Google Data APIs Objective-C Client Library Discussion Google Group

Re: Auto clearing the cache??

grobb...@google.com (Greg Robbins) — Fri, 18 Dec 2009 19:25:53 UT

The cache will release previously cached responses as needed to stay under
the limit. The method -pruneCacheResponses in the class GDataURLCache does
the work of freeing the oldest cache entries.

Auto clearing the cache??

maoyang.ch...@gmail.com (jeffery) — Fri, 18 Dec 2009 09:44:39 UT

I've readed the document about Performance tuning in the Google Data
APIs Object-C Library, that mentioned about cache data is limited in
size(15MB on Mac OS X,1 MB on iPhone ) , Will cache data be free or
released when exceed 15MB or 1 MB on iPhone ??

Re: Problems with GDataEntryYouTubeEntry

tyler.w...@gmail.com (TylerWeir) — Wed, 16 Dec 2009 17:23:51 UT

(I replied say all is well, apparently that did not take, so here it
is again.)

Thanks, it's all working now.

-ObjC was required for a few other libs I use, so it's set.

The solution was adding this to the code:

- (void)entryListFetchTicket: (GDataServiceTicket *) ticket
finishedWithFeed: (GDataFeedBase *) feed error: (NSError *) error {

Re: Problems with GDataEntryYouTubeEntry

sljenk...@mac.com (SJ) — Wed, 16 Dec 2009 17:00:24 UT

The -ObjC option makes sense... All these problems occurred during
the initial phases of configuring XCode to properly compile and link a
very simple example for the iPhone. Therefore, with all the options
and build types (debug, release, distribution, etc...) they probably
just didn't get updated properly at first.

Re: Problems with GDataEntryYouTubeEntry

grobb...@google.com (Greg Robbins) — Wed, 16 Dec 2009 16:46:51 UT

You can inspect the XML for a feed or entry by writing the entry's XML to
the console with
NSLog(@"the feed's XML is %@", [feed XMLElement]);
or
NSLog(@"the entry's XML is %@", [entry XMLElement]);

That is typically useful in the callback from a fetch to see what was
returned by the server (in the finishedWithFeed: or finishedWithEntry:

Re: Problems with GDataEntryYouTubeEntry

sljenk...@mac.com (SJ) — Wed, 16 Dec 2009 15:36:45 UT

Something to look for in the mean time...

Make sure you are checking the type of the object explicitly... For
example:

if ([gentry isKindOfClass:[GDataEntryYouTu bePlaylist class]]) {
...

This will cause the linker to link the class object and it will
automatically register. If you just use casts and base class pointers

Re: Problems with GDataEntryYouTubeEntry

tyler.w...@gmail.com (Tyler Weir) — Wed, 16 Dec 2009 15:23:08 UT

Sounds like the solution to me, I'd appreciate it if you could take a
look at your code for me.

Thanks,
Tyler

------------------------------ -------
[link]

Re: Problems with GDataEntryYouTubeEntry

sljenk...@mac.com (SJ) — Wed, 16 Dec 2009 15:20:41 UT

I had this same problem and found out that the GDataFeedYouTubeVideo
classes were not being registered. They are created with a factory
style pattern that looks up the derived class based on the XML
returned. If the correct class is not registered then you just get
the base class back. You need to explicitly use the class or call the

Re: Problems with GDataEntryYouTubeEntry

tyler.w...@gmail.com (TylerWeir) — Wed, 16 Dec 2009 14:32:01 UT

I did the same thing with the example app and it worked as expected.
I then copied the working code to my iPhone app and ran into the
issue.
The feed is "GDataFeedYouTubeVideo" but the entries are
"GDataEntryBase."

If I break and print the objects to the console, I get this:
Printing description of feed:

Re: Problems with GDataEntryYouTubeEntry

grobb...@google.com (Greg Robbins) — Wed, 16 Dec 2009 01:14:11 UT

I just tried adding kGDataYouTubeUserFeedIDNewSubs criptionVideos to the list
of feeds in YouTubeSampleWindowController, built and ran the app, and had it
fetch the newsubcriptionvideos feed. The entries in the feed are being
instantiated as GDataEntryYouTubeVideo, as expected.

I'm curious if the XML for the entries in your feed have the category

Re: Problems with GDataEntryYouTubeEntry

tyler.w...@gmail.com (TylerWeir) — Wed, 16 Dec 2009 01:07:40 UT

Looks like it:
nm -m libGDataTouchStaticLib.a | grep GDataEntryYouTubeVideo produces
the appropriate symbols.

Re: Problems with GDataEntryYouTubeEntry

grobb...@google.com (Greg Robbins) — Wed, 16 Dec 2009 00:47:36 UT

Is GDataEntryYouTubeVideo.m being compiled into your application? Omitting
the source for an entry or feed will stop it from being instantiated when
it's needed.

Re: Problems with GDataEntryYouTubeEntry

grobb...@google.com (Greg Robbins) — Wed, 16 Dec 2009 00:21:40 UT

You can turn on http logging by calling
[GDataHTTPFetcher setIsLoggingEnabled:YES];

You can example the XML for a feed or an entry with
NSLog(@"%@", [object XMLElement]);

Re: Problems with GDataEntryYouTubeEntry

tyler.w...@gmail.com (TylerWeir) — Wed, 16 Dec 2009 00:15:53 UT

The code:
NSString *feedID = kGDataYouTubeUserFeedIDNewSubs criptionVideos;
NSURL *fURL = [GDataServiceGoogleYouTube
youTubeURLForUserID:rootItem.f eedURL userFeedID:feedID];

Printing fURL shows:
"[link]
newsubscriptionvideos"

Printing an Entry:

Re: Problems with GDataEntryYouTubeEntry

grobb...@google.com (Greg Robbins) — Tue, 15 Dec 2009 22:20:47 UT

Which feed are you trying to fetch? What does the XML of one of the
returned entries look like?

During parsing of the feed and entries returned by the server, an entry's
class is usually determined by the "kind" category element of the entry. A
GDataEntryBase instance is created only when there's not a recognizable kind