项目中我们有时候会遇到一些情况，需要经常使用某个代理，但是又不是都需要遵从协议，这时候就可以用我的这种方式完全解耦，一些小东西，欢迎指点和指指点点。下面直接开始：
要是大家闲看的麻烦，可以直接下载：https://github.com/IDwangluting/DeleagateOperation.git
demo 中 总共用了几个文件 ，
Viewcontroller，
newDeleagte.h,
UIViewController+Protocol,
UIViewController+Delegate
然后viewcontroller 中的代码是这样的：
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 中的代码在下面，这里只有 协议的申明，
import <Foundation/Foundation.h>
@protocol NewDelegate <NSObject>
-(void)viewWillEnter;
-(void)viewDidEnter;
-(void)viewWillOut;
-(void)viewDidOut;
@end
UIViewController+Protocol.h 中的代码是这样的：
import "NewDelegate.h"
@interface UIViewController (Protocol)
@property (nonatomic,assign)id<NewDelegate> delegate ;
-(void)addProtocol ;
-(void)removeDelegate;
@end
UIViewController+Protocol.m 中的代码在下面，这里遵从了协议
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 中的代码在下面，这里实现了代理
import "NewDelegate.h"
@interface UIViewController (Delegate) <NewDelegate>
@end
UIViewController+Delegate.m 中的代码是这样的：
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);
}
其实这是前几天面试的时候，帮别人解决问题时想的一个方案，他当然大喜过望了。希望对大家有用吧！
