事前准备>

事前准备 #

添加权限请求描述: e.g. “App需要TouchID或FaceID权限，来验证使用者是否是手机所有者”

Privacy - Face ID Usage Description

NSFaceIDUsageDescription

引入相关的库

LocalAuthentication

引入头文件

#import <LocalAuthentication/LocalAuthentication.h>

使用>

使用 #

- (void)faceID {
    
    LAContext *context = [LAContext new];
    context.localizedFallbackTitle = @"localizedFallbackTitle";
    NSError *error;
    LAPolicy policy = LAPolicyDeviceOwnerAuthenticationWithBiometrics;
    if ([context canEvaluatePolicy:policy error:&error]) {
        [context evaluatePolicy:policy localizedReason:@"通过Home键验证已有指纹" reply:^(BOOL success, NSError * _Nullable error) {
                    if (success) {
                        // success
                        MNLog(self, @" successed!!!");
                    } else if (error) {
                        MNLog(self, @" face error.code = %@", error);
                        switch (error.code) {
                            case LAErrorAuthenticationFailed:
                                break;
                            default:
                                break;
                        }
                    } else {
                        // other
                        MNLog(self, @" face id the other reason!!!");
                    }
        }];
    } else {
        // error
        MNLog(self, @"还没有设置id, %@", error);
    }
    
}