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2014/10/15 ¤U¤È 10:03:34
iphone Programming Glossary: allocatingHow to get the RGB values for a pixel on an image on the iphone http://stackoverflow.com/questions/144250/how-to-get-the-rgb-values-for-a-pixel-on-an-image-on-the-iphone Create RGB color space self setColorSpace CGColorSpaceCreateDeviceRGB if colorSpace NSLog @ Error allocating color space. return nil self setPixelData malloc byteCount if pixelData NSLog @ Error allocating bitmap.. allocating color space. return nil self setPixelData malloc byteCount if pixelData NSLog @ Error allocating bitmap memory. Releasing color space. CGColorSpaceRelease colorSpace return nil Create the bitmap context...
How do I detect when someone shakes an iPhone? http://stackoverflow.com/questions/150446/how-do-i-detect-when-someone-shakes-an-iphone these methods and then selecting this new type instead of the base type in IB or using it when allocating a view . In the view controller you want to set this view to become first responder void viewWillAppear..
Difference between [UIImage imageNamed…] and [UIImage imageWithData…]? http://stackoverflow.com/questions/316236/difference-between-uiimage-imagenamed-and-uiimage-imagewithdata in a table view UIImage will only keep a single representation of that image in memory instead of allocating 10 separate objects. On the other hand if you have a very large image and you're not re using it you..
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 after one block is processed it may be after hundreds but probably won't be . So if you are only allocating a few objects don't worry about it. However if you are allocating any significant number of objects.. won't be . So if you are only allocating a few objects don't worry about it. However if you are allocating any significant number of objects and since you are targeting a memory constrained environment then..
View Controllers: How to switch between views programmatically? http://stackoverflow.com/questions/910994/view-controllers-how-to-switch-between-views-programmatically controller for example ViewControllerA I will get no log message on viewDidDisappear. Only when allocating and initializing the ViewControllerA I get an viewDidLoad. But that's it. So all signs stand for the..
How to get the RGB values for a pixel on an image on the iphone http://stackoverflow.com/questions/144250/how-to-get-the-rgb-values-for-a-pixel-on-an-image-on-the-iphone self setPixelCount self.size.width self.size.height Create RGB color space self setColorSpace CGColorSpaceCreateDeviceRGB if colorSpace NSLog @ Error allocating color space. return nil self setPixelData malloc byteCount if pixelData NSLog @ Error allocating bitmap memory. Releasing color space. CGColorSpaceRelease colorSpace.. CGColorSpaceCreateDeviceRGB if colorSpace NSLog @ Error allocating color space. return nil self setPixelData malloc byteCount if pixelData NSLog @ Error allocating bitmap memory. Releasing color space. CGColorSpaceRelease colorSpace return nil Create the bitmap context. Pre multiplied RGBA 8 bits per component. The source..
How do I detect when someone shakes an iPhone? http://stackoverflow.com/questions/150446/how-do-i-detect-when-someone-shakes-an-iphone get the shake event simply by subclassing the view with only these methods and then selecting this new type instead of the base type in IB or using it when allocating a view . In the view controller you want to set this view to become first responder void viewWillAppear BOOL animated shakeView becomeFirstResponder super viewWillAppear..
Difference between [UIImage imageNamed…] and [UIImage imageWithData…]? http://stackoverflow.com/questions/316236/difference-between-uiimage-imagenamed-and-uiimage-imagewithdata you load an image 10 times to display along with some text in a table view UIImage will only keep a single representation of that image in memory instead of allocating 10 separate objects. On the other hand if you have a very large image and you're not re using it you might want to load the image from a data object to make sure..
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 no guarantees as to when the pool will be drained it may be after one block is processed it may be after hundreds but probably won't be . So if you are only allocating a few objects don't worry about it. However if you are allocating any significant number of objects and since you are targeting a memory constrained environment.. one block is processed it may be after hundreds but probably won't be . So if you are only allocating a few objects don't worry about it. However if you are allocating any significant number of objects and since you are targeting a memory constrained environment then you should be creating and draining pools. The documentation..
View Controllers: How to switch between views programmatically? http://stackoverflow.com/questions/910994/view-controllers-how-to-switch-between-views-programmatically Or am I wrong UPDATE I've tested it. If I release the view controller for example ViewControllerA I will get no log message on viewDidDisappear. Only when allocating and initializing the ViewControllerA I get an viewDidLoad. But that's it. So all signs stand for the cleverness of UITabBarController now and I have to figure out..
UIButton in UITableView cell like “Delete Event” http://stackoverflow.com/questions/1076785/uibutton-in-uitableview-cell-like-delete-event iphone uitableview uibutton share improve this question The way you have it now each time a cell is shown you're allocating a button setting its value and adding it to the cell's contentView. When the cell gets reused via dequeueReusableCellWithIdentifier..
Is it better to autorelease or release right after? http://stackoverflow.com/questions/1283324/is-it-better-to-autorelease-or-release-right-after certainly would be on the memory constrained iPhone. Thus you should really use release over autorelease if you're allocating many temporary objects. But for many most uses you wont see any major differences between the two. share improve this answer..
How to get the RGB values for a pixel on an image on the iphone http://stackoverflow.com/questions/144250/how-to-get-the-rgb-values-for-a-pixel-on-an-image-on-the-iphone self.size.height Create RGB color space self setColorSpace CGColorSpaceCreateDeviceRGB if colorSpace NSLog @ Error allocating color space. return nil self setPixelData malloc byteCount if pixelData NSLog @ Error allocating bitmap memory. Releasing.. NSLog @ Error allocating color space. return nil self setPixelData malloc byteCount if pixelData NSLog @ Error allocating bitmap memory. Releasing color space. CGColorSpaceRelease colorSpace return nil Create the bitmap context. Pre multiplied..
How do I detect when someone shakes an iPhone? http://stackoverflow.com/questions/150446/how-do-i-detect-when-someone-shakes-an-iphone the view with only these methods and then selecting this new type instead of the base type in IB or using it when allocating a view . In the view controller you want to set this view to become first responder void viewWillAppear BOOL animated shakeView..
Signal 11, segmentation fault on iphone App exit http://stackoverflow.com/questions/1849929/signal-11-segmentation-fault-on-iphone-app-exit information. When I use the build and analyze function I get some 2 potential memory leaks but in each case I'm allocating an object and keeping it in an array. Any ideas or is this normal iphone segmentation fault exit share improve this question..
How to implement UIScrollView with 1000+ subviews? http://stackoverflow.com/questions/2079225/how-to-implement-uiscrollview-with-1000-subviews pages. As soon as I added 300 pages it became clear that there are performance memory issues with that approach of pre allocating so many subviews. Then I thought may be for my case I should just allocate 3 subviews and instead of hide unhide them. May..
Instruments ObjectAlloc: Explanation of Live Bytes & Overall Bytes http://stackoverflow.com/questions/2154219/instruments-objectalloc-explanation-of-live-bytes-overall-bytes you're probably leaking those objects. You can then confirm by drilling down and seeing the exact line of code that is allocating the objects and even see the time index each one was created. Overall bytes includes memory that has been released. It's..
In CocoaTouch (iPhone OS) how do I find/eliminate leaks that the Instruments Leak tool doesn't find? http://stackoverflow.com/questions/281764/in-cocoatouch-iphone-os-how-do-i-find-eliminate-leaks-that-the-instruments-lea So while Leaks shows me no leaks I suspect there is an issue somewhere. I've also looked at all of the objects I'm allocating and all of them seem to be reclaimed as expected. The only objects I see that keep increasing are GeneralBlock N where N..
Difference between [UIImage imageNamed…] and [UIImage imageWithData…]? http://stackoverflow.com/questions/316236/difference-between-uiimage-imagenamed-and-uiimage-imagewithdata along with some text in a table view UIImage will only keep a single representation of that image in memory instead of allocating 10 separate objects. On the other hand if you have a very large image and you're not re using it you might want to load..
NSMutableArray addObject: -[__NSArrayI addObject:]: unrecognized selector sent to instance http://stackoverflow.com/questions/3220120/nsmutablearray-addobject-nsarrayi-addobject-unrecognized-selector-sent-t and NOTHING is working for me. I tried setting it equal to a newly allocated and initialized NSMutableArray just allocating initializing the variable by itself every combination I could think of and always the same result. Here's the code Object.h..
Understanding the memory consumption on iPhone http://stackoverflow.com/questions/363493/understanding-the-memory-consumption-on-iphone counter and the Gart Object Size agree that the textures should take up somewhere around 5 MB. I am not aware of allocating anything else that would be worth mentioning and the Object Alloc agrees. Where does the memory go I would be glad to supply..
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 be drained it may be after one block is processed it may be after hundreds but probably won't be . So if you are only allocating a few objects don't worry about it. However if you are allocating any significant number of objects and since you are targeting.. hundreds but probably won't be . So if you are only allocating a few objects don't worry about it. However if you are allocating any significant number of objects and since you are targeting a memory constrained environment then you should be creating..
(iphone) UIImageView setImage: leaks? http://stackoverflow.com/questions/4644912/iphone-uiimageview-setimage-leaks
How can I change a cell's textLabel frame? http://stackoverflow.com/questions/4824973/how-can-i-change-a-cells-textlabel-frame attempted at modifying if via using the void tableView UITableView tableView willDisplayCell method . I've also tried allocating a custom label. I could move the custom label but it wouldn't go into separate lines like the original textLabel. I just..
How to get the status of bluetooth (ON/OFF) in iphone programatically http://stackoverflow.com/questions/4955007/how-to-get-the-status-of-bluetooth-on-off-in-iphone-programatically will only work on devices that support the bluetooth LE spec iPhone 4S 5th Generation iPod iPad 3rd Generation Simply allocating the class will cause your application to ask permission to use the bluetooth stack from the user may not be desired and..
What is the difference between these two ways of allocating memory in Objective-C? http://stackoverflow.com/questions/8211075/what-is-the-difference-between-these-two-ways-of-allocating-memory-in-objective is the difference between these two ways of allocating memory in Objective C I am confused about the proper means of allocating memory in Objective C. Suppose I have an NSMutableDictionary... is the difference between these two ways of allocating memory in Objective C I am confused about the proper means of allocating memory in Objective C. Suppose I have an NSMutableDictionary. There are two ways I can initialize it NSMutableDictionary.. the first allocates memory for alpha but what about the second Which of these is recommended as the best practice for allocating memory iphone objective c ios memory management share improve this question NSMutableDictionary dictionary is exactly..
View Controllers: How to switch between views programmatically? http://stackoverflow.com/questions/910994/view-controllers-how-to-switch-between-views-programmatically If I release the view controller for example ViewControllerA I will get no log message on viewDidDisappear. Only when allocating and initializing the ViewControllerA I get an viewDidLoad. But that's it. So all signs stand for the cleverness of UITabBarController..
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