is it possible to save a image I have picked form the photos library to the Main Bundle of my app? I thought I read somewhere that you can't write to the main bundle of an app in Xcode. If this is not true and it is possible how would I go about doing it.
Use this code to save image from photo Library to Main Bundle
- (void)saveImage:(UIImage*)image withImageName:(NSString*)imageName {
NSData *imageData = UIImagePNGRepresentation(image); //convert image into .png format.
NSFileManager *fileManager = [NSFileManager defaultManager];//create instance of NSFileManager
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); //create an array and store result of our search for the documents directory in it
NSString *documentsDirectory = [paths objectAtIndex:0]; //create NSString object, that holds our exact path to the documents directory
NSString *fullPath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:#"%#.png", imageName]]; //add our image to the path
[fileManager createFileAtPath:fullPath contents:imageData attributes:nil]; //finally save the path (image)
}
Related
i have this code working on IOS7, its check if an image exist in device and if not, it download locally.
Now on IOS8 doesnt save nothing, could someone help me?
//folder where save
NSString *ImagesPath = [[NSString alloc] initWithString:[[[[NSBundle mainBundle] resourcePath] stringByDeletingLastPathComponent] stringByAppendingPathComponent:#"Documents"]];
// check if image exist
NSString* foofile = [ImagesPath stringByAppendingPathComponent:nombreImagenLocal];
BOOL fileExists = [[NSFileManager defaultManager] fileExistsAtPath:foofile];
// check if image exist locally
if (!fileExists){
NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:rutaCompletaLogo]];
//if not, i save it
if (data) {
// url where is saved
NSString *cachedImagePath = [ImagesPath stringByAppendingPathComponent:nombreImagenLocal];
if ([data writeToFile:cachedImagePath atomically:YES]) {
NSLog(#"Downloaded file saved to: %#", cachedImagePath);
}// end
The path to 'Documents' folder has changed from iOS8. Check the Apple tech note
Please, make sure you don't use hardcoded values. Use the methods provided by the API:
NSString *resourcePath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject];
OR (as stated in the previous link)
// Returns the URL to the application's Documents directory.
- (NSURL *)applicationDocumentsDirectory{
return [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject];
}
Hope this helps!
I created an app in Xcode and added a text file for the app to open and display.
How can i get this text file into the iPad sandbox documents directory for testing?
There are a few things you need to do:
Create a path to your Documents directory
Make sure your text file is in your app bundle (Drag/drop into Xcode should be fine)
Copy that text file by name from the app bundle to the Documents directory
Try this:
// Documents path
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsPath = [paths objectAtIndex:0];
// Destination path
NSString *fileInDocumentsPath = [documentsPath stringByAppendingPathComponent:#"name-of-your-file.txt"];
// Origin path
NSString *fileInBundlePath = [[NSBundle mainBundle] pathForResource:#"name-of-your-file" ofType:#"txt"];
// File manager for copying
NSError *error = nil;
NSFileManager *fileManager = [NSFileManager defaultManager];
[fileManager copyItemAtPath:fileInBundlePath toPath:fileInDocumentsPath error:&error];
with reference to my own question,
UITable is not getting populated with NSMutableArray here i got all the file names into a table. And these files where stored in 'Resources' folder. Now i need to fill the same table from the files stored in a subfolder say 'sample' which is in documents folder of ios simulator.
Earlier i did this with the following code
files = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:
[[NSBundle mainBundle] bundlePath] error:nil];
search_results_array = [files filteredArrayUsingPredicate:
[NSPredicate predicateWithFormat:#"self BEGINSWITH[cd] 'h'"]];
here both files and search_results_array are arrays. Now the reading is not from resources. How can i edity it? anybody please help.
Use the following:
NSFileManager *fileManager = [NSFileManager defaultManager];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); //Library directory is not accessible via iTunes, Document directory is
NSString *docDirectory = [paths objectAtIndex:0]; //2
path = [docDirectory stringByAppendingPathComponent:yourString]; //3
files = [[NSDictionary alloc] initWithContentsOfFile: path];
Assuming files is an NSDictionary.
I've been trying to write data back to a pre-defined plist file (data.plist) in my bundle. Using the code below I call the routine 'dictionaryFromPlist' to open the file and then call 'writeDictionaryToPlist' to write to the plist file. However, no data gets added to the plist file.
NSDictionary *dict = [self dictionaryFromPlist];
NSString *key = #"Reports";
NSString *value = #"TestingTesting";
[dict setValue:value forKey:key];
[self writeDictionaryToPlist:dict];
- (NSMutableDictionary*)dictionaryFromPlist {
NSString *filePath = [[NSBundle mainBundle] pathForResource:#"data" ofType:#"plist"];
NSMutableDictionary* propertyListValues = [[NSMutableDictionary alloc]
initWithContentsOfFile:filePath];
return [propertyListValues autorelease];
}
- (BOOL)writeDictionaryToPlist:(NSDictionary*)plistDict{
NSString *filePath = #"data.plist";
BOOL result = [plistDict writeToFile:filePath atomically:YES];
return result;
}
The code runs through successfully and no error is thrown but no data is added to my plist file.
You can not write to your bundle, it is read only. If your case though, you are writing to a relative path, not to the bundle.
I'm not sure what the default working directory is for iOS apps. It is best to use absolute paths. You should be writing to the documents/cache directory. Something like this will get the path for you:
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
Then just grab the lastObject and prepend that to your file name.
As mentioned by #logancautrell you can not write in mainbundle, you can save your plist in the app documents folder, you could do so:
NSString *path = #"example.plist";
NSArray *paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES);
NSString *basePath = ([paths count]> 0)? [paths objectAtIndex: 0]: nil;
NSString *documentPath = [basePath stringByAppendingPathComponent:path] // Documents
NSFileManager *fileManager = [NSFileManager defaultManager];
BOOL checkfile = [fileManager fileExistsAtPath: documentPath];
NSLog(#"%#", (checkFile ? #"Exist": #"Not exist"));//check if exist
if(!checkfile) {//if not exist
BOOL copyFileToDoc = [yourDictionary writeToFile:documentPath atomically: YES];
NSLog(#"%#",(copyFileToDoc ? #"Copied": #"Not copied"));
}
This code copies the referenced file and places it in the Docs Directory. I'm trying to build a simple backup solution. The problem is this operation does not overwrite the existing file if the operation is repeated.
Two questions:
What's the best way to overwrite in code?
How difficult would it be to append the current date to each copied file? In this case there would be no overwrite operation. This would be much more useful for keeping incremental backups. If I decide to do it this way I understand I would need to create a new path in order to keep things organized.
Thanks.
Paul
NSString * name = #"testFile";
NSArray * files = [NSArray arrayWithObject: name];
NSWorkspace * ws = [NSWorkspace sharedWorkspace];
[ws performFileOperation: NSWorkspaceCopyOperation
source: #"~/Library/Application Support/testApp"
destination: #"~/Documents/"
files: files
tag: 0];
You could try using NSFileManager, example below (untested):
// Better way to get the Application Support Directory, similar method for Documents Directory
- (NSString *)applicationSupportDirectory {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSApplicationSupportDirectory, NSUserDomainMask, YES);
NSString *basePath = ([paths count] > 0) ? [paths objectAtIndex:0] : NSTemporaryDirectory();
return [basePath stringByAppendingPathComponent:#"testApp"];
}
- (void) removeFile {
NSFileManager *fileManager = [NSFileManager defaultManager];
NSString *applicationSupportDirectory = [self applicationSupportDirectory];
NSError *error = nil;
NSString* filePath = [applicationSupportDirectory stringByAppendingPathComponent: #"testFile"];
if ([fileManager fileExistsAtPath:filePath isDirectory:NULL]) {
[fileManager removeItemAtPath:filePath error:&error];
}
}
Edit:
Take a look at the NSFileManager Class Reference for other functions that might be useful (for your second question).