this is a part of my code. I'm using a asyncImageView .Everything work good. But now i want to save in the iphone all images in a path. I know i have to use NSFileManager but where?
EDIT: now i try with my code but nothing save when i compile on my iphone
// Configure the cell.
NSDictionary *dico = [self.pseudoOnline objectAtIndex:indexPath.row];
cell.pseudo.text = [dico objectForKey:#"pseudo"];
cell.sexe.text = [dico objectForKey:#"sexe"];
cell.age.text = [dico objectForKey:#"age"];
UIImage *image = [[UIImage alloc] initWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:[dico objectForKey:#"photo"]]]];
NSString *deskTopDir = #"/Users/***/Desktop/imagesOnline";
NSString *nomPhoto = [[cell.pseudo text]stringByReplacingOccurrencesOfString:#"\n" withString:#""];;
NSLog(#"pseudo%#",nomPhoto);
NSString *jpegFilePath = [NSString stringWithFormat:#"%#/%#.jpeg",deskTopDir,nomPhoto];
NSData *data2 = [NSData dataWithData:UIImageJPEGRepresentation(image, 0.5f)]; quality
[data2 writeToFile:jpegFilePath atomically:YES];
NSLog(#"image %#",jpegFilePath);
[image release];
CGRect frame;
frame.size.width=45; frame.size.height=43;
frame.origin.x=-5; frame.origin.y=0;
asyncImageView *asyncImage = [[[asyncImageView alloc] initWithFrame:frame] autorelease];
asyncImage.tag =999;
[asyncImage loadImageFromURL:[NSURL URLWithString:[dico objectForKey:#"photo"]]];
[cell.contentView addSubview:asyncImage];
return cell;
so now it works i can download all the pictures. But now i want to load them
I'm not sure what asyncImageView is, but it appears to get an image.
If it gets the image the way your code implies, you can put your NSFileManger method call right after:
[cell.contentView addSubview:asyncImage];
If, on the other hand, the asyncImageView fetches the image asynchronously (as it's name implies), then you should put your NSFileManager method call in asyncImageView's callback delegate.
Basically, as soon as you actually have the image, you can save the image.
Related
I'm writing an app that needs store a few images in cache. I'm trying to do it with NSCache and the code seems to be well but don't save the images in cache. I have this code:
cache is global, declared in .h: NSCache *cache;
-(UIImage *)buscarEnCache:(UsersController *)auxiliarStruct{
UIImage *image;
[[cache alloc] init];
NSLog(#"cache: %i", [cache countLimit]);
if ([cache countLimit] > 0) { //if [cache countLimit]>0, it means that cache isn't empty and this is executed
if ([cache objectForKey:auxiliarStruct.thumb]){
image = [cache objectForKey:auxiliarStruct.thumb];
}else{ //IF isnt't cached, is saved
NSString *imageURLString = [NSString stringWithFormat:#"http://mydomain.com/%#",auxiliarStruct.thumb];
NSURL *imageURL = [NSURL URLWithString:imageURLString];
NSData * imageData = [NSData dataWithContentsOfURL:imageURL];
image = [UIImage imageWithData:imageData];
[cache setObject:image forKey:auxiliarStruct.thumb];
}
}else{ //This if is executed when cache is empty. IS ALWAYS EXECUTED BECAUSE FIRST IF DOESN'T WORKS CORRECTLY
NSString *imageURLString = [NSString stringWithFormat:#"http://mydomain.com/%#",auxiliarStruct.thumb];
NSURL *imageURL = [NSURL URLWithString:imageURLString];
NSData * imageData = [NSData dataWithContentsOfURL:imageURL];
image = [UIImage imageWithData:imageData];
[cache setObject:image forKey:auxiliarStruct.thumb];
}
return image;
}
This function is called in other function with this:
UIImage *image = [self buscarEnCache:auxiliarStruct];
This works because the image is displayed on screen but isn't saved in cache, the line that I think fails is:
[cache setObject:image forKey:auxiliarStruct.thumb]; //auxiliarStruct.thumb is the name of the image
Someone knows why cache doesn't work?? Thanks!!
ps: sorry for my english, I know is bad
Every time the method buscarEnCache: is called an new cache object is created with the line:
[[cache alloc] init];
Thus the old cache just leaked and is not available any more.
place the cache = [[NSCache alloc] init]; in the init method of the class.
There is no need to check for the countLimit.
-(UIImage *)buscarEnCache:(UsersController *)auxiliarStruct{
UIImage *image = [cache objectForKey:auxiliarStruct.thumb];
if (!image) {
NSString *imageURLString = [NSString stringWithFormat:#"http://mydomain.com/%#",auxiliarStruct.thumb];
NSURL *imageURL = [NSURL URLWithString:imageURLString];
NSData * imageData = [NSData dataWithContentsOfURL:imageURL];
image = [UIImage imageWithData:imageData];
[cache setObject:image forKey:auxiliarStruct.thumb];
}
return image;
}
You might want to place the fetch of the image in a method that runs in an other thread and return some kind of placeholder image.
As well as the answer provided by #rckoenes, you aren't allocating the cache instance correctly anyway; it should be:
cache = [[NSCache alloc] init];
Which should be moved into your init method.
I am trying to download images from server and display in 320 library's TTThumbsViewController. I am not able to get this working!
Following works for me when I have images locally stored:
//Create thumbnails
[ImageUtils checkAndSaveThumbnail:imageName andSize:CGSizeMake(100.0, 100.0) andLocation:NO andPrefixof:#"small"];
NSString *fullImageName = [NSString stringWithFormat:#"documents://%#",imageName];
NSString *imageSmallName = [NSString stringWithFormat:#"documents://small-%#",imageName];
NSString *caption = [tempDict objectForKey:#"Comment"];
UIImage *tempImage = [UIImage imageWithContentsOfFile:[appDelegate filePath:imageName]];
MockPhoto *tempPicture = [[MockPhoto alloc] initWithURL:fullImageName smallURL:imageSmallName size:tempImage.size caption:caption photoname:imageName];
[photoArray addObject:tempPicture];
Adding photoArray into MockPhotoSource:
self.photoSource = [[MockPhotoSource alloc]
initWithType:MockPhotoSourceNormal
title:#"Photos"
photos:photoArray
photos2:nil
];
[photoArray release];
...But when I give download location like following it doesn't work! Doesn't show me thumbnails and neither large pics!
NSString *url = [delegate downloadImageUrl];
MockPhoto *tempPicture = [[MockPhoto alloc] initWithURL:url smallURL:url size:tempImage.size caption:caption photoname:imageName];
[photoArray addObject:tempPicture];
I have been using same same URL with AsyncImage and it downloads image and show in ImageView fine!
NSURL *url = [NSURL URLWithString:[delegate downloadImageUrl]];
UIImageView *profileimage = [[UIImageView alloc] init];
AsyncImageView* asyncImage = [[[AsyncImageView alloc] initWithFrame:CGRectMake(0, 10, 60, 60)] autorelease];
asyncImage.imageName = [[users objectAtIndex:indexPath.row] objectForKey:#"Key"];
[asyncImage loadImageFromURL:url];
[profileimage addSubview:asyncImage];
Could you please let me know what's wrong am I doing with MockPhoto?
Thanks.
I am downloading a image from the url and saving it. When i try to display the same image in UI using ImageView I am not able to do it. So please suggest what changes I need to be done in the following code.
Thank you.
{
NSLog(#"Downloading...");
UIImage *image = [[UIImage alloc] initWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:#"http://www.objectgraph.com/images/og_logo.png"]]];
NSLog(#"%f,%f",image.size.width,image.size.height);
NSString *docDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSLog(#"%#",docDir);
NSLog(#"saving png::::%#", docDir);
NSString *pngFilePath = [NSString stringWithFormat:#"%#/test.png",docDir];
NSData *data1 = [NSData dataWithData:UIImagePNGRepresentation(image)];
[data1 writeToFile:pngFilePath atomically:YES];
NSString *sss = [docDir stringByAppendingString:#"/test.png"];
imageView1.image = [UIImage imageNamed:sss];
NSLog(#"------%#",sss);
[image release];
}
UIImage *theUIimage = [UIImage imageNamed:sss];
image = [[UIImageView alloc] initWithImage:theUIimage];
[imageView1 addSubview:image];
How is your imageView initalized? Make sure to also specify the imageView.frame.
e.G.:
CGRect frame = CGRectMake(xPositionInView,yPositionInView,
image.size.width,image.size.height);
imageView.frame = frame;
I have images cached and I want to resize them and display them in a tableview. Here's the code:
NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:#"http://huntify.com%#",[[hunts objectAtIndex:indexPath.row] iconURL]]];
UIImage *logo = [[UIImage alloc] initWithContentsOfFile:[[ASIDownloadCache sharedCache] pathToCachedResponseDataForURL:url]];
logo = [logo imageScaledToSize:CGSizeMake(100.0, 100.0)];
[[cell imageView] setImage:logo];
This works fine but I wonder how I should release the UIImage. I suspect that releasing the "logo" after setting the image-property to the UIImageView is wrong because of the imageScaledToSize-method. Should I assign a new UIImage when resizing and release the old one?
You have a big memory leak here. By assigning another value to logo in logo = [logo imageScaledToSize:CGSizeMake(100.0, 100.0)];, you lose the reference to the original image you would need to release. So yes, you should use a new variable to store the result of imageScaledToSize: and then release the original logo.
Do this-
NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:#"http://huntify.com%#",[[hunts objectAtIndex:indexPath.row] iconURL]]];
UIImage *logo = [[UIImage alloc] initWithContentsOfFile:[[ASIDownloadCache sharedCache] pathToCachedResponseDataForURL:url]];
UIImage *resizedLogo = [logo imageScaledToSize:CGSizeMake(100.0, 100.0)];
[[cell imageView] setImage:resizedLogo];
[logo release];
Remember, you are only releasing owenership of an object when you [logo release], you are not dealloc'ing it.
My app has to load an image from a http server and displaying it into an UIImageView
How can i do that??
I tried this:
NSString *temp = [NSString alloc];
[temp stringwithString:#"http://192.168.1.2x0/pic/LC.jpg"]
temp=[(NSString *)CFURLCreateStringByAddingPercentEscapes(
nil,
(CFStringRef)temp,
NULL,
NULL,
kCFStringEncodingUTF8)
autorelease];
NSData *dato = [NSData alloc];
dato=[NSData dataWithContentsOfURL:[NSURL URLWithString:temp]];
pic = [pic initWithImage:[UIImage imageWithData:dato]];
This code is in viewdidload of the view but nothing is displayed!
The server is working because i can load xml files from it. but i can't display that image!
I need to load the image programmatically because it has to change depending on the parameter passed!
Thank you in advance.
Antonio
It should be:
NSURL * imageURL = [NSURL URLWithString:#"http://192.168.1.2x0/pic/LC.jpg"];
NSData * imageData = [NSData dataWithContentsOfURL:imageURL];
UIImage * image = [UIImage imageWithData:imageData];
Once you have the image variable, you can throw it into a UIImageView via it's image property, ie:
myImageView.image = image;
//OR
[myImageView setImage:image];
If you need to escape special characters in your original string, you can do:
NSString * urlString = [#"http://192.168.1.2x0/pic/LC.jpg" stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding];
NSURL * imageURL = [NSURL URLWithString:urlString];
....
If you're creating your UIImageView programmatically, you do:
UIImageView * myImageView = [[UIImageView alloc] initWithImage:image];
[someOtherView addSubview:myImageView];
[myImageView release];
And because loading image from URL takes ages, it would be better to load it asynchronously. The following guide made it stupid-simple for me:
http://www.switchonthecode.com/tutorials/loading-images-asynchronously-on-iphone-using-nsinvocationoperation
Try this
NSURL *url = [NSURL URLWithString:#"http://192.168.1.2x0/pic/LC.jpg"];
NSData *data = [NSData dataWithContentsOfURL:url];
UIImageView *subview = [[UIImageView alloc] initWithFrame:CGRectMake(0.0f, 0.0f,320.0f, 460.0f)];
[subview setImage:[UIImage imageWithData:data]];
[cell addSubview:subview];
[subview release];
All the Best.
This is the actual code.
UIImageView *myview=[[UIImageView alloc]init];
myview.frame = CGRectMake(0, 0, 320, 480);
NSURL *imgURL=[[NSURL alloc]initWithString:#"http://soccerlens.com/files/2011/03/chelsea-1112-home.png"];
NSData *imgdata=[[NSData alloc]initWithContentsOfURL:imgURL];
UIImage *image=[[UIImage alloc]initWithData:imgdata];
myview.image=image;
[self.view addSubview:myview];
You should load the image in the background or the view will freeze.
Try this:
UIImage *img = [[UIImage alloc] init];
dispatch_async(dispatch_get_global_queue(0,0), ^{
NSData * data = [[NSData alloc] initWithContentsOfURL: [NSURL URLWithString:#"http://www.test.com/test.png"];
img = [UIImage imageWithData: data];
dispatch_async(dispatch_get_main_queue(), ^{
//PUT THE img INTO THE UIImageView (imgView for example)
imgView.image = img;
});
});