OC与Swift的相互调用

OC调用Swift方法

1、在 Build Settings 搜索 Packaging ，设置 Defines Module 为 YES

2、新建 LottieBridge.swift 文件，自动生成桥 ProductName-Bridging-Header.h

3、在 LottieBridge.swift 中，定义Swift类继承于OC类，声明 @objcMembers 或 @objc ，实现相关方法

import UIKit
import Lottie

// 所有方法/属性声明
@objcMembers class MyLottieView: UIView {
    private let animationView = LottieAnimationView()

    override init(frame: CGRect) {
        super.init(frame: frame)
        self.addSubview(animationView)
    }

    override func layoutSubviews() {
        super.layoutSubviews()
        animationView.frame = self.bounds
    }

    public func setLottieFromURL(_ url: URL?) {
        if let url = url {
            LottieAnimation.loadedFrom(url: url) { [weak self] (animation) in
                self?.animationView.animation = animation
            }
        }
    }

    public func play() {
        animationView.play()
    }
}

// 单个方法/属性声明
@objc class MyLottieView: UIView {
    private let animationView = LottieAnimationView()

    override init(frame: CGRect) {...}

    override func layoutSubviews() {...}

    @objc public func setLottieFromURL(_ url: URL?) {...}

    @objc public func play() {...}
}

4、在OC代码中引用 ProductName-Swift.h ，调用Swift相关方法

#import "ProductName-Swift.h"

- (void)swiftTest {
    MyLottieView *lottieView = [[MyLottieView alloc] initWithFrame:CGRectMake(100, 100, 320, 320)];
    [self.view addSubview:lottieView];
    
    NSURL *url = [NSURL URLWithString:@"https://assets9.lottiefiles.com/packages/lf20_N0y2Nj.json"];
    [lottieView setLottieFromURL:url];
    
    [lottieView play];
}

Swift调用OC方法

1、在 ProductName-Bridging-Header.h 中加入OC的头声明

#import <YYKit/YYKit.h>
#import <AFNetworking/AFNetworking.h>

2、在Swift代码中调用OC的相关方法

private func OCTest() {
    let configuration = URLSessionConfiguration.default
    _ = AFURLSessionManager(sessionConfiguration: configuration)
}