I have 3 UILabels in each cell of a table. I have added tap gesture recognisers to each one, but when it is tapped, how can I get the index path of the row that was tapped?
Here is my code
UILabel *tit_lbl=[[UILabel alloc]initWithFrame:CGRectMake(10,10,280,45)];
[tit_lbl setText:[[final_dictionaires_array objectAtIndex:indexPath.row] objectForKey:title]];
[tit_lbl setUserInteractionEnabled:YES];
[tit_lbl setTag:indexPath.row];
[btn addSubview:tit_lbl];
[tit_lbl release];
UITapGestureRecognizer* tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(goToArticleDetailsView:)];
[tit_lbl addGestureRecognizer:tapRecognizer];
[tapRecognizer release];
With this, I can get the label action but I want to get which label is clicked in which Row ?? (I have 3 labels in each row).
I agree with the suggestions for using a button with a custom style instead of basically recreating buttons using labels and gesture recognisers. However, you'd still have the same problem. Which label was tapped? And which row of the table was it in?
You can find out which label was tapped by assigning tags to each one and then querying the view property of the gesture recogniser. The gesture recogniser will be the argument in your goToArticleDetailsView method:
-(void)goToArticleDetailsView:(id)sender
{
UITapGestureRecognizer *tapGR = (UITapGestureRecognizer*)sender;
if (tapGR.view.tag == 1)
// tapGR.view is the label that the gesture recognize was attached to
You can find out which row of the table was tapped using the gesture recogniser's locationOfTouch method, together with UITableView's indexPathForRowAtPoint: method:
CGPoint touchLocation = [tapGR locationOfTouch:0 inView:self.tableView];
NSIndexPath *tappedRow = [self.tableView indexPathForRowAtPoint:touchLocation];
A UILabel can not be clicked. You should use the UITextfield if you want to let the user to interact with the values.
To get the action you should sent a message to the instance of UITextField.
To get the right cell you can use the "indexPath"
good luck
Related
I have a UITextView in a UITableViewCell. I have set it to become first responder when the cell is selected as so:
TPNTableViewCell *thisCell = (TPNTableViewCell *)[tblMain cellForRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:0]];
thisCell.txtHidden.text=#"";
[thisCell.txtHidden becomeFirstResponder];
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(goAwayKeyboard)];
[self.view addGestureRecognizer:tap];
So when the cell is selected txtHidden becomes first responder. And then the selector goAwayKeyboard is triggered when you click out of the keyboard.
-(void)goAwayKeyboard
{
TPNTableViewCell *thisCell = (TPNTableViewCell *)[tblMain cellForRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:0]];
[thisCell.txtHidden resignFirstResponder];
}
This works, however after the keyboard is resigned I can no longer select a cell in the table view. I can scroll the table view, but the cells aren't selectable and I can't figure out why.
The tap gesture recognizer is probably swallowing all touch events after it's added to the view. Perhaps removing it in -goAwayKeyboard would restore touch interaction.
You should disable the tap gesture in go away keyboard, You can do this with the help of below code,
tap.enabled = NO;
I'm using a custom table where every cell holds several elements, one of them is a favourite "star" icon.
I want to add a tap gesture so when the star icon is tapped it would change to "unfavourite" icon (and vice versa).
I've tried to add a tap gesture in cellForRowAtIndexPath with:
UITapGestureRecognizer *tapRecognizer;
tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(favTapped)];
[[cell.contentView viewWithTag:1] addGestureRecognizer:tapRecognizer];
But tapping the icon would just call didSelectRowAtIndexPath (obviously).
My selector "favTapped" won't be called.
Any idea how to do it?
Thanks!
you need to add the
GestureRecognizer as property to your custom cell class.
in your customCell.h:
' #property (weak, nonatomic ) UIButton *yourButton; // or swipeGesture'
in tableView:cellForRowAtIndexPatch:
[cell.yourButton addTarget:self action:#selector(yourMethod) forControlEvents:yourControlEvent]; // also aviable for gestures
also verify if User interaction is enabled (in your interface builder, you can also override this in your own class or). the most simple way to do this is to write in tableView:cellForRowAtIndexPatch:
[cell.contentView setUserInteractionEnabled:YES];
I have a UITableView with a couple of UITableViewCells in it. Because I only have a couple of cells, there is an area of the table view that's not covered by the cells. And I want to do something when the empty area is tapped.
I tried adding a UITapGestureRecognizer on the table view. It detects the tapping on the empty area, but then the cells fail to respond to tapping. I tried adding the tap gesture recognizer on the super view of the table view, but the result is the same.
There must be a way to do this, but I can't quite figure it out yet. Is there any way to achieve what I want to do?
Try this:
initialize and add the UITapGestureRecognizer to your tableView:
UITapGestureRecognizer *gr = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(tap:)];
gr.delaysTouchesBegan = YES;
gr.delegate = self;
[_tableView addGestureRecognizer:gr];
implement the gesture recognizer delegate method:
-(BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer{
CGPoint tapPoint = [gestureRecognizer locationInView:_tableView];
UIView * clickedView = [_tableView hitTest:tapPoint withEvent:nil];
NSString *viewClassName = NSStringFromClass(clickedView.class);
return ![viewClassName hasPrefix:#"UITableViewCell"];
}
this way every tap you do outsude cells (but inside the tableview) will be recognized with your UITapGestureRecognizer
The last line: return ![viewClassName hasPrefix:#"UITableViewCell"];
should be changed to return [viewClassName hasPrefix:#"UITableView"]; since the cell you are clicking doesn't have to be a UITableViewCell, but a UIView or some other custom view
What is the best way to display a strikethrough animation? When a user swipes their finger across a UITableViewCell, I would like to animate a thin line across cell.textlabel.text
The two ways I've thought of so far would be using Animation or somehow displaying a custom image and revealing it slowly from left to right? Does anybody have any advice on this?
I already have the swipe gestures working, I now just need to know how to make the animation happen:
Add Gesture Recognizer:
//Add a left swipe gesture recognizer
UISwipeGestureRecognizer *recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self
action:#selector(handleSwipeLeft:)];
[recognizer setDirection:(UISwipeGestureRecognizerDirectionLeft)];
[self.tableView addGestureRecognizer:recognizer];
//Add a right swipe gesture recognizer
recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self
action:#selector(handleSwipeRight:)];
recognizer.delegate = self;
[recognizer setDirection:(UISwipeGestureRecognizerDirectionRight)];
[self.tableView addGestureRecognizer:recognizer];
Delegate Methods for Gestures:
- (void)handleSwipeLeft:(UISwipeGestureRecognizer *)gestureRecognizer
{
NSLog(#"uncompleted");
}
// Cross Item off of the list
- (void)handleSwipeRight:(UISwipeGestureRecognizer *)gestureRecognizer
{
NSLog(#"completed");
}
Based on what you have so far the following should work:
when handleSwipeLeft (or right) fires, place a new UIView with a black background color over the textfield at the textfield's x point and around halfway to the y point with a width of 0 and height of 1
then, call [UIView animationWithDuration....] changing the UIView's width property to be roughly the width of the textfield.
This should be close to what you want with some tweaking. I don't think it will be possible to animate the strikethrough from using the properties of the font alone but this technique should simulate it just fine.
Good job on getting half way there.
I have a LongPress gesture recognizer initialized in the viewDidLoad method of my viewcontroller as below:
longPressGesture_= [[UILongPressGestureRecognizer alloc] initWithTarget:self action:#selector(displayTimeFlagCallout)];
I have a tableview in my viewcontroller. The tableview has custom cells. Each cell has 2 textfields. I want to bring up a custom popover when a user long presses on the text fields (startTime and endTime). I do not want the magnifying glass and the Copy/Paste popover to show up on long press of textfield as the standard behavior and hence before adding my gesture recognizer, I am disabling the in-built long press gesture recognizer of the text fields. I have added the following code to my cellforRowAtIndexPath method:
MyCustomCell_iPhone *cell = [tableView dequeueReusableCellWithIdentifier:cellID];
if (cell == nil)
{
cell = [[MyCustomCell_iPhone alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellID];
for (UIGestureRecognizer *recognizer in cell.startTime.gestureRecognizers) {
if ([recognizer isKindOfClass:[UILongPressGestureRecognizer class]]){
recognizer.enabled = NO;
}
}
for (UIGestureRecognizer *recognizer in cell.endTime.gestureRecognizers) {
if ([recognizer isKindOfClass:[UILongPressGestureRecognizer class]]){
recognizer.enabled = NO;
}
}
[cell.startTime addGestureRecognizer:longPressGesture_];
[cell.endTime addGestureRecognizer:longPressGesture_];
}
However, this is not working. Nothing happens on long press now. Any ideas what could be the issue?
Thanks
Hetal
Three thoughts:
You cannot use the same long press gesture recognizers for two controls. You have to create a separate gesture recognizer for each control.
It would appear that the gesture recognizers get reset when you start editing in text field (assuming you allow editing in the text field). I assume you allow editing of the text field, and, if so, I believe that you have to set a delegate that will disable the long gesture recognizer that is not your own. (You can do that, for your long press gesture recognizer, subclass it as, say CustomLongPressGestureRecognizer, use that for your text field's gesture recognizers and then you can disable any UILongPressGestureRecognizer objects that are not your own CustomLongPressGestureRecognizer.)
I infer from your code that you're not using storyboards and prototype cells, because in that scenario, cell is never nil and your if statement would never end up invoking your code. But if you're using NIBs or not using prototype cells, then you should be fine on this point.