我发现我可以这样做:
Protocol* aProtocol = @protocol(NSObject);
但这种技术是怎样的?
例如,你可能拥有一个集装箱,为检查其所有内容都符合议定书提供服务。
Protocol *contentProtocol;
- (void)setContentProtocol:(Protocol *)proto;
然后该集装箱的使用者可以打电话:
[container setContentProtocol:@protocol(MyProtocol)];
在集装箱内的一些地方可以进行检查:
[[item class] conformsToProtocol:contentProtocol];
what is use of Formal Protocol Object
You can use it to check if an object conforms to a protocol.
[anotherObject conformsToProtocol:aProtocol];
I ve got the problem when I tried to do asynchronous requests to server from background thread. I ve never got results of those requests. Simple example which shows the problem: @protocol ...
i have a void, like -(void) doSomething in a specific controller. i can call it in this controller via [self doSomething], but i don t know how to call this void from another .m file. I want to call ...
Is there any way to obfuscate Objective-C Code ? Thanks
Created a View based Project and added a contact to the AddressBook using ABAddressBookRef,ABRecordRef now i wanted to display the added contact ABPersonViewController is the method but how to use in ...
I m pretty new to the Objective-C world and I have a long history with .net/C# so naturally I m inclined to use my C# wits. Now here s the question: I feel really inclined to create some type of ...
I have a simple Core Data app which displays a list of entities in the main window. To create or add new entities, I use a second modal window with a separate managed object context so changes can be ...
I m trying to show a database information in a tableview and then the detailed information in a view my problem is as follow: I created a NSMutableArray: NSMutableArray *myArray = [[NSMutableArray ...
I am writing an iPhone application which requires the user to enter several values that may contain a decimal point (currency values, percentages etc.). The number of decimal places in the values ...