2014/10/15 下午 10:05:06

iphone Programming Glossary: classa.h

How 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

Then there is the header of ClassB. ClassB has to have a reference to ClassA. #import Foundation Foundation.h #import ClassA.h @interface ClassB NSObject ClassA parentObject id initWithClassA ClassA newParentObject @end When the ClassA object creates.. to import those classes in the header files. Use @class in the header files and then use #import only in the .m files ClassA.h @class ClassB @interface ClassA NSObject ClassB childObject @end ClassA.m #import ClassA.h #import ClassB.h @implementation.. only in the .m files ClassA.h @class ClassB @interface ClassA NSObject ClassB childObject @end ClassA.m #import ClassA.h #import ClassB.h @implementation ClassA .. @end ClassB.h @class ClassA @interface ClassB NSObject ClassA parentObject id..

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 downloadUrl.. ClassA alloc init and self.classA.downloadUrl @ ... instead of plain classA 3 In your myApp.m file you need to import ClassA.h when it's missing it will default to a number or pointer in C variables default to int if not found by compiler #import..

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.. #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 instance of ClassB myClassB.delegate..