NSString *url = [NSString stringWithFormat:#"%#",[enclosureUrlArray objectAtIndex:indexPath.row]];
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), ^{
NSData *imageData = [NSData dataWithContentsOfURL:[NSURL URLWithString:url]];
([self.tableView cellForRowAtIndexPath:indexPath]);
dispatch_async(dispatch_get_main_queue(), ^{
cell.tag = indexPath.row;
UIImage *image = [UIImage imageWithData:imageData];
cell.IMGLabel.image = image;
[cell.IMGLabel setImage:image];
[cell.IMGLabel.layer setMasksToBounds:YES];
[cell.IMGLabel.layer setCornerRadius:2.5f];
[cell setNeedsLayout];
});
});
Related
I am trying to add an activity indicator into an imageView as follows when I am downloading the contents from url but the problem is that the activity indicator is not visible.
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *identifier = #"Cell";
UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];
UIImageView *recipeImageView = (UIImageView *)[cell viewWithTag:100];
recipeImageView.image = nil;
if ([imageArray count] >0){
if(cachedImage[[imageArray objectAtIndex:indexPath.row]] != nil){
recipeImageView.image = cachedImage[[imageArray objectAtIndex:indexPath.row]];
}
else{
UIActivityIndicatorView *activityIndicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
activityIndicator.frame = CGRectMake(140, 236, 37, 37);
[activityIndicator startAnimating];
[recipeImageView addSubview:activityIndicator];
self.view.userInteractionEnabled = NO;
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), ^(void) {
NSData *data0 = [NSData dataWithContentsOfURL: [NSURL URLWithString:[imageArray objectAtIndex:indexPath.row]]];
UIImage *image = [UIImage imageWithData: data0];
dispatch_sync(dispatch_get_main_queue(), ^(void) {
recipeImageView.image = image;
[activityIndicator stopAnimating];
cachedImage[[imageArray objectAtIndex:indexPath.row]] = image;
});
});
}
}
How can i be able to show the activity indicator within imageview with progress percent if possible?
Just update your code and try this
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *identifier = #"Cell";
UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];
UIImageView *recipeImageView = (UIImageView *)[cell viewWithTag:100];
recipeImageView.image = nil;
if ([imageArray count] >0){
if(cachedImage[[imageArray objectAtIndex:indexPath.row]] != nil){
recipeImageView.image = cachedImage[[imageArray objectAtIndex:indexPath.row]];
}
else{
UIActivityIndicatorView *activityIndicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
[activityIndicator setCenter: recipeImageView.center];
[activityIndicator startAnimating];
[cell.contentView addSubview:activityIndicator];
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), ^(void) {
NSData *data0 = [NSData dataWithContentsOfURL: [NSURL URLWithString:[imageArray objectAtIndex:indexPath.row]]];
UIImage *image = [UIImage imageWithData: data0];
dispatch_sync(dispatch_get_main_queue(), ^(void) {
recipeImageView.image = image;
[activityIndicator removeFromSuperview];
cachedImage[[imageArray objectAtIndex:indexPath.row]] = image;
});
});
}
}
Try this:
UIActivityIndicatorView *activityIndicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
activityIndicator.center = recipeImageView.center;
[activityIndicator startAnimating];
[recipeImageView addSubview:activityIndicator];
self.view.userInteractionEnabled = NO;
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), ^(void) {
NSData *data0 = [NSData dataWithContentsOfURL: [NSURL URLWithString:[imageArray objectAtIndex:indexPath.row]]];
UIImage *image = [UIImage imageWithData: data0];
dispatch_sync(dispatch_get_main_queue(), ^(void) {
recipeImageView.image = image;
[activityIndicator stopAnimating];
[activityIndicator removeFromSuperview];
cachedImage[[imageArray objectAtIndex:indexPath.row]] = image;
});
});
UIActivityIndicatorView *indicator = [[UIActivityIndicatorView alloc]initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
[indicator startAnimating];
[indicator setCenter:self.recipeImageView.center];
[self.contentView addSubview:indicator];
im trying to load a set of images from web and display it on the screen within a collection view. Following is my code
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];
cell.layer.cornerRadius = 5;
NSURL *url = [NSURL URLWithString:
#"http://elatewiki.org/images/thumb/Google.png/120px-Google.png"];
UIImage *image = [UIImage imageWithData: [NSData dataWithContentsOfURL:url]];
UIImageView *recipeImageView = (UIImageView *)[cell viewWithTag:100];
//recipeImageView.image = [UIImage imageNamed:[recipePhotos objectAtIndex:indexPath.row] ];
recipeImageView.image = [UIImage imageWithData: [NSData dataWithContentsOfURL:recipPhotoUrl[0] ]];
return cell;
}
but i have to use the objectAtIndex:indexPath.row property along with imageWithData so the image can be swiped . Is there any ways through which i can use objectAtIndex:indexPath.row along with NSData dataWithContentsOfURL ?
You can use this:
NSString *url_str = [NSString stringWithFormat: #"%#",[recipPhotoUrl objectAtIndex: indexPath.item]];
NSURL *url = [NSURL urlWithString:url_str];
recipeImageView.image = [UIImage imageWithData: [NSData dataWithContentsOfURL:url]];
What's the for?
NSURL *url = [NSURL URLWithString:
#"http://elatewiki.org/images/thumb/Google.png/120px-Google.png"];
UIImage *image = [UIImage imageWithData: [NSData dataWithContentsOfURL:url]];
Anyway, you were close to solution....
if (recipPhotoUrl.count > indexPath.row)
{
recipeImageView.image = [UIImage imageWithData: [NSData dataWithContentsOfURL:recipPhotoUrl[indexPath.row]]];
}
But still, you are doing this operations on the main thread and you, for sure, block the UI, the scroll will not be smooth.
It also not so sure as you're accessing the index without checking if the array has a sufficient dimension.
UIImage *image = [UIImage imageWithData: [NSData dataWithContentsOfURL:url]];
should be placed in a common function.For example -(void)viewDidLoad, add a property reference to image .
recipeImageView.image = [UIImage imageWithData: [NSData dataWithContentsOfURL:recipPhotoUrl[0]]];
change to
recipeImageView.image = self.image;
I am using array of url's for images to load in collection view. Images are changing while scrolling the collection view. How to fix this issue?
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *cellIdentifier = #"RecentProductCell";
RecentProductCell *recentCell = [collectionView dequeueReusableCellWithReuseIdentifier:cellIdentifier forIndexPath:indexPath];
recentCell.recentProductImg.image = nil;
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), ^{
NSString *imageurl = [[latestProducts valueForKey:#"image"]objectAtIndex:indexPath.item];
NSData *imageData = [NSData dataWithContentsOfURL:[NSURL URLWithString:imageurl]];
dispatch_sync(dispatch_get_main_queue(), ^{
recentCell.recentProductImg.image = [UIImage imageWithData:imageData];
});
});
}
Replace dispatch_sync(dispatch_get_main_queue(), ^{
recentCell.recentProductImg.image = [UIImage imageWithData:imageData];
});
with
dispatch_sync(dispatch_get_main_queue(), ^{
if ( imageData )
{
UIImage *urlImage = [[UIImage alloc] initWithData:imageData];
RecentProductCell *recentCell = (id)[collectionView cellForItemAtIndexPath:indexPath];
if (recentCell)
[recentCell.recentProductImg setImage:urlImage];
}
});
Let me know if this works for you.
cell.imageView.image = nil;
dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0ul);
dispatch_async(queue, ^(void) {
NSString *imageurl = [[latestProducts valueForKey:#"image"]objectAtIndex:indexPath.item];
NSData *imageData = [NSData dataWithContentsOfURL:[NSURL URLWithString:imageurl]];
UIImage* image = [[UIImage alloc] initWithData:imageData];
if (image) {
dispatch_async(dispatch_get_main_queue(), ^{
if (cell.tag == indexPath.row) {
cell.imageView.image = image;
[cell setNeedsLayout];
}
});
}
});
Write this code in cellForRowAtIndexPath method of collectionView
/Problem is that, I created my own contentviews in UITableview and showing. While scrolling the table view is giving Jerking. How to resolve this issue./
[cell setAccessoryType:UITableViewCellAccessoryDisclosureIndicator];
/ImageDetails, I am receiving from server and loading using lazy loading./
UIImageView *lblImage = [[UIImageView alloc]initWithFrame:CGRectMake(10, 10, 60, 60)];
lblImage.contentMode = UIViewContentModeScaleAspectFill;
[cell.contentView addSubview:lblImage];
if([[[lArray objectAtIndex:indexPath.row] objectForKey:#"Foto"] length] > 0){
NSURL *imageURL = [NSURL URLWithString:[[lMovikidListArray objectAtIndex:indexPath.row] objectForKey:#"MovikitFoto"]];
NSString *key = [[[lArray objectAtIndex:indexPath.row] objectForKey:#"Foto"] MD5Hash];
NSData *data = [FTWCache objectForKey:key];
if (data) {
UIImage *image = [UIImage imageWithData:data];
lblImage.image = image;
} else {
lblImage.image = [UIImage imageNamed:#"defaultprofile.png"];
dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0ul);
dispatch_async(queue, ^{
NSData *data = [NSData dataWithContentsOfURL:imageURL];
[FTWCache setObject:data forKey:key];
UIImage *image = [UIImage imageWithData:data];
dispatch_sync(dispatch_get_main_queue(), ^{
lblImage.image = image;
});
});
}
CALayer *imageLayer = lblImage.layer;
[imageLayer setCornerRadius:lblImage.frame.size.width/2];
[imageLayer setMasksToBounds:YES];
}
else{
lblImage.image = [UIImage imageNamed:#"defaultprofile.png"];
}
UILabel *lblTitle = [[UILabel alloc]initWithFrame:CGRectMake(75, 10, 220, 25)];
lblTitle.text = [NSString stringWithFormat:#"%# - %#", [[lArray objectAtIndex:indexPath.row] objectForKey:#"Name"], [[lArray objectAtIndex:indexPath.row] objectForKey:#"SimNo"]];
lblTitle.font = [UIFont boldSystemFontOfSize:14.0f];
[cell.contentView addSubview:lblTitle];
UILabel *lblSubTitle = [[UILabel alloc]initWithFrame:CGRectMake(100, 40, 195, 35)];
if([[[lArray objectAtIndex:indexPath.row] objectForKey:#"Location"] length] <= 1){
lblSubTitle.text = LOCATION_NOT_AVAILABLE;
lImageName = #"caution_icon.png";
}
else{
lblSubTitle.text = [self calculateDistance:<some data>];
}
lblSubTitle.textColor = [UIColor darkGrayColor];
lblSubTitle.numberOfLines = 2;
lblSubTitle.font = [UIFont italicSystemFontOfSize:12.0f];
[cell.contentView addSubview:lblSubTitle];
/This image is a small image to show some indicators./
UIImageView *lblIndicatorImage = [[UIImageView alloc]initWithFrame:CGRectMake(75, 45, 20, 20)];
lblIndicatorImage.image = [UIImage imageNamed:lImageName];
[cell.contentView addSubview:lblIndicatorImage];
[cell setNeedsDisplay];
You cant do any UIKit operation on background thread. So just remove your graphical operation from background thread and it will be fine.
else {
lblImage.image = [UIImage imageNamed:#"defaultprofile.png"];
dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0ul);
dispatch_async(queue, ^{
NSData *data = [NSData dataWithContentsOfURL:imageURL];
[FTWCache setObject:data forKey:key];
dispatch_async(dispatch_get_main_queue(), ^{
UIImage *image = [UIImage imageWithData:data];
lblImage.image = image;
});
});
How can i check web service with database if database have will show image in database but not its will show image from web service
-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
BookCell *bookcell = [collectionView dequeueReusableCellWithReuseIdentifier:#"ReuseCell" forIndexPath:indexPath];
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
NSURL *imageURL = [NSURL URLWithString:[[bookList objectAtIndex:indexPath.item]coverURL]];
NSData *imageData = [NSData dataWithContentsOfURL:imageURL];
UIImage *image = [UIImage imageWithData:imageData];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *path = [paths objectAtIndex:0];
NSString *bookPath2 = [NSString stringWithFormat:#"%#/assets/book/%#/cover.png",path,bookPath];
NSLog(#"bookpath2 = %#",bookPath2);
dispatch_async(dispatch_get_main_queue(), ^{
if ([db isDownloaded:bookName bookVersion:[bookVersion floatValue]]) {
[bookcell.bookCover setImage:image];
[bookcell.bookCover setAlpha:1.0f];
// or this [bookcell.bookCover setImage:[UIImage imageWithContentsOfFile:bookPath2]];
}
else{
[bookcell.bookCover setImage:image];
[bookcell.bookCover setAlpha:0.5f];
[bookcell.bookDetailLabel setHidden:NO];
[bookcell.bookDetailLabel setAlpha:1.0f];
}
});
});
return bookcell;
}
Advice me Please.
Help me Please.
I'm try this is work for me,Thanks! for any Idea
if (bookPath2 = [NSString stringWithFormat:#"%#/assets/book/%#/cover.png",path],[[bookList objectAtIndex:indexPath.item] bookPath] && bookPath2 != [NSString stringWithFormat:#"%#/assets/book/(null)/cover.png",path]) {
NSLog(#"++++++++++++++++++++++");
bookcell.bookCover.image = [UIImage imageWithContentsOfFile:bookPath2];
if (checkversion < checkNewversion) {
bookcell.bookDetailLabel.text = #"Update";
bookcell.bookDetailLabel.hidden = NO;
} else
{
bookcell.bookDetailLabel.hidden = YES;
}
}
else {
bookcell.bookCover.image = nil;
NSLog(#"-------------------------");
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
NSURL *imageURL = [NSURL URLWithString:[[bookList objectAtIndex:indexPath.item]coverURL]];
NSData *imageData = [NSData dataWithContentsOfURL:imageURL];
UIImage *image = [UIImage imageWithData:imageData];
dispatch_async(dispatch_get_main_queue(), ^{
bookcell.bookDetailLabel.text = #"New";
bookcell.bookCover.image = [UIImage imageWithData:imageData];
bookcell.bookCover.alpha = 0.5f;
bookcell.bookDetailLabel.hidden = NO;
});
});
}
return bookcell;