无法在 UITableview 中的单元格内单击 UIButton

Question

searched already some possible fixes but all did not solve mine.

i keep clicking the cell in the uitableview rather than the buttons inside it.

here is my code:

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

    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
    }

    cell.backgroundColor = [UIColor blackColor];

    UIView *v  = nil;
    NSArray *array = [cell subviews];

    for (v in array) {
        NSLog(@"%@",[v class]);
        if( [v isKindOfClass:[UIView class]] ){
           [v removeFromSuperview];
        }
    }

    //tb
    if (tableView == self.tb) {

        v = [[UIView alloc] initWithFrame: CGRectMake(0, 0, self.tb.bounds.size.width, 120.0)];

        if([feeds count]>0){
            UIImageView *box=[[UIImageView alloc] initWithImage:[UIImage imageNamed:@"statusBox.png"]];

            box.userInteractionEnabled = YES;
            [v addSubview:box];

            AsyncImageView *imageView1 = [[AsyncImageView alloc] initWithFrame:CGRectMake(10, 20.0f, 34.0f, 34.0f)];
            imageView1.contentMode = UIViewContentModeScaleAspectFill;
            imageView1.clipsToBounds = YES;

            //cancel loading previous image for cell
            [[AsyncImageLoader sharedLoader] cancelLoadingImagesForTarget:imageView1];
            if (users1 != nil && users1.imagelink != nil && (id) users1.imagelink !=   [NSNull null]){
               imageView1.imageURL = [NSURL URLWithString:users1.imagelink];
            }
            else{
                imageView1.image=[UIImage imageNamed:@"default_ProfilePic.png"];
            }

            UITapGestureRecognizer *tapped = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(myFunction:)];
            tapped.numberOfTapsRequired = 1;
            [imageView1 addGestureRecognizer:tapped];
            [tapped release];

            imageView1.userInteractionEnabled = NO;
            [v addSubview:imageView1];


            UIFont *font     = [UIFont fontWithName:@"TrebuchetMS-Bold" size:11];
            UILabel *descLabel1 = [[UILabel alloc] initWithFrame: CGRectMake(52, 23, 160, 48)];
            descLabel1.text                 = [NSString stringWithFormat:@"%@ %@",users1.userfirstn,users1.userlastn];
            descLabel1.textColor            = [UIColor blackColor];
            descLabel1.font                 = font;
            descLabel1.adjustsFontSizeToFitWidth=YES;
            descLabel1.numberOfLines = 0;
            CGSize expectedLabelSize = [descLabel1.text sizeWithFont:descLabel1.font
                                               constrainedToSize:descLabel1.frame.size
                                                   lineBreakMode:UILineBreakModeWordWrap];

            CGRect newFrame = descLabel1.frame;
            newFrame.size.height = expectedLabelSize.height;
            descLabel1.frame = newFrame;
            descLabel1.numberOfLines = 0;

            descLabel1.userInteractionEnabled = NO;
            [v addSubview:descLabel1];


            UILabel *descLabel2= [[UILabel alloc] initWithFrame: CGRectMake(52, 43, 200, 48)];
            StatusClass *stat1=[feeds objectAtIndex:indexPath.row];
            descLabel2.text                 = [stat1 statcreate];
            descLabel2.textColor            = [UIColor blackColor];
            descLabel2.font                 = font;
            descLabel2.adjustsFontSizeToFitWidth=YES;
            descLabel2.numberOfLines = 0;
            CGSize expectedLabelSize2 = [descLabel2.text sizeWithFont:descLabel2.font
                                                constrainedToSize:descLabel2.frame.size
                                                    lineBreakMode:UILineBreakModeWordWrap];

            CGRect newFrame2 = descLabel2.frame;
            newFrame2.size.height = expectedLabelSize2.height;
            descLabel2.frame = newFrame2;
            descLabel2.numberOfLines = 0;

            descLabel2.userInteractionEnabled = NO;
            [v addSubview:descLabel2];

            UILabel *descLabel3= [[UILabel alloc] initWithFrame: CGRectMake(10, 63, 280, 80)];
            StatusClass *stat=[feeds objectAtIndex:indexPath.row];
            descLabel3.text                 = [stat stattext];
            descLabel3.textColor            = [UIColor blackColor];
            descLabel3.font                 = font;
            descLabel3.adjustsFontSizeToFitWidth=YES;
            descLabel3.numberOfLines = 0;

            descLabel3.userInteractionEnabled = NO;
            [v addSubview:descLabel3];

            //comment button
            UIButton *buttonC = [UIButton buttonWithType:UIButtonTypeRoundedRect];
            [buttonC addTarget:self action:@selector(sendComment:) forControlEvents:UIControlEventTouchUpInside];
            [buttonC setImage:[UIImage imageNamed:@"comment.png"] forState:UIControlStateNormal];
            buttonC.frame = CGRectMake(2, 160, 145, 35);

            buttonC.userInteractionEnabled = YES;
            [v addSubview:buttonC];

            //share button
            UIButton *buttonS = [UIButton buttonWithType:UIButtonTypeRoundedRect];
            buttonS.tag = indexPath.row;
            [buttonS addTarget:self action:@selector(sendShare:) forControlEvents:UIControlEventTouchUpInside];
            [buttonS setImage:[UIImage imageNamed:@"share.png"] forState:UIControlStateNormal];
            buttonS.frame = CGRectMake(150, 160, 140, 35);

            buttonS.userInteractionEnabled = YES;
            [v addSubview:buttonS];

        }
        v.userInteractionEnabled = YES;
        [cell addSubview:v];
    }
    return cell; 
}

I also tried the UITapGestureRecognizer for the buttons and still not working.

Thanks.

Answer 1

I'm just baffled by this issue....

I managed to fix this problem by doing this on one project:

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCellWithIdentifier("RegCell", forIndexPath: indexPath) as! CustomCell

    cell.contentView.userInteractionEnabled = false // <<-- the solution

    return cell
}

but the same did not work for a different project. I have no idea why...

Answer 2

There is another potential cause of problems like this one, and that is UITableViewCells now have a contentView . This can and will be placed in front of other views in your custom table view cells in order to pick up touches and detect cell selection. In doing so, it may block touches to any views behind it. I've especially noticed this annoyance when creating cells using nibs.

The accepted means for dealing with this is to ensure that all subviews are added not to the tableview cell itself, but to its contentView . This is a read-only property that adjusts its own frame under certain circumstances, for example when slid sideways to reveal the delete button, or during editing mode. You should therefore ensure that any items you do add to the contentView are intelligently sized and have the correct resizing behaviour.

Also be aware that by adding cells to the contentView , you may yourself block touches to it and thus prevent the cell from being selected. I personally try not to allow cell selection in tableviews containing cells with custom user-enabled controls. It only leads to confusion and awkward interfaces. In fact, I'm seriously considering replacing all UITableViews in my future projects with UICollectionViews , which are far more adaptable.

-Ash

Answer 3

I was doing this:

let plusButton: UIButton = {
    let v = UIButton()
    v.setImage(plusImg, for: .normal)
    v.tintColor = .dark
    v.translatesAutoresizingMaskIntoConstraints = false


    // adding targets here did not work
    v.addTarget(self, action: #selector(plusButtonHandler), for: .touchUpInside)


    return v
}()

And it appears invoking the addTarget method inside of the closure did not work.

When I factored the addTarget method out and instead put it in the initializer, everything worked!

Answer 4

In my case I tried to added the UIButton direct to the cell by self.addSubview(myButton) , so I changed to self.contentView.addSubview(myButton) and it worked

It seems the contentView was in front of the myButton so the button won't receive the tap gesture.

Answer 5

您的UIButton ='sy 偏移量被指定为 160，而UIView's高度仅被指定为 120。请更改UIButton's y 偏移量并尝试。

Answer 6

The UITableViewCell is handling all the gestures by default. Set cell.selectionStyle = UITableViewCellSelectionStyleNone; to make it disable the default behaviour.

Answer 7

For Swift 3 and Storyboard

For me, I had to enable multiple touch inside the content view, and enable user interaction on everything - the table view, table view cell, content view, and UIButton. I was using storyboard.

I also set up my tableview cell as a subclass.

Since I couldn't find an answer here when I was exploring the problem, I posted another question on stack overflow about this. You can see my code and download a project with this working here: Can't click button inside UITableViewCell?

Answer 8

我遇到了这个问题，但在我的情况下，它与表视图无关，而是因为我在我的按钮中使用了userInteractionEnabled为 true 的子视图，为所有按钮的子视图设置该值为 false (NO)我的问题。

Answer 9

I have the same issue, and somehow I figured out my mistake.
After I changed the constraints with self(UITableViewCell) to constraints with contentView of self(UITableViewCell) ,my cell's button is clickable again.

Answer 10

Update swift 4.2

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

add it : cell.buttonCheckBox.isUserInteractionEnabled = false

OR, uncheck User Interaction Enabled inspector

Now you can select the button as well as a cell. This works for me :)

Answer 11

Create a custom UITableViewCell. Refer this link .

Say you have a UIButton by the name of displayButton, you can do something like this:

Inside your - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath , after you create your cell,

[cell.dislayButton addTarget: self
                             action: @selector(replyButtonPressed:withEvent:)
                   forControlEvents: UIControlEventTouchUpInside];

And the create the method like so in your ViewController:

- (void) replyButtonPressed: (id) sender withEvent: (UIEvent *) event
{
    UITouch * touch = [[event allTouches] anyObject];
    CGPoint location = [touch locationInView: self.tableView];
    NSIndexPath * indexPath = [self.tableView indexPathForRowAtPoint: location];
}

Answer 12

If you have no alternative selector for the UIButton pressed inside some UITableViewCell you need turn off userInteractionEnabled for the button

cellButton.userInteractionEnabled = false

In this case any button touch will propagate to the cell touch.

Answer 13

try this

public override void SetSelected(bool selected, bool animated)
    {
       // this.interestsButton.Selected = true;
        if (selected)
        {
            //  this.TextLabel.TextColor = UIColor.Red;

            //this.interestsButton.ShowsTouchWhenHighlighted = true;
            this.interestsButton.BackgroundColor = UIColor.Purple;
            //this.interestsButton.SetTitleColor(UIColor.Red, UIControlState.Highlighted);
        }
        else
        {

        }


       // cell.ContentView.UserInteractionEnabled = false;
        base.SetSelected(selected, animated);


    }

Tested on "Mvvmcross.iOS" only

Answer 14

Just to add to the discussion:

FOR SWIFT 5+

Is important to set the variable as lazy var when invoking the addTarget method inside of the closure. See:

lazy var plusButton: UIButton = {
    let v = UIButton()
    v.setImage(plusImg, for: .normal)
    v.tintColor = .dark
    v.translatesAutoresizingMaskIntoConstraints = false
    v.addTarget(self, action: #selector(plusButtonHandler), for: .touchUpInside)
    return v 
}() 

Now, about the contentView of the tableViewCells that appears above the cell stoping the click at the cell: I used the code above and also set the contentView to .ishidden = true and it worked!

Probably there is something linked to the lifecycle of the methods.

Hope it helps too.