找到的一些SQLite3的int和二進制數據的插入、讀取操作。

//插入
            sqlite3_bind_int(insert_statement, 3, [e intValue]);  
            
            //提供png格式和jpg格式支持
            int returnValue = -1;  
            NSData *imageData = nil;  
            UIImage *por = [UIImage imageNamed:@"kill.png"];  
            imageDate = UIImageJPEGRepresentation(<#UIImage *image#>, <#CGFloat compressionQuality#>)
        
            imageData = UIImagePNGRepresentation(por);//png格式  
            if (nil == por) {  
                returnValue = sqlite3_bind_blob(insert_statement, 4, nil, -1, NULL);  
            }else {  
                returnValue = sqlite3_bind_blob(insert_statement, 4,[imageData bytes],[imageData length], NULL);  
            }  
            
            
            //更新
            sqlite3_bind_int(update_statement, 3, [e intValue]);  
            
            //提供png格式和jpg格式支持  
            int returnValue = -1;  
            NSData *imageData = nil;  
            UIImage *por = [UIImage imageNamed:@"killer.png"];  
            if (nil == por) {  
                returnValue = sqlite3_bind_blob(update_statement, 4, nil, -1, NULL);    
            }else {  
                imageData = UIImageJPEGRepresentation(por,1.0f);//jpg格式  
                returnValue = sqlite3_bind_blob(update_statement, 4,[imageData bytes],[imageData length], NULL);  
            }  
        }  
        
      //讀取
        exp = sqlite3_column_int(statement,3);  
        if (NULL != sqlite3_column_blob(statement,4)) {  
            imgData = [[NSData alloc] initWithBytes:sqlite3_column_blob(statement,4) length:sqlite3_column_bytes(statement, 1)];  
        } 

 

 

 

NSData* ImageData = UIImagePNGRepresentation( channel.image_);

NSInteger Imagelen = [ImageData length];

sqlite3_bind_blob(statement, 3, [ImageData bytes], Imagelen, SQLITE_TRANSIENT);
    sqlite3_bind_int(statement, 4, Imagelen);    

 

   Byte* imageData = (Byte*)sqlite3_column_blob(statement, 3);
        int imageLen    = sqlite3_column_int(statement, 4);        

  if(imageData){
            UIImage* image = [UIImage imageWithData:[NSData dataWithBytes:imageData length:imageLen]];
            channel.image_ = image;
        }