[英]use_native_modules! skipped the react-native dependency 'react-native-beacons-manager'. No podspec file was found
[英]Dependency Injection in React Native modules
我们正在逐步将我的应用程序转换为React Native。 我一直在iOS上的React Native中遇到依赖注入问题。
我在我的应用程序中有一些服务,我想在本机模块中使用。 目前,它们是通过台风注入的,一切正常。
但是,react native本身会将任何本机模块初始化并维护为单例。 这使我无法让Typhoon初始化它们,因此我无法将依赖关系注入其中。
可以做些什么? 自己创建RCTBridge是一个选项,但感觉非常低级,并且仍然需要弄清楚如何将其注入到UIView中。
我不确定为什么你的问题没有获得更多的选票; 我自己也在努力回答同样的问题,并认为我应该继续回答我的第一个StackOverflow问题!
围绕RCTBridge类进行挖掘提供了答案。 您需要做的是使用实现RCTBridgeProtocol的类的实例手动初始化RCTBridge(重要的是方法'extraModulesForBridge';如果您愿意,甚至可以在View Controller中实现此协议。
// Initialise a class that implements RCTBridgeDelegate
// Be warned, RCTBridge won't store a strong reference to your delegate.
// You should there store this delegate as a property of your initialising class, or implement the protocol in the View Controller itself.
id<RCTBridgeDelegate> moduleInitialiser = [[classThatImplementsRCTBridgeDelegate alloc] init];
// Create a RCTBridge instance
// (you may store this in a static context if you wish to use with other RCTViews you might initialise.
RCTBridge *bridge = [[RCTBridge alloc] initWithDelegate:moduleInitialiser launchOptions:nil];
// Initialise an RCTRootView
RCTRootView *rootView = [[RCTRootView alloc]
initWithBridge:bridge
moduleName:kModuleName
initialProperties:nil];
// Note that your class that implements RCTBridgeDelegate SHOULD implement the following methods and it might look something like this.
// This will return the location of our Bundle
- (NSURL *)sourceURLForBridge:(RCTBridge *)bridge
{
return [NSURL URLWithString:@"http://localhost:8081/index.ios.bundle?platform=ios"];
}
// Importantly, this is the method we need to implement to answer this question
// We must return an array of initialised Modules
// Be warned, I am writing this off of the top of my head, so excuse any syntax errors there might be!
- (NSArray *)extraModulesForBridge:(RCTBridge *)bridge
{
return @[[OurNativeModule alloc] initWithCustomInitialiser:customDependency]];
}
编辑:我将此添加到React-native文档中。 https://facebook.github.io/react-native/docs/native-modules-ios.html#dependency-injection
上面的代码工作得很好。 这是代码的Swift 4版本。
@objc(RNModuleInitialiser)
final class RNModuleInitialiser: NSObject {
//Inject your dependencies here
init() {
}
}
extension RNModuleInitialiser: RCTBridgeDelegate {
func sourceURL(for bridge: RCTBridge!) -> URL! {
return URL(string: "http://localhost:8081/index.ios.bundle?platform=ios")!
}
func extraModules(for bridge: RCTBridge!) -> [RCTBridgeModule]! {
var extraModules = [RCTBridgeModule]()
//Initialise the modules here using the dependencies injected above
return extraModules
}
}
初始化桥时,传递moduleInitialiser:
//Make sure to hold the strong reference to the moduleInitaliser
self.moduleInitialiser = RNModuleInitialiser()
self.bridge = RCTBridge(delegate: self.moduleInitialiser, launchOptions: nil)
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