单击时如何在Tableview中更改UIImageView的图像

Question

I have a Table view that I fill dynamically. The code for my cellForRowAtIndexPath method is :

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

UIImage * ImageFavorited = [UIImage imageNamed:@"Favorited"];

        UIImageView *ImageViewFavorited = (UIImageView *)[cell viewWithTag:7];
        ImageViewFavorited.image =ImageFavorited;

        ImageViewFavorited.userInteractionEnabled = YES;


        NSString *uiid = [[collectionFromData valueForKey:@"id"] objectAtIndex:(indexPath.row)];
        MYTapGestureRecognizer *tapped = [[MYTapGestureRecognizer alloc] initWithTarget:self action:@selector(myFunction:)  ];
        tapped.data = uiid;
        tapped.numberOfTapsRequired = 1;
        [ImageViewFavorited addGestureRecognizer:tapped];

}

I know, I know, The MYTapGestureRecognizer is looking odd, I actually extended UITapGestureRecognizer so I can pass data with it. (Thank you StackOverFlow Users) , So my problem now is that I want to change the image of my clicked UIImageview after the user click on it. For now I detect the click in the myfunction function but I can't seem to find a way to change the image.

The code for myfunction is :

-(void)myFunction :(id) sender
{
    MYTapGestureRecognizer *tap = (MYTapGestureRecognizer *)sender;

    NSLog(@"data is  = %@", tap.data);
}

Answer 1

Add the following to the myFunction to get the sender view:

[(UIGestureRecognizer *)sender view]

Then with that you can change that views properties, since in your case it's a UIImageView, just cast it as a UIImageView and change the image property.

The completed solution would be:

[(UIImageView*) [(UIGestureRecognizer *)sender view]] setImage:[UIImage imageNamed:”blah”]] 

Answer 2

Best practice for this situation.

Instead of UIImage use UIButton and bind action in your viewController . Set the button image of default and Selected state storyboard or by code as per what you do.

In buttonAction

sender.selected = !sender.selected;
tableView.raeloadData();

Thats All. If still facing issue then let me knoe.