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 ()
@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
NS_ASSUME_NONNULL_BEGIN
///Delegate
@protocol OCClass1ViewControllerDelegate
-(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 delegate;
/// 供swift调用的方法
/// @param data swift传过来的值
-(NSString *)swiftCallMethod:(NSString*)data;
@end
NS_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