ObjectC implements Custom Event

ObjectC implements Custom Event

For cross-class communication, you can use Notification or Event. Here we record the method for implementing Event:
First, the defined class must be inherited from UIControl.

Header file of the SocketUtils class sub-controlSocketUtils

# Import
  
   
# Import "AsyncSocket. h "@ interface SocketUtils: UIControl {} enum {UIControlEventAlert = 0x00000001 <25, // customizable from 24 to 27 UIControlEventError = 0x00000001 <26 };
  

SocketUtils. m file

How to trigger an event:

[self sendActionsForControlEvents:UIControlEventAlert];

Use the target Class header file of SocketUtils

#import 
  
   #import "WasherSocketUtils.h"@interface Head : UIView@property (nonatomic,strong)SocketUtils* SocketUtils;
  

M file

# Import "Head. h "@ implementation Head @ synthesize SocketUtils = _ SocketUtils;-(id) init {_ SocketUtils = [[SocketUtils alloc] init]; // register an event, this sentence is critical to [_ SocketUtils addTarget: self action: @ selector (socketEvent :) forControlEvents: UIControlEventAlert]; return [super init];}-(void) socketEvent :( SocketUtils *) paramSender {NSLog (@ "event by xie: % @", paramSender );}