iOS: nested push animation can result in corrupted navigation bar

Today I got a very strange error by running an iOS App:

1. nested push animation can result in corrupted navigation bar
2. Finishing up a navigation transition in an unexpected state. Navigation Bar subview tree might get corrupted.

It happens when the view controller tries to pop to top view controller without waiting for the loading end of child view controller.

Solution:

1. try to set a boolean variable to mark the view controller should pop to the top view controller
2. in viewDidAppear:(BOOL)animated method, check if a call of [self.navigationController popToRootViewControllerAnimated:YES] is needed

The reason:

popToRootViewControllerAnimated() must be called after the view appears!

Fix the cydia crash problem after jailbreak iOS 5 with redsn0w 0.9.9b9

It is really weird. After using redsn0w 0.9.9b9 to jailbreak my iPhone 3GS with iOS 5.0.1, the iphone can be booted with the option "just boot" in redsn0w. The Cydia icon showes up on the screen. Open it and say I am a "User". The loading process can be seen, and... quit. I can ssh into the iOS, that is to say, the iphone is already jailbroken. But what happened with Cydia?!

I've tried many different methods.

1. restore the stock firmware and do the jailbreak again. -> No success.
2. reinstall Cydia with SSH on the iPhone. -> No success.
3. just boot the iphone tetherly again and again -> No success.


So I tried to read the log file of Cydia. The log file can be found at /private/var/tmp/cydia.log. I noticed that an error is repeated again and again.


2011-12-22 14:43:20.135 MobileCydia[252:e07] Setting Language: de_DE
Assertion failed: (dictionary->lockFD != -1), function IDXUserDictionaryOpen, file /SourceCache/Mecabra/Mecabra-248/mecabra/IDXUserDictionary.c, line 88.

I've googled for a while and nothing is found...but it must be something wrong with the laguage settings. I've discoved I use English as user interface language and German as date/time format. Mumm, maybe that is the problem. I've set the both as English. Now, Cydia runs smoothly without any problems.

In a short, that is a bug of Cydia, it depends on the language settings of iOS! Try to set up the language unified, then it doesn't complain again.

iOS BUG: Synced music won't appear in iPod or Music App

Yesterday I've updated my iPhone 3GS by the means of OTA (Over The Air) to the newest firmware iOS 5.0.1. Everything runs smoothly, BUT! After I open the supplied Music App, I've seen only a very little part of my music collection? Where did they go?



Firstly I thought the update deleted my not-from-itunes-store-bought music files, then I checked the iTunes, the status bar of my iphones indicates that there are exactly 13.6GB music files on it. It appears that the mediathek file on the iphone has corrupted with the update, or maybe the update has changed the structure of the mediathek file and forgetten to update it.

What can I do? Sure, completely restore is one way but also the last way I wanna go. So I've googled around for a while to find out a better and smart way to correct it. Then I found this article [iOS 4.2 bugs: iPhone music gone after the update? Here’s the fix! ]. Okay, i am not the only one and iOs 5.0.1 is also not the only one with that bug.

1. Grab your cable and plug your iPhone into iTunes on your Windows or Mac PC



2. When your iPhone shows up in the sidebar, make sure you can see the content listings beneath it (click on the triangle to the left if not)



3. Click on music



4. Pick a song



5. Play it in iTunes



6. Sync your iPhone

The method in that article didn't work for me for the first time. I have to figure out why it doesn't work. The reason behind that method is: Change the play count for a song, then iTunes changes the mediathek file on the iPhone.

So it is very important for that method, just try to play a song and maybe you can forward it very quickly to the end, make SURE that the play count of that song changed and resync!

Things are gonna be alright and we don't know when apple will fix that long-lasting bug.

Some Reasons Why I Don't Update My iPhone (1st Gen) To Firmware 3.1

The firmware 3.1 for iPhone has been released for a while. Every time when I plug in my iPhone to my Macbook, the iTunes reminds me always of a new iPhone OS available. But I must say no to iTunes every time. So why I don't want update my iPhone to that version 3.1? There are 5 reasons or at least my considerations.

PROs:
1. PwnageTool 3.1 (http://blog.iphone-dev.org/) is ready for the go. AppSync for OS 3.1 in Cydia is appeared too. (Instructions)
2. iPhone OS 3.1 has the funtion that man can arrange the application layout directly in iTunes.
3. Genius Mix will be supported.

CONs:
1. For non-Standard accessories there are still no hacks appeared like 3.01. The magic is called iapd. It fixs the problem with the message "This Accessory is not made to work with iPhone"

2. It's possible to develope iPhone applications for jailbroken iPhone 3.0 with a patched XCode 3.1.3. (Source) But until now, I didn't get how to make it work with iPhone OS 3.1 and XCode 3.2.

Updates!
1. MichaelS confirmed that the pathed iapd for 3.0 also works for 3.1.2!
2. Xcode 3.2 works
with jailbroken iPhone 3.1 too according to
the "Float Middle" Blog.

So, now it is the time to update! :)