項(xiàng)目中我們有時(shí)候會(huì)遇到一些情況，需要經(jīng)常使用某個(gè)代理，但是又不是都需要遵從協(xié)議，這時(shí)候就可以用我的這種方式完全解耦，一些小東西，歡迎指點(diǎn)和指指點(diǎn)點(diǎn)。下面直接開始：

要是大家閑看的麻煩，可以直接下載：https://github.com/IDwangluting/DeleagateOperation.git

demo 中 總共用了幾個(gè)文件 ，
Viewcontroller，
newDeleagte.h,
UIViewController+Protocol,
UIViewController+Delegate

然后viewcontroller 中的代碼是這樣的：

import "ViewController.h"

import "UIViewController+Delegate.h"
import UIViewController+Protocol.h"

@implementation ViewController

-(void)viewDidLoad {
[super viewDidLoad];
self.delegate = self ;
[self addProtocol];
}

-(void)dealloc {
[self removeDelegate];
}

NewDeleagte.h 中的代碼在下面，這里只有 協(xié)議的申明，

import <Foundation/Foundation.h>

@protocol NewDelegate <NSObject>

-(void)viewWillEnter;

-(void)viewDidEnter;

-(void)viewWillOut;

-(void)viewDidOut;

@end

UIViewController+Protocol.h 中的代碼是這樣的：

import "NewDelegate.h"

@interface UIViewController (Protocol)

@property (nonatomic,assign)id<NewDelegate> delegate ;

-(void)addProtocol ;

-(void)removeDelegate;

@end

UIViewController+Protocol.m 中的代碼在下面，這里遵從了協(xié)議

import "UIViewController+Protocol.h"
import <objc/runtime.h>

@implementation UIViewController (Protocol)

-(void)setDelegate:(id<NewDelegate>)delegate {
objc_setAssociatedObject(self, @selector(delegate), delegate, OBJC_ASSOCIATION_ASSIGN);
}

-(id<NewDelegate>)delegate {
return objc_getAssociatedObject(self, @selector(delegate)); ;
}

-(void)addProtocol {

if (self.delegate  && [self.delegate respondsToSelector:@selector(viewWillEnter)]) {
  [self.delegate viewWillEnter];
}

if (self.delegate  && [self.delegate respondsToSelector:@selector(viewDidEnter)]) {
    [self.delegate viewDidEnter];
}

if (self.delegate  && [self.delegate respondsToSelector:@selector(viewWillOut)]) {
    [self.delegate viewWillOut];
}

if (self.delegate  && [self.delegate respondsToSelector:@selector(viewDidOut)]) {
    [self.delegate viewDidOut];
}

}

-(void)removeDelegate {
self.delegate = nil ;
}

UIViewController+Delegate.h 中的代碼在下面，這里實(shí)現(xiàn)了代理

import "NewDelegate.h"

@interface UIViewController (Delegate) <NewDelegate>

@end

UIViewController+Delegate.m 中的代碼是這樣的：

import "UIViewController+Delegate.h"

@implementation UIViewController (Delegate)

-(void)viewWillEnter {
NSLog(@" line:%d method:%s",LINE,FUNCTION);
}

-(void)viewDidEnter {
NSLog(@" line:%d method:%s",LINE,FUNCTION);
}

-(void)viewWillOut {
NSLog(@" line:%d method:%s",LINE,FUNCTION);
}

-(void)viewDidOut {
NSLog(@" line:%d method:%s",LINE,FUNCTION);
}

其實(shí)這是前幾天面試的時(shí)候，幫別人解決問題時(shí)想的一個(gè)方案，他當(dāng)然大喜過望了。希望對大家有用吧！