iOS 集成FaceId和TouchID

现在的iPhone手机一共有三种解锁方式

1、FaceId 2、TouchID 3、老手机密码解锁

我们都知道现在的支持FaceId的手机一共有四种，X、XR、XS、XSMax。其他是TouchID和密码解锁。所以在使用FaceId的时候我们需要判断是否支持。所以我们先判断是否支持

首先、我们先导入一个官方库

#import <SystemConfiguration/CaptiveNetwork.h>

然后我们导入下面的方法


/**判断手机是否是异形屏幕@return YES 是 异形屏幕*/
+ (BOOL)iphoneIsProfiledScreen {struct utsname systemInfo;uname(&systemInfo);NSString*platform = [NSString stringWithCString: systemInfo.machine encoding:NSASCIIStringEncoding];if([platform isEqualToString:@"iPhone10,3"] || [platform isEqualToString:@"iPhone10,6"]  || [platform isEqualToString:@"iPhone11,8"] || [platform isEqualToString:@"iPhone11,2"] || [platform isEqualToString:@"iPhone11,6"] || [platform isEqualToString:@"iPhone11,4"] ) {return YES;} else {return NO;}
}

接下来我们自己写也可以，但是还要做好封装，不方便，所以我在网上找到了一个类，我们导入一个类，这个类是我在网上找到的，使用更方便，下面这个类的.h文件


#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>typedef NS_ENUM(NSInteger, LAContextErrorType) {LAContextErrorAuthorFailure   = 0,  // 指纹识别或FaceID识别错误LAContextErrorAuthorNotAccess = 1,  // 指纹识别或FaceID不支持等其他原因
};typedef void(^LAContext_Success)(void);
typedef void(^LAContext_Failure)(NSError *tyError, LAContextErrorType feedType);@interface LAContextManager : NSObject+ (void)callLAContextManagerWithController:(UIViewController *)currentVCsuccess:(LAContext_Success)successfailure:(LAContext_Failure)failure;@end

下面是.m文件


#import "LAContextManager.h"
#import <LocalAuthentication/LocalAuthentication.h>
@implementation LAContextManager+ (void)callLAContextManagerWithController:(UIViewController *)currentVCsuccess:(LAContext_Success)successfailure:(LAContext_Failure)failure {if ( ![currentVC isKindOfClass:[UIViewController class]] ) {return;}NSString *message = [NSObject iphoneIsProfiledScreen] ? @"面容 ID 短时间内失败多次，需要验证手机密码" : @"请把你的手指放到Home键上";// 当deviceType为LAPolicyDeviceOwnerAuthentication的时候，iPhone X会需要前面这段描述NSInteger deviceType = LAPolicyDeviceOwnerAuthenticationWithBiometrics;//单纯指纹或FaceID,LAPolicyDeviceOwnerAuthentication会有密码验证LAContext *laContext = [[LAContext alloc] init];laContext.localizedFallbackTitle = @""; // 隐藏左边的按钮(默认是忘记密码的按钮)NSError *error = nil;BOOL isSupport = [laContext canEvaluatePolicy:(deviceType) error:&error];if ( isSupport ) {[laContext evaluatePolicy:(deviceType) localizedReason:message reply:^(BOOL s, NSError * _Nullable error) {if ( s ) {success();} else {failure(error, LAContextErrorAuthorFailure);}}];} else {NSLog(@" - - - -- - - -- - - - --%@",error);failure(error, LAContextErrorAuthorNotAccess);}
}@end

这样我们就对这个识别进行简单的封装了、接下来就是使用，我们引入这个类

#import "LAContextManager.h"

下面是使用方法

[LAContextManager callLAContextManagerWithController:self success:^{dispatch_async(dispatch_get_main_queue(), ^{// @TODO success[NSObject showToastView:self.view WithMessage:@"打开成功"];});} failure:^(NSError *tyError, LAContextErrorType feedType) {dispatch_async(dispatch_get_main_queue(), ^{// @TODOif (tyError.code == -8) {// 超出TouchID尝试次数或FaceID尝试次数，已被锁[NSObject showToastView:self.view WithMessage:@"超出TouchID尝试次数或FaceID尝试次数"];} else if (tyError.code == -7) {// 未开启TouchID权限(没有可用的指纹)[NSObject showToastView:self.view WithMessage:[NSObject iphoneIsProfiledScreen] ? @"iPhone 未设置FaceId" : @"未开启TouchID权限(没有可用的指纹)"];} else if (tyError.code == -6) {if ( [NSObject iphoneIsProfiledScreen] ) {// iPhoneX 设置里面没有开启FaceID权限[NSObject showToastView:self.view WithMessage:@"iPhone 设置里面没有开启FaceID权限"];} else {// 非iPhoneX手机且该手机不支持TouchID(如iPhone5、iPhone4s)[NSObject showToastView:self.view WithMessage:@"非iPhoneX手机且该手机不支持TouchID(如iPhone5、iPhone4s)"];}} else {// 其他error情况 如用户主动取消等NSLog(@"其他error情况 如用户主动取消等========");[NSObject showToastView:self.view WithMessage:@"其他error情况 如用户主动取消等========"];}});}];

下面这个方法是类似与安卓的吐丝，一个黑色提示框

[NSObject showToastView:self.view WithMessage:@""];


//Toast提示框
+(void)showToastView:(UIView *)uiview WithMessage:(NSString *)message
{UIView *showview = [[UIView alloc]init];showview.backgroundColor = [UIColor colorWithRed:0 green:0 blue:0 alpha:.7];showview.frame = CGRectMake(1, 1, 1, 1);showview.layer.cornerRadius = 5.0f;showview.layer.masksToBounds = YES;UIWindow * window = [[UIApplication sharedApplication].windows lastObject];[window addSubview:showview];UILabel *label = [[UILabel alloc]init];CGSize LabelSize = [message sizeWithFont:[UIFont systemFontOfSize:17] constrainedToSize:CGSizeMake(290, 9000)];label.frame = CGRectMake(10, 5, LabelSize.width, LabelSize.height);label.text = message;label.textColor = [UIColor whiteColor];label.textAlignment = 1;label.backgroundColor = [UIColor clearColor];label.font = [UIFont boldSystemFontOfSize:15];label.numberOfLines = 0;[showview addSubview:label];showview.frame = CGRectMake((uiview.frame.size.width - LabelSize.width - 20)/2, uiview.frame.size.height - LabelSize.height-100, LabelSize.width+20, LabelSize.height+10);[UIView animateWithDuration:2.0 animations:^{showview.alpha = 0;} completion:^(BOOL finished) {[showview removeFromSuperview];}];
}