如何在iPhone中的sqlite数据库中存储图像？

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
    NSString *documentsDirectory = [paths objectAtIndex:0]; 
    NSString *path = [documentsDirectory stringByAppendingPathComponent:@"image.sqlite"]; 


    if (sqlite3_open_v2([path UTF8String], &database, SQLITE_OPEN_READWRITE, NULL) == SQLITE_OK) 
    { 


     if(selectStmt == nil) 
     { 
      const char *sql = "insert into imagetb(imagename,image) Values(?,?)"; 
      if(sqlite3_prepare_v2(database, sql, -1, &selectStmt, NULL) != SQLITE_OK) 
       //    NSAssert1(0, @"Error while creating add statement. '%s'", sqlite3_errmsg(database)); 
       NSLog(@"%s",sqlite3_errmsg(database)); 
     } 



     sqlite3_bind_text(selectStmt, 1, [@"test.png" UTF8String], -1, SQLITE_TRANSIENT); 

     sqlite3_bind_blob(selectStmt, 2, [data1 bytes], [data1 length], SQLITE_TRANSIENT); 

     if(SQLITE_DONE != sqlite3_step(selectStmt)) 
      NSLog(@"get: %s",sqlite3_errmsg(database)); 
     else 
      NSLog(@"scan data added"); 


    } 

    //showimage 
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; 


    if (sqlite3_open([path UTF8String], &database) == SQLITE_OK) 
    { 
     const char *sql = "select * from imagetb";// LIMIT 0,100 ";// where status = 1 "; 
     sqlite3_stmt *selectstatment; 

     if (sqlite3_prepare_v2(database, sql, -1, &selectstatment, NULL) == SQLITE_OK) 
     { 
      while (sqlite3_step(selectstatment) == SQLITE_ROW) 
      { 

       NSString *getorgstrid = [NSString stringWithUTF8String:(char *)sqlite3_column_text(selectstatment, 0)]; 
       NSLog(@"id->%@",getorgstrid); 

       [getid addObject:getorgstrid]; 

       NSString *getorgstrname = [NSString stringWithUTF8String:(char *)sqlite3_column_text(selectstatment, 1)]; 
       NSLog(@"name->%@",getorgstrname); 
       [getname addObject:getorgstrname]; 


       NSData *getorgstrimage = [[NSData alloc] initWithBytes:sqlite3_column_blob(selectstatment,2)length:sqlite3_column_bytes(selectstatment, 2)]; 

       [getimage addObject:getorgstrimage]; 

      } 
     } 
     sqlite3_finalize(selectstatment); 

    } 
    //[tblorgland reloadData]; 

    UIImage *image1 = [UIImage imageWithData:[getimage lastObject]]; 

    NSLog(@"image%@",image1); 

    [getImageview setImage:image1]; 
    [pool release]; 


============================================================================== 

- (NSString *) getDBPath 
{ 
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory , NSUserDomainMask, YES); 
    NSString *documentsDir = [paths objectAtIndex:0]; 

    return [documentsDir stringByAppendingPathComponent:@"image.sqlite"]; 
} 

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 

    getid=[[NSMutableArray alloc]init]; 
    getname=[[NSMutableArray alloc]init]; 
    getimage=[[NSMutableArray alloc]init]; 

    [self downloadimage]; 
    [self makeDBCopyAsNeeded]; 
} 
-(void)downloadimage 
{ 
    NSLog(@"Downloading..."); 

    UIImage *image = [[UIImage alloc] initWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://0.tqn.com/d/graphicssoft/1/7/g/A/5/psptubezdotcom_003.png"]]]; 

    NSLog(@"%f,%f",image.size.width,image.size.height); 


    NSString *docDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0]; 


    NSLog(@"%@",docDir); 

    NSLog(@"saving png"); 
    pngFilePath = [NSString stringWithFormat:@"%@/test.png",docDir]; 
    data1 = [NSData dataWithData:UIImagePNGRepresentation(image)]; 

    img=[[UIImage alloc]initWithData:data1]; 



    [data1 writeToFile:pngFilePath atomically:YES]; 


    NSLog(@"saving jpeg"); 
    NSString *jpegFilePath = [NSString stringWithFormat:@"%@/test.jpeg",docDir]; 

    NSLog(@"jpegFilePath:%@",jpegFilePath); 
    data2 = [NSData dataWithData:UIImageJPEGRepresentation(image, 1.0f)]; 

    [data2 writeToFile:jpegFilePath atomically:YES]; 

    NSLog(@"saving image done"); 

    [image release]; 


} 
- (void) makeDBCopyAsNeeded 
{ 
    BOOL success; 
    NSFileManager *fileManager = [NSFileManager defaultManager]; 
    NSError *error; 
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
    NSString *documentsDirectory = [paths objectAtIndex:0]; 
    NSString *writableDBPath = [documentsDirectory stringByAppendingPathComponent:@"image.sqlite"]; 
    success = [fileManager fileExistsAtPath:writableDBPath]; 

    NSString *dbPath = [self getDBPath]; 
    NSLog(@"%@",dbPath); 

    if (success) 
    { 
     NSLog(@"Database Success Created"); 
     return; 
    } 
    NSString *defaultDBPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"image.sqlite"]; 
    success = [fileManager copyItemAtPath:defaultDBPath toPath:writableDBPath error:&error]; 
    if (!success) 
    { 
     NSLog(@"Database:->%s",sqlite3_errmsg(database)); 
    } 
}

来源

2013-03-07 Hrushikesh Betai

您可以将图像的路径存储到数据库中，而存储整个图像 – 2013-03-07 05:07:13

只要有看SO问题：HTTP ：//stackoverflow.com/questions/5039343/save-image-data-to-sqlite-database-in-iphone。希望这会帮助你。 – 2013-03-07 05:10:43

将图像写入文件系统要好得多。您可以在数据库中引用文件名。 – rmaddy 2013-03-07 05:14:15

建议不要将图像数据存储在sqlite中。但是，如果你想存储的图像数据，然后使用这个链接

Save image data to sqlite database in iphone

希望这将帮助你..

来源

2013-03-07 05:29:20

只要写在下面的代码 - （空）imagePickerController：（*的UIImagePickerController）选择器 didFinishPickingImage：（的UIImage *）图像 editingInfo：（NSDictionary的*）editingInfo：如果您是从画廊或照相机获取的图像否则跳过下，如果（为imageData =零！），只需使用下面的代码保存在sqlite的

NSData * imageData = UIImageJPEGRepresentation(image, 0.8); 
    NSLog(@"Image data length== %d",imageData.length); 

if (imageData != nil) 
    { 
     UIImage *resizedImg = [self scaleImage:[UIImage imageWithData:imageData] toSize:CGSizeMake(150.0f,150.0f)]; 

     NSData * imageData = UIImageJPEGRepresentation(resizedImg, 0.2); 
     NSLog(@"*** Image data length after compression== %d",imageData.length); 

     NSString *nameofimg=[NSString stringWithFormat:@"%@",resizedImg]; 

     NSString *substring=[nameofimg substringFromIndex:12]; 
     NSString *new=[substring substringToIndex:7];// Get image name 

     NSArray *path=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 

     NSString *documentdirectory=[path objectAtIndex:0]; 

     NSString *newFilePath = [NSString stringWithFormat:[documentdirectory stringByAppendingPathComponent: @"/%@.png"],new]; 

     [imageData writeToFile:newFilePath atomically:YES]; 

     imgpath=[[NSString alloc]initWithString:newFilePath]; 
     NSLog(@"doc img in img method === %@",imgpath); 
    } 


    databasepath=[app getDBPath]; // i have this method in delegate 
     if (sqlite3_open([databasepath UTF8String], &dbAssessor) == SQLITE_OK) 
     { 
      NSString *selectSql = [NSString stringWithFormat:@"insert into imagetb(imagename,image) VALUES(\"%@\",\"%@\") ;",yourImgName,imgpath]; 

      NSLog(@"Query : %@",selectSql); 

      const char *sqlStatement = [selectSql UTF8String]; 
      sqlite3_stmt *query_stmt; 
      sqlite3_prepare(dbAssessor, sqlStatement, -1, &query_stmt, NULL); 

      if(sqlite3_step(query_stmt)== SQLITE_DONE) 
      { 
       NSLog(@"home image updated. :)"); 
       app.houseImage=imgpath; 
      } 
      else 
      { 
       UIAlertView *alert = [[UIAlertView alloc] 
             initWithTitle:@"Sorry" message:@"Failed To Save Home Image." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]; 
       [alert show]; 
       [alert release]; 
      } 
      sqlite3_finalize(query_stmt); 
     } 
     sqlite3_close(dbAssessor);

图像代码个

来源

2013-03-07 05:46:39

这个问题与从图像选择器中选取图像有什么关系？ – rmaddy 2013-03-07 06:04:42

您更好地利用缓存来存储您的影像，并使用数据库来存储他们的名字或一些独特的ID

来源

2013-03-07 05:58:30

可以清除缓存目录。这不是存储无法替换的数据的好地方。 – rmaddy 2013-03-07 06:03:27

而不是存储图像数据，您应该用于将图像名称存储在数据库中。所以它会减少从DB存储和提取的时间 – Apple 2013-03-07 06:36:21

如何在iPhone中的sqlite数据库中存储图像？

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