iOS快速开发框架Bee-Framework应用和解析（三) --- Message, Model, Signal

-(void) getNewsList {

    BeeMesage * api = [API_NEWS_LIST api];

    //加入Http参数

    api.INPUT( @"uid", [NSString stringWithFormat:@"%d", _uid]);<p style="margin-top: 0px; margin-bottom: 0px; font-size: 11px; font-family: Menlo;">
</p>    api.whenUpdate = ^
    {        
        if ( api.sending )
        {
            //处理发送
        }
        else if(api.succeed)
        {

            //发送成功，获得BeeMessage解析好的数据
            [self.news addObjectsFromArray:api.resp.news];
        }
        else if ( api.failed )
        {

             //处理失败
        }
        else if ( api.cancelled )
        {

             //处理取消
        }
    };
    
    [api send];

}

- (void)routine
{
    if ( self.sending )
    {
        NSString * requestURI = [[[ServerConfig sharedInstance] url] stringByAppendingString:api_news_list];
        
        self.HTTP_GET( requestURI );
    }
    else if ( self.succeed )
    {
        NSError* error;

        //通过XML解析回文
        CXMLDocument * document = [[CXMLDocument alloc] initWithXMLString:self.responseString options:NSUTF8StringEncoding error:&error];
        
        NSArray* newslist = [document nodesForXPath:@"oschina/newslist/news" error:&error];
               
        for ( CXMLElement* newsXML in newslist )
        {
            if(newsXML == nil) continue;
            
            NEWS* news = [NEWS createByXML:newsXML];
            [self.resp.news addObject:news];
        }
        
        if ( nil == self.resp || NO == [self.resp validate] )
        {
            self.failed = YES;
            return;
        }
    }
    else if ( self.failed )
    {
    }
    else if ( self.cancelled )
    {
    }
}
@end

- (void)firstPage
{
    _pages = 0;
    
    [API_POST_LIST cancel];
    
    API_POST_LIST *api = [API_POST_LIST api];
    

    //每页20个
    api.INPUT( @"pageIndex", @"0" );
    api.INPUT( @"pageSize", @"20" );
    
    api.whenUpdate = ^
    {
        @normalize( api );
        
        if ( api.sending )
        {
            [self sendUISignal:self.RELOADING];
        }
        else if ( api.succeed )
        {
            //第一页拉取成功
            [self.posts removeAllObjects];
                
            [self.posts addObjectsFromArray:api.resp.posts];
                
            self.loaded = YES;
            self.pages  = 1;
                
            [self sendUISignal:self.RELOADED];
        }
        else if ( api.failed )
        {
            [self sendUISignal:self.RELOADED];
        }
    };
    
    [api send];
}

- (void)nextPage
{
    [API_POST_LIST cancel];
    
    API_POST_LIST *api = [API_POST_LIST api];
    
    int curBegin = self.pages * 20;
    int curEnd   = curBegin + 20;
    api.INPUT( @"pageIndex", [NSString stringWithFormat:@"%d", curBegin]);
    api.INPUT( @"pageSize", [NSString stringWithFormat:@"%d", curEnd] );
    
    api.whenUpdate = ^
    {
        @normalize( api );
        
        if ( api.sending )
        {
            [self sendUISignal:self.RELOADING];
        }
        else if ( api.succeed )
        {

            //处理下一页
            if( _pages == 0)
            {
                [self.posts removeAllObjects];
            }
            
            [self.posts addObjectsFromArray:api.resp.posts];
         
            self.loaded = YES;
            self.pages  = self.pages + 1;
            [self sendUISignal:self.RELOADED];        
        }
        else if ( api.failed )
        {
            [self sendUISignal:self.FAILED];
        }
        else if ( api.cancelled )
        {
            [self sendUISignal:self.CANCELLED];
        }
    };
    
    [api send];
}

•          对象化的事件，可指定source, target
•          可携带附件对象
•          事件对象有通过带名字空间的三段取名方式。比如："signal.NewsModel.RELOADED", 表示来源于NewsModel类型的RELOADED事件。
•          事件对象和接收端解耦合，接收端采用“固定前缀 + 事件名”的方法生成selector, 比如-(void) handleUISignal_NewsModel_RELOADED: (BeeUISignal*) signal;
•          普通UI对象可以自己实现signalTarget方法，自己决定UISignal的转发路径，比如UIView的转发路径是对应的[view viewController];