2014/10/15 下午 10:14:41

iphone Programming Glossary: synthesized

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

red byte green byte blue RGBPixel Step 3. I subclassed UIImageView and declared with corresponding synthesized properties Reference to Quartz CGImage for receiver self CFDataRef bitmapData Buffer holding raw pixel..

Prefixing property names with an underscore in Objective C [duplicate]

http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c

can optionally assign a different ivar in the @property declaration but the fact that by default synthesized accessors for a property will access the ivar with the same name as the property indicates that's the.. numberOne NSNumber numberWithInt 1 Both set the value of bar through either the your custom or the synthesized setter method self setBar numberOne self.bar numberOne Both get the value of bar through your synthesized.. setter method self setBar numberOne self.bar numberOne Both get the value of bar through your synthesized or your custom accessor method NSNumber fooBar self bar fooBar self.bar Both manipulate the bar ivar..

Property vs instance variable in Objective-C [duplicate]

http://stackoverflow.com/questions/6146244/property-vs-instance-variable-in-objective-c

Property vs. instance variable

http://stackoverflow.com/questions/719788/property-vs-instance-variable

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..

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

to correspond to a pixel typedef struct RGBPixel byte red byte green byte blue RGBPixel Step 3. I subclassed UIImageView and declared with corresponding synthesized properties Reference to Quartz CGImage for receiver self CFDataRef bitmapData Buffer holding raw pixel data copied from Quartz CGImage held in receiver self UInt8..

Prefixing property names with an underscore in Objective C [duplicate]

http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c

is to use the same name for the ivar as the property. You can optionally assign a different ivar in the @property declaration but the fact that by default synthesized accessors for a property will access the ivar with the same name as the property indicates that's the pattern they expect you to follow. No matter what since objects.. @end @implementation Foo @synthesize bar void baz NSNumber numberOne NSNumber numberWithInt 1 Both set the value of bar through either the your custom or the synthesized setter method self setBar numberOne self.bar numberOne Both get the value of bar through your synthesized or your custom accessor method NSNumber fooBar self bar.. value of bar through either the your custom or the synthesized setter method self setBar numberOne self.bar numberOne Both get the value of bar through your synthesized or your custom accessor method NSNumber fooBar self bar fooBar self.bar Both manipulate the bar ivar directly bar numberOne fooBar bar @end share improve this..

Property vs instance variable in Objective-C [duplicate]

http://stackoverflow.com/questions/6146244/property-vs-instance-variable-in-objective-c

Property vs. instance variable

http://stackoverflow.com/questions/719788/property-vs-instance-variable

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 using the @synthesize myVar..

Does an IBOutlet needs to be a property & synthesized?

http://stackoverflow.com/questions/1221516/does-an-iboutlet-needs-to-be-a-property-synthesized

an IBOutlet needs to be a property synthesized In most examples I see the following setup of IBOutlets Example A FooController.h @interface FooController UIViewController..

Supporting both iOS 6 and iOS 5 autorotation

http://stackoverflow.com/questions/12434992/supporting-both-ios-6-and-ios-5-autorotation

about the methods NSUInteger supportedInterfaceOrientations and BOOL shouldAutorotate that these are ignored and synthesized by the compiler if you also implement the BOOL shouldAutorotateToInterfaceOrientation UIInterfaceOrientation interfaceOrientation..

How do I synthesize sounds with CoreAudio on iPhone/Mac

http://stackoverflow.com/questions/1361148/how-do-i-synthesize-sounds-with-coreaudio-on-iphone-mac

improve this question What you want to do it probably to setup an AudioQueue. It allows you to fill a buffer with synthesized audio data in a callback. You would setup the AudeioQueue to run in a new thread as such #define BUFFER_SIZE 16384 #define..

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

RGBPixel byte red byte green byte blue RGBPixel Step 3. I subclassed UIImageView and declared with corresponding synthesized properties Reference to Quartz CGImage for receiver self CFDataRef bitmapData Buffer holding raw pixel data copied from..

How to send a touch event to iPhone OS?

http://stackoverflow.com/questions/1746452/how-to-send-a-touch-event-to-iphone-os

article Synthesizing a touch event on the iPhone . You may also check out the Three20 framework which I believe used synthesized touch events to test UI elements leading to a rash of recent application rejections due to the use of private APIs . share..

NSMutableArray addObject: -[__NSArrayI addObject:]: unrecognized selector sent to instance

http://stackoverflow.com/questions/3220120/nsmutablearray-addobject-nsarrayi-addobject-unrecognized-selector-sent-t

0x184480' Does anyone have any idea what's going wrong iphone nsmutablearray share improve this question The synthesized setter for @property copy sends a copy message to the array which results in an immutable copy. You have no choice but the..

Prefixing property names with an underscore in Objective C [duplicate]

http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c

as the property. You can optionally assign a different ivar in the @property declaration but the fact that by default synthesized accessors for a property will access the ivar with the same name as the property indicates that's the pattern they expect.. void baz NSNumber numberOne NSNumber numberWithInt 1 Both set the value of bar through either the your custom or the synthesized setter method self setBar numberOne self.bar numberOne Both get the value of bar through your synthesized or your custom.. or the synthesized setter method self setBar numberOne self.bar numberOne Both get the value of bar through your synthesized or your custom accessor method NSNumber fooBar self bar fooBar self.bar Both manipulate the bar ivar directly bar numberOne..

How is retain setter implemented with @synthesize?

http://stackoverflow.com/questions/3924463/how-is-retain-setter-implemented-with-synthesize

160.0f 70.0f 150.0f 310.0f iphone objective c memory management properties retain share improve this question A synthesized retained setter looks like void setValue id newValue if value newValue value release value newValue value retain In your..

NSMutableString as retain/copy

http://stackoverflow.com/questions/4995254/nsmutablestring-as-retain-copy

an issue waiting to happen for a naive implementation since your NSMutableString ivar is now an NSString using default synthesized setter implementation. @property nonatomic retain NSMutableString str1 ` or @property nonatomic copy NSMutableString str1.. copy NSMutableString str1 ` when declaring @property nonatomic retain NSMutableString str1 ` you may use the default synthesized implementation. but there's a twist when declaring @property nonatomic copy NSMutableString str1 ` you should not use the.. but there's a twist when declaring @property nonatomic copy NSMutableString str1 ` you should not use the default synthesized implementation. instead you should write your own void setStr1 NSMutableString arg locking observing undo etc omitted NSMutableString..

NSString @property, using copy instead of retain

http://stackoverflow.com/questions/587414/nsstring-property-using-copy-instead-of-retain

share improve this question Yes it's so that it can make a unique copy without affecting the existing data. The synthesized setters essentially look like this For @synthesize nonatomic retain foo void setFoo NSFoo theFoo theFoo retain retain new..

Property vs instance variable in Objective-C [duplicate]

http://stackoverflow.com/questions/6146244/property-vs-instance-variable-in-objective-c

ObjectiveC ivars or @property

http://stackoverflow.com/questions/6942439/objectivec-ivars-or-property

in header file Correct. You can use private instance variables directly in your implementation 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..

Property vs. instance variable

http://stackoverflow.com/questions/719788/property-vs-instance-variable

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..

iOS SDK : playing music on the background and switching views

http://stackoverflow.com/questions/8467533/ios-sdk-playing-music-on-the-background-and-switching-views

ios xcode ipad share improve this question Make sure myMusic is correctly declared as a retained property and synthesized then try something like this void commonInit NSString musicSonati NSBundle mainBundle pathForResource @ music ofType @ mp3..