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2014/10/15 ¤U¤Č 10:05:25
iphone Programming Glossary: concreteWhat happens if I don't retain IBOutlet? http://stackoverflow.com/questions/1250518/what-happens-if-i-dont-retain-iboutlet you used a property that was declared as retain you've still got a valid reference to your textfield. Perhaps a more concrete example would be useful to indicate why you should use a retaining property I'm going to make some assumptions about the..
Difference between NSOperation and NSInvocationOperation? http://stackoverflow.com/questions/12908886/difference-between-nsoperation-and-nsinvocationoperation object ”that is it executes its task once and cannot be used to execute it again. The NSInvocationOperation class is a concrete subclass of NSOperation that manages the execution of a single encapsulated task specified as an invocation. You can use..
http://stackoverflow.com/questions/1667603/mixing-audio-on-the-iphone shall I use I know there are OpenAL and Audio Units that could be useful but which one To get a kick start is there a concrete code snippet for how to do this somewhere Thanks in advance Steve iphone audio share improve this question I recommend..
Key Value Observing with an NSArray http://stackoverflow.com/questions/3478451/key-value-observing-with-an-nsarray and apparently you need to use an NSArrayController which unlike KVO I'm not familiar with but I haven't found concrete examples of how to do this. Can anyone explain with some sample code For instance if I have a GameModel which represents..
iPhone: Create a reusable component (control) that has some Interface Builder pieces and some code http://stackoverflow.com/questions/4036398/iphone-create-a-reusable-component-control-that-has-some-interface-builder-pi of outlets and so on. A little manual rewiring is fine I just don't want to do tons and tons of it. Let me be more concrete and tell you specifically what my control is supposed to do. In my app I sometimes need to hit a web service to validate..
How to create custom easing function with Core Animation? http://stackoverflow.com/questions/5161465/how-to-create-custom-easing-function-with-core-animation but I have no clue how to do that or if it's even possible Are there any alternatives EDIT Here is a concrete example in to steps. Very educational I want to animate an object along a line from point a to b but I want it to bounce..
UITextView ruled line background but wrong line height http://stackoverflow.com/questions/5375350/uitextview-ruled-line-background-but-wrong-line-height self.bounds.size.height self.font.leading Set the line offset from the baseline. I'm sure there's a concrete way to calculate this. CGFloat baselineOffset 6.0f iterate over numberOfLines and draw each line for int x 0 x numberOfLines..
Understanding @Protocols in Objective-C http://stackoverflow.com/questions/5738428/understanding-protocols-in-objective-c is vague. He doesn't thoroughly explain WHY someone would want to use protocols in their programs nor does he give a concrete example with it implemented in a program. He writes You can use a protocol to define methods that you want other people..
Alternative to Singleton in Objective-C for better application design http://stackoverflow.com/questions/5912541/alternative-to-singleton-in-objective-c-for-better-application-design use Singleton If so how do you make your app more testable Updated I think we need to use codes as example for more concrete discussion so much discussions on SO are theory based without a single line of code Let's use the Google Analytics iOS SDK..
UITableView and keyboard scrolling issue http://stackoverflow.com/questions/594181/uitableview-and-keyboard-scrolling-issue view sizes etc... but none of them has worked nicely so far. Could anybody clarify the right way to do this with a concrete code example Thanks in advance Jonathan iphone uitableview keyboard scrolling hide share improve this question The..
Why is autorelease especially dangerous/expensive for iPhone applications? http://stackoverflow.com/questions/613583/why-is-autorelease-especially-dangerous-expensive-for-iphone-applications make this claim and I have even heard that Apple does not recommend it but I have not been able to turn up any concrete sources to back it up. SO references autorelease iphone Why does this create a memory leak iPhone Note I can see from a..
NSDate / NSDateFormatter returning GMT on iPhone iOS 4.3 http://stackoverflow.com/questions/7199807/nsdate-nsdateformatter-returning-gmt-on-iphone-ios-4-3 storeTime dateFormatter stringFromDate now iphone nsdate share improve this question An NSDate represents a concrete point in time regardless of the timezone . Put another way an NSDate does not have a timezone. Timezones are only relevant..
How to make UIScrollView send scrollViewDidScroll messages during animations http://stackoverflow.com/questions/7319906/how-to-make-uiscrollview-send-scrollviewdidscroll-messages-during-animations then any ongoing user interaction of the same properties will still work and surprisingly well I have to say. For my concrete case to keep a dragged view stationary while the UIScrollView scrolls underneath here is how I setup my animation UIView..
Documented process for using facebook connect for the iPhone to upload photos http://stackoverflow.com/questions/750328/documented-process-for-using-facebook-connect-for-the-iphone-to-upload-photos piecing together forum information Facebook sample code and some glue. Hopefully they'll issue something a little more concrete over the next few months. iphone facebook share improve this question For completeness The following explains how to..
http://stackoverflow.com/questions/830218/nsoperation-on-the-iphone on the iPhone I've been looking for some concrete scenarios for when NSOperation on the iPhone is an ideal tool to use in an application. To my understanding this is a wrapper..
How to handle Objective-C protocols that contain properties? http://stackoverflow.com/questions/844678/how-to-handle-objective-c-protocols-that-contain-properties @property readonly NSString title @optional void someMethod @end I've seen this format used instead of writing a concrete superclass that subclasses extend. The question is if you conform to this protocol do you need to synthesize the properties..
Cost of message dispatch in Objective-C http://stackoverflow.com/questions/907843/cost-of-message-dispatch-in-objective-c how much does message dispatch cost in objective C Does it differ when calling through an 'id' versus a pointer to a concrete class objective c iphone share improve this question Objective C messages are very fast. The speed is comparable to..
What are the benefits of using Storyboards instead of xib files in iOS programming? http://stackoverflow.com/questions/9083759/what-are-the-benefits-of-using-storyboards-instead-of-xib-files-in-ios-programmi all I've been able to find on Storyboards are simple tutorials that show you how to set up a Storyboard instead of concrete information explaining what they are. Any information would be greatly appreciated thank you very much for your time and..
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