Question

I am trying to download some images from Dropbox in this way:

-(void)catchTheImage{

NSString *title = [[NSUserDefaults standardUserDefaults]objectForKey:@"Folder3"];
PhotoViewController* sharedSingleton = [PhotoViewController sharedManager];
NSString *filename2 = [NSString stringWithFormat:@"/[e-mail].%ld", title, (long)sharedSingleton.tagNumber];

NSString *tmpPngFile = [NSTemporaryDirectory() stringByAppendingPathComponent:[NSString stringWithFormat:@"%@", filename2]];

[restClient loadFile:filename2 intoPath:tmpPngFile];

[NSTimer scheduledTimerWithTimeInterval:10 target:self selector:@selector(lf) userInfo:nil repeats:NO];

}

-(void)lf{

NSString *tmpPngFile = [NSTemporaryDirectory() stringByAppendingPathComponent:[NSString stringWithFormat:@"%@", filename2]];
UIImage* image = [UIImage imageWithContentsOfFile:tmpPngFile];
photoView.image = image;
}

I know the timer isn’t a good idea but its just for trying.
TagNumber can be 1, 2, or 3 since the images on dropbox are 3, but the images are not showing up. I think they are not saved in the folder at all. May be I have a misunderstanding of how NSTemporaryDirectory works…

Answer 1

Yes, you need to implement Dropbox delegate methods that will return a status about your loading process

here it is

- (void)restClient:(DBRestClient*)client loadedFile:(NSString*)destPath;
// Implement the following callback instead of the previous if you care about the value of the
// Content-Type HTTP header and the file metadata. Only one will be called per successful response.
- (void)restClient:(DBRestClient*)client loadedFile:(NSString*)destPath contentType:(NSString*)contentType metadata:(DBMetadata*)metadata;
- (void)restClient:(DBRestClient*)client loadProgress:(CGFloat)progress forFile:(NSString*)destPath;
- (void)restClient:(DBRestClient*)client loadFileFailedWithError:(NSError*)error;

and in your case:

- (void)restClient:(DBRestClient*)client loadedFile:(NSString*)destPath contentType:(NSString*)contentType metadata:(DBMetadata*)metadata {

NSString *tmpPngFile = [NSTemporaryDirectory() stringByAppendingPathComponent:[NSString stringWithFormat:@"%@", filename2]];
UIImage* image = [UIImage imageWithContentsOfFile:tmpPngFile];
photoView.image = image;

}


- (void)restClient:(DBRestClient*)client loadFileFailedWithError:(NSError*)error {

    [[[UIAlertView alloc] initWithTitle:@"Oops!!!" message:@"Try again." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles: nil] show];
}