[ios] uiimage low memory warning for large images

when i load a very large image like > 5M jpg, I got low memory warning, and finally crash.

how to downsize a very large image
https://developer.apple.com/library/ios/samplecode/LargeImageDownsizing/Introduction/Intro.html#//apple_ref/doc/uid/DTS40011173

[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.

[ios] async & thread

exec on thread
http://stackoverflow.com/questions/11582223/ios-ensure-execution-on-main-thread

run task: dispatch queue
http://developer.apple.com/library/ios/#documentation/General/Conceptual/ConcurrencyProgrammingGuide/OperationQueues/OperationQueues.html#//apple_ref/doc/uid/TP40008091-CH102-SW1

[ios] some ui view tips

imageview fit
http://stackoverflow.com/questions/185652/how-to-scale-a-uiimageview-proportionally

uitextview event
http://stackoverflow.com/questions/1426731/how-disable-copy-cut-select-select-all-in-uitextview

i18n
http://www.justaple.com/stapleViewer.html?id=078a7126b7e611e194cf40404112cf76

text wrap with core text in uiview
http://blog.amyworrall.com/post/11098565269/text-wrap-with-core-text

[ios] IBOutlet but no synthesize

In Xcode 4.4 (specifically, the LLVM 4.0 Compiler), synthesis of properties happens by default if there's no @synthesize directive. It's equivalent to:

@synthesize nameField = _nameField;

ffmpeg strip video

ffmpeg strip video, from http://howto-pages.org/ffmpeg/#strip

ffmpeg -i mandelbrot.flv -vn -acodec copy mandelbrot.mp3

convert m4a to mp3

ffmpeg -i xxxx.m4a -acodec libmp3lame -ab 128k xxxx.mp3

Android Eclipse on Ubuntu

1. download Eclipse 4.2.1 linux 64bit, and extract it
2. sudo apt-get install openjdk-6-jdk
3. run eclispe
4. goto Help -> Install New Software
5. add https://dl-ssl.google.com/android/eclipse/ and install
6. download android sdk
7. got an error -> adb: no such file
8. do "sudo apt-get install ia32-libs"

Build directshow strmbase.lib in Windows 8

To build directshow strmbase.lib, here is the step when using dx9b.
Open \dx90bsdk\Samples\C++\DirectShow\BaseClasses\baseclasses.sln
in Visual Studio 2012.
Compile and fix error:
1. add c/c++ prepocessor definitions:

    POINTER_64=__ptr64

2. fix for loop variable declare

outputq.cpp:
for (long iDone = 0;
-->
long iDone;
for (iDone = 0;

winutil.cpp:
for (UINT Count = 0;Count < Result;Count++) {
->
UINT Count = 0;
for (Count = 0;Count < Result;Count++) { 

wxdebug.cpp
static g_dwLastRefresh = 0;
->
static int g_dwLastRefresh = 0;

3. sysclock.cpp, add g_Templates & g_cTemplates to fix link error

//#ifdef FILTER_DLL
/* List of class IDs and creator functions for the class factory. This
   provides the link between the OLE entry point in the DLL and an object
   being created. The class factory will call the static CreateInstance
   function when it is asked to create a CLSID_SystemClock object */
CFactoryTemplate g_Templates[1] = {
    {NULL, &CLSID_SystemClock, CSystemClock::CreateInstance}
};
int g_cTemplates = sizeof(g_Templates) / sizeof(g_Templates[0]);
//#endif