我尝试在我的应用程序中集成Swift代码。我的应用程序是用Objective-C编写的，我添加了一个Swift类。我做了这里描述的所有事情。但我的问题是Xcode还没有创建-Swift.h文件，只有桥接头。我创建了它，但它实际上是空的。
我可以在Swift中使用我所有的ObjC类，但我不能反之亦然。我用@objc标记了我的swift类，但它没有帮助。我现在该怎么办?
编辑:苹果说:“当你将Swift代码导入Objective-C时，你依靠xcode生成的头文件将这些文件公开给Objective-C。[…此头文件的名称是您的产品模块名称，后跟“-Swift.h”。
现在当我想导入这个文件时，它会给出一个错误:
//MainMenu.m
#import "myProjectModule-Swift.h" //Error: 'myProjectModule-Swift.h' file not found
@implementation MainMenu
这是我的FBManager.swift文件:
@objc class FBManager: NSObject {
var descr = "FBManager class"
init() {
super.init()
}
func desc(){
println(descr)
}
func getSharedGameState() -> GameState{
return GameState.sharedGameState() //OK! GameState is written in Objective-C and no error here
}
}
存档将成功进行测试
如何在objective - c项目或react本地项目中调用swift函数(也可以在swift框架中)
它也适用于react-native
遵循以下步骤:
打开生成设置并检查这些参数:
定义模块:YES
在AppDelegate.h
#import <React/RCTBridgeDelegate.h>
#import <UIKit/UIKit.h>
@class KB;
@interface AppDelegate : UIResponder <UIApplicationDelegate, RCTBridgeDelegate>
@property (strong, nonatomic) KB *appkb;
@end
在AppDelegate.m
#import "AppDelegate.h"
#import "ProductModuleName-Swift.h"
@implementation AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
[self.appkb methodReceiveSwiftClass];
[self.appkb methodEvents:event prop:properties];
}
@end
KB.swift
import Foundation
// import framework if using a swift framework in objective c or react native native modules.
@objc public class KB:NSObject{
@objc public func methodReceiveSwiftClass(){
//write anything here....
}
@objc public func methodEvents(_ event: String, prop: String){
//write anything here
//func with params
}
}
ProjectModuleName-Bridging-Header.h
#import "React/RCTBridgeModule.h"
#import "AppDelegate.h"
我花了大约4个小时试图在我的基于Xcode Objective-C的项目中启用Swift。我的myproject-Swift.h文件创建成功，但我的Xcode没有看到我的swift类。所以，我决定创建一个新的基于Xcode对象的项目，最后，我找到了正确的答案!希望这篇文章能帮助到一些人:-)
Step by Step Swift integration for Xcode object -based project:
Create new *.swift file (in Xcode) or add it by using Finder.
Create an Objective-C bridging header when Xcode asks you about that.
Implement your Swift class:
import Foundation
// use @objc or @objcMembers annotation if necessary
class Foo {
//..
}
Open Build Settings and check these parameters:
Defines Module : YES
Copy & Paste parameter name in a search bar
Product Module Name : myproject
Make sure that your Product Module Name doesn't contain any special characters
Install Objective-C Compatibility Header : YES
Once you've added *.swift file to the project this property will appear in Build Settings
Objective-C Generated Interface Header : myproject-Swift.h
This header is auto-generated by Xcode
Objective-C Bridging Header : $(SRCROOT)/myproject-Bridging-Header.h
Import Swift interface header in your *.m file.
#import "myproject-Swift.h"
Don't pay attention to errors and warnings.
Clean and rebuild your Xcode project.
Profit!
