I was building a app on iOS, and in a collectionView I have a header, and needs create event "touch up inside" for this header, like i 've create in the others cells of the collectioView
-(void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
Thx a lot, I hope u help me
It's very easy..
I'm create a simple button and edit in tag attributes -> type -> custom... the button now it's transparent and add a function in event touch up inside.. :D
Related
I search didSelectRowAtIndexPath this key word
And found most problem is how to trigger it
But my question is how to enable it with another conditions
You can check my last question here - How to add a radio button in tableview
how To disable this void when the radio button is not selected ???
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {}
I'm a bit confused by your question, but from what I can tell, you want to prevent a tableView row from being selected under certain conditions? For that you'll want to use tableView:willSelectRowAtIndexPath:. If you return nil from that method the tableView will not select a row. You may find it helpful to read the documentation for UITableViewDelegate.
Well I guess you need to run the code within the method conditionally. If your radiobutton is enabled, just run it, if not, return nil (or the other way round). You cannot prevent the method from being called at all, however.
according to your radio button state set the cell property
cell.userInteractionEnabled = NO;
I write an App that shows all it's information in a UITableView.
Now I use the UIViewController to show 2 UITableViews inside of it.
The first UITableView shows the primary information ( this works fine ).
But now I want to show an advertisement in my App.
I decided to use a second UITableViewController with just one UITableViewCell, which isn't scrollable. ( this second UITableViewController is shown and useable )
The very big question for me is how can I show advertisements there?
I like to show something like a video which I could make with Adobe CS4.
The phone doesn't like Flash, so which format could I use and how can I play it in an UITableViewCell?
Or, when it's better to show it in an UIView or something else, let me know.
Greetz
Wissensdurst
There's an inbuilt ad banner class, and they're also launching a video ad service early next year. Or you could override UITableViewCell to include a video player in it which could play your ad.
Why do you want to use a second TableView Controller? Just us the same and check for the indexPath.row or indexPath.section in you UITableView Delegate Methods. For instance:
- (UITableViewCell *)tableView:(UITableView *)tv cellForRowAtIndexPath:(NSIndexPath *)indexPath {
if (indexPath.row == 0) {
//show specific informations
}else if(indexPath.row > 0){
//show comercial
}else{
//show all other rows
}
}
or another thing you can use are the tableHeaderView or the tableFooterView. Those views are imageViews so you just can do e.g.
self.tableView.tableFooterView = (UIImageView*)myImageViewWithCommercialBanner;
For you videos, flash is definitely a no go on iphone. Use the required formats in the Apple Documentations and you are fine. For example *.m4v is a commonly used format for this.
I would like to select a cell in a tableview, except with code before any user interaction.
Is this at all possible, a quick search through the sdk notes doesnt yield anything. Where should I look?
Regards
UITableView class, "Managing Selections" section.
- (void)selectRowAtIndexPath:(NSIndexPath *)indexPath animated:(BOOL)animated scrollPosition:(UITableViewScrollPosition)scrollPosition
For my iPhone app, I have an editable (for delete) table view. I'd like to be able to detect that the user has clicked the "Edit" button. See this image: http://grab.by/It0
From the docs, it looked like if I implemented :
- (void)tableView:(UITableView *)tableView willBeginEditingRowAtIndexPath:(NSIndexPath *)indexPath
then I could detect it (although from the name of the method, I wouldn't think that). This proved not to work.
Any ideas on detecting this? The reason I want to is I want to hook up a "Delete all" button in the upper left hand corner when in delete mode.
thanks
It is probably not working as you expect because willBeginEditingRowAtIndexPath: is called before the editing starts.
If you want to check while in another method you need the editing property:
#property(nonatomic, getter=isEditing) BOOL editing
If you want to do something when the 'Edit' button is pressed you need to implement the setEditing method:
- (void)setEditing:(BOOL)editing animated:(BOOL)animated
Which you'll find in UIViewController. (Well, that's the most likely place; there are others.)
Swift
Use below code accordingly:
open var isEditing: Bool // default is NO. setting is not animated.
open func setEditing(_ editing: Bool, animated: Bool)
When subclassing a tableviewcontroller (what most people are going to be doing most of the time since you have to override it's delegate methods just to put data into it...) you can just override the setEditing:animated: method to grab editing state changes.
- (void)setEditing:(BOOL)editing animated:(BOOL)animated {
NSLog(#"Editing %i", editing);
[super setEditing:editing animated:animated];
}
That passes the state change along to the super class, but lets you jump in the middle and detect the change, or alter it if you wanted...
The setEditing:animated: examples didn't work for me (on iOS 6.1) to detect the state changes that occur when you enter and exit delete confirmation mode. It seems that setEditing:animated: is only called once, when the table view goes into edit mode, but not on state changes of the cells. After some debugger fun, I arrived at a method to detect the cell state change.
My use case is different from yours. I just wanted to hide the label when the delete button is showing so that the other cell content doesn't overlap it when the Delete button slides in. (I'm using UITableViewCellStyleValue2, the one with the blue label on the left and black label on the right.)
(In your UITableViewCell subclass)
- (void)willTransitionToState:(UITableViewCellStateMask)state {
[super willTransitionToState:state];
if (state & UITableViewCellStateShowingDeleteConfirmationMask) {
// showing delete button
[self.textLabel setAlpha:0.0f]; // <-- I just wanted to hide the label
}
}
- (void)didTransitionToState:(UITableViewCellStateMask)state {
if (!(state & UITableViewCellStateShowingDeleteConfirmationMask)) {
// not showing delete button
[self.textLabel setAlpha:1.0f]; // <-- show the label
}
}
Kendall 's answer works. I did it in following way.
// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
// Return NO if you do not want the specified item to be editable.
NSLog(#"Can edit %d", tableView.editing);
if (tableView.editing == 1) {
[self.editButtonItem setTitle:EDIT_BUTTON_TITLE];
}else {
[self.editButtonItem setTitle:DONE_BUTTON_TITLE];
}
return YES;
}
That method tells you when a user is editing a Cell, not put the table into editing mode. There is a method called when editing mode is entered, to ask each cell if it can be edited:
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
I don't think overriding setEditing:animated: makes sense, since you would have to subclass UITableView which is extra work and a class you need for no other reason, not to mention it would have to communicate the fact that editing had been turned on back to the controller.
One other option is to simply add the Edit button yourself - it's a built in UIBarButtonSystemItem, you can add it and then have it call your own method in which you do something specific then call setEditing:animated: on the UITableView itself.
The idea behind editing is that when editing is enabled, each cell is told to go to edit mode, and as asked if there are any specific editing controls that should be applied. So in theory there's no need to detect entry into editing mode beyond changing the appearance of cells. What are you trying to do when editing mode is entered?
I have a RootViewController class which is inherited from UITableViewController.
When a cell is deselected by the user I want to enable/disable certain buttons on the toolbar.
How do I trap the deselect event?
-(void)tableView:(UITableView *)tableView deselectRowAtIndexPath:(NSIndexPath *)indexPath animated:(BOOL)animated
{
if(indexPath.row <= rowNumber)
{
[viewButtton setEnabled:NO];
[editButtton setEnabled:NO];
}
}
I tried using this method but it doesn't seem to execute at all. Any ideas how cam this be done?
I do not think there is a deselectRowAtIndexPath event, there is a method that you can call to deselect the indexPath, but looking at the SDK I do not see an event for this in the UITableViewDelegate: http://developer.apple.com/iPhone/library/documentation/UIKit/Reference/UITableViewDelegate_Protocol/Reference/Reference.html.
Could you enable/disable certain buttons on the toolbar during the didSelectRowAtIndexPath: event?
-Rog
This is in the current beta SDK only which means it could be buggy / changed / unsupported...
I did noticed that your method declaration doesn't match the SDK (at least, the version I have).
Try removing animated:(BOOL)animated; I don't think it's applicable here.
See line ~345 in UITableView.h, and/or right click on didDeselectRowAtIndexPath and "Jump to Definition", where you'll probably find how the delegate method should be defined.
That said, if your goal is simply to "enable/disable certain buttons when a cell is selected",
- (NSIndexPath *)tableView:(UITableView *)tableView willSelectRowAtIndexPath:(NSIndexPath *)indexPath;
should work just fine. This will occur after they select the cell and before it's deselected. 'deselect' has to do more with animation than user interaction. The only reason I can think you would want to use deselect is maybe the aesthetic value of ensuring your event only occurs after the select cell is no no longer highlighted.