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詳解iOS 實(shí)現(xiàn)一對(duì)多代理方案

更新時(shí)間：2022年01月21日 10:04:35 作者：執(zhí)筆續(xù)春秋

本文主要介紹了iOS 實(shí)現(xiàn)一對(duì)多代理方案，文中通過(guò)示例代碼介紹的非常詳細(xì)，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下

實(shí)現(xiàn)方案一

利用可變數(shù)組。簽協(xié)議方需要add到代理的數(shù)組中，然后協(xié)議遍歷數(shù)組中的對(duì)象，進(jìn)行分發(fā)。
缺點(diǎn)是需要數(shù)組對(duì)其內(nèi)部元素是強(qiáng)引用，需要在合適的地方對(duì)其進(jìn)行釋放，否則會(huì)有內(nèi)存泄漏

代理協(xié)議的對(duì)象.h寫法

#import <UIKit/UIKit.h>

NS_ASSUME_NONNULL_BEGIN

@protocol TestSubViewDelegate <NSObject>

- (void)testSendSomeMessageToOther:(NSString *)somethings;

- (void)testSendSome:(NSString *)somethings;

@end


@interface TestSubView : UIView

//@property (nonatomic, weak)id <TestSubViewDelegate>delegate;

@property (nonatomic, strong)NSMutableArray <id<TestSubViewDelegate>>* __nullable delegates;

- (void)addDelegate:(id<TestSubViewDelegate>)delegate;

// 需要在合適的地方銷毀對(duì)象。
- (void)destory;
@end

NS_ASSUME_NONNULL_END

.m代理協(xié)議分發(fā)機(jī)制

#import "TestSubView.h"

@interface TestSubView ()

@end

@implementation TestSubView

- (instancetype)init {
? ? if (self = [super init]) {
? ? ? ? self.delegates = [NSMutableArray array];
? ? ? ??
? ? ? ? // 測(cè)試，執(zhí)行
? ? ? ? dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
? ? ? ? ? ? [self test1DelegateAction];
? ? ? ? });
? ? ? ??
? ? ? ? dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(5 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
? ? ? ? ? ? [self test2DelegateAction];
? ? ? ? });
? ? ? ??
? ? }
? ? return self;
}

// 測(cè)試代理方法分發(fā)1
- (void)test1DelegateAction {
? ? [self.delegates enumerateObjectsUsingBlock:^(id<TestSubViewDelegate> ?_Nonnull delegate, NSUInteger idx, BOOL * _Nonnull stop) {
? ? ? ? if ([delegate respondsToSelector:@selector(testSendSomeMessageToOther:)]) {
? ? ? ? ? ? [delegate testSendSomeMessageToOther:@"傳遞的Some"];
? ? ? ? }
? ? }];
}

// 測(cè)試代理分發(fā)2
- (void)test2DelegateAction {
? ? [self.delegates enumerateObjectsUsingBlock:^(id<TestSubViewDelegate> ?_Nonnull delegate, NSUInteger idx, BOOL * _Nonnull stop) {
? ? ? ? if ([delegate respondsToSelector:@selector(testSendSome:)]) {
? ? ? ? ? ? [delegate testSendSome:@"傳遞的Some2-"];
? ? ? ? }
? ? }];
}


- (void)destory {
? ? [self.delegates removeAllObjects];
? ? self.delegates = nil;
}

- (void)addDelegate:(id<TestSubViewDelegate>)delegate {
? ? [self.delegates addObject:delegate];
}

簽訂代理方1

#import "View1Controller.h"
#import "TestSubView.h"

@interface View1Controller ()<TestSubViewDelegate>

@end

@implementation View1Controller

- (void)viewDidLoad {
? ? [super viewDidLoad];
? ? TestSubView *ts = [TestSubView new];
? ? [ts addDelegate:self];
? ? [self.view addSubview:ts];
}

#pragma mark - TestSubViewDelegate
- (void)testSendSomeMessageToOther:(NSString *)somethings {
? ? NSLog(@"%@", somethings);
}

- (void)testSendSome:(NSString *)somethings {
? ? NSLog(@"%@", somethings);
}
?
@end

簽訂方2

#import "ViewController.h"
#import "View1Controller.h"
#import "TestSubView.h"

@interface ViewController ()<TestSubViewDelegate>

@end

@implementation ViewController

- (void)viewDidLoad {
? ? [super viewDidLoad];
? ? TestSubView *ts = [TestSubView new];
? ? [ts addDelegate:self];
? ? [self.view addSubview:ts];
}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
? ? View1Controller *vc = [View1Controller new];
? ? [self presentViewController:vc animated:YES completion:nil];
}

#pragma mark - TestSubViewDelegate
- (void)testSendSomeMessageToOther:(NSString *)somethings {
? ? NSLog(@"%@", somethings);
}

@end