I'm using AQGridView for displaying a TableView in grid format.
I've a problem that, randomly, the GridCell needs to be tapped twice to trigger the
didSelectItem
method.
On the first tap the cell highlights itself, but no didSelectItem method is called.
On the second tap the method is called.
Any ideas?
The Problem occurs probably only, when you reselect the previous selected GridCell.
So you have to add in your viewDidAppear the following Statement:
[self.gridView deselectItemAtIndex:self.gridView.indexOfSelectedItem animated:YES];
You can also just implement gridView:willSelectItemAtIndex instead, and return NSNotFound so nothing will be selected.
Related
In my UITableView I have rows which contain 4 textfields each. After user ends editing couple of things in UITableView datasource are being recalculated, so I need to reload UITableView after edition of textfield. But because tableview is being reloaded, when user touches another textfield to edit while editing the first one, second textfield doesn't get selected. He has to touch it again before it can be edited.
Is there a way to avoid this behaviour? Unfortunately I do need to use reloadData instead of reloadSections or reloadRows methods. Any help will be appreciated, thanks!
Reloading a table view will resign the first responder of the text field or even text view. You could try this trick if you have multiple changes that need to be made.
[[self tableView] beginUpdates]
[[self tableView] endUpdates]
Try assigning a gestureRecognizer to each field or same one to all fields. Once you capture the touch in required field, capture the tag and make that field the firstResponder.
Summing up all the help I received and my own ideas I've gone with the following:
-Delay reload for 0.01 sec so textFieldDidBeginEditing gets called
-Then save textfield's tag and cell's index path to variables in textFieldDidBeginEditing
-Call reloadData on tableview
-Call becomeFirstResponder on textfield saved with variables
This however caused keyboard hiding for a brief moment as it didn't have any responder during reloading. To resolve that I created a fake textfield in tableview's superview and assigned him as a responder up to a moment when tableview was reloaded to assign back to the textfield that was selected by a user.
Certainly not the cleanest solution, but it works.
So I have the following:
A UITableView with deletable cells (the kind where you swipe the cell then click the delete button)
The UITableView's properties (eg. a UILabel) are automatically updated (with a reloadData call on the UITableView) every second by a NSTimer (this is required)
The problem is that the reloadData call clears the delete button after swiping (within a second of course). How can I keep this from happening?
Thank you!
u can keep a boolean flag variable that becomes true if the delete button is visible and false if not and in the place where u call reloadData u can check the flag value and function accordingly
When the user swipes a UITableViewCell, tableView's isEditing property will be set to YES. You should check this property before you reload your table.
All I need to do was to set the UILabels text property from the NSTimers invocation method call and it doesn't even require a reloadData call to update the UILabel...
How to get the selection cell still in the selected state in uitableview. Actually I am pushing a view from a tableview when came back then the selection cell is deseleted. I want to be show the previous selection cell when came back also how to do that.
In didselectrowatindexpath use the method selectRowAtIndexPath:animated:scrollPosition: and the row stays selected.
when you are going and 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.
first, you can store the selected indexPath in user default in the didSelectRowAtIndexPath method.(maybe you can store a indexPath that is bigger than your table view's row count to indicate initialization stage, which means that no row has ever been selected)
then, you can load the stored indexPath in the viewDidLoad method using
tableView selectRowAtIndexPath:<#(NSIndexPath *)#> animated:<#(BOOL)#> scrollPosition:<#(UITableViewScrollPosition)#>
meanwhile, you can do some check (like mentioned above or something else) to check if there's nothing selected yet.(saving a bool in user defaults works, too)
So I am trying to default to having the first row in a tableView selected when my view first loads. I am doing this my viewWillAppear method:
NSIndexPath *tempPath= [NSIndexPath indexPathForRow:0 inSection:0];
[theTable.delegate tableView:theTable didSelectRowAtIndexPath:tempPath];
Which fires the method, but the cell doesn't stay selected. This fires the proper method and executes the code in there, and I am never deselecting it. After the user presses another cell, it stays selected properly. Just not the first time. Does anyone know what may be causing this weirdness? I have even tried to do this:
[[theTable.delegate tableView:theTable cellForRowAtIndexPath:tempPath] setSelected:YES];
Thoughts?
First of all, you shouldn't be calling the delegate methods directly like that.
If you do need to select a cell programmatically (like the Mail app does), use the selectRowAtIndexPath method:
[theTable selectRowAtIndexPath:tempPath animated:YES scrollPosition:UITableViewScrollPositionBottom];
According to the HIG, you aren't supposed to leave table view cells in a selected state. You are encouraged (strongly) to deselect the row as soon as you perform whatever action the tap requires.
For persistent selections, you are supposed to use the accessory, and you can set a cell's accessory to a checkmark to indicate "Selected"
currently I'm struggling with this problem:
I got a UITableViewController that displays a tableView with different custom cells.
One custom cell displays a number (by a label). If you click on this cell, the navigationController moves to a UIPicker where the user can select the number to be displayes.
If the user moves back, the cell should display the updated value.
Problem:
I managed to reload the cells by calling
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
[self.tableView reloadData];
}
in the UITableViewController.
This works only, if I don't use dequeueReusableCellWithIdentifier for the cell (tables won't show updates otherwise).
But in this case, memory usage grows and grows...
In addition, the program crashes after about 15 movements to pickerView and back - I think because the cell that should be reloaded is already released.
How can I update a reusable custom cell every time the view appears ?
What is the best solution ?
I think retaining cells should not be used ?
A general approach is to avoid reloading the whole table if only one cell is changed.
In such case, just get the reference to the UITableViewCell you want to "refresh" and invoke a [self setNeedsDisplay] from the main thread on it to trigger its refresh (will call the drawRect on it to trigger its drawing).
Have you set the appropriate id in the NIB? It has to be the same as you use when calling dequeueReusableCellWithIdentifier:
See step 3 here