FAQ

Q1:Run error: "SDK initialization failed"?

Check:

• The license file contains your current APP bundleID;
• All SDK resource have been exported to your current APP project;
• The phone time has been set to invalid time;
• The license name read in DFLivenessController is the same to the DFLicense file name.

  NSString *licPath = [[NSBundle mainBundle] pathForResource:@"DFLicense" ofType:@""];
  

Q2:Compile error: "Undefined symbols for architecture arm64: "std::nothrow", referenced from:"?

Check:

• All SDK resource have been exported to your current APP project;
• "-lstdc++" has been added to Xcode–>Targets–>Build Setting–>Linking–>Other Linker Flags.

Q3:What will be returned when silent liveness detecting successfully?

You can get returned paramters in the following delegate methonds when using DFLivenessController:

- (void)livenessDidSuccessfulGetData:(NSData *)encryTarData
                            dfImages:(NSArray *)arrDFImage
                        successScore:(float)successScore;

- (void)livenessDidSuccessfulGetData:(NSData *)encryTarData
                            dfImages:(NSArray *)arrDFImage
                        successScore:(float)successScore
                              isHack:(BOOL)isHack;

encryTarData: protobuf data，arrDFImage: images, isHack: is hack or not when set autoAntiHack to YES, successScore has been deprecated.

Q4:How to upload protobuf data for antiHack and how to configure api_id、api_secret?

You can get protobuf data in the following methods when you set autoAntiHack to NO:

- (void)livenessDidSuccessfulGetData:(NSData *)encryTarData
                            dfImages:(NSArray *)arrDFImage
                        successScore:(float)successScore;

Call server api to upload protobuf data(encryTarData) and put protobuf data to request body, set api_id、api_secret to request header field. You can get antiHack score when request successfully and is hack when the result score is bigger than the default threshold(0.98).