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2014/10/15 ¤U¤È 10:05:06
iphone Programming Glossary: classaHow can I solve this Problem with bidirectional dependencies in Objective-C classes? http://stackoverflow.com/questions/834955/how-can-i-solve-this-problem-with-bidirectional-dependencies-in-objective-c-clas bidirectional dependencies in Objective C classes Okay this might be a very silly beginner question but I've got an ClassA which will create an child object from ClassB and assign that to an instance variable. In detail ClassA will alloc and init.. I've got an ClassA which will create an child object from ClassB and assign that to an instance variable. In detail ClassA will alloc and init ClassB in the designated initializer and assign that to the childObject instance variable. It's header.. childObject instance variable. It's header looks like this #import Foundation Foundation.h #import ClassB.h @interface ClassA NSObject ClassB childObject @end Then there is the header of ClassB. ClassB has to have a reference to ClassA. #import Foundation..
How to resolve 'unrecognized selector sent to instance'? http://stackoverflow.com/questions/861626/how-to-resolve-unrecognized-selector-sent-to-instance The particular class is compiled into the static library target. What am I missing Adding some code. static library ClassA.h @interface ClassA NSObject ... NSString downloadUrl @property nonatomic copy NSString downloadUrl ClassA.m @synthesize.. is compiled into the static library target. What am I missing Adding some code. static library ClassA.h @interface ClassA NSObject ... NSString downloadUrl @property nonatomic copy NSString downloadUrl ClassA.m @synthesize downloadUrl In the.. library ClassA.h @interface ClassA NSObject ... NSString downloadUrl @property nonatomic copy NSString downloadUrl ClassA.m @synthesize downloadUrl In the calling app's appDelegate. app delegate header file @interface myApp NSObject UIApplicationDelegate..
Calling a method from another class in Objective C http://stackoverflow.com/questions/9629417/calling-a-method-from-another-class-in-objective-c delegates share improve this question I just happened to see this post while researching. Here is a sample code ClassA.h file #import Foundation Foundation.h #import ClassB.h @interface ClassA NSObject ClassBDelegate @end ClassA.m file #import.. while researching. Here is a sample code ClassA.h file #import Foundation Foundation.h #import ClassB.h @interface ClassA NSObject ClassBDelegate @end ClassA.m file #import ClassA.h @implementation ClassA void createAnInstanceOfClassB ClassB.. code ClassA.h file #import Foundation Foundation.h #import ClassB.h @interface ClassA NSObject ClassBDelegate @end ClassA.m file #import ClassA.h @implementation ClassA void createAnInstanceOfClassB ClassB myClassB ClassB alloc init create an..
what is the difference between Delegate and Notification? http://stackoverflow.com/questions/5325226/what-is-the-difference-between-delegate-and-notification what is the difference between Delegate and Notification i understood like delegate and protocol @protocol classADelegate void DelegateMethod @end classB classADelegate classA ObjOfclassA classA alloc init ObjOfclassA.delegate self while.. and Notification i understood like delegate and protocol @protocol classADelegate void DelegateMethod @end classB classADelegate classA ObjOfclassA classA alloc init ObjOfclassA.delegate self while push later here we have taken the pointer of.. i understood like delegate and protocol @protocol classADelegate void DelegateMethod @end classB classADelegate classA ObjOfclassA classA alloc init ObjOfclassA.delegate self while push later here we have taken the pointer of classB self to..
How to resolve 'unrecognized selector sent to instance'? http://stackoverflow.com/questions/861626/how-to-resolve-unrecognized-selector-sent-to-instance In the calling app's appDelegate. app delegate header file @interface myApp NSObject UIApplicationDelegate ClassA classA @property nonatomic retain ClassA classA app delegate .m file @synthesize classA void applicationDidFinishLaunching UIApplication.. delegate header file @interface myApp NSObject UIApplicationDelegate ClassA classA @property nonatomic retain ClassA classA app delegate .m file @synthesize classA void applicationDidFinishLaunching UIApplication application classA ClassA alloc.. NSObject UIApplicationDelegate ClassA classA @property nonatomic retain ClassA classA app delegate .m file @synthesize classA void applicationDidFinishLaunching UIApplication application classA ClassA alloc init exception occurs here. downloadUrl..
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