I want to display MKMapView in a last cell of UITableView.
I have a MKMapView in a UITableViewCell When I scroll the UITableViewCell it refreshes MKMapView. and it crashes with ERROR: MKMapView must be initialized on the main thread.
What should I do to prevent the MKMapView from reloading when I scroll my scrollview of UITableView ?
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
[self.view endEditing:YES];
if (indexPath.row !=[arrExit count]) //If it is not last cell
{
static NSString *CellIdentifier = #"BTSTicketsCellIdentifier";
BTSComparePricesCell *cell = (BTSComparePricesCell *)[tblComparePrices dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:#"BTSComparePricesCell" owner:self options:nil];
for (id oneObject in nib) if ([oneObject isKindOfClass:[BTSComparePricesCell class]])
cell = (BTSComparePricesCell *)oneObject;
}
if (!isDragging_msg && !isDecliring_msg)
{
[dicImages_msg setObject:[UIImage imageNamed:#"rowDefault.png"] forKey:[[arrExit objectAtIndex:indexPath.row] valueForKey:#"Merchant_Logo"]];
[self performSelectorInBackground:#selector(downloadImage_3:) withObject:indexPath];
}
return cell;
}
else{ //If it is a last cell
static NSString *CellIdentifier = #"BTSTicketsCell";
BTSMapViewCell *cell = (BTSMapViewCell *)[tblComparePrices dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:#"BTSMapViewCell" owner:self options:nil];
for (id oneObject in nib) if ([oneObject isKindOfClass:[BTSMapViewCell class]])
cell = (BTSMapViewCell *)oneObject;
}
CLGeocoder *geocoder = [[CLGeocoder alloc] init];
[geocoder geocodeAddressString:[flux objectForKey:#"Venue"]
completionHandler:^(NSArray* placemarks, NSError* error)
{
if (placemarks && placemarks.count > 0)
{
CLPlacemark *topResult = [placemarks objectAtIndex:0];
MKPlacemark *placemark = [[MKPlacemark alloc] initWithPlacemark:topResult];
[cell.MapVw addAnnotation:placemark];
CLLocationCoordinate2D _venue = placemark.coordinate;
[cell.MapVw setCenterCoordinate:_venue];
MKCoordinateRegion region = cell.MapVw.region;
region.span.longitudeDelta = 1.0;
region.span.latitudeDelta = 1.0;
[cell.MapVw setRegion:region animated:YES];
}
}
];
return cell;
}
}
Thanks in advance.
Try this, hope it will work
Create a MKMapView Instance with strong reference in your View Controller where you are loading the map in table view. Assign the lat long values to that map view instance. On CellforRowAtIndexpath set the cell.MapVw = mapViewInstance .
Related
I tried to load dynamic images in imageview and text in label ,its working fine in both simulator and ios device. (see below code)
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
ImageCell *cell = (ImageCell *)[self.TestTable dequeueReusableCellWithIdentifier:#"ImageCell"];
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone)
{
if (cell == nil) {
NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:#"ImageCell" owner:self options:nil];
cell = [topLevelObjects objectAtIndex:0];
}
}
else
{
if (cell == nil)
{
NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:#"ImageCell" owner:self options:nil];
cell = [topLevelObjects objectAtIndex:0];
}
}
cell.textlabels.text=#"Cable and Hose Carriers";
cell.ProductsImages.image = [UIImage imageNamed:#"cool.jpg"];
return cell;
}
But if i tried to load a data in uitextview in the custom tableview cells ,tableview is not scroll smoothly (stutter) in ios device but works fine in simulator.Please advise me to do it better.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
ImageCell *cell = (ImageCell *)[self.TestTable dequeueReusableCellWithIdentifier:#"ImageCell"];
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone)
{
if (cell == nil) {
NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:#"ImageCell" owner:self options:nil];
cell = [topLevelObjects objectAtIndex:0];
}
}
else
{
if (cell == nil)
{
NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:#"ImageCell" owner:self options:nil];
cell = [topLevelObjects objectAtIndex:0];
}
}
cell.ProductsDetailsTextView.delegate = self;
cell.ProductsDetailsTextView.text=[Descriptions objectAtIndex:indexpath.row];
return cell;
}
You are trying to do all things ON main thread. Your main thread starts blocking due to dynamic loading of data thats why tableview is not scrolling smoothly. Try to write code in different queue
// call background queue for dynamic loading of data
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), ^{
// load your dynamic data here
// call main queue here
dispatch_async(dispatch_get_main_queue(), ^{
// after loading data in background. use your downloaded data here.
});
});
Thats It.
I am new to iphone. my cutomcell label value is disappearing when I scroll the table view.
Again it appears when I click on that cell.
Can anyone help me?
Thanks in Advance.
//table view in view controller created in xib
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"ListOfProductsCell";
ListOfProductsCell *cell = (ListOfProductsCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell==nil) {
NSArray *nib =[[NSBundle mainBundle] loadNibNamed:#"ListOfProductsCell" owner:self options:nil];
cell = [nib objectAtIndex:0];
productItemDit=[productListArry objectAtIndex:indexPath.row];
NSString *offerStr= [NSString stringWithFormat:#"%.2f",[[productItemDit objectForKey:#"offer"] floatValue]];
NSString *fullCostStr=[[currencyCodeStr stringByAppendingString:#" "] stringByAppendingString:offerStr];
NSLog(#"%#",fullCostStr);
cell.itemCostLbl.text=fullCostStr;
} else {
cell.itemStepper = (UIStepper *) [cell viewWithTag:2];
cell.itemAddedLbl =(UILabel*)[cell viewWithTag:1];
}
if (tableView == self.searchDisplayProduct.searchResultsTableView) {
searchProductItemDit=[searchProductListArry objectAtIndex:indexPath.row];
NSLog(#"searchdit:%#",searchProductItemDit);
cell.itemNameLbl.text= [searchProductItemDit objectForKey:#"name"];
self.searchDisplayProduct.searchResultsTableView.separatorColor=[UIColor colorWithRed:200.0 green:0.0 blue:0.0 alpha:1.0];
} else {
productItemDit=[productListArry objectAtIndex:indexPath.row];
NSLog(#"dit:%#",productItemDit);
cell.itemNameLbl.text=[productItemDit objectForKey:#"name"];
}
cell.itemAddedLbl.text = [[NSString alloc] initWithFormat:#"%d",itemCount];
cell.itemImg.image = [UIImage imageNamed:#"profp.jpg"];
return cell;
}
Solved by doing like this
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"ListOfProductsCell";
ListOfProductsCell *cell = (ListOfProductsCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell==nil) {
NSArray *nib =[[NSBundle mainBundle] loadNibNamed:#"ListOfProductsCell" owner:self options:nil];
cell = [nib objectAtIndex:0];
} else {
cell.itemStepper = (UIStepper *) [cell viewWithTag:2];
cell.itemAddedLbl =(UILabel*)[cell viewWithTag:1];
}
if (tableView == self.searchDisplayProduct.searchResultsTableView) {
cell.itemNameLbl.text= [[searchProductListArry objectAtIndex:indexPath.row] objectForKey:#"name"];
} else {
cell.itemNameLbl.text=[[productListArry objectAtIndex:indexPath.row] objectForKey:#"name"];
}
cell.itemCostLbl.text=[NSString stringWithFormat:#"%# %.2f", currencyCodeStr , [[[productListArry objectAtIndex:indexPath.row] objectForKey:#"offer"] floatValue]];
cell.itemAddedLbl.text = [[NSString alloc] initWithFormat:#"%d",itemCount];
cell.itemImg.image = [UIImage imageNamed:#"profp.jpg"];
return cell;
}
As you haven't post much of the information this is my guess.when you scroll table view it internally calls the reloadData method . You need to use reuse Identifier to preserve the state of the cell. You can initialize the cell in cellForRowAtIndexPath like :
static NSString *cellIdentifier = #"cellID";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
// or cell initializing logic here for the custom cell
}
in case of custom cell add reuse identifier in the xib and use it in your cellForRowAtIndexPath method
Hi friends it is a Strange Issue I'm facing, I am using Multiple UItableCustomCells in one Grouped TableView with Section's.
I am able to Select first Section's rows only, then when I click on another Section's row it's selection method is not working, I can not understand where is mistake, my cellForRowAtIndexPath code is Below:-
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSString *CellIdentifier =[NSString stringWithFormat:#"%d",indexPath.row];
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
//if (cell == nil) {
if(indexPath.section==0)
{
if(indexPath.row==0)
{
[[NSBundle mainBundle]loadNibNamed:#"CustomCell1" owner:self options:nil];
cell = self.Cell1;
self.Cell1 = nil;
txtincidentName = (UITextField*)[cell.contentView viewWithTag:1];
}
else if(indexPath.row==1)
{
[[NSBundle mainBundle]loadNibNamed:#"CustomCell2" owner:self options:nil];
cell = self.Cell2;
self.Cell2 = nil;
lblDatefirst = (UILabel*)[cell.contentView viewWithTag:2];
btnCalfirst = (UIButton*)[cell.contentView viewWithTag:3];
lblTimeFirst = (UILabel*)[cell.contentView viewWithTag:4];
}
else if(indexPath.row==2)
{
[[NSBundle mainBundle]loadNibNamed:#"CustomCell2" owner:self options:nil];
cell = self.Cell2;
self.Cell2 = nil;
lblDatefirst = (UILabel*)[cell.contentView viewWithTag:2];
btnCalfirst = (UIButton*)[cell.contentView viewWithTag:3];
lblTimeFirst = (UILabel*)[cell.contentView viewWithTag:4];
lblInciTime =(UILabel*)[cell.contentView viewWithTag:9];
lblInciTime.text=#"Date/Time";
}
}
else if(indexPath.section==1)
{
if(indexPath.row==0)
{
[[NSBundle mainBundle]loadNibNamed:#"CustomCell3" owner:self options:nil];
cell = self.Cell3;
self.Cell3 = nil;
btndropDown1 = (UIButton*)[cell.contentView viewWithTag:5];
btndropDown2 = (UIButton*)[cell.contentView viewWithTag:6];
btndropDown3 = (UIButton*)[cell.contentView viewWithTag:7];
}
else if(indexPath.row==1)
{
[[NSBundle mainBundle]loadNibNamed:#"CustomCell4" owner:self options:nil];
cell = self.Cell4;
self.Cell4 = nil;
txtViewofdetails = (UITextView*)[cell.contentView viewWithTag:7];
}
}
return cell;
}
simulator image
Please Help and guide Thank you..
Don't load the cells from nibs like this. Instead register the cells with a reuse identifier in the NIB. This will cause the dequeueing pick the correct cell protoype based on the identifier.
Most likely your current approach messes up the touch handling of the table view.
hey try this type of concept and flow of the code
NSString *CellIdentifier =[NSString stringWithFormat:#"%d%d",indexPath.section,indexPath.row];
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:#"CustomCell1" owner:self options:nil];
for (id currentObject in topLevelObjects){
if ([currentObject isKindOfClass:[UITableViewCell class]]){
cell = (CustomCell1 *) currentObject;
break;
}
}
}
I've spent the last 3 hours scratching my head at this issue because all seems correct, except I can't get through to my tableviewcell class to set the uilabels in my custom cell.
here is my code
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"TableViewCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:#"TableViewCell" owner:self options:nil];
cell = (UITableViewCell *)[nib objectAtIndex:0];
//cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:MyIdentifier] autorelease];
}
//cell.imageViewSection =
// Set up the cell
int storyIndex = [indexPath indexAtPosition: [indexPath length] - 1];
NSString *textTitle = [[stories objectAtIndex: storyIndex] objectForKey: #"title"];
NSURL *imageurl = [NSURL URLWithString:[[stories objectAtIndex: storyIndex] objectForKey: #"description"]];
UIImage *image = [UIImage imageWithData: [NSData dataWithContentsOfURL:imageurl]];
cell.imageViewSection = image;
cell.titleLabelText.text = textTitle;
return cell;
}
If someone can help me out it would be awesome :)
You should not rely on the cell always being returned as object at index 0 in the array. Do a simple loop to find the actual cell.
And add typecasts for the cell subclass you use
-(UITableViewCell*)tableView:(UITableView*)tableView
cellForRowAtIndexPath:(NSIndexPath*)indexPath
{
static NSString* cellID = #"cellID";
MyCell* cell = (id)[tableView dequeueReusableCellWithIdentifier:cellID];
if (cell == nil) {
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:#"TableViewCell"
owner:self
options:nil];
for (cell in nib) {
if ([cell isKindOfClass:[MyCell class]]) {
break;
}
}
}
// Safely do tuff to cell
return cell;
}
This snippet assumes that the cell is at least available, the behavior if no table view cell is returned is undefined.
You're assigning and casting TableViewCell to UITableViewCell variable and UITableViewCell does not have those outlets. Instead, you should do the following..
TableViewCell *cell = (TableViewCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:#"TableViewCell" owner:self options:nil];
cell = (TableViewCell *)[nib objectAtIndex:0];
}
I have the following code:
- (CGFloat)tableView:(UITableView *) tableView heightForRowAtIndexPath:(NSIndexPath *) indexPath{
TestCell* cell = (ConvoreCell *) [tableView cellForRowAtIndexPath:indexPath];
CGSize textSize = [[cell text] sizeWithFont:[UIFont systemFontOfSize:14] constrainedToSize:CGSizeMake([tableView frame].size.width - 20, 500)];
return 80;
}
It crashes on the cellForRowAtIndexPath, why is this? The log doesn't tell me anything. Here's my cellForRowAtIndexPath method:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"ConvoreCell";
AsyncImageView *asyncImageView = nil;
TestCell * cell = (TestCell *) [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:#"TestCell" owner:nil options:nil];
for (id currentObject in topLevelObjects){
if ([currentObject isKindOfClass:[UITableViewCell class]]){
cell = (ConvoreCell *) currentObject;
break;
}
}
asyncImageView = [[[AsyncImageView alloc] init] autorelease];
asyncImageView.imageview = cell.icon;
}
else {
asyncImageView = (AsyncImageView *) [cell.contentView viewWithTag:ASYNC_IMAGE_TAG];
}
NSMutableDictionary *cellValue = [results objectAtIndex:indexPath.row];
NSString *picURL = [[cellValue objectForKey:#"user"] objectForKey:#"img"];
if ([picURL isEqualToString:#"https://secure.gravatar.com/avatar/1f043010eb1652b3fab3678167dc0487/?default=https%3A%2F%2Fconvore.com%2Fmedia%2Fimages%2Feric.png&s=80"])
picURL = #"https://test.com/media/images/eric.png";
[asyncImageView loadImageFromURL:[NSURL URLWithString:picURL]];
cell.title.text = [cellValue objectForKey:#"message"];
cell.info.text = [NSString stringWithFormat:#"%# %# days ago", [[cellValue objectForKey:#"user"] objectForKey:#"username"], [cellValue objectForKey:#"date_created"] ];
return cell;
}
All I want to do is to resize the height of the cell according to the cell.title.text....
It's wrong to call cellForRowAtIndexPath: manually. You have to store those strings separately in array and obtain them from there.
A rule of thumb: don't call framework callbacks manually.