js获取app信息

// Android端
webView.addJavascriptInterface(new Object() {
    @JavascriptInterface
    public String getAppInfo() {
        return "App Version: 1.0.0";
    }
}, "AndroidBridge");

// iOS端
WKWebViewConfiguration *configuration = [[WKWebViewConfiguration alloc] init];
WKUserContentController *userContentController = [[WKUserContentController alloc] init];
[configuration setUserContentController:userContentController];
WKScriptMessageHandler *messageHandler = [[WKScriptMessageHandlerImpl alloc] init];
[userContentController addScriptMessageHandler:messageHandler name:@"iOSBridge"];

function getAppInfo() {
    if (window.AndroidBridge) { // Android
        return window.AndroidBridge.getAppInfo();
    } else if (window.webkit && window.webkit.messageHandlers.iOSBridge) { // iOS
        return new Promise((resolve, reject) => {
            window.webkit.messageHandlers.iOSBridge.postMessage('getAppInfo');
            window.iOSBridgeCallback = (info) => resolve(info);
        });
    } else {
        return "Bridge not available";
    }
}

// 使用
getAppInfo().then(info => console.log(info));