今天,我尝试使用自定义的Swift类在Javascript代码中实现Singleton模式。我已经创建了本机模块,但今天却遇到此错误:“ 致命错误:对类使用未实现的初始化程序'init()'”
我想这是因为Singleton模式,但我无法理解我的错误...
这是我的代码:
AnalyticsTracker.swift
import Foundation
import Tracker
@objc(AnalyticsTracker)
class AnalyticsTracker: NSObject {
static let shared = AnalyticsTracker(tracker: ATInternet.sharedInstance.defaultTracker)
// MARK: -
let tracker: Tracker
// Initialization
private init(tracker: Tracker) {
self.tracker = tracker
}
@objc
func viewScreen(screen: String) {
self.tracker.screens.add(screen).sendView()
}
@objc
func sendTouch(clickName: String, chapter1: String, chapter2: String, chapter3: String, level2: Int) {
let gesture = self.tracker.gestures.add(clickName, chapter1: chapter1, chapter2: chapter2, chapter3:chapter3)
gesture.level2 = level2
gesture.sendTouch()
}
}
还有将类导出到我的本地应用程序的模块:
AnalyticsTracker.m
#import <Foundation/Foundation.h>
#import <React/RCTBridgeModule.h>
@interface RCT_EXTERN_MODULE(AnalyticsTracker, NSObject)
RCT_EXTERN_METHOD(
sendTouch:
(NSString*)clickName
(NSString*)chapter1
(NSString*)chapter2
(NSString*)chapter3
(int)level2
)
@end
当我删除导出模块时,错误消失了。我真的不明白错误的含义...
如果有人有想法,将不胜感激:)
答案 0 :(得分:2)
问题出在React Native的桥接机制中。 AFAIK它不支持自定义初始化。作为解决方法,您可以创建一个在其导出方法中使用AnalyticsTracker.shared的帮助程序类:
// RNAnalyticsTracker.swift
import Foundation
@objc(RNAnalyticsTracker)
class RNAnalyticsTracker: NSObject {
@objc
func viewScreen(screen: String) {
AnalyticsTracker.shared.viewScreen(screen: screen)
}
@objc
func sendTouch(clickName: String, chapter1: String, chapter2: String, chapter3: String, level2: Int) {
AnalyticsTracker.shared.sendTouch(clickName: clickName, chapter1: chapter1, chapter2: chapter2, chapter3: chapter3, level2: level2)
}
}
来源参考:https://gist.github.com/harveyconnor/7b0e778effaae302f512485c18881569
答案 1 :(得分:0)
您将继承NSObject,因此必须提供公共的初始化构造函数,该构造函数将初始化您的tracker
属性。