If I call reloadRowsAtIndexPaths for the first cell of a section, with previous section empty and the one above not-empty, I get a strange animation glitch (even if I specify "UITableViewRowAnimationNone") where the reloaded cell slides down from the above section..
I tried to simplify the example as much as possible:
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 3;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
if (section == 0)
return 1;
else if (section == 1)
return 0;
else if (section == 2)
return 3;
return 0;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
// Configure the cell...
cell.textLabel.text = #"Text";
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
NSArray *editedCell = [[NSArray alloc] initWithObjects:indexPath, nil];
//[self.tableView beginUpdates];
[self.tableView reloadRowsAtIndexPaths:editedCell withRowAnimation:UITableViewRowAnimationNone];
//[self.tableView endUpdates];
}
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
return #"Section";
}
Actually you can comment out the last method, but it gives a better understanding of the problem.
You can set values you want to the cell directly, not letting table to reload itself (and thus avoiding any unwanted animations). Also to make code clearer and avoid code duplication lets move cell setup to a separate method (so we'll be able to call it from different locations):
- (void) setupCell:(UITableViewCell*)cell forIndexPath:(NSIndexPath*)indexPath {
cell.textLabel.text = #"Text"; // Or any value depending on index path
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
[self setupCell:cell forIndexPath:indexPath];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
// create cell
// Configure the cell...
[self setupCell:cell forIndexPath:indexPath];
return cell;
}
Related
So this is driving me nuts, whenever I tap an item in my UITableView it does nothing, but when i press and hold the UITableViewCell after about 3-5 seconds it decides to move forward and do what I want.. any thoughts why this might be happening?
Here's my code
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
return 1;
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
return 100;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
_cell = [_arrayItems objectAtIndex:indexPath.row];
_cell = nil;
static NSString *AutoCompleteRowIdentifier = #"AutoCompleteRowIdentifier";
_cell = (CustomWidget *)[tableView dequeueReusableCellWithIdentifier:AutoCompleteRowIdentifier];
if (_cell == nil) {
_cell = [[CustomWidget alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:AutoCompleteRowIdentifier title:[_arrayItems objectAtIndex:indexPath.row] subTitle:#"Custom subtitle"];
}
_cell.textLabel.text = [_arrayItems objectAtIndex:indexPath.row];
_cell.textLabel.hidden = YES;
return _cell;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return _arrayItems.count;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
UITableViewCell *selectedCell = [tableView cellForRowAtIndexPath:indexPath];
_passedInPageTitle = selectedCell.textLabel.text;
[self openDetailPage];
}
I found my answer here - I had a UITapGestureRecognizer on the UITableView's parent view, which was capturing the tap.
I have made customCell for my UITableView. I am downloading data from server and showing on CustomCells.
The method of manipulating data is
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"CustomCellReuseID";
LeaderBoardCell *cell = [leaderBoardTable dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[LeaderBoardCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
GetScoreBoard *ob = [leaderBoardArray objectAtIndex:indexPath.row];
[[cell title] setText:ob.fullname];
[[cell discription] setText:ob.points];
return cell;
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [leaderBoardArray count];
}
The CustomCell "LeaderBoardCell" is loading later, but before this I see simple cells which are default in UITableView.
Is is possible to load only CustomCell in TableVeiw?
When I do simple HelloWorld app I have problem with
[self.tableView insertRowsAtIndexPaths:#[indexPath]withRowAnimation:UITableViewRowAnimationAutomatic]
,this method doesn't work... and i don't know why? pliz help
Code:
- (void)viewDidLoad
{
int i = 0;
[super viewDidLoad];
while (i < 10 ) {
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0];
[self.tableView insertRowsAtIndexPaths:#[indexPath]withRowAnimation:UITableViewRowAnimationAutomatic];
i++;
}
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return 1;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
cell.textLabel.text = #"HelloWorld";
return cell;
}
App should create 10 cells with Label #"HelloWorld"
You're going about this the wrong way. If you want 10 cells you shouldn't be trying to add them one at a time, you should just return 10 in numberOfRowsInSection, e.x:
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return 10;
}
Additionally, nothing will show up in the cells because you have call alloc/init on the cells in cellForRowAtIndexPath. Modify your code to do so like this:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
cell.textLabel.text = #"HelloWorld";
return cell;
}
So I have a subclassed UITableView that lists data. I need to make only one cell selectable.
- (NSIndexPath *)tableView:(UITableView *)tableView willSelectRowAtIndexPath:(NSIndexPath *)indexPath {
// rows in section 0 should not be selectable
UITableViewCell *cell = (UITableViewCell *)[tableView cellForRowAtIndexPath:indexPath];
if (indexPath.row == 3) {
cell.userInteractionEnabled = YES;
cell.selectionStyle = UITableViewCellSelectionStyleGray;
NSLog(#"Hey whats up, address");
return indexPath;
}
else {
cell.selectionStyle = UITableViewCellSelectionStyleNone;
}
return nil;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
[tableView deselectRowAtIndexPath:indexPath animated:YES];
}
My code that does this so far works, but only after the cell is clicked at least once. Placing it in didSelectCell allows the cell to be selected if held down for 1-2 seconds.
You should do that in the cellForRowAtIndexPath. Like this:
-(UITableViewCell*)tableView:(UITableView *)aTableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
// your code
if(indexPath.row != 3)
{
[cell setSelectionStyle:UITableViewCellSelectionStyleNone];
{
}
And then on didSelectRowAtIndexPath:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
if(indexPath.row == 3)
{
//do your stuff
{
}
im using core data i have an entity called questions whenever i add my question to my table i want them to display the number of the question (kind of like auto increment thing)
can anyone pls help me out
thanks
here is my code if its relevant
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
return [self.questionArray count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"cell"];
// Configure the cell...
questionObject = [self.questionArray objectAtIndex:indexPath.row];
cell.textLabel.text = questionObject.questionDescription;
return cell;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"cell"];
if (nil == cell) {
cell = ...; //create a cell instance if it wasn't found in reusable cache
}
// Configure the cell...
questionObject = [self.questionArray objectAtIndex:indexPath.row];
NSString *cellText = [NSString stringWithFormat:#"%d. %#", indexPath.row+1, questionObject.questionDescription];
cell.textLabel.text = cellText;
return cell;
}