FMDB多線程

<span style="color:#cc0000;">之前在做電商的應用，裏面正好用到了數據庫，當時就看了一下FMDB的多線程，現在把項目中自己寫的一個多線程的Demo分享出來。</span>
<span style="color:#6600cc;">.h文件</span>
#import <Foundation/Foundation.h>
#import "FMDB.h"

@interface OKWDBQueueManager :NSObject

+(instancetype)defaultManager;

<span style="color:#009900;">/**
 上游供應商列表</span>

<span style="color:#009900;"> 這裏實體Model自己定義，基本上這個包含了增刪查改，可自由替換
 */</span>
-(void)db_updateUpSupplierList:(OKWUpSupplierListModel *)upModel completedBlock:(void (^)(BOOL isSuccess))completedBlock;
-(OKWUpSupplierListModel *)upSupplierModelWithWeiNo:(NSString *)weiNo;
-(void)db_deleteAllDataUpSupplierModelWith:(NSString *)weiNo;




<span style="color:#6600cc;">.m文件</span>
#import "OKWDBQueueManager.h"

static NSString *const OKW_QUEUE_TABLE_UPSUPPLIER =@"OKW_QUEUE_TABLE_UPSUPPLIER";
static NSString *const OKW_QUEUE_TABLE_DOWNUSERS =@"OKW_QUEUE_TABLE_DOWNUSERS";

@interface OKWDBQueueManager()
@property(nonatomic,strong)FMDatabaseQueue * db;
@end

@implementation OKWDBQueueManager

#define DBQueuePath @"okw_queuedatasource.db"

static OKWDBQueueManager *sharedInstance =nil;
+(id)defaultManager
{
    staticdispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        sharedInstance = [[OKWDBQueueManageralloc] init];
        sharedInstance.db = [FMDatabaseQueuedatabaseQueueWithPath:[sharedInstancegetDatabasePath]];
        NSString * upSupplier_queue_table = [NSStringstringWithFormat:@"CREATE TABLE if not exists %@ (upID INTEGER PRIMARY KEY AUTOINCREMENT,WeiID,newMsgTitle,NewMsgCount)",OKW_QUEUE_TABLE_UPSUPPLIER];
        NSString * downUsers_queue_table = [NSStringstringWithFormat:@"CREATE TABLE if not exists %@ (downID INTEGER PRIMARY KEY AUTOINCREMENT,WeiID,newMsgTitle,NewMsgCount)",OKW_QUEUE_TABLE_DOWNUSERS];
        [sharedInstance.dbinDatabase:^(FMDatabase *db) {
            if (![dbopen]) {
                return;
            }
            [db executeUpdate:upSupplier_queue_table];
            [db executeUpdate:downUsers_queue_table];
<span style="color:#009900;">//            NSLog(@"%@表創建 %@",OKW_QUEUE_TABLE_UPSUPPLIER,([db executeUpdate:upSupplier_queue_table] ? @"成功" : @"失敗"));
//            NSLog(@"%@表創建 %@",OKW_QUEUE_TABLE_DOWNUSERS,([db executeUpdate:downUsers_queue_table] ? @"成功" : @"失敗"));</span>
        }];
    });
    returnsharedInstance;
}
-(NSString *)getDatabasePath
{
    NSString *documentPath =NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES)[0];
<span style="color:#009900;">//    NSLog(@"DBQueuePath = %@",documentPath);</span>
    return [documentPathstringByAppendingPathComponent:[NSStringstringWithFormat:@"%@",DBQueuePath]];
}

<span style="color:#009900;">/**
 上游供應商列表
 */</span>
-(void)db_updateUpSupplierList:(OKWUpSupplierListModel *)upModel completedBlock:(void (^)(BOOL isSuccess))completedBlock{
    [sharedInstance.dbinDatabase:^(FMDatabase *db) {
        if (![dbopen]) {
            return ;
        }
        NSString * resultSetString = [NSStringstringWithFormat:@"select * from OKW_QUEUE_TABLE_UPSUPPLIER where WeiID = '%@'",upModel.WeiID];
        FMResultSet * resultSet = [dbexecuteQuery:resultSetString];
        while ([resultSetnext]) {
            BOOL res = [dbexecuteUpdate:@"UPDATE OKW_QUEUE_TABLE_UPSUPPLIER SET newMsgTitle=?,NewMsgCount=? WHERE WeiID=?",upModel.NewMsgTitle,[NSNumbernumberWithInt:([resultSet intForColumn:@"NewMsgCount"]+1)],upModel.WeiID];
            if (!res) {
                NSLog(@"error when update db table");
            }else{
                NSLog(@"success to update db table %@",upModel.WeiID);
            }
            [db close];
            if(completedBlock)completedBlock(res);
            return ;
        }
        
        BOOL res = [dbexecuteUpdate:@"insert into OKW_QUEUE_TABLE_UPSUPPLIER (WeiID,newMsgTitle,NewMsgCount) VALUES (?,?,?)",upModel.WeiID,upModel.NewMsgTitle,[NSNumbernumberWithInteger:(upModel.NewMsgCount==0?1:upModel.NewMsgCount)]];
        [db close];
        if(completedBlock)completedBlock(res);
    }];
}
-(OKWUpSupplierListModel *)upSupplierModelWithWeiNo:(NSString *)weiNo{
    __blockOKWUpSupplierListModel * upSupplierModel = [[OKWUpSupplierListModelalloc] init];
    [sharedInstance.dbinDatabase:^(FMDatabase *db) {
        [db open];
        NSString * resultSetString = [NSStringstringWithFormat:@"select * from OKW_QUEUE_TABLE_UPSUPPLIER where WeiID = '%@'",weiNo];
        FMResultSet * resultSet = [dbexecuteQuery:resultSetString];
        
        while ([resultSetnext]) {
            upSupplierModel.WeiID = [resultSetstringForColumn:@"WeiID"];
            upSupplierModel.NewMsgTitle = [resultSetstringForColumn:@"newMsgTitle"];
            upSupplierModel.NewMsgCount = [resultSetintForColumn:@"NewMsgCount"];
        }
        [db close];
    }];
    return upSupplierModel;
}
-(void)db_deleteAllDataUpSupplierModelWith:(NSString *)weiNo{
    [sharedInstance.dbinDatabase:^(FMDatabase *db) {
        [db open];
        [db executeUpdate:@"DELETE from OKW_QUEUE_TABLE_UPSUPPLIER where WeiID=?",weiNo];
        [db close];
    }];
}