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2014/10/15 ¤U¤È 10:09:34
iphone Programming Glossary: getter@synthesize vs @dynamic, what are the differences? http://stackoverflow.com/questions/1160498/synthesize-vs-dynamic-what-are-the-differences iphone objective c cocoa cocoa touch share improve this question @synthesize will generate getter and setter methods for your property. @dynamic just tells the compiler that the getter and setter methods.. generate getter and setter methods for your property. @dynamic just tells the compiler that the getter and setter methods are implemented not by the class itself but somewhere else like the superclass or..
How to programatically check whether a keyboard is present in iphone app? http://stackoverflow.com/questions/1490573/how-to-programatically-check-whether-a-keyboard-is-present-in-iphone-app NSObject BOOL _isVisible KeyboardStateListener sharedInstance @property nonatomic readonly getter isVisible BOOL visible @end static KeyboardStateListener sharedInstance @implementation KeyboardStateListener..
http://stackoverflow.com/questions/2032826/property-synthesize your class header @property nonatomic retain NSString myString @synthesize creates your setter and getter for your property accessor methods Without synthesize you have to write your own setter and getter implemention.. getter for your property accessor methods Without synthesize you have to write your own setter and getter implemention like getMyString or setMyString capitalize the first character of your property Sam Just..
iPhone ivar naming convention [duplicate] http://stackoverflow.com/questions/2114587/iphone-ivar-naming-convention indicator of private . My take is that NO class local variable should be accessed without a setter getter property and thus they are ALL private given that why not name them in a way easier to read and use..
http://stackoverflow.com/questions/2371489/why-do-you-use-an-underscore-for-an-instance-variable-but-not-its-corresponding this question Reminder The @property directive is equivalent to declaring both a setter and a getter. In the case of level @property CGFloat level can be replaced by CGFloat level void setLevel CGFloat..
Objective-C - When to use 'self' http://stackoverflow.com/questions/2385980/objective-c-when-to-use-self retrieving this value too. In general classes are much less likely to have important code in their getter methods than their setters but it's still possible that accessing directly could break something in..
iVar property, access via self? http://stackoverflow.com/questions/4088801/ivar-property-access-via-self property access via self I understand that when accessing setter getter methods for properties I should be using self setThisValue @ a rather than thisValue @ a However with.. use it rather than accessing the ivar directly. That allows subclasses to override the setter getter and do something different to just fetching the value from the ivar. The only exception is in init methods..
@synthesize vs @dynamic, what are the differences? http://stackoverflow.com/questions/1160498/synthesize-vs-dynamic-what-are-the-differences between implementing a @property with @dynamic or @synthesize iphone objective c cocoa cocoa touch share improve this question @synthesize will generate getter and setter methods for your property. @dynamic just tells the compiler that the getter and setter methods are implemented not by the class itself but somewhere.. cocoa touch share improve this question @synthesize will generate getter and setter methods for your property. @dynamic just tells the compiler that the getter and setter methods are implemented not by the class itself but somewhere else like the superclass or will be provided at runtime . Uses for @dynamic are e.g. with..
How to programatically check whether a keyboard is present in iphone app? http://stackoverflow.com/questions/1490573/how-to-programatically-check-whether-a-keyboard-is-present-in-iphone-app and could be made easier to use. @interface KeyboardStateListener NSObject BOOL _isVisible KeyboardStateListener sharedInstance @property nonatomic readonly getter isVisible BOOL visible @end static KeyboardStateListener sharedInstance @implementation KeyboardStateListener KeyboardStateListener sharedInstance return sharedInstance..
http://stackoverflow.com/questions/2032826/property-synthesize You asked for simple terms @property declares a property in your class header @property nonatomic retain NSString myString @synthesize creates your setter and getter for your property accessor methods Without synthesize you have to write your own setter and getter implemention like getMyString or setMyString capitalize the first.. NSString myString @synthesize creates your setter and getter for your property accessor methods Without synthesize you have to write your own setter and getter implemention like getMyString or setMyString capitalize the first character of your property Sam Just an advice http www.cocoadevcentral.com d learn_objectivec..
iPhone ivar naming convention [duplicate] http://stackoverflow.com/questions/2114587/iphone-ivar-naming-convention have two strong reasons 1 Some people think the _ is a good indicator of private . My take is that NO class local variable should be accessed without a setter getter property and thus they are ALL private given that why not name them in a way easier to read and use autocomplete on Any overlap in names from parameters is quickly..
http://stackoverflow.com/questions/2371489/why-do-you-use-an-underscore-for-an-instance-variable-but-not-its-corresponding iphone objective c cocoa cocoa touch share improve this question Reminder The @property directive is equivalent to declaring both a setter and a getter. In the case of level @property CGFloat level can be replaced by CGFloat level void setLevel CGFloat v Your question Why declare a property named level for a variable..
Objective-C - When to use 'self' http://stackoverflow.com/questions/2385980/objective-c-when-to-use-self self.mainViewController or self mainViewController when retrieving this value too. In general classes are much less likely to have important code in their getter methods than their setters but it's still possible that accessing directly could break something in a future version of Cocoa Touch. share improve this answer..
iVar property, access via self? http://stackoverflow.com/questions/4088801/ivar-property-access-via-self property access via self I understand that when accessing setter getter methods for properties I should be using self setThisValue @ a rather than thisValue @ a However with the example below I can see that adding self documents that..
NSFetchedResultsController with sections created by first letter of a string http://stackoverflow.com/questions/1112521/nsfetchedresultscontroller-with-sections-created-by-first-letter-of-a-string when you need it. Generate the class files for this entity. Don't worry about a setter for this property. Create this getter this is half the magic IMHO THIS ATTRIBUTE GETTER GOES IN YOUR OBJECT MODEL NSString committeeNameInitial self willAccessValueForKey..
@synthesize vs @dynamic, what are the differences? http://stackoverflow.com/questions/1160498/synthesize-vs-dynamic-what-are-the-differences or @synthesize iphone objective c cocoa cocoa touch share improve this question @synthesize will generate getter and setter methods for your property. @dynamic just tells the compiler that the getter and setter methods are implemented.. @synthesize will generate getter and setter methods for your property. @dynamic just tells the compiler that the getter and setter methods are implemented not by the class itself but somewhere else like the superclass or will be provided at..
How to programatically check whether a keyboard is present in iphone app? http://stackoverflow.com/questions/1490573/how-to-programatically-check-whether-a-keyboard-is-present-in-iphone-app KeyboardStateListener NSObject BOOL _isVisible KeyboardStateListener sharedInstance @property nonatomic readonly getter isVisible BOOL visible @end static KeyboardStateListener sharedInstance @implementation KeyboardStateListener KeyboardStateListener..
How to use the first character as a section name http://stackoverflow.com/questions/1741093/how-to-use-the-first-character-as-a-section-name attribute to the applicable entity in the model and check the transient box. There are a few ways to implement the getter. If you are generating creating subclasses then you can add it in the subclass's implementation .m file. Otherwise you can..
http://stackoverflow.com/questions/2026035/lazy-loading-in-objective-c return _ivar In your class add an ivar of the type you need and initialize that to nil in the constructor Create a getter method for that ivar In the getter test for nil. If so create the object. Otherwise just return the reference to it. share..
http://stackoverflow.com/questions/2032826/property-synthesize a property in your class header @property nonatomic retain NSString myString @synthesize creates your setter and getter for your property accessor methods Without synthesize you have to write your own setter and getter implemention like getMyString.. your setter and getter for your property accessor methods Without synthesize you have to write your own setter and getter implemention like getMyString or setMyString capitalize the first character of your property Sam Just an advice http www.cocoadevcentral.com..
iPhone ivar naming convention [duplicate] http://stackoverflow.com/questions/2114587/iphone-ivar-naming-convention the _ is a good indicator of private . My take is that NO class local variable should be accessed without a setter getter property and thus they are ALL private given that why not name them in a way easier to read and use autocomplete on Any..
@property and retain, assign, copy, nonatomic in Objective-C http://stackoverflow.com/questions/2255861/property-and-retain-assign-copy-nonatomic-in-objective-c I read is the BNR iOS Programming book. readwrite vs. readonly readwrite is the default. When you @synthesize both a getter and a setter will be created for you. If you use readonly no setter will be created. Use it for a value you don't want to..
http://stackoverflow.com/questions/2371489/why-do-you-use-an-underscore-for-an-instance-variable-but-not-its-corresponding touch share improve this question Reminder The @property directive is equivalent to declaring both a setter and a getter. In the case of level @property CGFloat level can be replaced by CGFloat level void setLevel CGFloat v Your question Why..
Objective-C - When to use 'self' http://stackoverflow.com/questions/2385980/objective-c-when-to-use-self when retrieving this value too. In general classes are much less likely to have important code in their getter methods than their setters but it's still possible that accessing directly could break something in a future version of..
What exactly does @synthesize do? http://stackoverflow.com/questions/3266467/what-exactly-does-synthesize-do there is a property called mapView . @synthesize mapView mapView1 This line tells the compiler to create a setter and getter for mapView and that they should use the ivar called mapView1 . Without the mapView1 part the compiler would assume that..
iVar property, access via self? http://stackoverflow.com/questions/4088801/ivar-property-access-via-self property access via self I understand that when accessing setter getter methods for properties I should be using self setThisValue @ a rather than thisValue @ a However with the example below.. for an ivar you should use it rather than accessing the ivar directly. That allows subclasses to override the setter getter and do something different to just fetching the value from the ivar. The only exception is in init methods and dealloc...
NSMutableString as retain/copy http://stackoverflow.com/questions/4995254/nsmutablestring-as-retain-copy setter. NSString is the appropriate setter unless you're retaining the string. NSMutableString is also an ambiguous getter see the implementation. does it copy autorelease or retain autorelease there isn't a standard expectation for the general..
http://stackoverflow.com/questions/6942439/objectivec-ivars-or-property But for some strings or object types @properties is used I know that when we set @property cocoa creates some setters getters which are handling the relasing and retaining of the objects. But seems like as for xmlData or connection instance variables.. interface and will cause compiler warnings if used accidentally . when we set @property cocoa creates some setters getters which are handling the relasing and retaining of the objects. Actually no. The @property just declares a property. In order.. retaining of the objects. Actually no. The @property just declares a property. In order to automatically generate the getter and setter you need to @synthesize it. You could alternatively write your own getters and setter which do not even have..
EXC_BAD_ACCESS when copying or retaining Block http://stackoverflow.com/questions/7111541/exc-bad-access-when-copying-or-retaining-block Header @property nonatomic copy void ^cancelledBlock void Implementation @sythesize cancelledBlock saves me doing the getter as well void setCancelledBlock void ^ void aCancelledBlock if cancelledBlock aCancelledBlock return void ^oldValue void..
What properties can I set via an UIAppearance proxy? http://stackoverflow.com/questions/9424112/what-properties-can-i-set-via-an-uiappearance-proxy ' Here is a list that I compiled using the above commands. This is for the 5.0 SDK. The corresponding getter methods have been omitted for brevity. UIActivityIndicatorView @property readwrite nonatomic retain UIColor color UIBarButtonItem..
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