I am attempting to use this method I've constructed to save the layer of a UIWebView as an image. That is working but the SVG I have loaded into the UIView is not getting rendered in the image, only the background of the UIWebView.
+ (BOOL)imageFromSVGinWebView:(UIView *)theView usePNG:(BOOL)usePNG; {
UIGraphicsBeginImageContext(theView.frame.size);
[theView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *layerImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
NSData *layerIMGData = nil;
NSString *pathComponent = nil;
if (usePNG) {
layerIMGData = UIImagePNGRepresentation(layerImage);
pathComponent = #"png";
}else {
layerIMGData = UIImageJPEGRepresentation(layerImage,1.0f);
pathComponent = #"jpg";
}
NSString *appFile = [[CCFileManagement conversionsDirectory] stringByAppendingPathComponent:String(#"img.%#",pathComponent)];
NSError *error = nil;
BOOL returnBOOL = [layerIMGData writeToFile:appFile options:NSDataWritingAtomic error:&error];
if(error != nil)
ILogPlus(#"%#",error);
return returnBOOL;
}
In summary, I've loaded an SVG into a UIWebView, saved that UIWebView as an image, opened the image and the image does not have the SVG in it. I have done this with other views successfully, something is different about the SVG or UIWebView.
UPDATE:
If I add a delay to make the app wait a few seconds to execute the image saving code then it works. Putting that code in webViewDidFinishLoad does NOT work. Obviously webViewDidFinishLoad doesn't count SVGs.
I have found that if you add a .1 second delay it will work
- (void)webViewDidFinishLoad:(UIWebView *)webView; {
[self performSelector:#selector(postLoadActions:) withObject:webView afterDelay:0.1f];
}
- (void)postLoadActions:(UIWebView *)webView; {
if (![CCConversion imageFromSVGinWebView:webView usePNG:YES]) {
ILogPlus(#"Didn't work");
}
NSArray *array = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:[CCFileManagement conversionsDirectory] error:NULL];
ILogPlus(#"%#",array);
//[webView removeFromSuperview];
[webView release];
UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageWithContentsOfFile:[[CCFileManagement conversionsDirectory] stringByAppendingPathComponent:#"img.png"]]];
imageView.frame = CGRectMake(90, 90, imageView.frame.size.width, imageView.frame.size.height);
imageView.backgroundColor = [UIColor clearColor];
[self.view performSelector:#selector(addSubview:) withObject:imageView afterDelay:2.0f];
[imageView release];
}
Related
I get this error when loading multi images from disk. I used SDWebImage to load image but still get this error then app crashed. I dont know what this error is. Pls give me adivse. Thanks much.
Communications error: <OS_xpc_error: <error: 0x322eb614> { count = 1, contents =
"XPCErrorDescription" => <string: 0x322eb86c> { length = 22, contents = "Connection interrupted" }
}>
Here is the code I used to create the list thumbnail for scrollview
-(void) createPropertyThumbnails:(NSArray*) array
{
int xCoord=10;
int yCoord=7;
int buffer = 7;
for (int pos = 0; pos < array.count; pos++) {
// CREATE VIEW CONTAINS UIIMAGEVIEW HERE
ThumbnailView* thumbnaiCell = [[humbnailView alloc] initWithFrame:CGRectMake(xCoord, yCoord,THUMBNAIL_WIDTH , THUMBNAIL_HEIGHT) andURLImage:array[pos]];
thumbnaiCell.delegate = self;
//set selected for 1st item
if(pos ==0)
{
_selectedCell =thumbnaiCell;
[_selectedCell setSelectedCell:YES];
}
xCoord = xCoord + THUMBNAIL_WIDTH + buffer;
[self.thumbnailScrollView addSubview:thumbnaiCell];
}
[self.thumbnailScrollView setContentSize:CGSizeMake(xCoord, self.thumbnailScrollView.frame.size.height)];
}
- (id)initWithFrame:(CGRect)frame andURLImage:(NSString*) url
{
self = [super initWithFrame:frame];
if (self) {
[self setupProjectThumbnail:frame andURLImage:url];
}
return self;
}
-(void) setupProjectThumbnail:(CGRect) frame andURLImage:(NSString*) url
{
//create load image from cache
NSString *filePath = [[NSBundle mainBundle] pathForResource:url ofType:nil];
NSURL *ImageURL = [NSURL fileURLWithPath:filePath];
if (ImageURL) {
SDWebImageManager *manager = [SDWebImageManager sharedManager];
[manager downloadImageWithURL:ImageURL
options:0
progress:^(NSInteger receivedSize, NSInteger expectedSize) {
// progression tracking code
}
completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, BOOL finished, NSURL *imageURL) {
if (image) {
// do something with image
// imageview
UIImageView* imageview = [[UIImageView alloc] initWithFrame:CGRectMake(0.0, 0.0, frame.size.width, frame.size.height)];
imageview.contentMode = UIViewContentModeScaleToFill;
[self addSubview:imageview];
}
}];
}
}
My Requirement is download all images in application memory and display it from local if its available.
Below is my code to access image from local and if its not available then it will download then display.
[cell.imgProfilePic processImageDataWithURLString:cData.PICTURE];
I have made custom UIImageView class
DImageView.h
#import <UIKit/UIKit.h>
#interface DImageView : UIImageView
#property (nonatomic, strong) UIActivityIndicatorView *activityView;
- (void)processImageDataWithURLString:(NSString *)urlString;
+ (UIImage *)getSavedImage :(NSString *)fileName;
#end
DImageView.m
#import "DImageView.h"
#define IMAGES_FOLDER_NAME #"DImages"
#implementation DImageView
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self)
{ }
return self;
}
- (void)dealloc
{
self.activityView = nil;
[super dealloc];
}
- (id)initWithCoder:(NSCoder *)aDecoder
{
self = [super initWithCoder:aDecoder];
if (self)
{
[self initWithFrame:[self frame]];
}
return self;
}
- (void)processImageDataWithURLString:(NSString *)urlString
{
#autoreleasepool
{
UIImage * saveImg =[DImageView getSavedImage:urlString];
if (saveImg)
{
#autoreleasepool
{
dispatch_queue_t callerQueue = dispatch_get_main_queue();
dispatch_async(callerQueue, ^{
#autoreleasepool{
[self setImage:saveImg];
}
});
}
}
else
{
[self showActivityIndicator];
NSURL *url = [NSURL URLWithString:[urlString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
dispatch_queue_t callerQueue = dispatch_get_main_queue();
dispatch_queue_t downloadQueue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH,0);
__block NSError* error = nil;
dispatch_async(downloadQueue, ^{
#autoreleasepool
{
NSData * imageData = [NSData dataWithContentsOfURL:url options:NSDataReadingUncached error:&error];
if (!error)
{
dispatch_async(callerQueue, ^{
#autoreleasepool {
UIImage *image = [UIImage imageWithData:imageData];
[self setImage:image];
[self hideActivityIndicator];
[self saveImageWithFolderName:IMAGES_FOLDER_NAME AndFileName:urlString AndImage:imageData];
}
});
}
}
});
dispatch_release(downloadQueue);
}
}
}
- (void) showActivityIndicator
{
self.activityView = [[UIActivityIndicatorView alloc]initWithFrame:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
self.activityView.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleBottomMargin;
self.activityView.hidesWhenStopped = TRUE;
self.activityView.backgroundColor = [UIColor clearColor];
self.activityView.activityIndicatorViewStyle = UIActivityIndicatorViewStyleGray;
[self addSubview:self.activityView];
[self.activityView startAnimating];
}
- (void) hideActivityIndicator
{
CAAnimation *animation = [NSClassFromString(#"CATransition") animation];
[animation setValue:#"kCATransitionFade" forKey:#"type"];
animation.duration = 0.4;;
[self.layer addAnimation:animation forKey:nil];
[self.activityView stopAnimating];
[self.activityView removeFromSuperview];
for (UIView * view in self.subviews)
{
if([view isKindOfClass:[UIActivityIndicatorView class]])
[view removeFromSuperview];
}
}
- (void)saveImageWithFolderName:(NSString *)folderName AndFileName:(NSString *)fileName AndImage:(NSData *) imageData
{
#autoreleasepool{
NSFileManager *fileManger = [[NSFileManager defaultManager] autorelease];
NSString *directoryPath = [[NSString stringWithFormat:#"%#/%#",[DImageView applicationDocumentsDirectory],folderName] autorelease];
if (![fileManger fileExistsAtPath:directoryPath])
{
NSError *error = nil;
[fileManger createDirectoryAtPath:directoryPath withIntermediateDirectories:YES attributes:nil error:&error];
}
fileName = [DImageView fileNameValidate:fileName];
NSString *filePath = [[NSString stringWithFormat:#"%#/%#",directoryPath,fileName] autorelease];
BOOL isSaved = [imageData writeToFile:filePath atomically:YES];
if (!isSaved)DLog(#" ** Img Not Saved");
}
}
+ (NSString *)applicationDocumentsDirectory
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *basePath = ([paths count] > 0) ? [paths objectAtIndex:0] : nil;
return basePath;
}
+ (UIImage *)getSavedImage :(NSString *)fileName
{
NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
fileName = [DImageView fileNameValidate:fileName];
NSFileManager * fileManger = [[NSFileManager defaultManager] autorelease];
NSString * directoryPath = [[NSString stringWithFormat:#"%#/%#",[DImageView applicationDocumentsDirectory],IMAGES_FOLDER_NAME] autorelease];
NSString * filePath = [[NSString stringWithFormat:#"%#/%#",directoryPath,fileName] autorelease];
if ([fileManger fileExistsAtPath:directoryPath])
{
UIImage *image = [[[UIImage imageWithContentsOfFile:filePath] retain]autorelease];
if (image)
return image;
else
return nil;
}
[pool release];
return nil;
}
+ (NSString*) fileNameValidate : (NSString*) name
{
name = [name stringByReplacingOccurrencesOfString:#"://" withString:#"##"];
name = [name stringByReplacingOccurrencesOfString:#"/" withString:#"#"];
name = [name stringByReplacingOccurrencesOfString:#"%20" withString:#""];
return name;
}
#end
Everything is working fine with smooth scrolling as well as asyncImage download in background.
The issue is when i scroll UITableview application memory is continuously increase and after some time i got Receive memory waring 2/3 time then application crash.
When i use AsyncImageView class that time memory not increase and its working fine. But due to app requirement i saved all images to Document Directory and display from it if its available.
i have tried with #autoreleasepool and release some variable but not getting success.
I appreciated if any one have the solution to manage memory management.
**ARC is off in my application.**
It's possible that UIImagePNGRepresentation returns non-autoreleased object - you can try to release it and see if that results in a crash. Obviously you are not releasing something, but nothing other than the image representation appears obvious.
A few other comments:
run your app in Instruments, using the ObjectAlloc tool, and it should be immediately obvious what objects are not dealloced. If you don't know Instruments, well, its time now to learn it.
you can 'track' objects and get a message when they are dealloced using ObjectTracker - however it was designed for ARC so you may need to tweak it. If you use it you would see a message when each of your objects are dealloced
when the table view is done with a cell, there is a delegate method that you can receive that tells you so, and you can then nil (release) and objects the cell retains
your use of downloadQueue is bizarre - create it once in your instance as an ivar, use it as you need, and in dealloc release it
you hide the activity spinner on the main queue, but don't start it on the main queue
you command the activity view to remove itself from its superview, but then look for in in the subviews and try to remove it there:
[self.activityView removeFromSuperview];
for (UIView * view in self.subviews)
{
if([view isKindOfClass:[UIActivityIndicatorView class]])
[view removeFromSuperview];
}
In the end, Instruments is what you want. You can read up more about it here, or just google and you will surely find a slew of blogs to read.
Yes Finally i have resolved it.
The code which is in Question is working fine now. but Without release some objects and #autoreleasepool block which is in code, memory was increase continuously during scroll UITableView.
From the Instrument i found that memory increase in UILableView and UIImageView. I am using Custom UITableViewCell and in that file i havnt implement dealloc method. So When i have implement dealloc method in UITableViewCell .m file and release & nil all object.
After that memory not increase during scroll TableView and its Resolved the issue.
As per my Understanding there is an issue in your "getSavedImage" Method you have to manage memory Manually instead of 'autorelease' so as My suggestion is use
UIImage *image = [[UIImage alloc] initWithContentsOfFile:filePath]
and also release it after use of it. means after '[self setImage:saveImg];'
[saveImg release]
instead of this.
[[UIImage imageWithContentsOfFile:filePath] retain];
'Don't Use Autorelease because it has staying in memory until pool not drain' and just because of this you got an memory issue.
Is there a way to get the filesize in KB from a UIImage, without getting that image from didFinishPickingMediaWithInfo? The images that are presented are coming from the photo album.
I tried the following code, but this gives the following result: size of image in KB: 0.000000
- (void)setImage:(UIImage *)image
{
_image = image;
self.imageView.image = image;
}
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
[self setupView];
self.backgroundColor = [UIColor whiteColor];
panGestureRecognizer = [[UIPanGestureRecognizer alloc]initWithTarget:self action:#selector(beingDragged:)];
[self addGestureRecognizer:panGestureRecognizer];
// prepare image view
self.imageView = [[UIImageView alloc]initWithFrame:self.bounds];
self.imageView.clipsToBounds = YES;
self.imageView.contentMode = UIViewContentModeScaleAspectFill;
[self addSubview:self.imageView];
NSData *imgData = [[NSData alloc] initWithData:UIImageJPEGRepresentation((_image), 0.5)];
int imageSize = imgData.length;
NSLog(#"size of image in KB: %f ", imageSize/1024.0);
overlayView = [[OverlayView alloc]initWithFrame:CGRectMake(self.frame.size.width/2-100, 0, 100, 100)];
overlayView.alpha = 0;
[self addSubview:overlayView];
}
return self;
}
Here is an example of calculating file sizes of files in your HomeDirectory or Documents:
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:#"yourimagename.png"]
File sie is calculated:
filesize = [[[NSFileManager defaultManager] attributesOfItemAtPath:filePath error:nil] fileSize];
NSLog(#"%lld",filesize);
Before you do that add filesize, you can add it in the .m file
#interface ViewController () {
long long filesize;
}
this will result in bytes, if you are trying to convert those bytes into kb you can use the NSByteCountFormatter and it will take care of all the math for you:
NSByteCountFormatter *sizeFormatter = [[NSByteCountFormatter alloc] init];
sizeFormatter.countStyle = NSByteCountFormatterCountStyleFile;
and then call it like so :
[sizeFormatter stringFromByteCount:filesize]
If the image is not saved on the disk you can calculate the size this way:
NSData *imgData = UIImageJPEGRepresentation(_image, 1);
filesize = [imgData length]; //filesize in this case will be an int not long long so use %d to NSLog it
initWithFrame: runs before setImage: is called, so _image is nil at the time you are doing your calculations. You could move them into the setImage: function...
However, this is a weird way of measuring the size of the image. A JPEG file and what ends up in graphics memory are widely different, so if you are doing it for profiling reasons, this is not going to give you any accurate measurements. If you just want the size on disk, you can simply check that through NSFileManager.
NSInteger imageDataSize = CGImageGetHeight(image.CGImage) * CGImageGetBytesPerRow(image.CGImage);
I have a Gif in a UIWebView, but when the animation ends, it stops.
How I can do to never stop?
This is my code:
self.video is my UiWebView
my gif is videoGif.gif
- (void)viewDidLoad
{
[super viewDidLoad];
self.video.delegate=self;
NSString *filePath = [[NSBundle mainBundle] pathForResource:#"videoGif" ofType:#"gif"];
NSData *gif = [NSData dataWithContentsOfFile:filePath];
[self.video loadData:gif MIMEType:#"image/gif" textEncodingName:nil baseURL:nil];
self.video.userInteractionEnabled = NO;
self.video.scalesPageToFit=YES;
self.video.contentMode = UIViewContentModeScaleAspectFit;
}
-(void)webViewDidFinishLoad:(UIWebView *)webView
{
self.video.scalesPageToFit=YES;
self.video.contentMode = UIViewContentModeScaleAspectFit;
}
Thanks!!
You can you use UIView Animations. Here i use UIButton for animation. It may be and alternative way. Here my code:
NSMutableArray *imageArray=[NSMutableArray new];
for(int i=1;i<=16;i++){
[imageArray addObject:[UIImage imageNamed:[NSString stringWithFormat:#"win_%d.png",i]]];
}
[animatedButton setImage:[UIImage imageNamed:#"win_1.png"] forState:UIControlStateNormal];
[animatedButton.imageView setAnimationImages:[imageArray copy]];
animatedButton.imageView.animationDuration = .50;
[animatedButton.imageView startAnimating];
UPDATE #1: forgot to mention this is running on an iPad app
This is my revised code (still not working, but got rid of the unnecessary code):
NSURL *tmpDirURL = [NSURL fileURLWithPath:NSTemporaryDirectory() isDirectory:YES];
NSURL *fileURL = [[tmpDirURL URLByAppendingPathComponent:#"custImage"] URLByAppendingPathExtension:#"png"];
NSError*writeError = nil;
[client.aClientImage writeToURL:fileURL options:0 error:&writeError];
NSAssert(writeError==nil, writeError);
// write appointment info
NSString *htmlString;
if(client.aClientEMail.length > 0) {
htmlString = [NSString stringWithFormat:NSLocalizedString(#"HTML_STRING1",nil),
client.aClientFirstName,
client.aClientLastName,
client.aClientEMail.length == 0? #"": client.aClientEMail,
client.aClientPrimaryPhone,
apptSelected.aServices,
fileURL];
}
else {
htmlString = [NSString stringWithFormat:NSLocalizedString(#"HTML_STRING2",nil),
client.aClientFirstName,
client.aClientLastName,
client.aClientPrimaryPhone,
apptSelected.aServices,
fileURL];
}
When I look at custImage in the XCode debugger, I see a different image from the previous image, which is correct. However, when it gets time to display the image at fileURL, it's a totally different image than custImage and is the same image that was displayed the first time!
UPDATE #2: I have figured out that fileURL has the correct image, but it is NOT being written to the device the second time (the first image is not being replaced).
UPDATE #3: this is the contents of htmlString that is displayed in the UIWebView popover:
<html><head><style type="text/css"> body {font-family: "Verdana"; font-size: 12;} </style></head><body>
<h2>Rolf Marsh</h2><p>phone: 213-555-1234<p>services: Art, Decals<p><img src="file:///private/var/mobile/Applications/FEE7159E-1FF8-4B94-A446-2A4C72E0AD41/tmp/custImage.png"/></body></html>
Any suggestions on how to fix this?
you never write the data to disk as far as I can see.
Only in the commented out section you attempt to.
Write it in between:
NSURL *tmpDirURL = [NSURL fileURLWithPath:NSTemporaryDirectory() isDirectory:YES];
NSURL *fileURL = [[tmpDirURL URLByAppendingPathComponent:#"custImage"] URLByAppendingPathExtension:#"png"];
//write
NSError*writeError = nil;
[client.aClientImage writeToURL:fileURL options:0 error:&writeError];
NSAssert(writeError==nil, writeError);
//read / use in the html or so
...
Dont forget to reload the web view or whatever you use to show the html
I figured it out... for others that are having the same problem, here is the code that works. Notice that I do NOT save it to a temporary file, since I already have the image in the Core Data entity. Here's the code:
-(void) showExistingAppointmentDetails: (AppointmentInfo *) apptSelected {
// make rectangle to attach popover
CGRect rectangle = CGRectMake( [apptSelected.aPosX floatValue], [apptSelected.aPosY floatValue],
[apptSelected.aPosW floatValue], [apptSelected.aPosH floatValue]);
// see if this is for staff; if so, don't display anything
if([apptSelected.aApptKey isEqual: #"Staff"])
return;
NSPredicate *predicate = ([NSPredicate predicateWithFormat: #"aClientKey == %#", apptSelected.aApptKey ]); // was aApptKey
ClientInfo *client = [ClientInfo MR_findFirstWithPredicate:predicate inContext:localContext];
UIImage *image = [UIImage imageWithData:client.aClientImage]; // image is good <---------
// write appointment info into html string
NSString *htmlString;
if(client.aClientEMail.length > 0) {
htmlString = [NSString stringWithFormat:NSLocalizedString(#"HTML_STRING1",nil),
client.aClientFirstName,
client.aClientLastName,
client.aClientEMail.length == 0? #"": client.aClientEMail,
client.aClientPrimaryPhone,
apptSelected.aServices,
[self htmlForPNGImage:image]];
}
else {
htmlString = [NSString stringWithFormat:NSLocalizedString(#"HTML_STRING2",nil),
client.aClientFirstName,
client.aClientLastName,
client.aClientPrimaryPhone,
apptSelected.aServices,
[self htmlForPNGImage:image]];
}
UIViewController* popoverContent = [[UIViewController alloc] init];
UIView* popoverView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 250, 300)];
popoverView.backgroundColor = [UIColor colorWithWhite:(CGFloat)1.0 alpha:(CGFloat)1.0]; // frame color?
popoverContent.view = popoverView;
//resize the popover view shown in the current view to the view's size
popoverContent.contentSizeForViewInPopover = CGSizeMake(250, 300);
// add the UIWebView for RichText
UIWebView *webView = [[UIWebView alloc] initWithFrame:popoverView.frame];
webView.backgroundColor = [UIColor whiteColor]; // change background color here
// add the webView to the popover
[webView loadHTMLString:htmlString baseURL:[NSURL URLWithString:nil]];
[popoverView addSubview:webView];
// if previous popoverController is still visible... dismiss it
if ([popoverController isPopoverVisible]) {
[popoverController dismissPopoverAnimated:YES];
}
//create a popover controller
popoverController = [[UIPopoverController alloc] initWithContentViewController:popoverContent];
[popoverController presentPopoverFromRect:rectangle inView:self
permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
}
- (NSString *) htmlForPNGImage:(UIImage *) image {
NSData *imageData = UIImagePNGRepresentation(image);
NSString *imageSource = [NSString stringWithFormat:#"data:image/png;base64,%#",[imageData base64Encoding]];
return [NSString stringWithFormat:#"%#", imageSource];
}