WebView中JS调用Native交互

 openNativeMethod: function() {
      try {
       vueProject.test();
      } catch (error) {
        Toast(error.message)
      }
    },
    openNativeMethodWithParam () {
        try {
          vueProject.testFunction('这是一个测试数据，希望你能正常接收 - 来自外太空')
        } catch (error) {
        Toast(error.message)
        }
    }, 
    openNativeMethodWithParams () {
      try {
        vueProject.testFunctionWith('参数1','参数二','不知道这样能不能过去 - 来自外太空的呼唤')
      } catch (error) {
        Toast(error.message)
      }
    }

#import <Foundation/Foundation.h>
#import <JavaScriptCore/JavaScriptCore.h>
@protocol JSObjectProtocol <JSExport>

- (void)test;

- (void)testFunction:(id)param;

- (void)testFunctionWith:(id)param1 :(id)param2 :(id)param3;

@end

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    self.webView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
    [self.view addSubview:self.webView];
    [self.webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"https://zhangrongwu.github.io/vueDemo/dist/"]]];
    [self registerObjectToJS];
}
- (void)registerObjectToJS {
    //    获取html的window对象
    JSContext *jsContext = [self.webView valueForKeyPath:@"documentView.webView.mainFrame.javaScriptContext"];
    // 原生界面实现方法的对象
    JSObjectManager *object = [[JSObjectManager alloc] init];
    //    把对象塞给JSContext的app对象，js端使用app开头调用 如 app.test() 、 app.testFunction()
    jsContext[@"vueProject"] = object;
}