oc项目中使用swift

一、为什么写这篇文章

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！

二、Swift目前现状

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。

三、本篇文章主要内容

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);
}@end

SwiftClass1ViewController.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delegatevar delegate:SwiftClass1ViewControllerDelegate?//定义Blocktypealias SwiftClass1ViewControllerBlock = (_ tttt:String) -> Voidvar 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?)inprint("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 navigationoverride 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;@endNS_ASSUME_NONNULL_END

OCClass1ViewController.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.}*/@end

2.2、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

四、最后

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。

CSDN链接：https://blog.csdn.net/u011890139/article/details/108967123

demo链接：https://blog.csdn.net/u011890139/article/details/108967123