#import "ViewController.h"

#import <LocalAuthentication/LocalAuthentication.h>

@interface ViewController ()

@end

@implementation ViewController

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {

//指纹识别核心代码 // 创建本地认证上下文

LAContext *context = [[LAContext alloc] init];

// 检验设备是否支持指纹识别

// Biometrics:生物统计学 ,这里就是指纹识别

if(![context canEvaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics error:nil]){

NSLog(@"你的设备不支持指纹识别!");

return;

}

//  进行指纹识别

//  localizedReason: 你为什么需要指纹识别

[context evaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics localizedReason:@"支付请录入指纹" reply:^(BOOL success, NSError * _Nullable error) {

if (success) {

NSLog(@"指纹识别成功");

}else{

NSLog(@"指纹识别失败:%@",error);

}

}];

}

@end