iOS Touch ID

- (IBAction)btnScanfClick:(id)sender {

self.context = [LAContext new];
[self.context evaluatePolicy:LAPolicyDeviceOwnerAuthentication localizedReason:@"请输入指纹" reply:^(BOOL success, NSError * _Nullable error) {

if (success) {
NSLog(@"验证成功");
}

if (error) {
NSLog(@"验证失败，失败原因：%@",error);
}

}];
}

- (IBAction)btnStopClick:(id)sender {
[self.context invalidate];
}