I am trying to get a file from my PFUser object with by simply:
PFFile *userImageFile = gaUser[#"#userImage"];
This returns nil.
This is what it looks like in my method:
- (void)getRemoteImageAndSaveLocalWithObjectId:(NSString *)objectId andType:(NSString *)type{
if ([type isEqualToString:#"user"]) {
PFQuery *query = [GAUser query];
// I tried the include key but I get an error.
//[query includeKey:#"userImage"];
[query getObjectInBackgroundWithId:objectId block:^(PFObject *object, NSError *error) {
GAUser *gaUser = (GAUser *)object;
// this is nil
PFFile *userImageFile = gaUser[#"userImage"];
if (userImageFile){
[userImageFile getDataInBackgroundWithBlock:^(NSData *data, NSError *error) {
NSLog(#"in get data");
if (!error) {
NSLog(#"remote image name: %#",data.debugDescription);
UIImage *image = [UIImage imageWithData:data];
}else{
NSLog(#"there was an error");
}
}];
}else{
NSLog(#"user image file is nil");
}
}];
}
This prints: user image file is nil
My parse console looks like:
What am I doing wrong?
Since in Parse your column is named userImage, you should be accessing it with:
PFFile *userImageFile = gaUser[#"userImage"];
instead of
PFFile *userImageFile = gaUser[#"#userImage"];
Related
I am running and application that when you like or dislike another user the result is stored in either an array of "accepted" (liked) or array of "rejected" disliked. The array contains the users objectId that you liked/disliked.
When I am querying for results I am using the whereKey:notContainedIn method:
PFQuery *query = [PFUser query];
[query whereKey:#"objectId" notContainedIn:[PFUser currentUser][#"accepted"]];
[query whereKey:#"objectId" notContainedIn:[PFUser currentUser][#"rejected"]];
[query findObjectsInBackgroundWithBlock:^(NSArray * _Nullable objects, NSError * _Nullable error) {
if (!error) {
for (PFObject *object in objects) {
self.displayedUserId = object.objectId;
NSLog(#"userId: %#", self.displayedUserId);
PFFile *imageFile = object[#"image"];
[imageFile getDataInBackgroundWithBlock:^(NSData * _Nullable data, NSError * _Nullable error) {
if (!error) {
UIImage *image = [UIImage imageWithData:data];
self.userImage.image = image;
}else {
NSLog(#"%#", error);
}
}];
}
}else {
NSLog(#"%#", error);
}
}];
An error of:
[__NSPlaceholderArray initWithObjects:count:]: attempt to insert nil object from objects[0]
I am not to sure how to debug or next steps.
I am using Parse.com
When I download my PFFile(contains image) in viewDidAppear my app freezes for a while and then it shows the pic. But that is not right. I want UIActivityIndicatorView to be animated or at least shown. I know that this deals with async or something. But I have no idea how to make that work correctly.
PFFile* imageFile = [[PFUser currentUser] objectForKey:#"profilePic"];
if (imageFile) {
self.activity.hidden = NO;
[self.activity startAnimating];
NSURL* imageFileUrl = [[NSURL alloc]initWithString:imageFile.url];
NSData* imageData = [NSData dataWithContentsOfURL:imageFileUrl];
self.profilePic.image = [UIImage imageWithData:imageData];
}
This downloads the image and shows it.
UPD:
PFQuery* query = [PFUser query];
[query valueForKey:#"profilePic"];
[query findObjectsInBackgroundWithBlock:^(NSArray* data, NSError* error)
{
PFFile* imageFile = data[0];
[imageFile getDataInBackgroundWithBlock:^(NSData* data,NSError* error){
if (!error) {
self.activity.hidden = NO;
[self.activity startAnimating];
NSURL* imageFileUrl = [[NSURL alloc]initWithString:imageFile.url];
NSData* imageData = [NSData dataWithContentsOfURL:imageFileUrl];
self.profilePic.image = [UIImage imageWithData:imageData];
}else{
self.profilePic.image = [UIImage imageNamed:#"profile#2.png"];
}
}];
}];
UPD 2:
This solved my problem. Both answers were helpful.
PFQuery* query = [PFUser query];
[query getObjectInBackgroundWithId:[PFUser currentUser].objectId block:^(PFObject* object, NSError* error){
if(!error){
PFFile* imageFile = object[#"profilePic"];
[imageFile getDataInBackgroundWithBlock:^(NSData* data, NSError* error) {
if (!error) {
self.activity.hidden = NO;
[self.activity startAnimating];
self.profilePic.image = [UIImage imageWithData:data];
NSLog(#"Profile pic shown");
}
else{
NSLog(#"Error 2: %#",error);
}
}];
}else{
self.profilePic.image = [UIImage imageNamed:#"profile#2.png"];
NSLog(#"Fail 1 : %#",error);
}
}];
This is because you are not getting the object in the background. Try using a query to accomplish this. If you need more info I can give you the full query as I have this code inside my app :)
Sample code:
[query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {}];
To get an image with data:
PFFile *imageFile = [object objectForKey:#"YOURKEY"];
[imageFile getDataInBackgroundWithBlock:^(NSData *data, NSError *error) {}];
There are couple of things wrong with your code
Your query is not right, I can't understand this part [query valueForKey:#"profilePic"]; if you want to get user have profile pics then you should do something like this [query whereKeyExist:#"profilePic"];, but at the moment query you have will bring down all objects.
You are downloading image in main thread which make your app free you should do something like this
[imageFile getDataInBackgroundWithBlock:^(NSData *imageData, NSError *error) {
if (!error)
{
self.profilePic.image = [UIImage imageWithData:imageData];
}
}];
You must check data.count before calling data[0], this could crash your application if data array is nil or empty.
Update:
Getting profile pic for currentUser will be something like this
PFUser *currentUser = [PFuser currentUser];
if (!currentUser)
{
//need to login
}
else
{
// may be you need to fetch
__weak typeof(self) weakSelf = self;
[currentUser fetchIfNeededInBackgroundWithBlock:^(PFObject *obj, NSError *error){
PFFile* imageFile = [[PFUser currentUser] objectForKey:#"profilePic"];
[imageFile getDataInBackgroundWithBlock:^(NSData *imageData, NSError *error) {
if (!error)
{
weakSelf.profilePic.image = [UIImage imageWithData:imageData];
}
}];
}];
}
I have a class called "images" on my parse.com app, this class has a column called "imageFile" which contains a .png image, what I'm wondering is how do i set parseImage to be the image taken in from parse. This is what I have so far.
PFQuery *query = [PFQuery queryWithClassName:#"images"];
[query getFirstObjectInBackgroundWithBlock:^(PFObject *object, NSError *error) {
NSLog(#"Retrieved data");
if (!error) {
PFFile *file = [object objectForKey:#"imageFile"];
[file getDataInBackgroundWithBlock:^(NSData *data, NSError *error) {
if (!error) {
parseImage = [UIImage imageWithData:data];
// image can now be set on a UIImageView
}
}];
//parseImage.file = file;
//[imageHolder loadInBackground];
}
}];
parseImage.file = file;
[parseImage loadInBackground];
PFImageView loads asynchronously. Use that instead of manually retrieving the file.
I am trying to do a nested block inside of another block. It seems that possibly asynchronous requests time out a lot fast on iOS8 as opposed to previous version of iOS. Here is my Parse code:
- (void)getRemoteImageAndSaveLocalWithObjectId:(NSString *)objectId andType:(NSString *)type{
if ([type isEqualToString:#"user"]) {
PFQuery *query = [GAUser query];
//[query includeKey:#"userImage"];
[query getObjectInBackgroundWithId:objectId block:^(PFObject *object, NSError *error) {
GAUser *gaUser = (GAUser *)object;
PFFile *userImageFile = gaUser[#"#userImage"];
[userImageFile getDataInBackgroundWithBlock:^(NSData *data, NSError *error) {
// I am never able to get inside this block of code.
NSLog(#"in get data");
if (!error) {
NSLog(#"remote image name: %#",data.debugDescription);
UIImage *image = [UIImage imageWithData:data];
}else{
NSLog(#"there was an error");
}
}];
}];
}
}
Does anyone know why I can't get in the getDataInBackgroundWithBlock block?
Darren and Andy were right (they're probably brothers).
userImageFile was nil and that was the problem.
I set up a profile picture for users following the code here, but I can't seem to retrieve the picture. The code I tried is below please help me out can't seem to figure this out:
PFQuery *query = [PFUser query];
[query getObjectInBackgroundWithId:#"profilePic" block:^(PFObject *object, NSError *error) {
if (!error) {
NSData * imageData = UIImagePNGRepresentation(object);
}
else{
// Error stuff
}
}];
You've misunderstood the purpose of getObjectInBackgroundWithId:block: ... the first parameter is meant to be the ID of the object you want to get. Inside the block you can then query for properties of the object you've gotten.
e.g. if you want the current user:
PFQuery *query = [PFUser query];
[query getObjectInBackgroundWithId:[PFUser currentUser].objectId block:^(PFObject *user, NSError *error) {
if (!error) {
PFFile *profilePic = user[#"profilePic"];
[profilePic getDataInBackgroundWithBlock:^(NSData *imageData, NSError *error) {
if (!error) {
UIImage *image = [UIImage imageWithData:imageData];
}
}];
}
else{
// Error stuff
}
}];