2014/10/15 下午 10:04:34

iphone Programming Glossary: beware

http://stackoverflow.com/questions/1263642/releasing-cgimage-cgimageref

instead of specific class release functions like CGImageRelease but purely as a matter of style. I just have to beware of NULL CGImageRelease checks for NULL whereas CFRelease will crash when passed NULL . Using CGImageRelease and its siblings..

Core Data multi thread application

http://stackoverflow.com/questions/2138252/core-data-multi-thread-application

store before getting the object ID. Until saved they're temporary and you can't access them from another thread. And beware of the merge policies if you make changes to the managed objects from more than one thread. NSManagedObjectContext 's mergeChangesFromContextDidSaveNotification..

why most of the objects we create in iphone are pointers

http://stackoverflow.com/questions/3044292/why-most-of-the-objects-we-create-in-iphone-are-pointers

sizes. In C one can use both automatic stack and dynamic heap storage for classes however in the former case one must beware of slicing when a derived type is assigned to a base type resulting in the object losing the content that makes it the derived..

Fast and Lean PDF Viewer for iPhone / iPad / iOs - tips and hints?

http://stackoverflow.com/questions/3889634/fast-and-lean-pdf-viewer-for-iphone-ipad-ios-tips-and-hints

wrap the docRef into a singleton. Cancel needless NSOperations When you can especially if they will be using memory beware of leaving contexts open though Recycle page objects by doing pointer swaps or destroy unused views Close any open Contexts..

UIAlertView starts to show, screen dims, but it doesn't pop up until it's too late!

http://stackoverflow.com/questions/5185223/uialertview-starts-to-show-screen-dims-but-it-doesnt-pop-up-until-its-too-la

tableView has already reloaded Thanks in advance for any insight EDIT To anyone who uses performSelectorInBackground beware of the added complexities of creating what is effectively a threaded program. For example leaks might appear as the new..

iOS Draw Rectagle with curved ends

http://stackoverflow.com/questions/6553804/ios-draw-rectagle-with-curved-ends

with CGContext drawing iphone ios ipad cgcontext share improve this question Something like this untested so beware of bugs void drawRect CGRect rect CGContextRef context UIGraphicsGetCurrentContext CGContextSetStrokeColorWithColor context..

Looking for a way to encode mp3 on iPhone

http://stackoverflow.com/questions/1005598/looking-for-a-way-to-encode-mp3-on-iphone

I know it can be done Thanks in advance for any leads. Ed iphone audio mp3 recording share improve this question Beware with using LAME LAME's GPL licensed so its use is only legal if your app is also GPL. From the 3Gs onwards hardware assisted..

How do I record audio on iPhone with AVAudioRecorder?

http://stackoverflow.com/questions/1010343/how-do-i-record-audio-on-iphone-with-avaudiorecorder

by the user pressing a button on the navBar. The recording uses cd quality 44100 samples stereo 2 channels linear pcm. Beware if you want to use a different format especially an encoded one make sure you fully understand how to set the AVAudioRecorder..

How can I overlap audio files and combine for iPhone in Xcode?

http://stackoverflow.com/questions/12628554/how-can-i-overlap-audio-files-and-combine-for-iphone-in-xcode

NSLog @ AVAssetExportSessionStatusWaiting break default NSLog @ didn't get export status break Beware that I did do this a while ago and you might have to work with it a tiny bit to make it work. But it did work at one point...

How to access the parent view controller?

http://stackoverflow.com/questions/2760679/how-to-access-the-parent-view-controller

or notifications creates a loosely coupled structure and makes reusable classes possible. EDIT Some sample code. Beware untested and from the top of my head DatePickerViewController.h @protocol DatePickerViewControllerDelegate void datePicker..

Invoke native date picker from web-app on iOS/Android

http://stackoverflow.com/questions/4946919/invoke-native-date-picker-from-web-app-on-ios-android

the type to date and return text when reading back that attribute. Alternatively Modernizr can be used for detection. Beware that it's not enough to check for some version like the Samsung Galaxy S2 on Android 4.0.3 does support type date but the..

How to make “suckEffect” to the left corner of iPhone?

http://stackoverflow.com/questions/5272916/how-to-make-suckeffect-to-the-left-corner-of-iphone

iphone ios animation effect share improve this question You can use the undocumented UIView setAnimationPosition . Beware that the suckEffect is undocumented and Apple will reject apps using it. Same for setAnimationPosition . share improve..