I am newbie with iPhone programming. I have a task that upload image from iphone to server and store it in Mysql database on server. After that I retrieve the image from database and display it on iPhone.
NSURLConnection *)connection { self.connection = nil; NSString * dataStr = [[NSString alloc] initWithData:self.receivedData encoding:NSUTF8StringEncoding]; NSArray * lines = [dataStr componentsSeparatedByCharactersInSet:[NSCharacterSet newlineCharacterSet]]; NSMutableArray * res = [NSMutableArray arrayWithCapacity:[lines count]]; NSString * line = nil; Picture * pic = nil; for (NSUInteger i = 0; i < [lines count]; i++) { line = (NSString*) [lines objectAtIndex:i]; NSArray * arr = [line componentsSeparatedByString
","]; pic = [[Picture alloc] init]; pic.pictureId = [[NSDecimalNumber decimalNumberWithStringNSString *) [arr objectAtIndex:0]] intValue]; pic.title = (NSString*) [arr objectAtIndex:1]; pic.description = (NSString*) [arr objectAtIndex:2]; pic.imageData = http://stackoverflow.com/questions/3924520/(NSData*) [arr objectAtIndex:3]; pic.rate = [[NSDecimalNumber decimalNumberWithStringNSString*) [arr objectAtIndex:4]] floatValue]; pic.numberOfRate = [[NSDecimalNumber decimalNumberWithStringNSString*) [arr objectAtIndex:5]] intValue]; pic.numberOfDownload = [[NSDecimalNumber decimalNumberWithStringNSString*) [arr objectAtIndex:6]] intValue]; pic.numberOfComment = [[NSDecimalNumber decimalNumberWithStringNSString*) [arr objectAtIndex:7]] intValue]; [res addObject
ic]; [pic release]; } self.picturesData = res; //display a image [self displayAImage]; [dataStr release];}\[/code\]But the dataStr is nil in the method. Any one help me to solve this problem. Any help would be appreciated.Thanks.
- On Upload:I used ASIFormDataRequest to send image data to server and a PHP script (uploadpicture.php) will store image data to database with blob datatype.
- On Download:I used NSURLRequest with NSURLConnection and a PHP script (downloadpicture.php) to retrieve image from database and send it back to iphone.This is a PHP script:$con = mysql_connect("localhost:8889", "root", "root");if (!$con) { echo "can not connect database"; die("Could not connect: " .mysql_error());}echo "Connect database succesfully";mysql_select_db("myDatabase", $con);$result = mysql_query("select * from pictures" ,$con);while ($row = mysql_fetch_array($result, MYSQL_ASSOC)) { echo "{$row['id']}"; echo "{$row['title']}"; echo "{$row['description']}"; echo "{$row['image']}"; echo "{$row['rate']}"; echo "{$row['numberofrate']}"; echo "{$row['numberofdownload']}"; echo "{$row['numberofcomment']}"; echo "
";}mysql_close($con);echo "completed";
NSURLConnection *)connection { self.connection = nil; NSString * dataStr = [[NSString alloc] initWithData:self.receivedData encoding:NSUTF8StringEncoding]; NSArray * lines = [dataStr componentsSeparatedByCharactersInSet:[NSCharacterSet newlineCharacterSet]]; NSMutableArray * res = [NSMutableArray arrayWithCapacity:[lines count]]; NSString * line = nil; Picture * pic = nil; for (NSUInteger i = 0; i < [lines count]; i++) { line = (NSString*) [lines objectAtIndex:i]; NSArray * arr = [line componentsSeparatedByString","]; pic = [[Picture alloc] init]; pic.pictureId = [[NSDecimalNumber decimalNumberWithStringNSString *) [arr objectAtIndex:0]] intValue]; pic.title = (NSString*) [arr objectAtIndex:1]; pic.description = (NSString*) [arr objectAtIndex:2]; pic.imageData = http://stackoverflow.com/questions/3924520/(NSData*) [arr objectAtIndex:3]; pic.rate = [[NSDecimalNumber decimalNumberWithStringNSString*) [arr objectAtIndex:4]] floatValue]; pic.numberOfRate = [[NSDecimalNumber decimalNumberWithStringNSString*) [arr objectAtIndex:5]] intValue]; pic.numberOfDownload = [[NSDecimalNumber decimalNumberWithStringNSString*) [arr objectAtIndex:6]] intValue]; pic.numberOfComment = [[NSDecimalNumber decimalNumberWithStringNSString*) [arr objectAtIndex:7]] intValue]; [res addObjectic]; [pic release]; } self.picturesData = res; //display a image [self displayAImage]; [dataStr release];}\[/code\]But the dataStr is nil in the method. Any one help me to solve this problem. Any help would be appreciated.Thanks.