[ios] iphone simulator file system location

open a terminal, then cd ~/Library/Application\ Support/iPhone\ Simulator

then I can see 6.1 folder.

The app folder will be in 6.1/Applications/xxxxx  where xxxx is the app id. or you can check all folders to find where is your app.

[ios] some issue: async, guid, priority queue, view fade-in, image reflection

How do I wait for an asynchronously dispatched block to finish?

http://stackoverflow.com/questions/4326350/how-do-i-wait-for-an-asynchronously-dispatched-block-to-finish

Waiting on asynchronous methods using NSCondition

http://stackoverflow.com/questions/14013947/waiting-on-asynchronous-methods-using-nscondition

How to create a GUID/UUID using the iPhone SDK

http://stackoverflow.com/questions/427180/how-to-create-a-guid-uuid-using-the-iphone-sdk

jessedc / JCPriorityQueue

https://github.com/jessedc/JCPriorityQueue/tree/experimental/heap-queue

Fade/dissolve when changing UIImageView's image

http://stackoverflow.com/questions/7638831/fade-dissolve-when-changing-uiimageviews-image

No-fuss reflections – generating reflections the easy way in iOS

http://aptogo.co.uk/2011/08/no-fuss-reflections/

[ios] the correct behavior of nsoperation waitUntilFinished

from network search: 

think you may have missed expectations for the behavior. If you are expecting the completionBlock to be fired beforewaitUntilFinished releases the control flow, then your expectations are out of alignment. The completion block is dispatched asynchronously back to the success/failure queue, so its not going to be triggered until the run loop spins.

What you can do instead is waitUntilFinished and then access the responsePropertyList and errorproperties of the operation instead of the completion block.