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2014/10/15 ¤U¤È 10:16:01
iphone Programming Glossary: wrappingNSBlockOperation or NSOperation with ALAsset Block to display photo-library images using ALAsset URL http://stackoverflow.com/questions/11580918/nsblockoperation-or-nsoperation-with-alasset-block-to-display-photo-library-imag on the main thread. Since updating the view of an image view is definitely updating the UI this can be simply fixed by wrapping the call with dispatch_async dispatch_get_main_queue ^ self.imageView.image topicImage This puts an asynchronous call on..
UIStringDrawing methods don't seem to be thread safe in iOS 6 http://stackoverflow.com/questions/12744558/uistringdrawing-methods-dont-seem-to-be-thread-safe-in-ios-6 NULL _serialDrawingQueue dispatch_queue_create com.myApp.SerialDrawQueue NULL return _serialDrawingQueue ...and wrapping every draw call like this __block CGSize labelSize CGSizeZero TAUtils sharedUtils serialiseDrawing ^ labelSize label.text..
http://stackoverflow.com/questions/1328638/placeholder-in-uitextview this question I made a few minor modifications to bcd's solution to allow for initialization from a xib file text wrapping and to maintain background color. Hopefully it will save others the trouble. UIPlaceHolderTextView.h #import Foundation..
unichar and NSString - how interchangeable are these? http://stackoverflow.com/questions/1354388/unichar-and-nsstring-how-interchangeable-are-these do it once use the stringWithFormat example Not to sure about the internals of NSString but I'd guess it is probably wrapping a unichar or an array of unichars like a C char A unichar is simply a 16bit value that is used to store a character. Unlike..
Break on EXC_BAD_ACCESS in XCode? http://stackoverflow.com/questions/1622079/break-on-exc-bad-access-in-xcode The BEST way to track these down is use NSZombieEnabled . This works by never actually releasing an object but by wrapping it up as a zombie and setting a flag inside it that says it normally would have been released. This way if you try to access..
http://stackoverflow.com/questions/1656476/new-to-core-data-for-iphone also be useful . I'm just not very experienced with SQL or storing of data in such a manner and am having trouble wrapping my head around how the whole concept of Core Data works and how it connects to everything. Also any better method of doing..
Selecting text in mobile Safari on iPhone http://stackoverflow.com/questions/1899421/selecting-text-in-mobile-safari-on-iphone solution how can I arrange the html to help Safari select the right bit of text easily As opposed to just a word or a wrapping div I've tried onFocus this.select for various elements none seem to work. Also tried onClick. Those who have tried to port..
Pattern for wrapping an Asynchronous JavaScript function to make it synchronous http://stackoverflow.com/questions/214491/pattern-for-wrapping-an-asynchronous-javascript-function-to-make-it-synchronous for wrapping an Asynchronous JavaScript function to make it synchronous I'm working with a JavaScript API where most of the functions..
Cumulative Normal Distribution function in objective C http://stackoverflow.com/questions/2785944/cumulative-normal-distribution-function-in-objective-c
Method for animating images (like a movie) on iPhone without using MPMoviePlayer http://stackoverflow.com/questions/442076/method-for-animating-images-like-a-movie-on-iphone-without-using-mpmovieplayer as needed then removed when done to minimize memory use. You can set the transition duration between frames by wrapping the replaceSublayer with method call in a CATransaction like the following CATransaction begin CATransaction setValue NSNumber..
What is -[NSString sizeWithFont:forWidth:lineBreakMode:] good for? http://stackoverflow.com/questions/455553/what-is-nsstring-sizewithfontforwidthlinebreakmode-good-for specify how big of an area you have to put the text in and then this method tells you how much space it will take up wrapping as required . Also if the string will overflow the bounds of the rect you provide you can tell and then decided how to display.. bounds of the rect you provide you can tell and then decided how to display the text. The reference to it not actually wrapping the text is there because this method doesn't actually do anything to the text. It just virtually lays it out and returns..
Disable UIScrollView scrolling when UITextField becomes first responder http://stackoverflow.com/questions/4585718/disable-uiscrollview-scrolling-when-uitextfield-becomes-first-responder method seems to act on the UIScrollView of the nearest ancestor of the UITextField. So on textFieldDidBeginEditing by wrapping the UITextField with a new UIScrollView with the same size of it that is inserting the view in between the UITextField and..
Rendering to non-power-of-two texture on iPhone http://stackoverflow.com/questions/4760174/rendering-to-non-power-of-two-texture-on-iphone 0 On these devices you should then be able to use non power of two textures as long as you set the proper texture wrapping glTexParameteri GL_TEXTURE_2D GL_TEXTURE_WRAP_S GL_CLAMP_TO_EDGE glTexParameteri GL_TEXTURE_2D GL_TEXTURE_WRAP_T GL_CLAMP_TO_EDGE..
iOS Development: How can I get a Facebook wall post to show in the friend's news feed? http://stackoverflow.com/questions/4777214/ios-development-how-can-i-get-a-facebook-wall-post-to-show-in-the-friends-news of the users friends names and their Facebook ids to the appropriate delegate method from FBRequest its probably worth wrapping this set of results into a set of person objects or storing the returned NSDictionary so that you can retrieve individual..
Is there a way to force horizontal / landscape layout on mobile devices? http://stackoverflow.com/questions/4806938/is-there-a-way-to-force-horizontal-landscape-layout-on-mobile-devices in landscape or portrait mode Step 2 If you're in portrait mode use a webkit transform rotate 90 on a div that's wrapping your entire page to force it into a landscape layout. This won't work quite correctly the browser UI will still be in portrait..
Can you use cancel/isCancelled with GCD/dispatch_async? http://stackoverflow.com/questions/5449469/can-you-use-cancel-iscancelled-with-gcd-dispatch-async a forward jump to a cleanup label like this is often a cleaner solution than the alternatives. If you don't like it wrapping everything in an if block works just as well. Edit I feel the need to further clarify my earlier statement about having..
Transitioning from OpenGL ES 1.1 to OpenGL ES 2.0 http://stackoverflow.com/questions/5866256/transitioning-from-opengl-es-1-1-to-opengl-es-2-0 made it trivial to move that code across to OpenGL ES 2.0. Jeff LaMarche also has an extremely useful helper class for wrapping most of your shader program setup code in his article here . For a great guide on making the transition to OpenGL ES 1.1..
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