Definition and use of agents

1. declare an agent where the data needs to be transmitted outside

@protocol nextviewcontrollerdelegate <nsobject>

2. Declaring Proxy methods

-(void) Didloaddatawithmessage: (nsstring *) message; define or affirm

@end//Correspondence @protocol

general proxy definitions in #import < uikit/uikit.h > to between @interface

3. Defining a property implementation The agent can find this proxy through this property (more difficult to understand)

@property (nonatomic, assign)ID<nextviewcontrollerdelegate>delegate;/ /nextviewcontrollerdelegate for your proxy name

4. Proxies are generally used to transmit values and invoke proxies where they need to be passed

[self. Delegate didloaddatawithmessage:@ "hehehe"];//pass hehehe to the implementation agent

5. Introducing proxies where values are required @interface viewcontroller () <nextviewcontrollerdelegate>

6. Define the variable, hang up the proxy (with the class that declares the proxy, define the object, hang up the agent)

nextviewcontroller *nextview = [[nextviewcontroller alloc]init];

5. Hang Up Agent

NextView. delegate = self;

7. Implement the Proxy method receive the value passed over

-(void) Didloaddatawithmessage: (nsstring *) message{

NSLog(@ "%@", message);

label. Text = message;

}

Finally hope to see this article people more comments, in order to improve, of course, I do not mind everyone concerned about me, we learn together, progress together, thank you!

Definition and use of agents