As the question states,I put several UITableView on ScrollView ,so I can swipe and see different UITableView with different content . But when I tap the UITableViewCell , it can't response
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
method . I already set the delegate and dataSource.
It is very weired that when I long press the UITableViewCell ,it response this method.
very confused me.
I found the reason after repeat checking the codes. It is because I added one UITapgesture on the ScrollView. It become normal after I delete it .
Related
My app displays some news in a UITableView. For each news-topic, the background color of the UITableViewCell is different (added a UIView in my custom cell).
So far, it works. But If I press on a UIBarButton to deselect one news-category, the content changes, but the background stays the same as before.
The color does not change, because the cell does not reload again after button click.
Any ideas?
Thank you!
You can set the color for the cell in (as per your logic):
- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
This will make sure the color is set every time the cell is displayed.
In your cellForRowAtIndexPath method, make sure that you're setting the color of the UITableViewCell.
Also, use [tableView reloadData];
I have a UITableView, and I press the row, but do not release finger, so didSelectRowAtIndexPath is not called yet, right?
How to detect on which row i clicked? in which method?
How to detect that I clicked on table view? Is there any method like rowIsPressed? or onTableViewTouchDown?
There are two options at least:
1) You can subclass UITableViewCell and than use the touchhandling you know from a default uiview. (Like touchesBegan: etc.) / OR add a custom uiview as contentView of the tablecell.
2) Add a gesturerecognizer to each tablecell.
To find out in which row you are, you could give every row a tag (which than refers to the row) in cellForRow:atIndexPath:
try this
- (NSIndexPath *)tableView:(UITableView *)tableView willSelectRowAtIndexPath:(NSIndexPath *)indexPath
There is no such method to detect the selected state before lifting the finger... I guess you should override the UITableView class and add a UIGestureRecognizer to it.
And about your second question, I think you are talking about this table view delegate method:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
But there is also another method that will give you the current selected row. This is it (directly from the table view class):
- (NSIndexPath *)indexPathForSelectedRow
Hope to have helped!
i want a Delete Button in my UITableView like in die AdressBook when editing a contact.
Is this a custom cell, or a UIButton?
To make such button you can do following:
Make your UITableView style Grouped.
Add +1 section to your table.
Say to your table that it is one cell for last section
Just return custom cell (with red background and appropriate label) for last section
If you implement the Delegate method's for edit the tableview
- (void)tableView:(UITableView *)tableView willBeginEditingRowAtIndexPath:(NSIndexPath *)indexPath
And than implement the DataSource method
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
For allowing to get that delete button when you swipe a cell use the
Cell Editing Style : UITableViewCellEditingStyleDelete
// Edit: Wrong answer.
Do you mean the Big one at the bottom or with the sign on the left?
use....
firstly use
[btn removeFromSuperview];
and
[tblobj reload];
I created a custom cell for my table view and for the most part everything seems to be working fine, but when I select one of the rows (which takes me to another UIView), then come back from the subsequent view via the nav controller, the selected cell is not in highlighted state. How to display the selected cell in highlighted state when i come back?
any help is appreciated in advance, thanks.
when you are coming back from anotherview make sure that save the selectedCell and then in viewwillappear method reloaddata.in cellforindexpath write the code of selection style uitableviewcellselectionstyleblue
As #sachin said, you should save selected index path
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
self.selectedIndexPath = indexPath;
}
and in
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
You should check if indexPath is equal to selectedIndexPath,
but you should be aware that Apple discoureges that kind of behavior in HIG: http://developer.apple.com/library/ios/#DOCUMENTATION/UserExperience/Conceptual/MobileHIG/UIElementGuidelines/UIElementGuidelines.html
In rare cases, a row might remain highlighted when secondary details
or controls related to the row item are displayed in the same screen.
However, this is not encouraged because it is difficult to display
simultaneously a list of choices, a selected item, and related details
or controls without creating an uncomfortably crowded layout.
I am trying to add a new view with 5 buttons to a cell once it is selected. I am trying to do this in 3 different ways. The first one is by checking if it is selected inside the
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
method.
if (cell == nil ) {
//initial customizaton of cells
} else {
if ([cell isSelected]) {
//I would add the view to the cell's contentView here but it never enters this if even though the cell is still blue, I scrolled the table back and forth several times and the blue cell never evaluated here
}
}
I have also tried to do it inside the following two methods:
- (NSIndexPath *)tableView:(UITableView *)tableView willSelectRowAtIndexPath:(NSIndexPath *)indexPath
And:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
I used tableView:cellForRowAtIndexPath: to get a reference to the cell and when I had that reference I tried adding the view inside the cell's contentView but it didn't seem to work(by "didn't work" I mean it didn't appear, I'll debug this further).
I know I didn't provide much detailed code but that's because I mainly want to know what's the general principle of how it should be done. I want to know why the cell doesn't stay with the selected property equal to YES even though it stays blue (when selectionStyle is the default one) when I tap it. I want it to stay "blue"(selected) with that view inside it until I deselect it and remove said view.
Did you try creating your own custom UITableViewCell? I think that is the point, you can overload setSelected: method there.
I followed NR4TR's advice and so far so good. I have subclassed UITableViewCell and have overridden the setSelected method in it.
Hoping this is useful to someone else in the future!