Objective-C API Reference - Decode Methods

decodeFileWithName

Decode barcodes from a specified image file.

- (NSArray<iTextResult*>* _Nullable)decodeFileWithName:(NSString* _Nonnull)name templateName:(NSString* _Nonnull)templateName error:(NSError* _Nullable * _Nullable)error;

Parameters

[in] name The local path of the file.
[in] templateName The template name.
[in,out] error Input a pointer to an error object. If an error occurs, this pointer is set to an actual error object containing the error information. You may specify nil for this parameter if you do not want the error information.

Return value

All successfully decoded barcode results.

Code Snippet

• Objective-C
• Swift

1. DynamsoftBarcodeReader *barcodeReader;
   barcodeReader = [[DynamsoftBarcodeReader alloc] initWithLicense:@"t0260NwAAAHV***************"];
   iTextResult *result;
   NSError __autoreleasing * _Nullable error;
   result = [barcodeReader decodeFileWithName:@"your file path" templateName:@"" error:&error];
   

2. let barcodeReader = DynamsoftBarcodeReader.init(license: "t0260NwAAAHV***************")
   let error: NSError? = NSError()
   let result = barcodeReader.decodeFileWithName(name:"your file path",templateName:"",error:&error)
   

decodeImage

Decode barcodes from an image file in memory.

- (NSArray<iTextResult*>* _Nullable)decodeImage:(UIImage* _Nonnull)image withTemplate:(NSString* _Nonnull)templateName error:(NSError* _Nullable * _Nullable)error;

Parameters

[in] image The image file in memory.
[in] templateName The template name.
[in,out] error Input a pointer to an error object. If an error occurs, this pointer is set to an actual error object containing the error information. You may specify nil for this parameter if you do not want the error information.

Return value

All successfully decoded barcode results.

Code Snippet

• Objective-C
• Swift

1. DynamsoftBarcodeReader *barcodeReader;
   barcodeReader = [[DynamsoftBarcodeReader alloc] initWithLicense:@"t0260NwAAAHV***************"];
   iTextResult *result;
   UIImage *image;
   NSError __autoreleasing * _Nullable error;
   result = [barcodeReader decodeImage:image withTemplate:@"" error:&error];
   

2. let barcodeReader = DynamsoftBarcodeReader.init(license: "t0260NwAAAHV***************")
   let image: UIImage? = UIImage()
   let error: NSError? = NSError()
   let result = barcodeReader.decodeImage(image:image withTemplate:"" error:&error)
   

decodeBuffer

Decode barcodes from the memory buffer containing image pixels in a defined format.

- (NSArray<iTextResult*>* _Nullable)decodeBuffer:(NSData* _Nonnull)buffer withWidth:(NSInteger)width height:(NSInteger)height stride:(NSInteger)stride format:(EnumImagePixelFormat)format templateName:(NSString* _Nonnull)templateName error:(NSError* _Nullable * _Nullable)error;

Parameters

[in] buffer The array of bytes that contain the image data.
[in] width The width of the image in pixels.
[in] height The height of the image in pixels.
[in] stride The stride (or scan width) of the image.
[in] format The image pixel format used in the image byte array.
[in] templateName The template name.
[in, out] error Input a pointer to an error object. If an error occurs, this pointer is set to an actual error object containing the error information. You may specify nil for this parameter if you do not want the error information.

Return value

All successfully decoded barcode results.

Code Snippet

• Objective-C
• Swift

1. DynamsoftBarcodeReader *barcodeReader;
   barcodeReader = [[DynamsoftBarcodeReader alloc] initWithLicense:@"t0260NwAAAHV***************"];
   iTextResult *result;
   NSData *bufferBytes;
   NSInteger iWidth = 0;
   NSInteger iHeight = 0;
   NSInteger iStride = 0;
   NSInteger format;
   NSError __autoreleasing * _Nullable error;
   result = [barcodeReader decodeBuffer:bufferBytes withWidth:iWidth height:iHeight stride:iStride format:format templateName:@"" error:&error];
   

2. let barcodeReader = DynamsoftBarcodeReader.init(license: "t0260NwAAAHV***************")
   let error: NSError? = NSError()
   let bufferBytes:Data?
   let width = 0
   let height = 0
   let stride = 0
   let format:Int
   let result = try? barcodeReader.decodeBuffer(bufferBytes, width: width, height: height, stride: stride, format: format, templateName: "")
   

decodeBase64

Decode barcodes from an image file encoded as a base64 string.

DBR_API int DBR_DecodeBase64String (void* barcodeReader, const char* pBase64String, const char* pTemplateName)

Parameters

[in] base64 A base64 encoded string that represents an image.
[in] templateName The template name.
[in,out] error Input a pointer to an error object. If an error occurs, this pointer is set to an actual error object containing the error information. You may specify nil for this parameter if you do not want the error information.

Return value

All successfully decoded barcode results.

Code Snippet

• Objective-C
• Swift

1. DynamsoftBarcodeReader *barcodeReader;
   barcodeReader = [[DynamsoftBarcodeReader alloc] initWithLicense:@"t0260NwAAAHV***************"];
   iTextResult *result;
   NSError __autoreleasing * _Nullable error;
   result = [barcodeReader decodeBase64:@"file in base64 string" withTemplate:@"" error:&error];
   

2. let barcodeReader = DynamsoftBarcodeReader.init(license: "t0260NwAAAHV***************") 
   let error: NSError? = NSError() 
   let result = barcodeReader.decodeBase64(base64: file in base64 string, withTemplate: "", error: &error)