Integrating(Using) iCloud in iOS Apps? - ios

Question

I have simple text file generated in my application. The thing is I want to upload this text file on iCloud so that if the user installs app and inputs data he desires and then agin uninstalls this app. Then the next time he installs that app again I want to fetch the text file uploaded the first time he had used the same app.
I am facing a huge problem in integrating iCloud to my app.
I have done much research but didn't got any specific answers.
P.S. = I am not using Core data.
All i want is to upload the text file generated by the app into the iCloud Drive.
Please guide me step by step how can I achieve this. I have my developer account and I have a bit knowledge about the certificates and all. But still if anyone can please guide me how to achieve it.
I JUST WANT TO UPLOAD THE TEXT FILE TO ICLOUD AND RETRIEVE IT AGAIN WHEN THE SAME APP IS INSTALLED AGAIN (EVEN IF THE APP IS GETTING INSTALLED ON OTHER DEVICES).
ViewController.m
#pragma mark - Image Pick
- (IBAction)pickImage:(id)sender {
//select an image
UIImagePickerController *picker = [[UIImagePickerController alloc]init];
picker.delegate = self;
[self presentViewController:picker animated:YES completion:nil];
}
-(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
[self dismissViewControllerAnimated:YES completion:nil];
}
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info
{
[self dismissViewControllerAnimated:YES completion:nil];
UIImage* image = [info objectForKey:UIImagePickerControllerOriginalImage];
self.imageView.image = image;
//SAVE IMAGE IN iCloud
AppDelegate* myAppDelegate = (AppDelegate*)[UIApplication sharedApplication].delegate;
NSURL* cloudeImage = [myAppDelegate applicationCloudFolder:#"thePicture"];
NSData* imageDate = UIImagePNGRepresentation(image);
[imageDate writeToURL:cloudeImage atomically:YES];
}
-(void)populateUI
{
AppDelegate* myAppDelegate = (AppDelegate*)[UIApplication sharedApplication].delegate;
NSURL* cloudeImageURL = [myAppDelegate applicationCloudFolder:#"thePicture"];
NSData* imageDate = [NSData dataWithContentsOfURL:cloudeImageURL];
UIImage* image = [UIImage imageWithData:imageDate];
if (image) {
self.imageView.image = image;
}
else
{
//download image from iCloud
NSLog(#"Downloading Image...");
[[NSFileManager defaultManager]startDownloadingUbiquitousItemAtURL:cloudeImageURL error:nil];
}
}
- (NSMetadataQuery *)query {
if (!_query) {
_query = [[NSMetadataQuery alloc]init];
NSArray *scopes = #[NSMetadataQueryUbiquitousDocumentsScope];
_query.searchScopes = scopes;
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"%K like %#", NSMetadataItemFSNameKey, #"*"];
_query.predicate = predicate;
if (![_query startQuery]) {
NSLog(#"Query didn't start... for whatever reason");
}
}
return _query;
}
AppDelegate.m
-(NSURL*)applicationCloudFolder:(NSString*)fileName
{
//TEAM ID AND CONTAINER ID
NSString* teamID = #"V58ESG9PLE";
NSString* bundelID =[NSBundle mainBundle].bundleIdentifier;
NSString* containerID = [NSString stringWithFormat:#"%#.%#",teamID,bundelID];
// URL to Cloud Folder
NSURL* cloudeRootURL = [[NSFileManager defaultManager] URLForUbiquityContainerIdentifier:containerID];
NSLog(#"cloudeRootURL %#",cloudeRootURL);
NSURL* cloudDocuments = [cloudeRootURL URLByAppendingPathComponent:#"Document"];
//Apend our file name
cloudDocuments = [cloudDocuments URLByAppendingPathComponent:fileName];
return cloudDocuments;
}
Now I am not getting is my data being saved? ,Where is it getting saved? how can I retrieve it?
P.S. I am saving a picture