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
}
}];
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'm using the Complete iOS 7 course on Udemy and am having a problem with Facebook login persistence. I working on the MatchedUp app.
When I delete the app from my simulator and login with a test user the original name and profile picture persists. When checking Parse data it has clearly created the second user, user permissions, and profile picture. It's not reflected in my app.
Can someone please point me in the right direction?
Is there a method that needs to be called to disable parse push?
Here is where I query Photo:
PFQuery *query = [PFQuery queryWithClassName:#"Photo"];
*//[query whereKey:#"user" equalTo:[PFUser currentUser]];*
[query includeKey:kCCPhotoUserKey];
[query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error)
{
if (!error)
{
self.photos = objects;
[self queryForCurrentPhotoIndex];
}
else
{
NSLog(#"%#", error);
}
}];
and this is where I create Photo:
PFFile *photoFile = [PFFile fileWithData:imageData];
*//PFFile *photoFile = [PFFile fileWithName:[PFUser currentUser][#"user"] data:imageData];*
[photoFile saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error)
{
PFObject *photo = [PFObject objectWithClassName:kCCPhotoClassKey];
[photo setObject:[PFUser currentUser] forKey:kCCPhotoUserKey];
[photo setObject:photoFile forKey:kCCPhotoPictureKey];
[photo saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error)
{
NSLog(#"Photo Saved Successfully");
}];
}];
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 think it's very trivial, but i can't figure it out why these codes are incorrect.
I want to retrieve one image from the Parse User class. I mean, every user has a profile picture, that i store under the "imageFile" column and i would like to load it to a PFImageView. The upload works correctly, but i'cant retrieve it. The log says error, because there is no matches for the query. The file what i want to retrieve exists, so it's 100% that my query implementation is wrong. I would really appreciate any relevant help, thanks.
Non query version: (all versions are implemented in the viewDidLoad)
self.userThumbnail.file = self.currentUser.imageFile;
[self.userThumbnail loadInBackground];
query version
PFQuery *queryImage = [PFQuery queryWithClassName:#"User"];
[queryImage whereKey:#"imageFile" equalTo:self.currentUser]
[queryImage getFirstObjectInBackgroundWithBlock:^(PFObject *object, NSError *error) {
if (error) {
NSLog(#"ERROR");
} else {
PFFile *file = [object objectForKey:#"imageFile"];
self.userThumbnail.file = file;
[self.userThumbnail loadInBackground];
}
}];
query version
PFQuery *queryImage = [PFUser query];
[queryImage whereKey:#"imageFile" equalTo:self.currentUser];
[queryImage getFirstObjectInBackgroundWithBlock:^(PFObject *object, NSError *error) {
if (error) {
NSLog(#"ERROR");
} else {
PFFile *file = [object objectForKey:#"imageFile"];
self.userThumbnail.file = file;
[self.userThumbnail loadInBackground];
}
}];
This line:
[queryImage whereKey:#"imageFile" equalTo:self.currentUser];
looks like a mistake. It says, "find Users whose imageFile column (presumably a PFImage) is equal to the current user object". That will never be true.
Try to separate the logic for finding a user from dealing with it's imageFile. In other words. First get a user:
PFQuery *queryUser = [PFQuery queryWithClassName:#"User"];
[queryUser whereKey:#"username" equalTo:#"some-user-name"];
[queryUser getFirstObjectInBackgroundWithBlock:^(PFObject *user, NSError *error) {}];
// or maybe instead of username==, get a user with their id ...
[queryUser getObjectInBackgroundWithId:#"some-user-id" block:^(PFObject *user, NSError *error) {}];
Now, inside the completion block for querying a user, do your file logic:
[queryUser getFirstObjectInBackgroundWithBlock:^(PFObject *user, NSError *error) {
PFFile *userImageFile = user[#"imageFile"];
[userImageFile getDataInBackgroundWithBlock:^(NSData *imageData, NSError *error) {
if (!error) {
UIImage *image = [UIImage imageWithData:imageData];
// this is a regular UIImage now, put it in your UI
self.someUIImageView.image = image;
}
}];
}];