WKWebViewJavascriptBridge

1.git地址 https://github.com/marcuswestin/WebViewJavascriptBridge

2.引入头文件 

#import <WKWebViewJavascriptBridge.h>

3.写属性

@property (nonatomic,strong) WKWebViewJavascriptBridge* mJsBridge;
@property (nonatomic,strong) WVJBResponseCallback payResponseCallback;

4.创建桥接对象，与 _mWebView 关联

-(WKWebViewJavascriptBridge *)mJsBridge
{
    if (!_mJsBridge) {
        _mJsBridge = [WKWebViewJavascriptBridge bridgeForWebView:_mWebView];
        [_mJsBridge setWebViewDelegate:self];
    }
    return _mJsBridge;
}

5.注册原生事件 requestPay 供 JavaScript 调用, data 是 JavaScript 传给原生的数据。responseCallback 是原生给 JavaScript 回传数据

-(void)registJsBridge

{

    @WeakSelf(self);

    [self.mJsBridge registerHandler:@"requestPay" handler:^(id data, WVJBResponseCallback responseCallback) {

        @StrongSelf(self);

        if (data&& [data  isKindOfClass:[NSDictionary class]]) {

            //payResponseCallback先记录回调对象，便于下面异步处理后回传给JS数据

            self.payResponseCallback = responseCallback;

            //原生拿到data做处理

            

        }

    }];

}

6.原生调 JavaScript 的事件 JS Echo

    [self.mJsBridge callHandler:@"JS Echo" data:nil responseCallback:^(id responseData) {
        NSLog(@"ObjC received response: %@", responseData);
    }];