I have an IPAD application which is supporting only in landscape mode. In which i wanted to use ZbarSDK for reading bar codes,i created a view in my view controller then load it with background of the readerviewcontroller.working fine in iphone.But in ipad with this orientations it is behaving strage,like loading in portrait mode,etc.I am using this but no luck.reader.supportedOrientationsMask = ZBarOrientationMask(UIInterfaceOrientationLandscapeRightcan anybody help me how to use this sdk correctly in ipad with landscape orientations?
I have just had problems with the embedded reader view and read that a call to setNeedsLayout was missing on rotation, not sure if it will help someone but here is what fixed my problems
- (void) willRotateToInterfaceOrientation: (UIInterfaceOrientation) orient duration: (NSTimeInterval) duration
{
[self.readerView willRotateToInterfaceOrientation:orient duration:duration];
[self.readerView setNeedsLayout];
}
i think use bellow code may this help you...
ZBarReaderViewController *reader = [ZBarReaderViewController new];
[reader shouldAutorotateToInterfaceOrientation:UIInterfaceOrientationLandscapeRight];
hope,this help you..
:)
Works fine for me. Our iPad app supports only Landscape orientation:
// ADD: present a barcode reader that scans from the camera feed
ZBarReaderViewController *reader = [ZBarReaderViewController new];
reader.readerDelegate = self;
ScanOverlay overlayController = [[ScanOverlay alloc] initWithNibName:#"ScanOverlay" bundle:nil];
reader.cameraOverlayView = overlayController.view;
ZBarImageScanner *scanner = reader.scanner;
// TODO: (optional) additional reader configuration here
reader.supportedOrientationsMask = UIInterfaceOrientationMaskLandscape;
reader.wantsFullScreenLayout = YES;
reader.showsZBarControls = NO; //If we don't set this to NO, the overlay may not display at all
reader.tracksSymbols = YES;
[overlayController willRotateToInterfaceOrientation:YES duration:0.5];
// ADD: present a barcode reader that scans from the camera feed
// EXAMPLE: disable rarely used I2/5 to improve performance
[scanner setSymbology: ZBAR_I25
config: ZBAR_CFG_ENABLE
to: 0];
//Show the scanner view
if([self respondsToSelector:#selector(presentViewController:animated:completion:)]){
[self presentViewController:reader animated:YES completion:^(void){}];
} else if([self respondsToSelector:#selector(presentModalViewController:animated:)]) {
[self presentModalViewController:reader animated:YES];
} else {
NSLog(#"Error! Can't present the View Controller");
}
Related
I am using ZBar iPhone SDK in one of my projects (iOS SDK 5.1 ,XCode 4.4.1 and device running iOS 5.5.1). I am using the embedded scanner from the examples provided in the SDk itself.
Now the issue which I am facing is that I successfully scan a bar code and move to another view controller ( using navigation controller). When I come back (pop the second view controller) the scanner i.e the ZBarReaderView doesn't scan the subsequent bar codes , infact the overlay shows a blur image of the scanned barcode and is never able to scan it properly.
This is what all I have implemented . In BarScannerViewController.h I have declared
ZBarReaderView* readerView;
with property
#property (nonatomic , retain) IBOutlet UIImageView* imgvScannedBarCode;
Now this is connected to one of the views in xib.
Finally I use set up the required methods as follows -
- (void)viewDidLoad {
[super viewDidLoad];
// the delegate receives decode results
readerView.readerDelegate = self;
[readerView start];
}
- (void) viewDidAppear: (BOOL) animated {
// run the reader when the view is visible
[activityIndicatorScanning startAnimating];
[readerView start];
}
- (void) viewWillDisappear: (BOOL) animated {
[activityIndicatorScanning stopAnimating];
[readerView stop];
}
With all this set up when I scan any bar code say EAN123 for the first time I get the call back in
- (void) readerView: (ZBarReaderView*) view
didReadSymbols: (ZBarSymbolSet*) syms
fromImage: (UIImage*) img
{
// do something useful with results
ZBarSymbol *symbol = nil;
for(symbol in syms) {
barCodeFound = YES;
break;
}
// EXAMPLE: do something useful with the barcode data
NSLog(#"%#",symbol.data);
}
but on subsequent runs (After I push a view and come back on this screen again) I get blurred view.
Am I missing something here ? Any help/Suggestion/Comments would be helpful.
Here's the code that I use to start (and endlessly restart) the scanner. Interestingly, I note that I never stop the scan, but it works very reliably.
- (void) startScan
{
ZBarReaderViewController *reader = [ZBarReaderViewController new];
reader.readerDelegate = self;
ZBarImageScanner *scanner = reader.scanner;
[scanner setSymbology: ZBAR_I25
config: ZBAR_CFG_ENABLE
to: 0];
// present and release the controller
[self presentViewController:reader animated:YES completion:nil]; // Modal
[reader release];
}
I could solve the Blur issue by reconfiguring the SDK in my project. I followed the embedded scanner example as provided on ZBarSDk. I guess I might have missed some essential settings while configuring it earlier.
I have an application in which I have a UIView (Zbarsdk reader view) in my xib. When a button is tapped, that view should be loaded. But actually when the button is tapped, the previous view is loading at first (from which I came to my view). But after running once then again running then the correct view is loading? (From login I came to home. In home I have one button to load one view that is separate in my xib, but when running first it is loading the login screen again. But without deleting that build when u run again that code in simulator is loading that correct view). Does anybody know why?
- (IBAction) tappressed
{
// ADD: present a barcode reader that scans from the camera feed
ZBarReaderViewController *reader = [ZBarReaderViewController new];
reader.readerDelegate = self;
[reader willRotateToInterfaceOrientation:UIInterfaceOrientationPortrait duration:0];
//[self.readerView willRotateToInterfaceOrientation:orient duration:0];
//reader.supportedOrientationsMask = ZBarOrientationMask(UIInterfaceOrientationLandscapeRight);
// [reader shouldAutorotateToInterfaceOrientation:UIInterfaceOrientationLandscapeRight];
//reader.supportedOrientationsMask = ZBarOrientationMask(UIInterfaceOrientationLandscapeLeft);
reader.sourceType=UIImagePickerControllerSourceTypeCamera;
// UIImageView *overlayImage=[[UIImageView alloc] initWithImage:[UIImage imageNamed:#"overlaygraphic.png"]];
//overlayImage.bounds=CGRectMake(50, 75, 320-100, 480-150);
reader.cameraOverlayView=cameraOverlay;
ZBarImageScanner *scanner = reader.scanner;
// TODO: (optional) additional reader configuration here
// EXAMPLE: disable rarely used I2/5 to improve performance
[scanner setSymbology: ZBAR_I25
config: ZBAR_CFG_ENABLE
to: 0];
// present and release the controller
[self presentModalViewController:reader animated:YES];
// [self.view addSubview:reader.view];
[reader release];
}
i've got a ZBarReaderView created from storyboard with 216x20 px which is shown as roughly 230x50 px because ZBarReaderView doesn't take it's size too serious...
It all works very well, however it behaves really strange when I call start on that readerView. It starts the cam but then in maybe half a second the readerView zooms a bit and the camera picture inside the readerView moves down and then up again.
It's not terrible but it look kinda bad. Anyone got any ideas what might be causing this and how to solve it? Maybe the sdk has some sort of hidden callback for the readiness of the scanner, i could hide it until the scanner says it's ready and then show the scanner like .5 seconds later...
barcodeReader is the iboutlet to the ZBarReaderView and scannerLoading is an iboutlet to a uiactivityindicatorview which is animating until the scanner is loaded.
These are the only settings which are changed from default, except the frame which is set in the storyboard of course.
[barcodeReader setReaderDelegate:self];
[barcodeReader setAllowsPinchZoom:false];
[barcodeReader start];
/* this works because [barcodeReader start] blocks ui updates until the scanner
is running, i know it's not a good solution but since there doesn't seem to
be a callback or delegate method like scannerDidStart or something it seems
to be the only way... */
[scannerLoading stopAnimating];
Thanks for your help!
I just posted an answer to a retaliated question:
ZBarReadview with custom size from StoryBoard,but when it's called,it's size is not I set
Maybe the answer also solves your problem.
In short:
When using Interface Builder or Storyboard to create a view and assign the ZBarReaderView to it, you have to check "Clip Subviews" in the properties for the camera image to keep the size of the view.
Just add another view to make it as cameraoverlayview with an image view having the image which is having required part of it as transparent.then in the button action `
// ADD: present a barcode reader that scans from the camera feed
ZBarReaderViewController *reader = [ZBarReaderViewController new];
reader.readerDelegate = self;
reader.supportedOrientationsMask = ZBarOrientationMaskAll;
reader.sourceType=UIImagePickerControllerSourceTypeCamera;
//reader.cameraDevice = UIImagePickerControllerCameraDeviceFront;
reader.cameraOverlayView=cameraOverlay;
if( [UIImagePickerController isCameraDeviceAvailable: UIImagePickerControllerCameraDeviceFront ])
{
reader.cameraDevice = UIImagePickerControllerCameraDeviceFront;
}
ZBarImageScanner *scanner = reader.scanner;
reader.wantsFullScreenLayout = YES;
// TODO: (optional) additional reader configuration here
// EXAMPLE: disable rarely used I2/5 to improve performance
[scanner setSymbology: ZBAR_I25
config: ZBAR_CFG_ENABLE
to: 0];
reader.showsZBarControls = NO;
// present and release the controller
[self presentModalViewController:reader animated:YES];
//[appdel.navigationController pushViewController:reader animated:YES];
//[reader.view addSubview:collect];
[reader release];add this and then also add
`- (void) imagePickerController: (UIImagePickerController*) reader
didFinishPickingMediaWithInfo: (NSDictionary*) info
{
// ADD: get the decode results
id results =
[info objectForKey: ZBarReaderControllerResults];
ZBarSymbol *symbol = nil;
for(symbol in results)
// EXAMPLE: just grab the first barcode
break;
[self rewards:symbol.data];
}
`
as a method .hope this will solve your issue
I am working on an application that scans the QR codes.When the scan button is clicked,it goes to the generic full page camera view.But i need to customize that page so that a logo must be shown at the bottom and a button at the top.the scanning area should be in between these two.How can i implement the?anyone have answer?the code i am using is given below
- (IBAction) scanButtonTapped
{
// ADD: present a barcode reader that scans from the camera feed
ZBarReaderViewController *reader = [ZBarReaderViewController new];
reader.readerDelegate = self;
reader.supportedOrientationsMask = ZBarOrientationMaskAll;
ZBarImageScanner *scanner = reader.scanner;
[scanner setSymbology: ZBAR_I25
config: ZBAR_CFG_ENABLE
to: 0];
// present and release the controller
[self presentModalViewController: reader
animated: YES];
[reader release];
}
You can set property cameraOverlayView of ZBarReaderViewController. Some docs is here.
ZBarReaderViewController* reader = [[ZBarReaderViewController alloc] init];
reader.cameraOverlayView = yourCustomView;
To change tabBar you can add your subview.
You can access it using this:
UIView* subView1 = [reader.view.subviews objectAtIndex:2];
UIView* tabBar = [subView1.subviews objectAtIndex:0];
Now you can customize tabBar in the way you like.
The code to set image to imageView is:
- (void)setSelected:(BOOL)selected animated:(BOOL)animated {
SDWebImageManager *manager = [SDWebImageManager sharedManager];
UIImage *cachedImage = [manager imageWithURL:_url];
if (cachedImage)
{
_imageView.image = cachedImage;
[spinner stopAnimating];
}
else
{
[spinner startAnimating];
[manager downloadWithURL:_url delegate:self];
}
// Configure the view for the selected state
[super setSelected:selected animated:animated];
}
- (void)webImageManager:(SDWebImageManager *)imageManager
didFinishWithImage:(UIImage *)_image
{
[spinner stopAnimating];
_imageView.image = _image;
[self setNeedsLayout];
}
I use SDWebImage
this works every time in simulator, but when I run the app in the device (Ipod touch)
80 % of the images is just black, but if I go to another view and back the images are set (from cache).
I have try to set delay on _imageView = _image, but change.
(Answered in a question edit. Converted to a community wiki answer. See Question with no answers, but issue solved in the comments (or extended in chat) )
The OP wrote:
Now I have try the code on a Iphone 3gs and it works perfect, can understand why it wont work on ipod touch.
When i Compiled and Run as "Release" it works on ipod, but not in as debugger. Wierd..