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2014/10/15 ¤U¤È 10:13:34
iphone Programming Glossary: ruleCore Data - Storing Images (iPhone) http://stackoverflow.com/questions/2090028/core-data-storing-images-iphone who has attempted this. iphone design image core data storage share improve this question The rule for storing image data in Core Data is as follows 100 kb store in the related entity person address..
iPhone image stretching (skew) http://stackoverflow.com/questions/2351586/iphone-image-stretching-skew a trapezoid. p1 p2 p1 p2 p3 p4 p3 p4' Another to the vertical direction. A naive transformation rule is y c x' x p1.x ”——————†p1.x p1.y c y' y where c is the y coordinate of the intersection point.. to the actual 3D vector x w y w z w before projection if CA follows usual 3D compute graphics rules so you could cheat by using the transform P . . Q x x' . R . S y y' . . 1 . z z' . T . U 1 w' with..
Install xCode 3.2.3 w/ iPhone SDK 4, get “Base SDK missing”, can't see other SDKs http://stackoverflow.com/questions/3161385/install-xcode-3-2-3-w-iphone-sdk-4-get-base-sdk-missing-cant-see-other-sdk 3.2.4 upgrade which has a strongly related problem you might want to confer here . One SDK to rule them all Here's the deal 4.0 is now the only SDK version allowed for submitting new or updated iPhone..
Do you need to create an NSAutoreleasePool within a block in GCD? http://stackoverflow.com/questions/4141123/do-you-need-to-create-an-nsautoreleasepool-within-a-block-in-gcd an NSAutoreleasePool for that thread or operation because none exists by default. Does the same rule apply to a block that is placed within a Grand Central Dispatch queue and will be run on a non main.. iphone objective c cocoa osx grand central dispatch share improve this question Does the same rule apply to a block that is placed within a Grand Central Dispatch queue and will be run on a non main..
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c they were using. Assuming everyone is playing along and retaining releasing according to the rules when one piece of code retains and then releases the object any other piece of code also referencing.. confusing is knowing the circumstances under which you should call retain and release . My general rule of thumb is that if I want to hang on to an object for some length of time if it's a member variable..
`[super viewDidLoad]` convention http://stackoverflow.com/questions/844195/super-viewdidload-convention etc... Any thoughts iphone objective c cocoa cocoa touch share improve this question My rule of thumb is if you're doing something related to initialization always call the super class's method..
Core Data - Storing Images (iPhone) http://stackoverflow.com/questions/2090028/core-data-storing-images-iphone for any advice on the approach and pitfalls from anyone who has attempted this. iphone design image core data storage share improve this question The rule for storing image data in Core Data is as follows 100 kb store in the related entity person address whatever . 1 mb store in a separate entity on the other end..
iPhone image stretching (skew) http://stackoverflow.com/questions/2351586/iphone-image-stretching-skew it can be done in two steps. One to convert the square into a trapezoid. p1 p2 p1 p2 p3 p4 p3 p4' Another to the vertical direction. A naive transformation rule is y c x' x p1.x ”——————†p1.x p1.y c y' y where c is the y coordinate of the intersection point of the lines joining p1 and p3 and p2 and p4. Now notice.. transform either. However the vector x y z w 1 will be converted to the actual 3D vector x w y w z w before projection if CA follows usual 3D compute graphics rules so you could cheat by using the transform P . . Q x x' . R . S y y' . . 1 . z z' . T . U 1 w' with appropriate P Q R S T U that maps the 4 points to the expected..
Install xCode 3.2.3 w/ iPhone SDK 4, get “Base SDK missing”, can't see other SDKs http://stackoverflow.com/questions/3161385/install-xcode-3-2-3-w-iphone-sdk-4-get-base-sdk-missing-cant-see-other-sdk on this issue. If you are specifically interested in the Xcode 3.2.4 upgrade which has a strongly related problem you might want to confer here . One SDK to rule them all Here's the deal 4.0 is now the only SDK version allowed for submitting new or updated iPhone only apps. This is direct from Apple's iOS 4 Readiness Checklist..
Do you need to create an NSAutoreleasePool within a block in GCD? http://stackoverflow.com/questions/4141123/do-you-need-to-create-an-nsautoreleasepool-within-a-block-in-gcd run an NSOperation on an NSOperationQueue you need to create an NSAutoreleasePool for that thread or operation because none exists by default. Does the same rule apply to a block that is placed within a Grand Central Dispatch queue and will be run on a non main thread That is do you need to create an NSAutoreleasePool within.. wondering if someone could point out where this is stated. iphone objective c cocoa osx grand central dispatch share improve this question Does the same rule apply to a block that is placed within a Grand Central Dispatch queue and will be run on a non main thread That is do you need to create an NSAutoreleasePool within..
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c other parts of the system crashing because you've freed memory they were using. Assuming everyone is playing along and retaining releasing according to the rules when one piece of code retains and then releases the object any other piece of code also referencing the object will be unaffected. What can sometimes be confusing.. the object will be unaffected. What can sometimes be confusing is knowing the circumstances under which you should call retain and release . My general rule of thumb is that if I want to hang on to an object for some length of time if it's a member variable in a class for instance then I need to make sure the object's..
`[super viewDidLoad]` convention http://stackoverflow.com/questions/844195/super-viewdidload-convention all of UIViewControllers delegate methods willAppear didAppear etc... Any thoughts iphone objective c cocoa cocoa touch share improve this question My rule of thumb is if you're doing something related to initialization always call the super class's method first if you are going to call it at all . This gives the super..
Full webpage and disabled zoom viewport meta tag for all mobile browsers http://stackoverflow.com/questions/11345896/full-webpage-and-disabled-zoom-viewport-meta-tag-for-all-mobile-browsers scale 1.0 width device width height device height target densitydpi device dpi user scalable yes Android 4.x Same rule apply as 2.3.x except the min and max scales are not honored anymore and if you use user scalable yes the user can always..
Build for armv6 architecture (target iOS 3.1.3) with iOS 6 SDK and Xcode 4.5? http://stackoverflow.com/questions/12533544/build-for-armv6-architecture-target-ios-3-1-3-with-ios-6-sdk-and-xcode-4-5 be built. If I add armv6 working in devices until the iPhone 3G manually there are several warnings as well warning no rule to process file ' PROJECT_DIR main.m' of type sourcecode.c.objc for architecture armv6 ... ... warning architecture armv6..
NSNotificationCenter vs delegation( using protocols )? http://stackoverflow.com/questions/1927965/nsnotificationcenter-vs-delegation-using-protocols I use them specifically iphone objective c delegates protocols nsnotifications share improve this question The rule of thumb here is how many clients would like to be notified of an event. If it's mainly one object e.g. to dismiss a view..
Core Data - Storing Images (iPhone) http://stackoverflow.com/questions/2090028/core-data-storing-images-iphone from anyone who has attempted this. iphone design image core data storage share improve this question The rule for storing image data in Core Data is as follows 100 kb store in the related entity person address whatever . 1 mb store..
iPhone image stretching (skew) http://stackoverflow.com/questions/2351586/iphone-image-stretching-skew the square into a trapezoid. p1 p2 p1 p2 p3 p4 p3 p4' Another to the vertical direction. A naive transformation rule is y c x' x p1.x ”——————†p1.x p1.y c y' y where c is the y coordinate of the intersection point of the lines joining.. z w 1 will be converted to the actual 3D vector x w y w z w before projection if CA follows usual 3D compute graphics rules so you could cheat by using the transform P . . Q x x' . R . S y y' . . 1 . z z' . T . U 1 w' with appropriate P Q R S..
How to reduce the size of my iPhone application? http://stackoverflow.com/questions/2490910/how-to-reduce-the-size-of-my-iphone-application Alternative Titles to aid searches Compressing PNGs Reduce the size of an iPhone Archive .ipa Adding a build rule to compress images in Xcode iOS Apps can only be downloaded via 3G if they are less than 100MB. What are the best strategies..
http://stackoverflow.com/questions/2545542/font-size-render-in-iphone so that it's readable on screen by default it has different default styles to other browsers. I don't know the exact rules but when it comes to font sizes it seems to work like this Text inside a paragraph list item or other 'text' element Apply.. inside a DIV or other non specific element Treat as 'plain text' and 'adapt' the size according to Mobile Safari's rules. So the short answer is wrap your text in a paragraph and apply the font size rule to that. Here's a quick and dirty example.. size according to Mobile Safari's rules. So the short answer is wrap your text in a paragraph and apply the font size rule to that. Here's a quick and dirty example Recommended Put this in an external stylesheet style type text css p font size..
CoreData : store images to DB or not? http://stackoverflow.com/questions/2573072/coredata-store-images-to-db-or-not images in a usable format such as PNG or JPEG instead of NSData. This will save you a lot of headaches. Second the rule for storing binary data is 100kb store in the same table as the relevant data 1mb store in a separate table attached via..
Install xCode 3.2.3 w/ iPhone SDK 4, get “Base SDK missing”, can't see other SDKs http://stackoverflow.com/questions/3161385/install-xcode-3-2-3-w-iphone-sdk-4-get-base-sdk-missing-cant-see-other-sdk interested in the Xcode 3.2.4 upgrade which has a strongly related problem you might want to confer here . One SDK to rule them all Here's the deal 4.0 is now the only SDK version allowed for submitting new or updated iPhone only apps. This is..
Do you need to create an NSAutoreleasePool within a block in GCD? http://stackoverflow.com/questions/4141123/do-you-need-to-create-an-nsautoreleasepool-within-a-block-in-gcd you need to create an NSAutoreleasePool for that thread or operation because none exists by default. Does the same rule apply to a block that is placed within a Grand Central Dispatch queue and will be run on a non main thread That is do you.. this is stated. iphone objective c cocoa osx grand central dispatch share improve this question Does the same rule apply to a block that is placed within a Grand Central Dispatch queue and will be run on a non main thread That is do you..
http://stackoverflow.com/questions/4194394/client-server-gksessions documentation focusses on the P2P mode which can be confusing to newcomers. Again P2P is incredibly clever but as a rule you do not want the P2P mode. You want a normal clients with server spoke model which is incedibly easier to program. Hope..
Getting displacement from accelerometer data with Core Motion http://stackoverflow.com/questions/4449565/getting-displacement-from-accelerometer-data-with-core-motion and the tiny neglectable error will outrun the true value. I would strongly recommend to not rely on trapezoidal rule but to use at least Simpson or a higher degree Newton Cotes formula. If you managed this you will have to keep an eye on.. this you will have to keep an eye on setting up the right low pass filtering. I cannot give a general value but as a rule of thumb experimenting with filtering factors between 0.2 and 0.8 will be a good starting point. The right value depends..
Use Key Value Observing to get a KVO callback on a UIView's frame http://stackoverflow.com/questions/4874288/use-key-value-observing-to-get-a-kvo-callback-on-a-uiviews-frame implement it in the custom objects of your application including custom views. There are a few exceptions to this rule like NSOperationQueue's operations property but they have to be explicitly documented. Even if using KVO on a view's properties..
What is the AppDelegate for and how do I know when to use it? http://stackoverflow.com/questions/652460/what-is-the-appdelegate-for-and-how-do-i-know-when-to-use-it work on iPhone apps. How do I know when I should be putting stuff in the appdelegate versus a custom class Is there a rule or any type of analogy with another programming language like python or php that uses an appdelegate like pattern objective..
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c you've freed memory they were using. Assuming everyone is playing along and retaining releasing according to the rules when one piece of code retains and then releases the object any other piece of code also referencing the object will be.. can sometimes be confusing is knowing the circumstances under which you should call retain and release . My general rule of thumb is that if I want to hang on to an object for some length of time if it's a member variable in a class for instance..
http://stackoverflow.com/questions/6942439/objectivec-ivars-or-property file. However since synthesized properties come with free memory management you might as well take advantage. My rule of thumb is to use the ivar directly until the first time I find myself writing ivar release ivar newIvar retain As Sam..
iPhone UIWebView local resources using Javascript and handling onorientationChange http://stackoverflow.com/questions/843820/iphone-uiwebview-local-resources-using-javascript-and-handling-onorientationchan iphone web share improve this question The answer can be traced from the warning I was getting in XCode warning no rule to process file ' PROJECT_DIR html orientation.js' of type sourcecode.javascript for architecture i386 XCode setup .js javascript..
`[super viewDidLoad]` convention http://stackoverflow.com/questions/844195/super-viewdidload-convention willAppear didAppear etc... Any thoughts iphone objective c cocoa cocoa touch share improve this question My rule of thumb is if you're doing something related to initialization always call the super class's method first if you are going..
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