1、首先，需要定义一个JS可识别的变量（如external）用于OC与JS交互
- (void)webView:(WebView *)sender didClearWindowObject:(WebScriptObject *)windowObject forFrame:(WebFrame *)frame{ ???[self.windowScriptObject setValue:self forKey:@"external"];}2、JS调用OC代码
第一步、在OC中声明对JS开放的函数，如下：
+ (BOOL)isSelectorExcludedFromWebScript:(SEL)selector { ???????if ( selector == @selector(Login:password:)) { ?????????return NO; ?????} ?????return YES; ?} ?第二步、建立名称索引
+ (NSString *) webScriptNameForSelector:(SEL)sel { ???????if (sel == @selector(Login:password:)) { ?????????return @"Login"; ?????} ?????return nil; ?} 这样，在JS中只要使用external.Login(account,password)就是调用OC中的[self Login:account password:password]。
3、OC调用JS的函数
- (id)callWebScriptMethod:(NSString *)name withArguments:(NSArray *)arguments;
- (void)callWebScriptMethod:(NSString *)name withArguments:(NSArray *)arguments{ ???????if (arguments.count == 0 ???????|| arguments == nil) ???{ ???????return; ???} ???????@try { ???????dispatch_async(dispatch_get_main_queue(), ^{ ???????????[self.windowScriptObject callWebScriptMethod:name withArguments:arguments]; ???????}); ???????????} ???@catch (NSException *exception) { ???????NSLog(@"ex=%@",exception); ???} ???}4、OC执行JS代码
方法一、调用WebScriptObject的方法
- (id)evaluateWebScript:(NSString *)script;
方法二、调用Webview的方法
- (NSString *)stringByEvaluatingJavaScriptFromString:(NSString *)script;
5、如何调试Webview
[[NSUserDefaults standardUserDefaults] setBool:TRUE forKey:@"WebKitDeveloperExtras"];
Mac Webview OC与JS交互实现
原文地址：https://www.cnblogs.com/yongbufangqi1988/p/8463378.html