Using this code I am trying to resize the selected image and then want to save it to a specific path:
-(void)processImage:(NSString*)inputPath:(int)imageWidth:(int)imageHeight:(NSString*)outputPath {
NSImage * img = [NSImage imageNamed:inputPath];
[img setSize: NSMakeSize(imageWidth,imageHeight)];
}
-(void)startProcessingImages {
int i; // Loop counter.
// Loop through all the files and process them.
for( i = 0; i < [files count]; i++ )
{
inputFilePath = [[files objectAtIndex:i] retain];
NSLog(#"filename::: %#", inputFilePath);
// Do something with the filename.
[selectedFile setStringValue:inputFilePath];
NSLog(#"selectedFile:::: %#", selectedFile);
}
NSLog(#"curdir:::::%#", inputFilePath);
NSString *aString = [[NSString stringWithFormat:#"%#%#%#", thumbnailDirPath , #"/" , fileNameNumber] retain];
fileNameJPG = [[aString stringByAppendingString:#".jpg"] retain];
[self processImage:inputFilePath: 66 :55 :thumbnailDirPath];
[self processImage:inputFilePath: 800 :600 :thumbnailDirPath];
[self processImage:inputFilePath: 320 :240 :thumbnailDirPath];
}
My issue is I am not getting that how to save it to thumbnailDirPath.
NSDictionary *options = [NSDictionary dictionaryWithObject:[NSNumber numberWithFloat:0.8] forKey:NSImageCompressionFactor];
NSData *tiffData = [img TIFFRepresentation];
NSData *JPEGData = [[NSBitmapImageRep imageRepWithData:tiffData] representationUsingType:NSJPEGFileType properties:options];
NSError *anError;
if (![JPEGData outputPath options:0 error:&anError])
MyLog(#"Error saving image: %# to: %#", anError, outputPath);
Check the documentation for NSJPEGFileType as it will show you the other foramt options for saving, such as PNG.
you should do export your image into file.
currently I only see how to store the TIFF image.
[[img TIFFRepresentation] writeToFile:outputPathName atomacally:NO];
Where outputPathName is the path with file name for your thumbnail file.
Related
I want to get a NSArray with all the UIImage from a Live Photo to create a GIF of that. I tried to make screenshots while animating the live photo but it doesn't work.
Can anyone help me?
Thanks!
First step, you need convert a Live Photo to Video, using this:
PHAssetResourceManager.defaultManager().writeDataForAssetResource(assetRes,
toFile: fileURL, options: nil, completionHandler:
{
// Video file has been written to path specified via fileURL
}
Finally, using this library to convert this to GIF, or you can search in google for another way: https://github.com/NSRare/NSGIF
Hope this will help you.
This is what I did to achieve the same thing as you requested.
PHFetchOptions *options = [[PHFetchOptions alloc] init];
options.sortDescriptors = #[[NSSortDescriptor sortDescriptorWithKey:#"creationDate" ascending:NO]];
options.predicate = [NSPredicate predicateWithFormat:#"mediaType == %d", PHAssetMediaTypeImage];
options.predicate = [NSPredicate predicateWithFormat:#"mediaSubtype == %d", PHAssetMediaSubtypePhotoLive];
options.includeAllBurstAssets = NO;
PHFetchResult *allLivePhotos = [PHAsset fetchAssetsWithOptions:options];
NSLog(#"Get total live count : %ld",(unsigned long)allLivePhotos.count);
NSMutableArray *arrAllLiveImagesGroups = [NSMutableArray array];
for (PHAsset *asset in allLivePhotos) {
[asset requestContentEditingInputWithOptions:nil
completionHandler:^(PHContentEditingInput *contentEditingInput, NSDictionary *info) {
NSURL *urlMov = [contentEditingInput.livePhoto valueForKey:#"videoURL"];
NSMutableArray *arrLive = [NSMutableArray array];
NSMutableArray *arrSingleLiveImagesGroup = [NSMutableArray array];
AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:urlMov options:nil];
AVAssetImageGenerator *generator = [[AVAssetImageGenerator alloc] initWithAsset:asset];
generator.requestedTimeToleranceAfter = kCMTimeZero;
generator.requestedTimeToleranceBefore = kCMTimeZero;
for (Float64 i = 0; i < CMTimeGetSeconds(asset.duration) * 5 ; i++){
#autoreleasepool {
CMTime time = CMTimeMake(i, 5);
NSError *err;
CMTime actualTime;
CGImageRef image = [generator copyCGImageAtTime:time actualTime:&actualTime error:&err];
UIImage *generatedImage = [[UIImage alloc] initWithCGImage:image scale:1.0 orientation:UIImageOrientationDown];
[arrLive addObject:generatedImage];
CGImageRelease(image);
}
}
[arrSingleLiveImagesGroup addObject:arrLive];
[arrAllLiveImagesGroups addObject:arrSingleLiveImagesGroup];
}];
}
I have a requirement of streaming from server and displaying the streamed content on the screen...Streaming is working fine using NSStream, and NSInputStream and NSOutputStream.How can I display it on the screen?
Stream used looks like #"http://191.168.143.41:1212/;
if(stream == inputStream) {
uint8_t buf[1024];
unsigned int len = 0;
len = [inputStream read:buf maxLength:1024];
if(len > 0) {
NSMutableData* datas=[[NSMutableData alloc] initWithLength:0];
[datas appendBytes: (const void *)buf length:len];
NSString *s = [[NSString alloc] initWithData:datas encoding:NSASCIIStringEncoding];
[self readIn:s];
NSLog(#"ss%#",s);
[self loadMovie:s]; //method for movie player
}
I tried to display this is in a movieplayer as below..
-(void_loadMovie:(NSString*)moviePrefix
{
NSString *path = [NSString stringWithFormat:#"%#.mjpg", moviePrefix];
NSURL *url = [NSURL fileURLWithPath:path];
if (url) {
_moviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:url];
_moviePlayer.view.frame = CGRectMake(0, 70, 600, 450);
_moviePlayer.controlStyle = MPMovieControlStyleNone;
_moviePlayer.scalingMode = MPMovieScalingModeNone;
[dic setObject:__moviePlayer forKey:path];
}
}
[_moviePlayer prepareToPlay];
[self.view addSubview: _moviePlayer.view];
[self.view bringSubviewToFront:_moviePlayer.view];
[self.view addSubview: _moviePlayer.view];
[_moviePlayer play];
}
Is NSString *path = [NSString stringWithFormat:#"%#.mjpg", moviePrefix]; correct way??
This displays a black screen.What is wrong?
If this way is not correct,Is there any other way I can display those frames?
Can anyone help me to solve this...
MJPEG are only JPEG sent one after the other.
I worked a few years ago on this.
On a version of iOS (iOS5?), it was easily read with a UIWebView, but an update of iOS broke all this. This broke all my current work.
Maybe a UIWebView could do the trick today again (fix).
Anyway, since it's just bunch of JPEG, you could just read the JPG (detect start/end of JPG file), create the JPG image and show it in a UIImageView.
A work around (not tested), but you should get the whole idea:
//Properties
#property (nonatomic, strong) NSMutableData *data;
#property (nonatomic, weak) IBOutlet UIImageView *streamImageView;
//Initialize somewhere
_data = [[NSMutableData alloc] init];
//In the stream delegate method:
//Start JPG: FFD8 — End JPG: FFD9
UInt8 startJPEGBytes[2];
startJPEGBytes[0] = 0xFF;
startJPEGBytes[1] = 0xD8;
NSData *startData = [NSData dataWithBytes:&startJPEGBytes length:2];
UInt8 endJPEGBytes[2];
endJPEGBytes[0] = 0xFF;
endJPEGBytes[0] = 0xD9;
NSData *endData = [NSData dataWithBytes:&endJPEGBytes length:2];
[_data appendBytes: (const void *)buf length:len];
NSRange startRange = [_data rangeOfData:startData options:0 range:NSMakeRange(0, [_data length])];
if (startRange.location != NSNotFound) //We found the start of a JPEG
{
NSRange endRange = [_data rangeOfData:endData options:0 range:NSMakeRange(startRange.location, [_data length]-startRange.location)];
if (endRange.location != NSNotFound) //We found the end of a JPEG
{
NSRange imageRange = NSMakeRange(startRange.location, endRange.location+endRange.length-startRange.location);
NSData *imageData = [_data subDataWithRange: imageRange];
streamImage = [UIImage imageWithData:imageData];
[_streamImageView setImage:streamImage];
[_data replaceBytesInRange:NSMakeRange(0, imageRange.location+imageRange.length withBytes:NULL length:0]; //We remove the start till the end of JPEG frame. Start at 0, since there could be garbage at the start.
}
}
You are not adding moviePrefix to the string
NSString *path = [NSString stringWithFormat:#".mjpg", moviePrefix, #"movie"];
Change it to
NSString *path = [NSString stringWithFormat:#"%#.mjpg", moviePrefix, #"movie"];
https://github.com/horsson/mjpeg-iphone/tree/55251a85e2c2489014036ddf5a491783f9b1962d
Used this to get the stream and display.It works
I'm very new to programming, and I jumped right into a project (I know thats not the smartest thing to do, but I'm learning as I go). The app that I'm writing has 10 UIImageViews that display a picture from the users camera roll. The code I'm using needs each of the UIImageViews to have tags. I'm currently using NSData to save the array images, and it works great, but I can't use this method anymore because NSData doesn't support the use of tags. I also can't use NSUserDefaults, because I can't save images to a plist. Here is how I'm attempting to do this (using the NSData method, which works but I have to edit this so that my tags work.)
This is my current code:
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)img editingInfo:(NSDictionary *)editInfo {
if (imageView.image == nil) {
imageView.image = img;
[self.array addObject:imageView.image];
[picker dismissModalViewControllerAnimated:YES];
[self.popover dismissPopoverAnimated:YES];
return;
}
if (imageView2.image == nil) {
imageView2.image = img;
NSLog(#"The image is a %#", imageView);
[self.array addObject:imageView2.image];
[picker dismissModalViewControllerAnimated:YES];
[self.popover dismissPopoverAnimated:YES];
return;
}
...
- (void)applicationDidEnterBackground:(UIApplication*)application {
NSLog(#"Image on didenterbackground: %#", imageView);
[self.array addObject:imageView.image];
[self.array addObject:imageView2.image];
[self.user setObject:self.array forKey:#"images"];
[user synchronize];
}
- (void)viewDidLoad
{
self.user = [NSUserDefaults standardUserDefaults];
NSLog(#"It is %#", self.user);
self.array = [[self.user objectForKey:#"images"]mutableCopy];
imageView.image = [[self.array objectAtIndex:0] copy];
imageView2.image = [[self.array objectAtIndex:1] copy];
UIApplication *app = [UIApplication sharedApplication];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(applicationDidEnterBackground:)
name:UIApplicationDidEnterBackgroundNotification
object:app];
[super viewDidLoad];
}
Any help or suggestions on how to edit this code so that I can save the images, while using tags is much appreciated, thanks!
EDIT: Here is my updated code:
-(IBAction)saveButtonPressed:(id)sender {
NSString *docsDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES) objectAtIndex:0];
for (UIImageView *imageView in self.array) {
NSInteger tag = self.imageView.tag;
UIImage *image = self.imageView.image;
NSString *imageName = [NSString stringWithFormat:#"Image%i.png",tag];
NSString *imagePath = [docsDir stringByAppendingPathComponent:imageName];
[UIImagePNGRepresentation(image) writeToFile:imagePath atomically:YES];
}
NSLog(#"Saved Button Pressed");
}
- (void)applicationDidEnterBackground:(UIApplication*)application {
}
-(void)viewDidLoad {
NSString *docsDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES) objectAtIndex:0];
NSArray *docFiles = [[NSFileManager defaultManager]contentsOfDirectoryAtPath:docsDir error:NULL];
for (NSString *fileName in docFiles) {
if ([fileName hasSuffix:#".png"]) {
NSString *fullPath = [docsDir stringByAppendingPathComponent:fileName];
UIImage *loadedImage = [UIImage imageWithContentsOfFile:fullPath];
if (!imageView.image) {
imageView.image = loadedImage;
} else {
imageView2.image = loadedImage;
}
}
}
}
You need to use "Fast Enumeration" to parse the array's objects, and write each object to disk sequentially. First, you're going to need to add the UIImageView objects to the array instead of the UIImage property of the UIImageView, so you can recover the tag. So instead of writing
[self.array addObject:imageView.image];
It will be
[self.array addObject:imageView];
Try to follow along with my code. I inserted comments on each line to help.
-(void)applicationDidEnterBackground:(UIApplication *)application {
//Obtain the documents directory
NSString *docsDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainmask,YES) objectAtIndex:0];
//begin fast enumeration
//this is special to ObjC: it will iterate over any array one object at a time
//it's easier than using for (i=0;i<array.count;i++)
for (UIImageView *imageView in self.array) {
//get the imageView's tag to append to the filename
NSInteger tag = imageView.tag;
//get the image from the imageView;
UIImage *image = imageView.image;
//create a filename, in this case "ImageTAGNUM.png"
NSString *imageName = [NSString stringWithFormat:#"Image%i.png",tag];
//concatenate the docsDirectory and the filename
NSString *imagePath = [docsDir stringByAppendingPathComponent:imageName];
[UIImagePNGRepresentation(image) writeToFile:imagePath atomically:YES];
}
}
To load the images from disk, you'll have to look at your viewDidLoad method
-(void)viewDidLoad {
//get the contents of the docs directory
NSString *docsDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainmask,YES) objectAtIndex:0];
//Get the list of files from the file manager
NSArray *docFiles = [[NSFileManager defaultManager]contentsOfDirectoryAtPath:docsDir error:NULL]);
//use fast enumeration to iterate the list of files searching for .png extensions and load those
for (NSString *fileName in docFiles) {
//check to see if the file is a .png file
if ([fileName hasSuffix:#".png"]) {
NSString *fullPath = [docsDir stringByAppendingPathComponent:fileName];
UIImage *loadedImage = [UIImage imageWithContentsOfFile:fullPath];
//you'll have to sort out how to put these images in their proper place
if (!imageView1.image) {
imageView1.image = loadedImage;
} else {
imageView2.image = loadedImage;
}
}
}
}
Hope this helps
One thing you need to be aware of is that when an app enters the background it has about 5 seconds to clean up its act before it's suspended. The UIPNGRepresentation() function takes a significant amount of time and is not instantaneous. You should be aware of this. It would probably be better to write some of this code in other places and do it earlier than at app backgrounding. FWIW
You can use the [NSbundle Mainbundel] to store that images.
To get path
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
First, there's still a problem in your for loop.
for (UIImageView *imageView in self.array) {
NSInteger tag = self.imageView.tag;
UIImage *image = self.imageView.image;
// ...
}
Before you make any other changes, you must understand why. imageView is your for loop control variable, which changes on each iteration through the loop. self.imageView is a different thing. It is the first of the 10 imageViews attached to your viewController. Every time this loop cycles, it looks at the first imageView, and only the first.
As for why saving doesn't work, it's probably because the arrays elsewhere aren't working. Add some logging to make sure there's something in the array, and that it has as many elements as you expect.
-(IBAction)saveButtonPressed:(id)sender {
NSString *docsDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES) objectAtIndex:0];
// Log to make sure the views expected have previously been stored.
// If the array is empty, or shorter than expected, the problem is elsewhere.
NSLog(#"Image view array before saving = %#", self.array);
for (UIImageView *imageViewToSave in self.array) {
NSInteger tag = imageViewToSave.tag;
UIImage *image = imageViewToSave.image;
NSString *imageName = [NSString stringWithFormat:#"Image%i.png",tag];
NSString *imagePath = [docsDir stringByAppendingPathComponent:imageName];
// Log the image and path being saved. If either of these are nil, nothing will be written.
NSLog(#"Saving %# to %#", image, imagePath);
[UIImagePNGRepresentation(image) writeToFile:imagePath atomically:NO];
}
NSLog(#"Save Button Pressed");
}
-(void)processImage:(NSString*)inputPath:(int)imageWidth:(int)imageHeight:(NSString*)outputPath {
// NSImage * img = [NSImage imageNamed:inputPath];
NSImage *image = [[NSImage alloc] initWithContentsOfFile:inputPath];
[image setSize: NSMakeSize(imageWidth,imageHeight)];
[[image TIFFRepresentation] writeToFile:outputPath atomically:NO];
NSLog(#"image file created");
}
- (IBAction)processImage:(id)sender {
NSTimeInterval timeStamp = [[NSDate date] timeIntervalSince1970];
// NSTimeInterval is defined as double
NSNumber *timeStampObj = [NSNumber numberWithInt:timeStamp];
NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
[formatter setNumberStyle:NSNumberFormatterNoStyle];
NSString *convertNumber = [formatter stringForObjectValue:timeStampObj];
NSLog(#"timeStampObj:: %#", convertNumber);
fileNameNumber = [[convertNumber stringByAppendingString:[self genRandStringLength:8]] retain];
int i; // Loop counter.
// Loop through all the files and process them.
for( i = 0; i < [files count]; i++ )
{
inputFilePath = [[files objectAtIndex:i] retain];
NSLog(#"filename::: %#", inputFilePath);
// Do something with the filename.
[selectedFile setStringValue:inputFilePath];
NSLog(#"selectedFile:::: %#", selectedFile);
}
NSLog(#"curdir:::::%#", inputFilePath);
NSString *aString = [[NSString stringWithFormat:#"%#%#%#", thumbnailDirPath , #"/" , fileNameNumber] retain];
fileNameJPG = [[aString stringByAppendingString:#"_small.jpg"] retain];
fileNameJPG1 = [[aString stringByAppendingString:#".jpg"] retain];
fileNameJPG2 = [[aString stringByAppendingString:#"_H.jpg"] retain];
[self processImage:inputFilePath: 66 :55 :fileNameJPG];
[self processImage:inputFilePath: 800 :600 :fileNameJPG1];
[self processImage:inputFilePath: 320 :240 :fileNameJPG2];
}
The issue I am facing is that the above code is generating 3 files with different names(as I have defined the name should be) having the same size of all 3 files but not with the dimensions or width/length I pass to the function.
What can be the issue ?
NSImage objects are immutable. So image is not modified when you change its size.
You should use something like the following code (adapted from here).
-(void)saveImageAtPath:(NSString*)sourcePath toPath:(NSString*)targetPath withWidth:(int)targetWidth andHeight:(int)targetHeight
{
NSImage *sourceImage = [[NSImage alloc] initWithContentsOfFile:sourcePath];
NSImage *targetImage = [[NSImage alloc] initWithSize: NSMakeSize(targetWidth, targetHeight)];
NSSize sourceSize = [sourceImage size];
NSRect sourceRect = NSMakeRect(0, 0, sourceSize.width, sourceSize.height);
NSRect targetRect = NSMakeRect(0, 0, targetWidth, targetWidth);
[targetImage lockFocus];
[sourceImage drawInRect:targetRect fromRect:sourceRect operation: NSCompositeSourceOver fraction: 1.0];
[targetImage unlockFocus];
[[targetImage TIFFRepresentation] writeToFile:targetPath atomically:NO];
NSLog(#"image file created");
[sourceImage release];
[targetImage release];
}
I have a simple iPhone app that allows the user to upload images to a server. The problem is, what if they upload a large image file. I want to limit it down to (a max of) 200 KB. I started something but it seems to crash in my while statement.
Here's the code:
NSString *jpgPath = [NSString stringWithFormat:#"Documents/%#",sqlImageUploadPathTwo];
NSString *jpgPathTwo = [NSString stringWithFormat:#"./../Documents/%#",sqlImageUploadPathTwo];
NSString *yourPath = [NSHomeDirectory() stringByAppendingPathComponent:jpgPath];
NSLog(#"yourPath: %#", yourPath);
NSFileManager *man = [[NSFileManager alloc] init];
NSDictionary *attrs = [man attributesOfItemAtPath: yourPath error: NULL];
int *result = [attrs fileSize];
NSLog(#"Here's the original size: %d", result);
NSLog(#"jpgPath: %# // jpgPathTwo: %#", jpgPath, jpgPathTwo);
while (result > 9715) {
UIImage *tempImage = [UIImage imageNamed: jpgPath];
NSData *imageData = [NSData dataWithData:UIImageJPEGRepresentation(tempImage, 0.9)];
[imageData writeToFile:jpgPathTwo atomically:YES];
NSLog(#"just shrunk it once.");
}
NSLog(#"SIZE AFTER SHRINK: %#", result);
Thanks! Coulton
Something like this:
(also note that you declared result as int* (i.e. a pointer), instead of a number, and the condition should be >, not < (otherwise for large files it won't change them at all). And an extra counter condition is useful to avoid endless loop (basically do it 5 times and then stop doing it, regardless of the size).
NSFileManager *man = [[NSFileManager alloc] init];
NSDictionary *attrs = [man attributesOfItemAtPath: yourPath error: NULL];
int result = [attrs fileSize];
int count = 0;
while (result > 9715 && count < 5) {
UIImage *tempImage = [UIImage imageNamed: jpgPath];
NSData *imageData = [NSData dataWithData:UIImageJPEGRepresentation(tempImage, 0.9)];
[imageData writeToFile:jpgPathTwo atomically:YES];
NSDictionary *attrs = [man attributesOfItemAtPath: jpgPathTwo error: NULL];
result = [attrs fileSize];
count++;
NSLog(#"just shrunk it once.");
}