JS和OC相互传值

//webView加载html文件
NSURL *url = [[NSBundle mainBundle]URLForResource:@"oc和js" withExtension:@"html"];
self.webView.delegate = self;
[self.webView loadRequest:[NSURLRequest requestWithURL:url]];

-(BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType{

NSLog(@"====%@ ====%@===%@",[request URL],request,[[request URL] scheme]);
NSURL *url = [request URL];

NSString *urlStr = [url absoluteString];
if([urlStr containsString:@"file"]){
    
    NSLog(@"包含");
}else{
    
    NSLog(@"不包含");
}

//JS给OC传值方法1:裁剪参数
if([[url scheme] isEqualToString:@"firstclick12"]){

    NSArray *params = [url.query componentsSeparatedByString:@"&"];
    NSMutableArray *temArray = [NSMutableArray arrayWithCapacity:0];
    for (NSString *parmStr in params) {
        
        NSArray *contentArray = [parmStr componentsSeparatedByString:@"="];
        if(contentArray.count>1){
            
            //编码
            NSString *decodeValue = @"";
            if([[[UIDevice currentDevice]systemVersion]floatValue]<9.0){
                
                decodeValue = [contentArray[1] stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
            }else{
                
                decodeValue = [contentArray[1] stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]];
            }
            [temArray addObject:decodeValue ];
            
            
        }
    }
    
    NSLog(@"tempDic:%@",temArray);
    
    return NO;
    
}
return YES;

}

• (void)webViewDidFinishLoad:(UIWebView *)webView {
  NSLog(@"执行啦");
  self.jsContext = [webView valueForKeyPath:@"documentView.webView.mainFrame.javaScriptContext"];

  //用于捕获错误信息
  self.jsContext.exceptionHandler = ^(JSContext *context, JSValue *exceptionValue) {
  context.exception = exceptionValue;
  NSLog(@"异常信息：%@", exceptionValue);
  };

NSLog(@"=====%@",webView.request.URL.absoluteString);
//OC给JS传值
[self call];
[self changeColor];

//JS给OC传值 -->此方法前端人员不一定实现
self.jsContext[@"loadURL"] = ^(){
    
    NSArray *array = [JSContext currentArguments];
    for (NSString *string  in array) {
        
        NSLog(@"string12======%@",string);
        
    }

};
    



self.jsContext[@"Show"] = ^(){
    
    NSArray *array = [JSContext currentArguments];
    for (NSString *string  in array) {
        
        NSLog(@"string======%@",string);
    }
};
self.jsContext[@"share"] = ^(){
    
    NSArray *args = [JSContext currentArguments];
    for (JSValue *jsVlu in args) {
        
        NSLog(@"jsVlu.toString====%@",jsVlu.toString);
    }
    dispatch_async(dispatch_get_main_queue(), ^{
        
        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"方式二" message:@"这是OC原生的弹出窗" delegate:self cancelButtonTitle:@"收到" otherButtonTitles:nil];
        [alertView show];
        
        
    });
    
    
    
};
//获取标签的内容
NSString *htmlNum = @"document.getElementById('isInApp').value";
NSString *numHtmlInfo = [webView stringByEvaluatingJavaScriptFromString:htmlNum];

NSLog(@"numHtmlInfo====%@",numHtmlInfo);
NSString *str = @"document.getElementById('isInApp').value='flase';";
[self.webView stringByEvaluatingJavaScriptFromString:str];

NSString *allHtml = @"document.documentElement.innerHTML";
NSString *allHtmlInfo = [webView stringByEvaluatingJavaScriptFromString:allHtml];

// NSLog(@"=====%@",allHtmlInfo);

NSString *numHtmlInfo1 = [webView stringByEvaluatingJavaScriptFromString:htmlNum];

// NSLog(@"numHtmlInfo====%@",numHtmlInfo1);

}

• (void)call{
  // 之后在回调js的方法Callback把内容传出去
  JSValue *Callback = self.jsContext[@"Callback"];
  //传值给web端
  [Callback callWithArguments:@[@"江弘",@"15757166458"]];
  }

• (void)changeColor{
  // 之后在回调js的方法Callback把内容传出去
  JSValue *Callback = self.jsContext[@"changeColor"];
  //传值给web端
  [Callback callWithArguments:@[@"red"]];
  }