iOS关于H5和原生页面交互

た入场券 2022-01-19 22:59 319阅读 0赞

H5页面调用原生页面，首选JavaScriptCore，JSContext搭配JSExport：

- (void)setupJsContent
    {
        //获取当前JS环境
        JSContext *_content = [self.webView valueForKeyPath:@"documentView.webView.mainFrame.javaScriptContext"];
        // 打印异常
        _content.exceptionHandler =
        ^(JSContext *context, JSValue *exceptionValue)
        {
            context.exception = exceptionValue;
            NSLog(@"exceptionValue is %@", exceptionValue);
        };
        YongLian *yonglian = [[YongLian alloc] init];
        _content[@"YongLian"] = yonglian;
        yonglian.jsContext = _content;
    }
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其中`YongLian`这个类的`.h`文件：

#import <UIKit/UIKit.h>
    #import <Foundation/Foundation.h>
    #import <JavaScriptCore/JavaScriptCore.h>
    NS_ASSUME_NONNULL_BEGIN
    @protocol JavaScriptCoreOCDelegate <JSExport>
    
    -(void)user_login:(NSString *)user_login;
    -(void)chat_list:(NSString *)chat_list;
    -(void)chat_user:(NSString *)chat_user;
    -(void)onImage:(NSNumber*)index clicked:(NSString*)urls;
    @end
    typedef void(^YongLianImageClickBlock)(NSNumber*,NSArray*);
    @interface YongLian : NSObject<JavaScriptCoreOCDelegate>
    @property (nonatomic, weak) JSContext *jsContext;
    //@property (nonatomic, strong) UIWebView *webView;
    @property (nonatomic, copy) YongLianImageClickBlock imageClickBlock;
    @end
    
    NS_ASSUME_NONNULL_END
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`.m`文件：

- (void)user_login:(NSString *)user_login{
        NSLog(@"user login");
        dispatch_async(dispatch_get_main_queue(), ^{
            UserInfoSingleton *userInfo = [UserInfoSingleton defaultUserInfo];
            LoginViewController_1 *loginVC = [LoginViewController_1 new];
            UINavigationController *nav4 = [[WKNavigationController alloc]initWithRootViewController:loginVC];
            if (!userInfo.login) {
                [[WKVCTools getCurrentVC].navigationController presentViewController:nav4 animated:true completion:nil];
            }
        });
        
    }
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> 尤其需要注意的是，当我们在JS中是两个参数的时候，例如这里的`-(void)onImage:(NSNumber*)index clicked:(NSString*)urls`方法，在JS中是这样的：

YongLian.onImageClicked(index,urls);
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这个时候OC中的方法名字，就需要是`onImage:Clicked`也就是冒号去掉之后和JS方法名完全一致才行。