedRowIndex.row) {

        [tableView deselectRowAtIndexPath:indexPath animated:YES];
        selectedRowIndex = nil;

    }

    else {  self.selectedRowIndex = [indexPath retain];   }

    [tableView beginUpdates];
    [tableView endUpdates];

}

And on the header file:

@property (retain, nonatomic) NSIndexPath* selectedRowIndex;

I am not very experienced either, so double check for memory leaks etc.

回答10:

If you want to select any table cell with the first click and deselect with the second, you should use this code:

- (void)tableView:(UITableView *)tableView 
        didSelectRowAtIndexPath:(NSIndexPath *)indexPath {   

    if (self.selectedIndexPath && 
        [indexPath compare:self.selectedIndexPath] == NSOrderedSame) {

        [tableView deselectRowAtIndexPath:indexPath animated:YES];
         self.selectedIndexPath = nil;
    } 
    else {
        self.selectedIndexPath = indexPath;
    }
}

回答11:

Swift 4:

func tableView(_ tableView: UITableView, willSelectRowAt indexPath: IndexPath) -> IndexPath? {
    let cell = tableView.cellForRow(at: indexPath)
    if cell?.isSelected == true { // check if cell has been previously selected
        tableView.deselectRow(at: indexPath, animated: true)
        return nil
    } else {
        return indexPath
    }
}

回答12:

Swift 2.0:

tableView.deselectRowAtIndexPath(indexPath, animated: true)

回答13:

try this

[self.tableView deselectRowAtIndexPath:[self.tableView indexPathForSelectedRow] animated:YES];

回答14:

NSIndexPath * index = [self.menuTableView indexPathForSelectedRow];
[self.menuTableView deselectRowAtIndexPath:index animated:NO];

place this code according to your code and you will get your cell deselected.

回答15:

Can you try this?

- (void)tableView:(UITableView *)tableView 
  didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

    AppDelegate_iPad *appDelegte = 
    (AppDelegate_iPad *)[[UIApplication sharedApplication] delegate];
    NSIndexPath *indexpath1 = appDelegte.indexPathDelegate;
    appDelegte.indexPathDelegate = indexPath;

    UITableViewCell *prevSelectedCell = [tableView cellForRowAtIndexPath: indexpath1];
    if([prevSelectedCell isSelected]){
       [prevSelectedCell setSelected:NO];
    }
}

It worked for me.

回答16:

Swift 3.0:

Following the protocol conformance section of the ray wenderlich swift style guide, to keep related methods grouped together, put this extension below your view controller class like that:

// your view controller
class MyViewcontroller: UIViewController {
  // class stuff here
}

// MARK: - UITableViewDelegate
extension MyViewcontroller: UITableViewDelegate {
      // use the UITableViewDelegate method tableView(_:didSelectRowAt:)
    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {

        // your code when user select row at indexPath

        // at the end use deselectRow
        tableView.deselectRow(at: indexPath, animated: true)
    }
}

回答17:

This is a solution for Swift 4

 in tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath)

just add

tableView.deselectRow(at: indexPath, animated: true)

it works like a charm

example:

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        tableView.deselectRow(at: indexPath, animated: true)
//some code
}

回答18:

Swift

func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {

    // your code

    // your code

    // and use deselect row to end line of this function

    self.tableView.deselectRowAtIndexPath(indexPath, animated: true)

}

回答19:

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    tableView.deselectRow(at: indexPath, animated: true)
}

回答20:

Swift 3

I've run into this as well - when you navigate or unwind back to the table view it usually doesn't deselect the previously selected row for you. I put this code in the table view controller & it works well:

override func viewDidAppear(_ animated: Bool) {
    if let lastSelectedRow = tableView.indexPathForSelectedRow {
        tableView.deselectRow(at: lastSelectedRow, animated: true)
    }
}

回答21:

Swift 3/4

In ViewController:

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    tableView.deselectRow(at: indexPath, animated: true)
}

In Custom Cell:

override func awakeFromNib() {
    super.awakeFromNib()
    selectionStyle = .none
}

回答22:

swift 3.0

    tableView.deselectRow(at: indexPath, animated: true)

回答23:

To have deselect (DidDeselectRowAt) fire when clicked the first time because of preloaded data; you need inform the tableView that the row is already selected to begin with, so that an initial click then deselects the row:

//Swift 3:

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

    if tableView[indexPath.row] == "data value"

        tableView.selectRow(at: indexPath, animated: false, scrollPosition: UITableViewScrollPosition.none)

    }
}