Simple use of IOS fingerprint recognition

First import the Localauthentication framework

Then import the header file

#import <LocalAuthentication/LAPublicDefines.h>

-(void) beginauthentication{lacontext *context = [[Lacontext alloc] init];    Nserror *eror = nil;       NSString *reson = @ "fingerprint identification";  if ([Context Canevaluatepolicy:lapolicydeviceownerauthenticationwithbiometrics Error:&eror]) {//Support fingerprint identification [context Evaluatepolicy:lapolicydeviceownerauthenticationwithbiometrics Localizedreason:reson reply:^ (BOOL success, NSError            * _nullable error) {if (success) {//Fingerprint verification succeeded NSLog (@ "identify success"); }else{//Specific Erro.code error description in LAError.h header file switch (error.code) {case LAEr                        roruserfallback://User Select Enter password NSLog (@ "Enter password");                    Break                    Case laerrortouchidlockout://User Multiple validation failed NSLog (@ "multiple errors");                        Default:nslog (@ "ErrorCode = =%@", error);                Break                     }            }                                            }];     }else{//does not support fingerprint identification NSLog (@ "%@", eror); }}

Simple use of IOS fingerprint recognition