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Weex重写WXNavigatorHandle

Weex重写WXNavigatorHandle

作者: GL_fire | 来源:发表于2019-04-13 22:46 被阅读0次

    面试之家只是为了学习和交流使用Weex,题库等内容不可用于商业项目

    Weex开发中,可以使用单页面开发模式,和混合开发模式,单页面开发中,所有的页面可以用路由的方式来跳转,但是体验达不到原生页面切换的标准,个人觉得正确使用Weex
    的方式还是混合开发,如此一来,WeexSDK提供的导航模块就不能满足我们的需求了,所以就有了我们的自定义WXNavigatorHandle

    Native端

    1. 创建基类,

      创建WXNavigatorHandle继承NSObject,引入头文件#import <WXNavigationProtocol.h>,参照WeexSDK实现协议里的方法

    2. 修改协议方法实现

      - (void)pushViewControllerWithParam:(NSDictionary *)param completion:(WXNavigationResultBlock)block withContainer:(UIViewController *)container {
         if (0 == [param count] || !param[@"url"] || !container) {
             [self callback:block code:MSG_PARAM_ERR data:nil];
             return;
         }
         
         if ([param[@"type"] isEqualToString:@"weex"]) {
             [self pushWeexController:param completion:block withContainer:container];
         } else if ([param[@"type"] isEqualToString:@"native"]) {
             [self pushNavtiveController:param completion:block withContainer:container];
         } else if ([param[@"type"] isEqualToString:@"web"]) {
             [self pushWeexController:param completion:block withContainer:container];
         } else {
             [self pushWeexController:param completion:block withContainer:container];
         }
      }
      

      在传参中定义一个 Type属性来区分跳转WeexWebNative,默认跳转Weex

    3. 跳转Weex界面

    - (void)pushWeexController:(NSDictionary *)param completion:(WXNavigationResultBlock)block
                 withContainer:(UIViewController *)container {
        NSString *urlPath = param[@"url"];
        if ([param[@"type"] isEqualToString:@"web"]) {
            if ([AppConfig isServerJS]) {
                urlPath = [NSString stringWithFormat:@"%@/Web/webview.js?weburl=%@",DOCUMENT_URL,urlPath];
            } else {
                urlPath = [NSString stringWithFormat:@"%@/Web/webview.js?weburl=%@",BUNDLE_RESOURCE_URL,urlPath];
            }
        } else {
            if (!([urlPath hasPrefix:@"file://"] || [urlPath hasPrefix:@"http://"] || [urlPath hasPrefix:@"https://"])) {
                if ([AppConfig isServerJS]) {
                    urlPath = [NSString stringWithFormat:@"%@%@",DOCUMENT_URL,urlPath];
                } else {
                    urlPath = [NSString stringWithFormat:@"%@%@",BUNDLE_RESOURCE_URL,urlPath];
                }
            }
        }
       
        BOOL animated = YES;
        NSString *obj = [[param objectForKey:@"animated"] lowercaseString];
        if (obj && [obj isEqualToString:@"false"]) {
            animated = NO;
        }
        
        WXBaseViewController *vc = [[WXBaseViewController alloc]initWithSourceURL:[NSURL URLWithString:urlPath]];
        vc.hidesBottomBarWhenPushed = YES;
        [container.navigationController pushViewController:vc animated:animated];
        [self callback:block code:MSG_SUCCESS data:nil];
    }
    

    Weex的发展一是为了Write Once, Run Everywhere,二是为了能够起到热更新的作用,所以我们的bundlejs是要能动态替换的,所以这里用[AppConfig isServerJS]来区分是加载的本地的JS,还是加载服务器下发的JS

    注意 参数animatedString类型写其它类型崩溃

    1. 跳转原生界面

    因为Weex无法像原生跳转一样,去实例对象,并为对象赋值,所以这个地方需要特殊的处理一下
    运用我们iOSRuntime来动态匹配参数

    - (void)pushNavtiveController:(NSDictionary *)paramDic completion:(WXNavigationResultBlock)block
                    withContainer:(UIViewController *)container {
        if (!([paramDic isKindOfClass:[NSDictionary class]])) return;
        NSDictionary *param = paramDic[@"param"];
        Class targetClass = NSClassFromString(param[@"n"]);
        id target = [[targetClass alloc] init];
        if (target == nil) {
            [SVProgressHUD showErrorWithStatus:@"暂时不能打开"];
            return;
        } else {
            unsigned int outCount = 0;
            NSMutableArray *keyArray = [NSMutableArray array];
            objc_property_t *propertys = class_copyPropertyList([targetClass class], &outCount);
            for (unsigned int i = 0; i < outCount; i ++) {
                objc_property_t property = propertys[i];
                NSString * propertyName = [NSString stringWithCString:property_getName(property) encoding:NSUTF8StringEncoding];
                [keyArray addObject:propertyName];
            }
            free(propertys);
            
            NSDictionary *parameterDic = param[@"v"];
            if (parameterDic.allKeys.count > 0) {
                NSArray *array = parameterDic.allKeys;
                for (NSInteger i = 0; i < array.count; i++) {
                    NSString *key = array[i];
                    if ([keyArray containsObject:key]) {
                        [target setValue:parameterDic[key] forKey:key];
                    }
                }
            }
            [container.navigationController pushViewController:target animated:YES];
            [self callback:block code:MSG_SUCCESS data:nil];
        }
    }
    
    

    解释一下这段代码

    首先固定号参数格式, 参数对象中在包含一个对象,用于获取类名,和类的参数

    使用NSClassFromString拿到相关的Class,然后初始化

    id target = [[targetClass alloc] init];
        if (target == nil) {
            [SVProgressHUD showErrorWithStatus:@"暂时不能打开"];
            return;
        }
    

    使用Runtimeclass_copyPropertyList来获取所有的属性变量,然后遍历v对象,如果v对象中的key包含在对象的参数中,就可以使用KVC赋值,达到动态跳转的目的

    Weex端 使用

    先引入模块

    var navigator = weex.requireModule('navigator');
    

    然后进行跳转

    didSelectRow (obj) {
                    let path = '/Skills/QuestionDetail.js?questionID=' + obj.number + 'and' + obj.classId + 'and' + this.dataArray.length;
                    const url = weex.config.bundleUrl;
                    navigator.push({
                        url: path,
                        animation: 'true',
                        type: 'weex'
                    }, function (callBack) {
    
                    })
                }
    

    总结

    • 实现加载内置bundlejs和下发的bundlejs的能力
    • 使用runtime达到Weex跳转任意原生页面的能力1

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