When I create a collection view with a custom cell (the collection view has 10 elements) by using dequeueReusableCellWithReuseIdentifier and then call reloadItemsAtIndexPaths to upload cell on button click, I get null for properties which were set to CustomCollectionViewCell inside the cellForItemAtIndexPath method.
I tried debugging and I found that the initWithFrame method of the custom cell is called the first time the app is run, and then a second time when the button is clicked for the first time.
Each time I press the button (after the first button press), the method initWithFrame of the custom cell is not called.
Can someone help me?
I want those properties to be stored, and not reset the first time the button is pressed.
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I have tableVC, it contains from cells with customViews.
That customViews contains from 3 imageViews, so then I click on imageView, it makes some action. To achieve it I added UITapGestureRecognizers to imageView.
Now I need to be notified then this cells are tapped in my tableVC. I get this events in didSelectRowAtIndexPath, but only if I do not touch any of imageViews with gestures.
How can I receive tap notification in my tableVC about touching my cell completely ?
If you want to get cell that is tapped - didSelectRowAtIndexPath is way to go. If you want to get the tapped image inside that cell - implement delegate for that ( https://developer.apple.com/library/ios/documentation/General/Conceptual/CocoaEncyclopedia/DelegatesandDataSources/DelegatesandDataSources.html ) and do the corresponding actions. I see that you mentioned didSelectRowAtIndexPath, but I am not sure what was your problem.
Also I didn't put any code since I don't know if you are using swift or objective-c.
Setup: i have a view controller with a tableview inside it. I also have a button in the view controller. What I want to do is when I click the button, it should change the detail label text. What i having going now is my button action, and then my cellForRowAtIndexPath. Essentially i need to tell me cell that when my button is click to change the detail text with whatever information i want. I'm stuck with this...I can assign the button to change any label...but i can't figure out how to change the detail label with the button click. Any help would be great.
You typically set the content of a uitableviewcell (which includes textLabel.text and detailTextLabel.text) in cellForRowAtIndexPath method using a datasource. This datasource could be any model object derived by NSObject or it could be NSDictionary. When you process the button tap in button's action method, just update your datasource object for the row/section with the desired detailTextLabel text and call [tableView reloadData] to reload your tableview.
I have several UITableViews which should segue further in my navigation controller. First I've created the segues directly from the table view cells. But then I've noticed that in the smaller cells if you click on the label or somewhere, this method didSelectRowAtIndexPath doesn't get triggered. Only if you click on an "empty" space in the cell.
So I've created the segue for the whole view and just called performSegueWithIdentifier in the didSelectRowAtIndexPath method.
But still the same problem. Is this only my impression that you have to click on empty parts or onto the right side of a cell to perform a segue or is something else wrong? Or how could I make the whole cell reactive?
You might try turning off User interaction enabled for the labels in your cell.
I have a custom CollectionViewCell class, I have then generated an amount of these inside of a CollectionView. I have then also added a modal segue when the ViewCells are touched. How would I get the id (or index path) of which cell was pressed when the modal segue is activated.
I saw on here that someone suggested I add into the ViewCell.m file the method
-(void)collectionView: (UICollectionView*)collectionView didSelectItemAtIndexPath: (NSIndexPath*)indexPath{
//get indexpath variable in here
}
But this method does not seem to be getting called. Can anyone help me with what method would need to be get called for when a CollectionViewCell has a modal segue to get the indexpath.
Thanks,
If the views you have added to your cells are handling the touch by firing a segue, then the collectionViewCell never has a chance to receive the touch.
If you want the collectionViewCell to handle it, make the subviews of your cell purely decorative by disabling their behavior to fire the segue. (for example, if they are buttons and "touchUpInside" fires the segue, then change them into views with no touch handling at all.).
Then the touch will be passed up through the view hierarchy until the CollectionViewCell handles it, which it does with the collectionView:didSelectItemAtIndexPath: method.
The method is a callback of the delegate class of the collection view object:
-(void)collectionView: (UICollectionView*)collectionView didSelectItemAtIndexPath: (NSIndexPath*)indexPath
So you should implement on the .m file of the delegate class of you collection view.
I've got a UITableView which pushes a detail view when I tap any of its cells. I'd like that segue to only occur when tapping a specific part of the cell, a UIImageView at its left side. Tapping the rest of the cell should trigger a UITapGestureRecognizer which triggers a different method.
How can I override the default tap on the UITableViewCell, so that simply tapping anywhere on the cell doesn't trigger the segue to the detail view? I still want that transition, just only triggered by the UIImageView.
I think you could achieve that by connecting the segue with the image in the prototype cell (Never tried that myself) and not with the table view.
If you don't have a prototype cell then you should programmatically invoke an IBAction type of method with the image views. Well, Image Views cannot do that. Simply abuse a UIButton of the same size, custom style and assign the image to that button. Works fine.
(It does not need to be an -(IBAction) type of method, but it does not harm and doing so ensures that everything works fine.)
Within that action method invoke the segue programmatically. The segue needs to have an ID for that which is unique within the storyboard.