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2014/10/15 ¤U¤È 10:12:58
iphone Programming Glossary: propertiesHow do I create a basic UIButton programmatically? http://stackoverflow.com/questions/1378765/how-do-i-create-a-basic-uibutton-programmatically executing the viewDidLoad method three UIButton s will be created dynamically and its layout or properties are set. iphone uibutton share improve this question Here's one UIButton button UIButton buttonWithType..
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 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..
How to store custom objects in NSUserDefaults http://stackoverflow.com/questions/2315948/how-to-store-custom-objects-in-nsuserdefaults added to support encoding and decoding my objecst void encodeWithCoder NSCoder encoder Encode the properties of the object encoder encodeObject self.name forKey @ name encoder encodeObject self.life forKey @ life.. self.life forKey @ life id initWithCoder NSCoder decoder self super init if self nil decode the properties self.name decoder decodeObjectForKey @ name self.life decoder decodeObjectForKey @ life return self.. with something relevant to your own object void encodeWithCoder NSCoder encoder Encode properties other class variables etc encoder encodeObject self.question forKey @ question encoder encodeObject..
Prefixing property names with an underscore in Objective C [duplicate] http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c you to follow. No matter what since objects still have to send messages to themselves to access properties it's hard to confuse when you're accessing a property or when you're accessing its backing ivar directly.. a property or when you're accessing its backing ivar directly though using the 2.0 dot access to properties does make it more possible. Using the standard message passing syntax makes intent more explicit IMO...
How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar http://stackoverflow.com/questions/4471289/how-to-filter-nsfetchedresultscontroller-coredata-with-uisearchdisplaycontroll incorrect number of sections or rows in sections. Here is what I did I have two FRCs available as properties fetchedResultsController and searchFetchedResultsController. The searchFetchedResultsController should..
Subclass UIButton to add a property http://stackoverflow.com/questions/5500327/subclass-uibutton-to-add-a-property UIButton to add a property I'd like to subclass UIButton to add some properties that i need not methods... only properties . Here the code of my subclass .h @interface MyButton UIButton.. a property I'd like to subclass UIButton to add some properties that i need not methods... only properties . Here the code of my subclass .h @interface MyButton UIButton MyPropertyType property @property nonatomic..
http://stackoverflow.com/questions/554997/cancel-a-uiview-animation setAnimationDuration duration UIView setAnimationCurve UIViewAnimationCurveLinear other animation properties set view properties UIView commitAnimations But before the animation completes and I get the animation.. duration UIView setAnimationCurve UIViewAnimationCurveLinear other animation properties set view properties UIView commitAnimations But before the animation completes and I get the animation ended event I want..
http://stackoverflow.com/questions/6124109/instance-variables-with-underscore-in-objective-c-2-0-and-renaming-with-synthet variable in a cocoa objective c class work I'm using the same convention for instance variable and properties naming as shown by sebnow in his following answer instance variable method argument naming in Objective.. it may be used by category methods Perhaps I should use self.bar aBar But for the readonly properties that can't work and beside that I'm not sure if using the setter in the class itself is a good practice..
Property vs instance variable in Objective-C [duplicate] http://stackoverflow.com/questions/6146244/property-vs-instance-variable-in-objective-c you to follow. No matter what since objects still have to send messages to themselves to access properties it's hard to confuse when you're accessing a property or when you're accessing its backing ivar directly.. a property or when you're accessing its backing ivar directly though using the 2.0 dot access to properties does make it more possible. Using the standard message passing syntax makes intent more explicit IMO...
How do I set up a simple delegate to communicate between two view controllers? http://stackoverflow.com/questions/6168919/how-do-i-set-up-a-simple-delegate-to-communicate-between-two-view-controllers of the view controller class as usual @interface ChildViewController UIViewController Delegate properties should always be weak references See http stackoverflow.com a 4796131 263871 for the rationale Tip If..
How do I get a background location update every n minutes in my iOS application? http://stackoverflow.com/questions/6347503/how-do-i-get-a-background-location-update-every-n-minutes-in-my-ios-application This works in the background as expected based on the configured properties but it seems not possible to force it to update the location every n minutes NSTimer Does work when..
How do I create a basic UIButton programmatically? http://stackoverflow.com/questions/1378765/how-do-i-create-a-basic-uibutton-programmatically programmatically For example in my view controller when executing the viewDidLoad method three UIButton s will be created dynamically and its layout or properties are set. iphone uibutton share improve this question Here's one UIButton button UIButton buttonWithType UIButtonTypeRoundedRect button addTarget self action..
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 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 pixelByteData..
How to store custom objects in NSUserDefaults http://stackoverflow.com/questions/2315948/how-to-store-custom-objects-in-nsuserdefaults if life nil life release life input This code has been added to support encoding and decoding my objecst void encodeWithCoder NSCoder encoder Encode the properties of the object encoder encodeObject self.name forKey @ name encoder encodeObject self.life forKey @ life id initWithCoder NSCoder decoder self super init if self.. encodeObject self.name forKey @ name encoder encodeObject self.life forKey @ life id initWithCoder NSCoder decoder self super init if self nil decode the properties self.name decoder decodeObjectForKey @ name self.life decoder decodeObjectForKey @ life return self void dealloc name release life release super dealloc @end So.. implement the following two methods substituting calls to encodeObject with something relevant to your own object void encodeWithCoder NSCoder encoder Encode properties other class variables etc encoder encodeObject self.question forKey @ question encoder encodeObject self.categoryName forKey @ category encoder encodeObject self.subCategoryName..
Prefixing property names with an underscore in Objective C [duplicate] http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c name as the property indicates that's the pattern they expect you to follow. No matter what since objects still have to send messages to themselves to access properties it's hard to confuse when you're accessing a property or when you're accessing its backing ivar directly though using the 2.0 dot access to properties does make.. access properties it's hard to confuse when you're accessing a property or when you're accessing its backing ivar directly though using the 2.0 dot access to properties does make it more possible. Using the standard message passing syntax makes intent more explicit IMO. @interface Foo NSObject NSNumber bar @property readwrite retain..
How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar http://stackoverflow.com/questions/4471289/how-to-filter-nsfetchedresultscontroller-coredata-with-uisearchdisplaycontroll version of your FRC and you will see exceptions thrown about incorrect number of sections or rows in sections. Here is what I did I have two FRCs available as properties fetchedResultsController and searchFetchedResultsController. The searchFetchedResultsController should not be used unless there is a search when the search is canceled..
Subclass UIButton to add a property http://stackoverflow.com/questions/5500327/subclass-uibutton-to-add-a-property UIButton to add a property I'd like to subclass UIButton to add some properties that i need not methods... only properties . Here the code of my subclass .h @interface MyButton UIButton MyPropertyType property @property nonatomic retain MyPropertyType.. UIButton to add a property I'd like to subclass UIButton to add some properties that i need not methods... only properties . Here the code of my subclass .h @interface MyButton UIButton MyPropertyType property @property nonatomic retain MyPropertyType property @end .m @implementation..
http://stackoverflow.com/questions/554997/cancel-a-uiview-animation action too UIView beginAnimations nil context NULL UIView setAnimationDuration duration UIView setAnimationCurve UIViewAnimationCurveLinear other animation properties set view properties UIView commitAnimations But before the animation completes and I get the animation ended event I want to cancel it cut it short . Is this possible.. beginAnimations nil context NULL UIView setAnimationDuration duration UIView setAnimationCurve UIViewAnimationCurveLinear other animation properties set view properties UIView commitAnimations But before the animation completes and I get the animation ended event I want to cancel it cut it short . Is this possible Googling around..
http://stackoverflow.com/questions/6124109/instance-variables-with-underscore-in-objective-c-2-0-and-renaming-with-synthet Possible Duplicate How does an underscore in front of a variable in a cocoa objective c class work I'm using the same convention for instance variable and properties naming as shown by sebnow in his following answer instance variable method argument naming in Objective C I copy paste his example code here @interface Foo NSObject.. 'Foo' is never used by the methods in its @implementation although it may be used by category methods Perhaps I should use self.bar aBar But for the readonly properties that can't work and beside that I'm not sure if using the setter in the class itself is a good practice or not. I'm not fresh in Objective C but I'm still in the..
Property vs instance variable in Objective-C [duplicate] http://stackoverflow.com/questions/6146244/property-vs-instance-variable-in-objective-c name as the property indicates that's the pattern they expect you to follow. No matter what since objects still have to send messages to themselves to access properties it's hard to confuse when you're accessing a property or when you're accessing its backing ivar directly though using the 2.0 dot access to properties does make.. access properties it's hard to confuse when you're accessing a property or when you're accessing its backing ivar directly though using the 2.0 dot access to properties does make it more possible. Using the standard message passing syntax makes intent more explicit IMO. @interface Foo NSObject NSNumber bar @property readwrite retain..
How do I set up a simple delegate to communicate between two view controllers? http://stackoverflow.com/questions/6168919/how-do-i-set-up-a-simple-delegate-to-communicate-between-two-view-controllers it later. @protocol ChildViewControllerDelegate 2. Declaration of the view controller class as usual @interface ChildViewController UIViewController Delegate properties should always be weak references See http stackoverflow.com a 4796131 263871 for the rationale Tip If you're not using ARC use `assign` instead of `weak` @property..
How do I get a background location update every n minutes in my iOS application? http://stackoverflow.com/questions/6347503/how-do-i-get-a-background-location-update-every-n-minutes-in-my-ios-application options CLLocationManager startUpdatingLocation startMonitoringSignificantLocationChanges This works in the background as expected based on the configured properties but it seems not possible to force it to update the location every n minutes NSTimer Does work when the app is running in the foreground but doesn't seem to be..
How do I create a basic UIButton programmatically? http://stackoverflow.com/questions/1378765/how-do-i-create-a-basic-uibutton-programmatically view controller when executing the viewDidLoad method three UIButton s will be created dynamically and its layout or properties are set. iphone uibutton share improve this question Here's one UIButton button UIButton buttonWithType UIButtonTypeRoundedRect..
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 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..
How to store custom objects in NSUserDefaults http://stackoverflow.com/questions/2315948/how-to-store-custom-objects-in-nsuserdefaults This code has been added to support encoding and decoding my objecst void encodeWithCoder NSCoder encoder Encode the properties of the object encoder encodeObject self.name forKey @ name encoder encodeObject self.life forKey @ life id initWithCoder.. encoder encodeObject self.life forKey @ life id initWithCoder NSCoder decoder self super init if self nil decode the properties self.name decoder decodeObjectForKey @ name self.life decoder decodeObjectForKey @ life return self void dealloc name release.. calls to encodeObject with something relevant to your own object void encodeWithCoder NSCoder encoder Encode properties other class variables etc encoder encodeObject self.question forKey @ question encoder encodeObject self.categoryName forKey..
Prefixing property names with an underscore in Objective C [duplicate] http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c pattern they expect you to follow. No matter what since objects still have to send messages to themselves to access properties it's hard to confuse when you're accessing a property or when you're accessing its backing ivar directly though using the.. when you're accessing a property or when you're accessing its backing ivar directly though using the 2.0 dot access to properties does make it more possible. Using the standard message passing syntax makes intent more explicit IMO. @interface Foo NSObject..
How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar http://stackoverflow.com/questions/4471289/how-to-filter-nsfetchedresultscontroller-coredata-with-uisearchdisplaycontroll thrown about incorrect number of sections or rows in sections. Here is what I did I have two FRCs available as properties fetchedResultsController and searchFetchedResultsController. The searchFetchedResultsController should not be used unless..
Subclass UIButton to add a property http://stackoverflow.com/questions/5500327/subclass-uibutton-to-add-a-property UIButton to add a property I'd like to subclass UIButton to add some properties that i need not methods... only properties . Here the code of my subclass .h @interface MyButton UIButton MyPropertyType.. UIButton to add a property I'd like to subclass UIButton to add some properties that i need not methods... only properties . Here the code of my subclass .h @interface MyButton UIButton MyPropertyType property @property nonatomic retain MyPropertyType..
http://stackoverflow.com/questions/554997/cancel-a-uiview-animation context NULL UIView setAnimationDuration duration UIView setAnimationCurve UIViewAnimationCurveLinear other animation properties set view properties UIView commitAnimations But before the animation completes and I get the animation ended event I want.. setAnimationDuration duration UIView setAnimationCurve UIViewAnimationCurveLinear other animation properties set view properties UIView commitAnimations But before the animation completes and I get the animation ended event I want to cancel it cut it..
http://stackoverflow.com/questions/6124109/instance-variables-with-underscore-in-objective-c-2-0-and-renaming-with-synthet in front of a variable in a cocoa objective c class work I'm using the same convention for instance variable and properties naming as shown by sebnow in his following answer instance variable method argument naming in Objective C I copy paste his.. @implementation although it may be used by category methods Perhaps I should use self.bar aBar But for the readonly properties that can't work and beside that I'm not sure if using the setter in the class itself is a good practice or not. I'm not..
Property vs instance variable in Objective-C [duplicate] http://stackoverflow.com/questions/6146244/property-vs-instance-variable-in-objective-c pattern they expect you to follow. No matter what since objects still have to send messages to themselves to access properties it's hard to confuse when you're accessing a property or when you're accessing its backing ivar directly though using the.. when you're accessing a property or when you're accessing its backing ivar directly though using the 2.0 dot access to properties does make it more possible. Using the standard message passing syntax makes intent more explicit IMO. @interface Foo NSObject..
How do I set up a simple delegate to communicate between two view controllers? http://stackoverflow.com/questions/6168919/how-do-i-set-up-a-simple-delegate-to-communicate-between-two-view-controllers 2. Declaration of the view controller class as usual @interface ChildViewController UIViewController Delegate properties should always be weak references See http stackoverflow.com a 4796131 263871 for the rationale Tip If you're not using ARC..
How do I get a background location update every n minutes in my iOS application? http://stackoverflow.com/questions/6347503/how-do-i-get-a-background-location-update-every-n-minutes-in-my-ios-application startMonitoringSignificantLocationChanges This works in the background as expected based on the configured properties but it seems not possible to force it to update the location every n minutes NSTimer Does work when the app is running in..
How to create classes after creating Core Data model in Xcode for iPhone http://stackoverflow.com/questions/1023769/how-to-create-classes-after-creating-core-data-model-in-xcode-for-iphone to create classes after creating Core Data model in Xcode for iPhone I have created my Model Entities Properties and Relationships in Xcode. How are the classes for my Entities created Do I have to manually create them iphone core data..
Facebook iOS 6 - get user info http://stackoverflow.com/questions/12904079/facebook-ios-6-get-user-info then you use this account to create an SLRequest with the parameters you want here you want the graph object me . Properties @property nonatomic retain ACAccountStore accountStore @property nonatomic retain ACAccount facebookAccount Authenticate..
http://stackoverflow.com/questions/14659563/to-drawrect-or-not-to-drawrect-when-should-one-use-drawrect-core-graphics-vs-su are creating a dynamic graphic that once rendered is used in multiple places I see situations to avoid Core Graphics Properties of your view need to be animated separately You have a relatively small view hierarchy so any perceived extra effort using..
Fetched Properties v Relationships (Core Data - iPhone) http://stackoverflow.com/questions/1737415/fetched-properties-v-relationships-core-data-iphone Properties v Relationships Core Data iPhone I'm a new iPhone developer of about 4 months or so who is starting to look at Core Data...
What is the point of @property and @synthesize? http://stackoverflow.com/questions/3169822/what-is-the-point-of-property-and-synthesize in advance iphone ios4 objective c 2.0 share improve this question The Objective C Programming Language Declared Properties @property declares the getter and the setter methods for the public property you want to implement. For example this property..
What exactly does @synthesize do? http://stackoverflow.com/questions/3266467/what-exactly-does-synthesize-do that belongs to an instance of the class defined in example.h and example.m . mapView is the name of a property . Properties are attributes of an object that can be read or set using the dot notation myObject.mapView . A property doesn't have to..
Implementing Transient Properties http://stackoverflow.com/questions/3553438/implementing-transient-properties Transient Properties I am adding a transient property to my Core Data based app and I think I am missing something. In the Data Model Editor..
Making a Objective-C Wrapper for a C++ Library http://stackoverflow.com/questions/4204239/making-a-objective-c-wrapper-for-a-c-library c code. I wonder what am I missing here. Does it has to be something with the fact I added this to Xcode Target Properties Other Link Flags lstdc lz Or maybe I need to add new flags here Thanks in advance iphone c objective c xcode stl share..
iPhone memory management (with specific examples/questions) http://stackoverflow.com/questions/4543895/iphone-memory-management-with-specific-examples-questions I would for sure have to call retain on it right Like so fooString NSString stringWithFormat @ d items someInt retain Properties I ask about the retain because I'm a bit confused about how @property 's automatic setter works. If I had set fooArray to..
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 key value observing share improve this question Currently it's not possible to use KVO to observe a view's frame. Properties have to be KVO compliant to be observable. Sadly properties of the UIKit framework are generally not observable as with..
When to access property with self and when not to? http://stackoverflow.com/questions/4884231/when-to-access-property-with-self-and-when-not-to when I skip self so I guess it is somehow valid syntax iphone objective c ios self share improve this question Properties are just a convenient way to access the data. So when you are declaring the property @property nonatomic retain SomeType..
When is @property and @synthesize needed? http://stackoverflow.com/questions/5140782/when-is-property-and-synthesize-needed
Using NSMutableDictionary as backing store for properties http://stackoverflow.com/questions/5873776/using-nsmutabledictionary-as-backing-store-for-properties the same as foo obj foo and the latter is exactly the same as obj setFoo foo . There is no KVC code to intercept. Properties are at the language level KVC is at the framework level. You'll need to intercept the accessor messages instead. Consider..
EXC_BAD_ACCESS when copying or retaining Block http://stackoverflow.com/questions/7111541/exc-bad-access-when-copying-or-retaining-block annoying that if I have a property copy which is a Block I have to write the setter method myself. For example With Properties Header @property nonatomic copy void ^cancelledBlock void Implementation @sythesize cancelledBlock leads to EXC_BAD_ACCESS..
Property vs. instance variable http://stackoverflow.com/questions/719788/property-vs-instance-variable is undeclared. Why is that the case Thanks. iphone objective c cocoa cocoa touch share improve this question Properties are just setters and getters for ivars and should almost always be used instead of direct access. @interface APerson NSObject..
Steps to upload an iPhone application to the AppStore http://stackoverflow.com/questions/796482/steps-to-upload-an-iphone-application-to-the-appstore Distribution followed by your name or company name. You may also want to confirm your application identifier in the Properties tab. Most likely you'll have set the identifier properly when debugging with your developer certificate but it never hurts..
What's the best way to use Obj-C 2.0 Properties with mutable objects, such as NSMutableArray? http://stackoverflow.com/questions/816720/whats-the-best-way-to-use-obj-c-2-0-properties-with-mutable-objects-such-as-ns the best way to use Obj C 2.0 Properties with mutable objects such as NSMutableArray I have an Obj C 2.0 class that has an NSMutableArray property. If I use the..
What properties can I set via an UIAppearance proxy? http://stackoverflow.com/questions/9424112/what-properties-can-i-set-via-an-uiappearance-proxy does not list them. Is there a list of these properties iphone ios ios5 ios6 uikit share improve this question Properties that can be set via UIAppearance are tagged with UI_APPEARANCE_SELECTOR in the corresponding header file. To generate a.. 2012 This list hasn't changed up til the most recent version of XCode 4.3.3 . March 12 2013 List updated for SDK 6.1. Properties that apply for iOS 6.0 or greater are listed under the iOS 6.0 tag. Oct. 24 2013 List updated for SDK 7.0. Properties that..
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