I am using OneDriveSDK for iOS . I am unable to find streamable Path for any file.
dispatch_semaphore_t sema = dispatch_semaphore_create(0);
__block NSString *streamablePath = #"";
ODClient *client = [ODClient loadCurrentClient];
ODItemRequest *request = [[[client drive] items:item.path] request];
[request getWithCompletion:^(ODItem *response, NSError *error) {
if (!error)
{
streamablePath = [[response dictionaryFromItem] objectForKey:#"#content.downloadUrl"];
dispatch_semaphore_signal(sema);
}
}];
dispatch_semaphore_wait(sema, DISPATCH_TIME_FOREVER);
return streamablePath;
Related
Im getting Facebook User Data to auto completing signup textfields.
Problem: I did a test and NSLog returns information quickly, but to update the TextFields.text it's delaying.
Code:
- (IBAction)facebookProfile:(id)sender {
if(!_accountStore)
_accountStore = [[ACAccountStore alloc] init];
ACAccountType *facebookTypeAccount = [_accountStore accountTypeWithAccountTypeIdentifier:ACAccountTypeIdentifierFacebook];
[_accountStore requestAccessToAccountsWithType:facebookTypeAccount
options:#{ACFacebookAppIdKey: #"417425124162461", ACFacebookPermissionsKey: #[#"email"]}
completion:^(BOOL granted, NSError *error) {
if(granted){
NSArray *accounts = [_accountStore accountsWithAccountType:facebookTypeAccount];
_facebookAccount = [accounts lastObject];
NSLog(#"Success");
[self me];
}else{
// ouch
NSLog(#"Fail");
NSLog(#"Error: %#", error);
}
}];
}
- (void)me {
NSURL *meUrl = [NSURL URLWithString:#"https://graph.facebook.com/me"];
SLRequest *meRequest = [SLRequest requestForServiceType:SLServiceTypeFacebook requestMethod:SLRequestMethodGET URL:meUrl parameters:nil];
meRequest.account = _facebookAccount;
[meRequest performRequestWithHandler:^(NSData *responseData, NSHTTPURLResponse *urlResponse, NSError *error) {
if (!error) {
NSDictionary *resultsDictionary = [responseData objectFromJSONData];
NSLog(#"%#", [resultsDictionary objectForKey:#"name"]);
// The problem is here. While NSLog runs in seconds showing Facebook User Name, the textfiend.text updates take about 10 seconds longer.
_tfName.text = [resultsDictionary objectForKey:#"name"];
_tfEmail.text = [resultsDictionary objectForKey:#"email"];
_tfGender.text = [resultsDictionary objectForKey:#"gender"];
_tfBirthday.text = [resultsDictionary objectForKey:#"birthday"];
}
}];
}
You need to perform UI updates on the main thread. Your completion handler is being called on a background thread.
[meRequest performRequestWithHandler:^(NSData *responseData, NSHTTPURLResponse *urlResponse, NSError *error) {
if (!error) {
NSDictionary *resultsDictionary = [responseData objectFromJSONData];
NSLog(#"%#", [resultsDictionary objectForKey:#"name"]);
// The problem is here. While NSLog runs in seconds showing Facebook User Name, the textfiend.text updates take about 10 seconds longer.
// Ensure UI updated on main queue
dispatch_async(dispatch_get_main_queue(), ^{
_tfName.text = [resultsDictionary objectForKey:#"name"];
_tfEmail.text = [resultsDictionary objectForKey:#"email"];
_tfGender.text = [resultsDictionary objectForKey:#"gender"];
_tfBirthday.text = [resultsDictionary objectForKey:#"birthday"];
});
}
}];
I have a loop set up that downloads a series a images which I will later use for to animate using the animationImages property of UIImageView. I would like to know when all the blocks inside my loops have finished executing so I could begin the animation, and was wondering how I may be able to tell when they are finished completing? Thanks!
for (PFObject *pictureObject in objects){
PFFile *imageFile = [pictureObject objectForKey:#"image"];
NSURL *imageFileURL = [[NSURL alloc] initWithString:imageFile.url];
NSURLRequest *imageRequest = [NSURLRequest requestWithURL:imageFileURL];
[tokenImageView setImageWithURLRequest:imageRequest placeholderImage:nil success:^(NSURLRequest *request, NSHTTPURLResponse *response, UIImage *image) {
[self.downloadedUIImages addObject:image]; //This is a mutableArray that will later be set to an UIImageView's animnationImages
} failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error) {
NSLog(#"Error %#", error);
}];
}
//When I know all the blocks have finished downloading, I will then to animate the downloaded images.
Edit: having issue with Error -999
I am encountering the following issue when executing the code in the provided answer: Domain=NSURLErrorDomain Code=-999 "The operation couldn’t be completed. (NSURLErrorDomain error -999.)"
A quick search reveals that Error -999 means "another request is made before the previous request is completed" ... which is certainly the case here since I am making several requests in quick succession. The recommended fix suggested here didn't work for me as it will only successfully download one UIImage (the last one requested) , with the previous ones failing. I was wondering if there is workaround here or in AFNetworking that I ought to consider? Thanks!
Edit 2: working code based on #David's solution
for (PFObject *pictureObject in objects){
PFFile *imageFile = [pictureObject objectForKey:#"image"];
NSURL *imageFileURL = [[NSURL alloc] initWithString:imageFile.url];
NSURLRequest *imageRequest = [NSURLRequest requestWithURL:imageFileURL];
AFHTTPRequestOperation *requestOperation = [[AFHTTPRequestOperation alloc] initWithRequest:imageRequest];
requestOperation.responseSerializer = [AFImageResponseSerializer serializer];
dispatch_group_enter(group);
[requestOperation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(#"Response: %#", responseObject);
UIImage *retrivedImage = (UIImage *)responseObject;
[self.downloadedUIImages addObject:retrivedImage];
dispatch_group_leave(group);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Image error: %#", error);
dispatch_group_leave(group);
}];
[requestOperation start];
counter ++;
}
dispatch_group_notify(group, dispatch_get_main_queue(), ^{
NSLog(#"Horray everything has completed");
NSLog(#"What is here %#", self.downloadedUIImages);
NSLog(#"Done");
});
Create a dispatch group, in the for loop enter the group, in the completion block leave the group. Then you can use dispatch_group_notify to find out when all blocks have completed:
dispatch_group_t group = dispatch_group_create();
for (PFObject *pictureObject in objects){
PFFile *imageFile = [pictureObject objectForKey:#"image"];
NSURL *imageFileURL = [[NSURL alloc] initWithString:imageFile.url];
NSURLRequest *imageRequest = [NSURLRequest requestWithURL:imageFileURL];
dispatch_group_enter(group);
[tokenImageView setImageWithURLRequest:imageRequest placeholderImage:nil success:^(NSURLRequest *request, NSHTTPURLResponse *response, UIImage *image) {
[self.downloadedUIImages addObject:image]; //This is a mutableArray that will later be set to an UIImageView's animnationImages
dispatch_group_leave(group);
} failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error) {
NSLog(#"Error %#", error);
dispatch_group_leave(group);
}];
}
dispatch_group_notify(group, dispatch_get_main_queue(), ^{
// do your completion stuff here
});
Count how many you've completed. The challenging part is making it thread safe. I recommend creating an atomic counter class for that.
Generic solution!
+ (void)runBlocksInParallel:(NSArray *)blocks completion:(CompletionBlock)completion {
AtomicCounter *completionCounter = [[AtomicCounter alloc] initWithValue:blocks.count];
for (AsyncBlock block in blocks) {
block(^{
if ([completionCounter decrementAndGet] == 0) {
if (completion) completion();
}
});
}
if (blocks.count == 0) {
if (completion) completion();
}
}
NSMutableArray *asyncBlocks = [NSMutableArray array];
for (PFObject *pictureObject in objects){
[asyncBlocks addObject:^(CompletionBlock completion) {
PFFile *imageFile = [pictureObject objectForKey:#"image"];
NSURL *imageFileURL = [[NSURL alloc] initWithString:imageFile.url];
NSURLRequest *imageRequest = [NSURLRequest requestWithURL:imageFileURL];
[tokenImageView setImageWithURLRequest:imageRequest placeholderImage:nil success:^(NSURLRequest *request, NSHTTPURLResponse *response, UIImage *image) {
[self.downloadedUIImages addObject:image]; //This is a mutableArray that will later be set to an UIImageView's animnationImages
} failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error) {
NSLog(#"Error %#", error);
} completion:completion];
}];
}
[BlockRunner runBlocksInParallel:[asyncBlocks copy] completion:^{
//Do your final completion here!
}];
Set up a property and initialize it to the number of cycles - objects.count. In the completion of the block, lower the number down. When you reach zero, you are done.
for (PFObject *pictureObject in objects){
PFFile *imageFile = [pictureObject objectForKey:#"image"];
NSURL *imageFileURL = [[NSURL alloc] initWithString:imageFile.url];
NSURLRequest *imageRequest = [NSURLRequest requestWithURL:imageFileURL];
[tokenImageView setImageWithURLRequest:imageRequest placeholderImage:nil success:^(NSURLRequest *request, NSHTTPURLResponse *response, UIImage *image) {
[self.downloadedUIImages addObject:image]; //This is a mutableArray that will later be set to an UIImageView's animnationImages
if([[objects lastObject] isEqual:pictureObject]) {
[self animateImages];
}
} failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error) {
NSLog(#"Error %#", error);
if([[objects lastObject] isEqual:pictureObject]) {
[self animateImages];
}
}];
}
- (void)animateImages {
//do animation here.
}
I'm new to iOS and I have trouble understanding and applying well dispatch ... I have an application I need to query a website (api) within a for loop, the end of that cycle I need to make further inquiries in another cycle, and finally, at the end of both cycles need to switch views.
I now have this code (after much trial and error but still does not work):
dispatch_queue_t queue = dispatch_queue_create("threadServicios", DISPATCH_QUEUE_SERIAL);
dispatch_group_t group = dispatch_group_create();
dispatch_group_enter(group);
dispatch_async(queue, ^(void) {
NSLog(#"llego a buscar servicios por local");
for (NSDictionary *local in _arrLocalesTmp) {
[self getListaServiciosPorLocal:[local objectForKey:#"idLocal"]];
//this function calls another function that consumes a web service and get a json
}
procced = YES;
NSLog(#"llego a buscar profesionales por local");
for (NSDictionary *local in _arrLocalesTmp) {
[self getListaProfesionalesPorLocal:[local objectForKey:#"idLocal"]];
//this function calls another function that consumes a web service and get a json
}
procced2 = YES;
dispatch_group_leave(group);
});
dispatch_group_notify(group, dispatch_get_main_queue(),^{
NSLog(#"dispatch procced 1");
if (procced && procced2) {
[self setFormularioConsultaCompleto];
}
});
The function [self getListaServiciosPorLocal: [Local objectForKey: # "idLocal"]]; is as follows:
dispatch_async(dispatch_get_main_queue(), ^(void) {
NSURL *url = [NSURL URLWithString:urlConnection];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
NSURLSessionConfiguration *sessionConfiguration = [NSURLSessionConfiguration defaultSessionConfiguration];
sessionConfiguration.timeoutIntervalForRequest = 30;
sessionConfiguration.timeoutIntervalForResource = 60;
NSURLSession *session = [NSURLSession sessionWithConfiguration:sessionConfiguration];
NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
__block NSError *jsonError;
NSHTTPURLResponse *urlResponse = (NSHTTPURLResponse *) response;
if(!error) {
if(urlResponse.statusCode == 200) {
NSDictionary *response = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:&jsonError];
if(response) {
NSString *resp = [NSString stringWithFormat:#"%#", [dataResponse objectForKey:#"resp"]];
if([resp isEqualToString:#"1"]) {
_json = [dataResponse objectForKey:#"data"];
[_arrServiciosTmp addObjectsFromArray:(NSArray *)_json];
} else {
NSString *message = [dataResponse objectForKey:#"description"];
}
} else {
self.lblMensaje.text = #"Ha ocurrido un error al obtener la información, por favor, vuelva a intentarlo en unos momentos.";
}
} else {
completion(nil);
}
} else {
NSLog(#"Error en Task");
}
});
And the function [self getListaProfesionalesPorLocal: [Local objectForKey: # "idLocal"]]; is similar but obtains other information
The problem is that the app calls this function [self setFormularioConsultaCompleto]; (changing the view) but the above functions still do not quite get all the data from webservice.
Sorry for this, but I gave up, I hope can help me!
Thanks!
The below uses dispatch groups to hold off starting another block till the groups work has been completed.
First change your data methods to not be wrapped in dispatch_async and accept a completion block, calling that at the end of the NSURLSessionDataTasks completionHandler:
-(void)getListaServiciosPorLocal:(id)whatEver withCompletionBlock:(dispatch_block_t)block
{
NSURL *url = [NSURL URLWithString:urlConnection];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
NSURLSessionConfiguration *sessionConfiguration = [NSURLSessionConfiguration defaultSessionConfiguration];
sessionConfiguration.timeoutIntervalForRequest = 30;
sessionConfiguration.timeoutIntervalForResource = 60;
NSURLSession *session = [NSURLSession sessionWithConfiguration:sessionConfiguration];
NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
__block NSError *jsonError;
NSHTTPURLResponse *urlResponse = (NSHTTPURLResponse *) response;
if(!error) {
if(urlResponse.statusCode == 200) {
NSDictionary *response = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:&jsonError];
if(response) {
NSString *resp = [NSString stringWithFormat:#"%#", [dataResponse objectForKey:#"resp"]];
if([resp isEqualToString:#"1"]) {
_json = [dataResponse objectForKey:#"data"];
[_arrServiciosTmp addObjectsFromArray:(NSArray *)_json];
} else {
NSString *message = [dataResponse objectForKey:#"description"];
}
} else {
self.lblMensaje.text = #"Ha ocurrido un error al obtener la información, por favor, vuelva a intentarlo en unos momentos.";
}
} else {
completion(nil);
}
} else {
NSLog(#"Error en Task");
}
block(); // Notify completion block
});
}
Now when you call these methods:
dispatch_group_t group = dispatch_group_create();
dispatch_async(queue, ^(void) {
NSLog(#"llego a buscar servicios por local");
for (NSDictionary *local in _arrLocalesTmp) {
dispatch_group_enter(group);
[self getListaServiciosPorLocal:[local objectForKey:#"idLocal"] withCompletionBlock:^{
dispatch_group_leave(group);
}];
}
NSLog(#"llego a buscar profesionales por local");
for (NSDictionary *local in _arrLocalesTmp) {
dispatch_group_enter(group);
[self getListaProfesionalesPorLocal:[local objectForKey:#"idLocal"] withCompletionBlock:^{
dispatch_group_leave(group);
}];
}
});
dispatch_group_notify(group, dispatch_get_main_queue(),^{
[self setFormularioConsultaCompleto];
});
(Adapted from this answer)
Fortunately I know where my memory pressure issue is coming from, and I have tried a number of techniques such as wrapping a block in an #autorelease block and setting objects to nil but still no success.
Sorry for dumping too much code here, I tried to cut it down to the essentials. Here is the code for downloading and saving images:
NSMuttableArray *photosDownOps = [NSMuttableArray array];
NSURL *URL = [...];
NSURLRequest *request = [...];
AFHTTPRequestOperation *op = [[AFHTTPRequestOperation alloc] initWithRequest:request];
op.responseSerializer = [AFImageResponseSerializer serializer];
[op setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
dispatch_queue_t amBgSyncQueue = dispatch_queue_create("writetoFileThread", NULL);
dispatch_async(amBgSyncQueue, ^{
[self savePhotoToFile:(UIImage *)responseObject usingFileName:photo.id];
});
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
if ([error code] != NSURLErrorCancelled)
NSLog(#"Error occured downloading photos: %#", error);
}];
[photosDownOps addObject:op];
NSArray *photosDownloadOperations = [AFURLConnectionOperation batchOfRequestOperations:photosDownloadOperatons
progressBlock:^(NSUInteger nof, NSUInteger tno) {
} completionBlock:^(NSArray *operations) {
NSLog(#"all photo downloads completed");
}];
[self.photosDownloadQueue addOperations:photosDownloadOperations waitUntilFinished:NO];
+ (void) savePhotoToFile:(UIImage *)imageToSave usingFileName:(NSNumber *)photoID{
#autoreleasepool {
NSData * binaryImageData = UIImageJPEGRepresentation(imageToSave, 0.6);
NSString *filePath = [Utilities fullPathForPhoto:photoID];
[binaryImageData writeToFile:filePath atomically:YES];
binaryImageData = nil;
imageToSave = nil;
}
}
This situation though only happens with iPhone 4s devices that I have tested on, it does not happen on iPhone 5 models.
I managed to solve this by extending NSOperation and within the main block immediately after I receive the data I write it out to file:
- (void)main{
#autoreleasepool {
//...
NSData *imageData = [[NSData alloc] initWithContentsOfURL:imageUrl];
if (imageData) {
NSError *error = nil;
[imageData writeToFile:imageSavePath options:NSDataWritingAtomic error:&error];
}
//...
}
}
This NSOperation object was then added a NSOperationQueue I already had.
Try to create your own class to download image using NSUrlConnection and in the delegate method append that data to your file just see the below code
-(void)connection:(NSURLConnection*)connection didReceiveData:(NSData*)data {
NSFileHandle *fileHandle = [NSFileHandle fileHandleForWritingAtPath:aPath];
[fileHandle seekToEndOfFile];
[fileHandle writeData:data];
[fileHandle closeFile];
}
This will help you in memory management as all the data which is download is not need to cache .
I want to post a tweet to Twitter when user taps a button in the application. I don't want to use the TWTweetComposeViewController so that the user again need to tap the Send button. I want to post tweet on tap on a button inside the application. (Using iOS Twitter Framework)
Is there any way to do this ?
Thanks
Use below code to do post image and text without showing ViewContoller . This is called silent Post.
- (void) shareOnTwitterWithMessage:(NSString *)message {
ACAccountStore *twitterAccountStore = [[ACAccountStore alloc]init];
ACAccountType *TWaccountType= [twitterAccountStore accountTypeWithAccountTypeIdentifier:ACAccountTypeIdentifierTwitter];
[twitterAccountStore requestAccessToAccountsWithType:TWaccountType options:nil completion:
^(BOOL granted, NSError *e) {
if (granted) {
NSArray *accounts = [twitterAccountStore accountsWithAccountType:TWaccountType];
twitterAccounts = [accounts lastObject];
NSDictionary *dataDict = #{#"status": message};
[self performSelectorInBackground:#selector(postToTwitter:) withObject:dataDict];
}
else {
return ;
}
}];
}
- (void)postToTwitter:(NSDictionary *)dataDict{
NSURL *requestURL = [NSURL URLWithString:#"https://api.twitter.com/1.1/statuses/update_with_media.json"];
SLRequest *request = [SLRequest requestForServiceType:SLServiceTypeTwitter requestMethod:SLRequestMethodPOST URL:requestURL parameters:dataDict];
NSData *imageData = UIImagePNGRepresentation([UIImage imageNamed:#"icon#2x.png"]);
[request addMultipartData:imageData
withName:#"media[]"
type:#"image/jpeg"
filename:#"image.jpg"];
request.account = twitterAccounts;
[request performRequestWithHandler:^(NSData *data, NSHTTPURLResponse *response, NSError *error) {
if(!error){
NSDictionary *list =[NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
if(![list objectForKey:#"errors"]){
if([list objectForKey:#"error"]!=nil){
//Delegate For Fail
return ;
}
}
}
}];
}
Try this:
NSString *statusesShowEndpoint = #"https://api.twitter.com/1.1/statuses/update.json";
NSDictionary *params = #{#"status": #"Hello, my first autopost tweet..."};
NSError *clientError;
NSURLRequest *request = [[[Twitter sharedInstance] APIClient]
URLRequestWithMethod:#"POST"
URL:statusesShowEndpoint
parameters:params
error:&clientError];
if (request) {
[[[Twitter sharedInstance] APIClient]
sendTwitterRequest:request
completion:^(NSURLResponse *response,
NSData *data,
NSError *connectionError) {
if (data) {
// handle the response data e.g.
NSError *jsonError;
NSDictionary *dicResponse = [NSJSONSerialization
JSONObjectWithData:data
options:0
error:&jsonError];
NSLog(#"%#",[dicResponse description]);
}
else {
NSLog(#"Error code: %ld | Error description: %#", (long)[connectionError code], [connectionError localizedDescription]);
}
}];
}
else {
NSLog(#"Error: %#", clientError);
}