代碼demo已在Github開源,MXJSMessageHandler
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MXJSMessageHandler

MXJSMessageHandler solves that WKWebView has always retained(id<WKScriptMessageHandler> scriptMessageHandler, scriptMessageHandler may be a controller.

解決了WKWebView的scriptMessageHandler有時候會是controller本身的問題，導(dǎo)致循環(huán)引用，內(nèi)存泄漏的問題

Screenshot

image.png

How to use

原生注入js方法callNativeMethod（內(nèi)部再調(diào)用原生的方法test）

NSString *jsMethodName = @"callNativeMethod", *nativeMethodName = @"test";
// 1. 注入`js`方法`callNativeMethod（內(nèi)部再調(diào)用原生的方法`test`）`
NSString *jsScript = [NSString stringWithFormat:@"\
function %@(data) {\
       window.webkit.messageHandlers.%@.postMessage(data)\
       }", jsMethodName, nativeMethodName];
[_webView mx_addUserScript:[[WKUserScript alloc] initWithSource:jsScript injectionTime:WKUserScriptInjectionTimeAtDocumentStart forMainFrameOnly:YES]];

原生調(diào)用js方法callNativeMethod，延時1S是保證讓js方法調(diào)用成功（不為undefine）

// 2. 原生調(diào)用js方法`callNativeMethod`，延時1S是保證讓`js方法調(diào)用成功（不為undefine）`
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
    [_webView evaluateJavaScript:[NSString stringWithFormat:@"%@(\"%@\")", jsMethodName, @"data: js to oc"] completionHandler:^(id data, NSError *error) {}];
});

監(jiān)聽js調(diào)用原生方法test的block

// 3. 監(jiān)聽`js`調(diào)用原生方法`test`的`block`
    __weak __typeof(self) weakself = self;
    [_webView mx_addScriptMessageHandler:[MXJSMessageHandler handlerWithBlock:^(WKUserContentController *userContentController, WKScriptMessage *message) {
        if ([message.body isKindOfClass:[NSString class]]) {
            NSString *data = message.body;
            [weakself showData:data];
        }
    }] name:nativeMethodName];