1、新建vconsole.js，将https://cdn.bootcss.com/vConsole/3.2.2/vconsole.min.js或者http://wechatfe.github.io/lib/vconsole/3.4.0/vconsole.min.js 这个链接打开，将内容全部复制到vconsole.js里面

在vconsole.js里面最下面再加上这句话

let vConsole = new VConsole();
console.log("Hello World");

2、第一种注入方法，只注入当前webview

    WKWebViewConfiguration *config = [[WKWebViewConfiguration alloc] init];
    WKUserContentController * wkUController = [[WKUserContentController alloc] init];
    config.userContentController = wkUController;
    NSString *path = [[NSBundle mainBundle]pathForResource:@"vconsole.js" ofType:nil];
    NSString *filename = [[NSString alloc]initWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil];
    WKUserScript *script = [[WKUserScript alloc] initWithSource:filename injectionTime:WKUserScriptInjectionTimeAtDocumentEnd forMainFrameOnly:YES];
    [wkUController addUserScript:script];
    WKWebView *webView = [[WKWebView alloc]initWithFrame:[UIScreen mainScreen].bounds configuration:config];
    [self.view addSubview:webView];
    //1.网络
     NSMutableURLRequest * request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"https://www.qq.com/"]];
    [webView loadRequest:request];

第二种注入方法，全局注入

@interface WKWebViewConfiguration (VConsole)

@end

@implementation WKWebViewConfiguration (VConsole)

+ (void)load {
    Method origIMP = class_getInstanceMethod(self, @selector(setUserContentController:));
    Method hookIMP = class_getInstanceMethod(self, @selector(setHookUserContentController:));
    method_exchangeImplementations(origIMP, hookIMP);
}
- (void)setHookUserContentController:(WKUserContentController *)userContentController {
    NSString *path = [[NSBundle mainBundle]pathForResource:@"vconsole.js" ofType:nil];
    NSString *filename = [[NSString alloc]initWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil];
    WKUserScript *script = [[WKUserScript alloc] initWithSource:filename injectionTime:WKUserScriptInjectionTimeAtDocumentEnd forMainFrameOnly:YES];
    [userContentController addUserScript:script];
    [self setHookUserContentController:userContentController];
}
@end