我们整个移动开发团队都在从老的语言向新的语言过度，Android团队所有项目都在使用Kotlin开发了，但是iOS团队还在使用OC开发项目。团队负责人也已经发话了，iOS端从下个新项目开始都要使用swift开发了，对于基本没怎么使用过swift的同学来说，马上用新语言开发项目还是有一定难度、有一定风险的。从OC和swift混编开始，从OC向swift逐渐熟悉过度，是最佳选择，积累的经验，降低了难度，也降低了风险！
苹果在WWDC2014正式发布Swift，目的是用于替代OC语言。在之后的时间里经历了标准库变动，语法的增减，特性变动，几乎每一年 Swift 都会迎来比较大的改动，甚至 API 都发生了变化，让很多第一批吃螃蟹的开发者苦不堪言，戏称《Swift 从入门到重学》。如今已是2020年了，经过 6 年多的不断迭代更新，WWDC2019苹果发布了Swift5.0，苹果终于宣布了Swift的稳定。这标志着Swift这门语言已经趋于稳定，语法已经不会再大变，已经有越来越多的个人和公司在使用Swift，现在也到了重拾Swift的时候了。
1、在OC工程中配置swift需要的基本环境
2、oc和swift页面相互跳转，oc和swift属性相互调用，oc和swift方法相互调用，oc和swift页面delegate相互传值，oc和swift页面block相互传值
1、环境的基本配置
1.1、新建一个基于OC的工程名为OcAndSwift，已经存在的OC工程也是一样的。
1.2、工程配置配置
新建一个OC类OCClass1ViewController
新建一个swift类SwiftClass1ViewController.swift
完整目录结构
2、实现 页面相互跳转返回，属性相互调用，方法相互调用，delegate传值，block传值
2.1、代码实现
ViewController.m
// // ViewController.m // OcAndSwift // // Created by AiRongTang on 2020/9/29. // Copyright © 2020 AiRongTang. All rights reserved. // /** 主界面 */ #import "ViewController.h" #import "OcAndSwift-Swift.h" @interface ViewController ()<SwiftClass1ViewControllerDelegate> @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. self.title = @"主页"; [self createButton]; } /// 创建按钮 -(void)createButton{ //跳转按钮 UIButton *butotn = [UIButton buttonWithType:UIButtonTypeSystem]; [butotn addTarget:self action:@selector(buttonAction:) forControlEvents:UIControlEventTouchUpInside]; butotn.frame = CGRectMake(0, 64, 150, 40); [butotn setTitle:@"跳转到swift1" forState:UIControlStateNormal]; [butotn setTitleColor:[UIColor redColor] forState:UIControlStateNormal]; butotn.tag = 1; [self.view addSubview:butotn]; //调用swift方法的按钮 UIButton *ocCallButton = [UIButton buttonWithType:UIButtonTypeSystem]; [ocCallButton addTarget:self action:@selector(buttonAction:) forControlEvents:UIControlEventTouchUpInside]; ocCallButton.frame = CGRectMake(0, 64+40+10, 150, 40); [ocCallButton setTitle:@"调用swift的方法" forState:UIControlStateNormal]; [ocCallButton setTitleColor:[UIColor redColor] forState:UIControlStateNormal]; ocCallButton.tag = 2; [self.view addSubview:ocCallButton]; } /// 按钮点击事件 /// @param sender 点击的按钮 -(void)buttonAction:(UIButton*)sender{ SwiftClass1ViewController *class1 = [[SwiftClass1ViewController alloc]init]; switch (sender.tag) { case 1:{ //跳转到Swift界面 class1.delegate = self; [self.navigationController pushViewController:class1 animated:YES]; //实现swift类对象的block方法 class1.myBlock = ^(NSString * _Nonnull data) { NSLog(@"myEidtorBlock==%@",data); }; break; } case 2:{ //调用swift的方法 NSString *string = [class1 ocCallMethod:@"ocCallMethod成功"]; NSLog(@"ocCallMethodReturn==%@",string); break; } default: break; } } /// 实现swift类对象的代理方法 /// @param data 接受数据 -(void)delegateMethod1:(NSString *)data{ NSLog(@"delegateMethod1==%@",data); } @endSwiftClass1ViewController.swift
// // SwiftClass1ViewController.swift // OcAndSwift // // Created by AiRongTang on 2020/9/29. // Copyright © 2020 AiRongTang. All rights reserved. // /** Swift界面 */ import UIKit //必须加上@objc 代理才能在oc类中可见。 @objc(SwiftClass1ViewControllerDelegate) protocol SwiftClass1ViewControllerDelegate:NSObjectProtocol { func delegateMethod1(_ data: String); } //必须加上@objcMembers SwiftClass1ViewController中的属性才能在oc类中可见。 @objcMembers class SwiftClass1ViewController: UIViewController, OCClass1ViewControllerDelegate { //定义delegate var delegate:SwiftClass1ViewControllerDelegate? //定义Block typealias SwiftClass1ViewControllerBlock = (_ tttt:String) -> Void var myBlock:SwiftClass1ViewControllerBlock?; override func viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading the view. self.title = "swift界面1"; self.createButton() } /// 创建按钮 func createButton(){ //跳转按钮 let btn = UIButton(frame: CGRect(x: 0, y: 100, width:150, height: 40)) btn.setTitle("跳转到OC界面1", for: .normal); btn.setTitleColor(UIColor.red, for: .normal); btn.tag = 1; view.addSubview(btn); btn.addTarget(self, action: #selector(btnClicked), for: .touchUpInside); //调用OC方法的按钮 let swiftCallButton = UIButton(frame: CGRect(x: 0, y: 100+40+10, width:150, height: 40)) swiftCallButton.setTitle("调用OC的方法", for: .normal); swiftCallButton.setTitleColor(UIColor.red, for: .normal); swiftCallButton.tag = 2; view.addSubview(swiftCallButton); swiftCallButton.addTarget(self, action: #selector(btnClicked(button:)), for: .touchUpInside); //带数据返回按钮 let returnButton = UIButton(frame: CGRect(x: 0, y: 100+40+40+10, width:150, height: 40)) returnButton.setTitle("带数据返回", for: .normal); returnButton.setTitleColor(UIColor.red, for: .normal); returnButton.tag = 3; view.addSubview(returnButton); returnButton.addTarget(self, action: #selector(btnClicked(button:)), for: .touchUpInside); } /// 按钮点击事件 /// - Parameter button: 点击的按钮 @objc func btnClicked(button:UIButton){ let vc = OCClass1ViewController(); switch button.tag { case 1 : //跳转到OC界面 vc.delegate = self; vc.selectConfirmBlock = {(data:String?)in print("selectConfirmBlock==",data!); } self.navigationController?.pushViewController(vc, animated: true); case 2 : //调用OC的方法 let string = vc.swiftCallMethod("swiftCallMethod成功"); print("delegateMethod1==", string); case 3 : //调用delegate返回数据 if delegate != nil { delegate?.delegateMethod1("我是从swift页面返回的delegate数据"); } //调用block返回数据 if (self.myBlock != nil){ self.myBlock!("我是从swift页面返回的block数据"); } self.navigationController?.popViewController(animated: true); default : print("默认case") } } /// 代理方法实现 /// - Parameter data: 接受数据 func delegateMethod1(_ data: String) { print("delegateMethod1==", data); } /// 供OC调用的方法 /// - Parameter data: OC传过来的值 /// - Returns: 返回值 @objc func ocCallMethod(_ data: String) -> String { return data; } /* // MARK: - Navigation // In a storyboard-based application, you will often want to do a little preparation before navigation override func prepare(for segue: UIStoryboardSegue, sender: Any?) { // Get the new view controller using segue.destination. // Pass the selected object to the new view controller. } */ }OCClass1ViewController.h
// // OCClass1ViewController.h // OcAndSwift // // Created by AiRongTang on 2020/9/29. // Copyright © 2020 AiRongTang. All rights reserved. // /** OC界面 */ #import <UIKit/UIKit.h> NS_ASSUME_NONNULL_BEGIN ///Delegate @protocol OCClass1ViewControllerDelegate <NSObject> -(void)delegateMethod1:(NSString *)data; @end ///Block回调 typedef void(^SelectConfirmBlock)(NSString *data); @interface OCClass1ViewController : UIViewController @property (nonatomic, copy) SelectConfirmBlock selectConfirmBlock; @property (nonatomic, weak) id<OCClass1ViewControllerDelegate> delegate; /// 供swift调用的方法 /// @param data swift传过来的值 -(NSString *)swiftCallMethod:(NSString*)data; @end NS_ASSUME_NONNULL_ENDOCClass1ViewController.m
// // OCClass1ViewController.m // OcAndSwift // // Created by AiRongTang on 2020/9/29. // Copyright © 2020 AiRongTang. All rights reserved. // /** OC界面 */ #import "OCClass1ViewController.h" @interface OCClass1ViewController () @end @implementation OCClass1ViewController - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. self.title = @"OC界面1"; [self createButton]; } /// 创建按钮 -(void)createButton{ UIButton *butotn = [UIButton buttonWithType:UIButtonTypeSystem]; [butotn addTarget:self action:@selector(buttonAction:) forControlEvents:UIControlEventTouchUpInside]; butotn.frame = CGRectMake(0, 64, 150, 40); [butotn setTitle:@"带数据返回" forState:UIControlStateNormal]; [butotn setTitleColor:[UIColor redColor] forState:UIControlStateNormal]; [self.view addSubview:butotn]; } /// 按钮点击事件 /// @param sender 点击的按钮 -(void)buttonAction:(UIButton*)sender{ if (self.delegate && [self.delegate respondsToSelector:@selector(delegateMethod1:)]) { [self.delegate delegateMethod1:@"我是从OC页面返回的delegate数据"]; } if (self.selectConfirmBlock) { self.selectConfirmBlock(@"我是从OC页面返回的block数据"); } [self.navigationController popViewControllerAnimated:YES]; } /// 供swift调用的方法 /// @param data swift传过来的值 -(NSString *)swiftCallMethod:(NSString*)data{ return data; } /* #pragma mark - Navigation // In a storyboard-based application, you will often want to do a little preparation before navigation - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { // Get the new view controller using [segue destinationViewController]. // Pass the selected object to the new view controller. } */ @end2.2、操作结果打印
2.3、注意要点
//必须加上@objc 代理才能在oc类中可见。 @objc(SwiftClass1ViewControllerDelegate) //必须加上@objcMembers SwiftClass1ViewController中的属性才能在oc类中可见。 @objcMembers希望大家能喜欢我分享的oc和swift混编这篇文章，希望它能为大家带来帮助。重点在于熟悉关键点的配置以及swift语法的使用。好的技术有很多，好的文章也有很多，只要我们善于总结，乐于分享，发扬人人为我，我为人人的观念，我们大家都会越来越好。
链接：https://blog.csdn.net/u011890139/article/details/108967123
demo链接：https://blog.csdn.net/u011890139/article/details/108967123
