2014/10/15 下午 10:11:16
iphone Programming Glossary: managementWhen should I release objects in -(void)viewDidUnload rather than in -dealloc? http://stackoverflow.com/questions/1158788/when-should-i-release-objects-in-voidviewdidunload-rather-than-in-dealloc the view did unload wouldn't dealloc be called anyway iphone objective c ios cocoa touch memory management share improve this question In addition to what has already been indicated I wanted to elaborate..
Where to place the “Core Data Stack” in a Cocoa/Cocoa Touch application http://stackoverflow.com/questions/1267520/where-to-place-the-core-data-stack-in-a-cocoa-cocoa-touch-application inclination however is to move this code into it's own class whose responsibility is to handle the management of the Core Data Stack. Do you typically encapsulate this functionality within its own class or do you..
EXC_BAD_ACCESS signal received http://stackoverflow.com/questions/327082/exc-bad-access-signal-received your description I suspect the most likely explanation is that you have some error in your memory management. You said you've been working on iPhone development for a few weeks but not whether you are experienced.. come from another background it can take a little while before you really internalise the memory management rules unless you make a big point of it. Remember anything you get from an allocation function usually..
UITextView with Syntax Highlighting [duplicate] http://stackoverflow.com/questions/3642540/uitextview-with-syntax-highlighting . This includes but is not limited to text selection highlight background colors text storage management efficiency spell checking etc. Some of these are provided by system frameworks but still need a lot..
Want to display a 3D model on the iPhone: how to get started? http://stackoverflow.com/questions/413919/want-to-display-a-3d-model-on-the-iphone-how-to-get-started naming things like id that don't make sense and the scary thought that I have to do manual memory management. Where is the best place to start I couldn't find any tutorials for this sort of thing but maybe my..
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 might want to enclose parts of your block 䏭 code in an @autorelease block to handle the memory management for those objects. Although GCD dispatch queues have their own autorelease pools they make no guarantees..
instruments with iOS: Why does Memory Monitor disagree with Allocations? http://stackoverflow.com/questions/5518918/instruments-with-ios-why-does-memory-monitor-disagree-with-allocations be leaking memory but somehow it's exhausting the system resources. Thanks iphone ios ipad memory management xcode instruments share improve this question For those who sees this post after the year 2012 The..
iOS 5 Best Practice (Release/retain?) http://stackoverflow.com/questions/6308425/ios-5-best-practice-release-retain using the release retain of data or should I ignore that Does it matter iphone ios ios5 memory management automatic ref counting share improve this question It's up to you. You can write apps using ARC..
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c though it will click. Here are a few references to get you going Apple's introduction to memory management. Cocoa Programming for Mac OS X 4th Edition by Aaron Hillegas a very well written book with lots of..
Property vs. instance variable http://stackoverflow.com/questions/719788/property-vs-instance-variable can easily distinguish the difference between an ivar and property. So if I want to use the memory management inherited by a synthesized property I'd use something such as myVar @ Foo The other way would be referencing..
To ARC or not to ARC? What are the pros and cons? http://stackoverflow.com/questions/8760431/to-arc-or-not-to-arc-what-are-the-pros-and-cons and non ARC code you will have memory problems. ARC uses KVC naming to make decisions about memory management. If it's all ARC code then it doesn't matter because it will do it the same wrong on both sides. But.. a couple of comments along the lines of using ARC is no substitute for knowing the Cocoa memory management rules. This is mostly true but it's important to understand why and why not. First if all of your code.. a new class in Cocoa today I'd probably spend no more than five minutes on the actual memory management rules and I'd probably only mention the memory management naming rules while discussing KVC naming...
Objective-C ARC: strong vs retain and weak vs assign http://stackoverflow.com/questions/8927727/objective-c-arc-strong-vs-retain-and-weak-vs-assign C ARC strong vs retain and weak vs assign There are two new memory management attributes for properties introduced by ARC strong and weak . Apart from copy which is obviously something..
When should I release objects in -(void)viewDidUnload rather than in -dealloc? http://stackoverflow.com/questions/1158788/when-should-i-release-objects-in-voidviewdidunload-rather-than-in-dealloc is good for Could I not just relase everything in dealloc If the view did unload wouldn't dealloc be called anyway iphone objective c ios cocoa touch memory management share improve this question In addition to what has already been indicated I wanted to elaborate more about logic behind viewDidUnload . One of the most important..
Where to place the “Core Data Stack” in a Cocoa/Cocoa Touch application http://stackoverflow.com/questions/1267520/where-to-place-the-core-data-stack-in-a-cocoa-cocoa-touch-application places the Core Data Stack in the App Delegate. My initial inclination however is to move this code into it's own class whose responsibility is to handle the management of the Core Data Stack. Do you typically encapsulate this functionality within its own class or do you leave it in the App Delegate iphone cocoa cocoa touch core..
EXC_BAD_ACCESS signal received http://stackoverflow.com/questions/327082/exc-bad-access-signal-received c ios xcode cocoa touch share improve this question From your description I suspect the most likely explanation is that you have some error in your memory management. You said you've been working on iPhone development for a few weeks but not whether you are experienced with Objective C in general. If you've come from another.. you are experienced with Objective C in general. If you've come from another background it can take a little while before you really internalise the memory management rules unless you make a big point of it. Remember anything you get from an allocation function usually the static alloc method but there are a few others or a copy..
UITextView with Syntax Highlighting [duplicate] http://stackoverflow.com/questions/3642540/uitextview-with-syntax-highlighting thing. Build the missing link between CoreText and UITextInput . This includes but is not limited to text selection highlight background colors text storage management efficiency spell checking etc. Some of these are provided by system frameworks but still need a lot of integration. File a bug and wait for a nice public API to..
Want to display a 3D model on the iPhone: how to get started? http://stackoverflow.com/questions/413919/want-to-display-a-3d-model-on-the-iphone-how-to-get-started C syntax somewhat confusing with the weird nested method naming things like id that don't make sense and the scary thought that I have to do manual memory management. Where is the best place to start I couldn't find any tutorials for this sort of thing but maybe my Google Fu is weak. Or maybe I should start with learning Objective..
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 If your block creates more than a few Objective C objects you might want to enclose parts of your block 䏭 code in an @autorelease block to handle the memory management for those objects. Although GCD dispatch queues have their own autorelease pools they make no guarantees as to when those pools are drained. If your application..
instruments with iOS: Why does Memory Monitor disagree with Allocations? http://stackoverflow.com/questions/5518918/instruments-with-ios-why-does-memory-monitor-disagree-with-allocations it from running out so quickly My app doesn't appear to be leaking memory but somehow it's exhausting the system resources. Thanks iphone ios ipad memory management xcode instruments share improve this question For those who sees this post after the year 2012 The memory really loaded into device's physical memory is the..
iOS 5 Best Practice (Release/retain?) http://stackoverflow.com/questions/6308425/ios-5-best-practice-release-retain with iOS 5 or older versions Specifically should I continue using the release retain of data or should I ignore that Does it matter iphone ios ios5 memory management automatic ref counting share improve this question It's up to you. You can write apps using ARC Automatic Reference Counting and Xcode will write glue code..
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c I realize all of this is a bit confusing at some point though it will click. Here are a few references to get you going Apple's introduction to memory management. Cocoa Programming for Mac OS X 4th Edition by Aaron Hillegas a very well written book with lots of great examples. It reads like a tutorial. If you're truly diving..
Property vs. instance variable http://stackoverflow.com/questions/719788/property-vs-instance-variable the entire premise behind this strategy is so that one can easily distinguish the difference between an ivar and property. So if I want to use the memory management inherited by a synthesized property I'd use something such as myVar @ Foo The other way would be referencing it via self. ivar property here . The problem with..
To ARC or not to ARC? What are the pros and cons? http://stackoverflow.com/questions/8760431/to-arc-or-not-to-arc-what-are-the-pros-and-cons you did not follow correct KVC naming and you intermix ARC and non ARC code you will have memory problems. ARC uses KVC naming to make decisions about memory management. If it's all ARC code then it doesn't matter because it will do it the same wrong on both sides. But if it's mixed ARC non ARC then there's a mismatch. ARC will.. to ARC as soon as you can and never look back. EDIT I've seen a couple of comments along the lines of using ARC is no substitute for knowing the Cocoa memory management rules. This is mostly true but it's important to understand why and why not. First if all of your code uses ARC and you violate the Three Magic Words all over the.. release them as well so it'll never matter. If I were teaching a new class in Cocoa today I'd probably spend no more than five minutes on the actual memory management rules and I'd probably only mention the memory management naming rules while discussing KVC naming. With ARC I believe you could actually become a decent beginning..
Objective-C ARC: strong vs retain and weak vs assign http://stackoverflow.com/questions/8927727/objective-c-arc-strong-vs-retain-and-weak-vs-assign C ARC strong vs retain and weak vs assign There are two new memory management attributes for properties introduced by ARC strong and weak . Apart from copy which is obviously something completely different are there any differences between..
When should I release objects in -(void)viewDidUnload rather than in -dealloc? http://stackoverflow.com/questions/1158788/when-should-i-release-objects-in-voidviewdidunload-rather-than-in-dealloc in dealloc If the view did unload wouldn't dealloc be called anyway iphone objective c ios cocoa touch memory management share improve this question In addition to what has already been indicated I wanted to elaborate more about logic behind..
Where to place the “Core Data Stack” in a Cocoa/Cocoa Touch application http://stackoverflow.com/questions/1267520/where-to-place-the-core-data-stack-in-a-cocoa-cocoa-touch-application My initial inclination however is to move this code into it's own class whose responsibility is to handle the management of the Core Data Stack. Do you typically encapsulate this functionality within its own class or do you leave it in the App..
EXC_BAD_ACCESS signal received http://stackoverflow.com/questions/327082/exc-bad-access-signal-received this question From your description I suspect the most likely explanation is that you have some error in your memory management. You said you've been working on iPhone development for a few weeks but not whether you are experienced with Objective C.. in general. If you've come from another background it can take a little while before you really internalise the memory management rules unless you make a big point of it. Remember anything you get from an allocation function usually the static alloc..
UITextView with Syntax Highlighting [duplicate] http://stackoverflow.com/questions/3642540/uitextview-with-syntax-highlighting CoreText and UITextInput . This includes but is not limited to text selection highlight background colors text storage management efficiency spell checking etc. Some of these are provided by system frameworks but still need a lot of integration. File..
Want to display a 3D model on the iPhone: how to get started? http://stackoverflow.com/questions/413919/want-to-display-a-3d-model-on-the-iphone-how-to-get-started weird nested method naming things like id that don't make sense and the scary thought that I have to do manual memory management. Where is the best place to start I couldn't find any tutorials for this sort of thing but maybe my Google Fu is weak. Or..
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 Objective C objects you might want to enclose parts of your block 䏭 code in an @autorelease block to handle the memory management for those objects. Although GCD dispatch queues have their own autorelease pools they make no guarantees as to when those..
instruments with iOS: Why does Memory Monitor disagree with Allocations? http://stackoverflow.com/questions/5518918/instruments-with-ios-why-does-memory-monitor-disagree-with-allocations doesn't appear to be leaking memory but somehow it's exhausting the system resources. Thanks iphone ios ipad memory management xcode instruments share improve this question For those who sees this post after the year 2012 The memory really loaded..
iOS 5 Best Practice (Release/retain?) http://stackoverflow.com/questions/6308425/ios-5-best-practice-release-retain should I continue using the release retain of data or should I ignore that Does it matter iphone ios ios5 memory management automatic ref counting share improve this question It's up to you. You can write apps using ARC Automatic Reference..
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c at some point though it will click. Here are a few references to get you going Apple's introduction to memory management. Cocoa Programming for Mac OS X 4th Edition by Aaron Hillegas a very well written book with lots of great examples. It reads..
Property vs. instance variable http://stackoverflow.com/questions/719788/property-vs-instance-variable is so that one can easily distinguish the difference between an ivar and property. So if I want to use the memory management inherited by a synthesized property I'd use something such as myVar @ Foo The other way would be referencing it via self...
To ARC or not to ARC? What are the pros and cons? http://stackoverflow.com/questions/8760431/to-arc-or-not-to-arc-what-are-the-pros-and-cons you intermix ARC and non ARC code you will have memory problems. ARC uses KVC naming to make decisions about memory management. If it's all ARC code then it doesn't matter because it will do it the same wrong on both sides. But if it's mixed ARC non.. back. EDIT I've seen a couple of comments along the lines of using ARC is no substitute for knowing the Cocoa memory management rules. This is mostly true but it's important to understand why and why not. First if all of your code uses ARC and you.. If I were teaching a new class in Cocoa today I'd probably spend no more than five minutes on the actual memory management rules and I'd probably only mention the memory management naming rules while discussing KVC naming. With ARC I believe you..
Objective-C ARC: strong vs retain and weak vs assign http://stackoverflow.com/questions/8927727/objective-c-arc-strong-vs-retain-and-weak-vs-assign C ARC strong vs retain and weak vs assign There are two new memory management attributes for properties introduced by ARC strong and weak . Apart from copy which is obviously something completely different..
Memory Management in Objective-C [duplicate] http://stackoverflow.com/questions/106627/memory-management-in-objective-c Management in Objective C duplicate Possible Duplicates Learn Obj C Memory Management Where are the best explanations of memory management.. Management in Objective C duplicate Possible Duplicates Learn Obj C Memory Management Where are the best explanations of memory management for iPhone I come from a C C background and the dynamic nature of ObjectiveC..
What happens if I don't retain IBOutlet? http://stackoverflow.com/questions/1250518/what-happens-if-i-dont-retain-iboutlet declare properties for all of your IBOutlets for clarity and consistency. The details are spelled out in the Memory Management Programming Guide . The basic gist is when your NIB objects are unarchived the nib loading code will go through and set..
Is calling [self release] allowed to control object lifetime? http://stackoverflow.com/questions/1385433/is-calling-self-release-allowed-to-control-object-lifetime you own it. i.e. the object was obtained with a method starting new or alloc or a method containing copy. Cocoa Memory Management Rules An object must not therefore do self release or self autorelease unless it has previously done self retain . share..
Objective-C/iPhone Memory Management Static Variables http://stackoverflow.com/questions/1606854/objective-c-iphone-memory-management-static-variables C iPhone Memory Management Static Variables I have a static method that creates an instance of the class and puts it in the static variable. I am..
iPhone Development: Grabbing selected/highlighted text on UIWebView http://stackoverflow.com/questions/1968872/iphone-development-grabbing-selected-highlighted-text-on-uiwebview . I went on to search on how to deal with selected highlighted text and found the following Selection and Menu Management To copy or cut something in a view that 𦨴omething must be selected. It can be a range of text an image a URL a color or..
What exactly must I do in viewDidUnload? http://stackoverflow.com/questions/2261972/what-exactly-must-i-do-in-viewdidunload as well as long as you set them to nil when you release them in viewDidUnload . The following quote from the Memory Management section of Apple's UIViewController documentation describes it in more detail ...in iPhone OS 3.0 and later the viewDidUnload..
Dismiss popover using UIbutton http://stackoverflow.com/questions/3565968/dismiss-popover-using-uibutton interfaceOrientation Overriden to allow any orientation. return YES #pragma mark #pragma mark Memory Management void didReceiveMemoryWarning Releases the view if it doesn't have a superview. super didReceiveMemoryWarning Release any..
Learn Obj-C Memory Management [duplicate] http://stackoverflow.com/questions/370427/learn-obj-c-memory-management Obj C Memory Management duplicate Possible Duplicate Where are the best explanations of memory management for iPhone I come from a web development..
How many times do I release an allocated or retained object? http://stackoverflow.com/questions/3730804/how-many-times-do-i-release-an-allocated-or-retained-object
Architectural and design question about uploading photos from iPhone app and S3 http://stackoverflow.com/questions/4481311/architectural-and-design-question-about-uploading-photos-from-iphone-app-and-s3 As I say there the proper solution for accessing AWS from a mobile device is to use the AWS Identity and Access Management service to generate temporary limited privilege access keys for each user. The service is great but it's still in beta for..
Why should I use @properties? [duplicate] http://stackoverflow.com/questions/5602968/why-should-i-use-properties so we use @property declarations to create them automagically rather than writing them by hand. Edit Apple's Memory Management Guide provides a lot of detail about what the accessor methods generated by @property do behind the scenes. share improve..
when is the dealloc method called? http://stackoverflow.com/questions/5630660/when-is-the-dealloc-method-called release NSObject protocol method if the release message results in the receiver's retain count becoming 0 . See Memory Management Programming Guide for more details on the use of these methods. Subclasses must implement their own versions of dealloc..
What are the key concepts for an iPhone Developer to learn? [closed] http://stackoverflow.com/questions/5677655/what-are-the-key-concepts-for-an-iphone-developer-to-learn pickerView didSelectRow inComponent which will allow that object to do something in response to the action. Memory Management Unlike many languages be it Java Javascript or anything in between usually manage memory for you. On iOS Objective C does..
How do i resolve EXC_BAD_ACCESS errors encountered in iphone development http://stackoverflow.com/questions/607222/how-do-i-resolve-exc-bad-access-errors-encountered-in-iphone-development
Why does this create a memory leak (iPhone)? http://stackoverflow.com/questions/612986/why-does-this-create-a-memory-leak-iphone will therefore leak unless it there is a matching release as in the second block . I would suggest you read the Memory Management Programming Guide 2 . Your second code block is correct assuming the property is declared as described above. p.s. You should..
http://stackoverflow.com/questions/8501039/apple-mdm-vendor-csr-signing openssl x509 inform der in AppleWWDRCA.cer out chain.pem As a vendor following sample java code in Mobile Device Management Protocol Reference I sign the customer.csr with the private key extracted from vendor.p12 Using Safari to upload generated..
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