多線程之dispatch_queue_t

gcd異步多線程操作使用流程，一般在子線程中處理數據，主線程更新界面

static dispatch_queue_t loadDealersQueue = NULL;
    if (!loadDealersQueue) {
        loadDealersQueue = dispatch_queue_create("com.geelycar.loadactivity.loaddealersqueue", NULL);
    }
    
    dispatch_async(loadDealersQueue, ^{
        @autoreleasepool {
            //Data processing
            dispatch_async(dispatch_get_main_queue(), ^{
            //Update Interface
            });
        }
    
    });

今天又張見識了，看下如下的子線程與主線程的調用

 static dispatch_queue_t searchQueue = NULL;
    if( !searchQueue )
        searchQueue = dispatch_queue_create("com.moneytree.searchqueue", NULL);//調度隊列
    
//異步運行
    dispatch_async(searchQueue, ^{
        @autoreleasepool {//ARC模式下自動釋放池的寫法
//數據處理放在隊列中
            NSArray *resultData = [[NSArray alloc] initWithArray:[[MTStockManage sharedInstance] stockListMatchingSearchText:searchText fromArray:self.stockList]];            
            self.stockList = resultData;
            [self setTableDataSource:nil];
            
            
            if (resultData.count > SHOW_STOCK_NUMBER) {
                NSRange range = NSMakeRange(0, SHOW_STOCK_NUMBER);
                [self setTableDataSource:[resultData subarrayWithRange:range]];
            }else {
                [self setTableDataSource:resultData];
            }
            
            dispatch_async(dispatch_get_main_queue(), ^{//返回主界面
                [self.dataResultTable reloadData]; //主線程中刷新UI
            });            
        }
    });