下面是具体的实现过程：
1. swift工程中引入OC类。 具体实现过程。
1.1 新建一个swift工程类。 取名 swiftOrOC
1.2 实现的功能为 ： 从swift. viewController.swift 中 push到 OC语言 secondViewController 控制器
1.2.1 新建SecondViewController 类 。
1.2.2 建立桥接文件。 （很重要）
一定要记得点击这个按钮。
1.2.3 接下来工程目录如下：
1.2.4 接下来就可以实现具体的跳转功能了。
ViewController.swift中具体实现
import UIKit class ViewController: UIViewController { @IBOutlet weak var hintLabel: UILabel! //稍后用来显示回调 // push 到 oc controller @IBAction func pushAction(_ sender: AnyObject) { let secondVC = SecondViewController.init() self.navigationController?.pushViewController(secondVC, animated: true) } override func viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading the view, typically from a nib. } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() // Dispose of any resources that can be recreated. } }
1.2.1 首先在 SecondViewController.h 中声明一个协议。具体代码
#import <UIKit/UIKit.h> @protocol SecondDelegate <NSObject> -(void)refreshHintLabel:(NSString *)hintString; @end @interface SecondViewController : UIViewController @property (nonatomic,weak)id<SecondDelegate> secondDelegate; @end
1.2.3 接下来就非常简单了，让ViewController.swift只需要成为SecondViewController的代理，然后遵循她的协议，就可以了。 具体代码如下。
1.2.3.1 遵循协议
1.2.3.2 成为代理，并实现协议方法，更改controller.swift中hintLabel的text。
[objc] view plain copy // push 到 oc controller @IBAction func pushAction(_ sender: AnyObject) { let secondVC = SecondViewController.init() secondVC.secondDelegate = self; self.navigationController?.pushViewController(secondVC, animated: true) } // SecondViewControll的代理方法 func refreshHintLabel(_ hintString: String!) { hintLabel.text = "secondView textView.text = " + hintString; }
1.3.1 具体过程与1.2小节一样。 直接上代码。
1.3.2 声明block;
[objc] view plain copy typedef void(^RefreshHintLabelBlock)(NSString *hintString); @interface SecondViewController : UIViewController @property (nonatomic, copy) RefreshHintLabelBlock hintBlock; @end
1.3.3 block的回调。 SecondViewController.m中
[objc] view plain copy #pragma mark 返回上一页回调 ,将用户输入的用户名传回给 ViewController.swift -(BOOL)navigationShouldPopOnBackButton{ if (_hintBlock) { _hintBlock(textField.text); } return YES; }
1.3.4 在swift类中调用 oc的block.
[objc] view plain copy // push 到 oc controller @IBAction func pushAction(_ sender: AnyObject) { let secondVC = SecondViewController.init() secondVC.secondDelegate = self; secondVC.hintBlock = {(t:String?)in self.hintLabel.text = "secondView textView.text = " + t! } self.navigationController?.pushViewController(secondVC, animated: true) }
工程已上传到git上，git地址： https://github.com/zhonggaorong/SwiftOrOc/tree/master
耽误了不少时间， 今天才开始写oc工程中引入swift类。
demo地址:
https://github.com/jukai9316/OCtoSwift
2.2 如何在OC中实现swift的代理与闭包Block方法 2.2.1 如何在oc中引入swift类。#import "工程名-swift.h" [objc] view plain copy #import "OcOrSwiftTwo-swift.h" 2.2.2 在secondViewController.swift 中实现代理与闭包，代码如下: 注意: @objc(代理名) 才能在外部可见这个代理 [objc] view plain copy import UIKit import Foundation // 必须加上@objc 代理才能在oc类中可见。 @objc(EditTextFieldDelegate) protocol EditTextFieldDelegate:NSObjectProtocol { func editTextField(_ str: String) -> Void } @objc(SecondViewController) class SecondViewController: UIViewController { var editorDelegate:EditTextFieldDelegate? var textField:UITextField? var addButton:UIButton? var pushButton:UIButton? typealias editorBlock = (_ t:String) -> Void var myEidtorBlock:editorBlock? override func viewDidLoad() { super.viewDidLoad() self.view.backgroundColor = UIColor.white textField = UITextField.init(frame: CGRect.init(x: 50, y: 60, width: 200, height: 50)) textField?.placeholder = "输入返回首页的内容" self.view.addSubview(textField!) addButton = UIButton.init(type: .custom) addButton?.setTitleColor(UIColor.black, for: .normal) addButton?.setTitle("pop", for: .normal) addButton?.frame = CGRect.init(x: 50, y: 150, width: 200, height: 50) addButton?.layer.borderColor = UIColor.black.cgColor addButton?.layer.borderWidth = 1.0 addButton?.addTarget(self, action: #selector(popAction), for: .touchUpInside) self.view.addSubview(addButton!) pushButton = UIButton.init(type: .custom) pushButton?.setTitleColor(UIColor.black, for: .normal) pushButton?.setTitle("push", for: .normal) pushButton?.frame = CGRect.init(x: 50, y: 250, width: 200, height: 50) pushButton?.layer.borderColor = UIColor.black.cgColor pushButton?.layer.borderWidth = 1.0 pushButton?.addTarget(self, action: #selector(pushAction), for: .touchUpInside) self.view.addSubview(pushButton!) } func popAction() -> Void { if editorDelegate != nil { editorDelegate?.editTextField((textField?.text)!) } if ((self.myEidtorBlock) != nil){ self.myEidtorBlock!((textField?.text!)!) } self.navigationController?.popViewController(animated: true) } func pushAction() -> Void { let three = ThreeViewController.init() self.navigationController?.pushViewController(three, animated: true) } 2.2.3 在oc类中viewcontroller.m 文件中实现SecondviewController.swift的相关代理与闭包(block). 代码如下: [objc] view plain copy #import "ViewController.h" #import "OcOrSwiftTwo-swift.h" @interface ViewController ()<EditTextFieldDelegate> @property (nonatomic, strong) UITextField *showTextField; @property (nonatomic, strong) UIButton *pushButton; @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; _showTextField = [[UITextField alloc]initWithFrame:CGRectMake(50, 100 , 200, 50)]; _showTextField.placeholder = @"swift传回的文本内容"; _showTextField.adjustsFontSizeToFitWidth = YES; _showTextField.enabled = NO; [self.view addSubview:_showTextField]; _pushButton = [UIButton buttonWithType:UIButtonTypeCustom]; [_pushButton.layer setBorderColor:[UIColor blackColor].CGColor]; [_pushButton.layer setBorderWidth:1.0]; [_pushButton setFrame:CGRectMake(50, 200, 200, 50)]; [_pushButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal]; [_pushButton setTitle:@"push" forState:UIControlStateNormal]; [_pushButton addTarget:self action:@selector(pushAction) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:_pushButton]; } -(void)pushAction{ SecondViewController *second = [[SecondViewController alloc]init]; // second.editorDelegate = self; /* swift中的闭包回滴 */ second.myEidtorBlock = ^(NSString *str) { _showTextField.text = [NSString stringWithFormat:@"second传回信息: %@",str]; }; [self.navigationController pushViewController:second animated:YES]; } #pragma mark swift中的代理 -(void)editTextField:(NSString *)str{ _showTextField.text = [NSString stringWithFormat:@"second传回信息: %@",str]; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. }
