iOS实现启动引导页与指纹解锁的方法详解

#import "AppDelegate.h"#import "GuidePagesViewController.h"#import "LoginViewController.h"@interface AppDelegate ()@end@implementation AppDelegate- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { self.window = [[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds]; self.window.backgroundColor = [UIColor whiteColor]; NSUserDefaults * userDefault = [NSUserDefaults standardUserDefaults]; if (![userDefault boolForKey:@"isNotFirst"]) {//如果用户是第一次登录  self.window.rootViewController = [[GuidePagesViewController alloc]init]; }else{//否则直接进入登录页面  self.window.rootViewController = [[LoginViewController alloc]init]; } [self.window makeKeyAndVisible]; return YES;}

//// GuidePagesViewController.m// 登录引导页开发//// Created by hj on 2018/1/31.// Copyright © 2018年 hj. All rights reserved.//#import "GuidePagesViewController.h"#import "LoginViewController.h"#define ScreenWidth [UIScreen mainScreen].bounds.size.width#define ScreenHeight [UIScreen mainScreen].bounds.size.height@interface GuidePagesViewController ()<UIScrollViewDelegate>@property(nonatomic ,strong) UIScrollView * mainScrollV;@property(nonatomic ,strong) UIPageControl * pageControl;@property(nonatomic ,strong) NSMutableArray * images;@end@implementation GuidePagesViewController- (void)viewDidLoad { [super viewDidLoad]; [self.view addSubview:self.mainScrollV]; [self.view addSubview:self.pageControl]; }-(UIScrollView *)mainScrollV{ if (!_mainScrollV) {  _mainScrollV = [[UIScrollView alloc]initWithFrame:self.view.bounds];  _mainScrollV.bounces = NO;  _mainScrollV.pagingEnabled = YES;  _mainScrollV.showsHorizontalScrollIndicator = NO;  _mainScrollV.delegate = self;  _mainScrollV.contentSize = CGSizeMake(self.images.count * ScreenWidth, ScreenHeight);  [self addSubImageViews]; } return _mainScrollV;}-(NSMutableArray *)images{ if (!_images) {  _images = [NSMutableArray array];  NSArray * imageNames = @[@"u1",@"u2",@"u3",@"u4"];  for (NSString * name in imageNames) {   [self.images addObject:[UIImage imageNamed:name]];  } } return _images;}- (void)addSubImageViews{ for (int i = 0; i < self.images.count; i++) {  UIImageView * imageV = [[UIImageView alloc]initWithFrame:CGRectMake(i * ScreenWidth, 0, ScreenWidth, ScreenHeight)];  imageV.image = self.images[i];  [_mainScrollV addSubview:imageV];  if (i == self.images.count - 1){//最后一张图片时添加点击进入按钮   imageV.userInteractionEnabled = YES;   UIButton * btn = [UIButton buttonWithType:UIButtonTypeCustom];   btn.frame = CGRectMake(ScreenWidth * 0.5 - 80, ScreenHeight * 0.7, 160, 40);   [btn setTitle:@"点击一下,你就知道" forState:UIControlStateNormal];   [btn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];   btn.backgroundColor = [UIColor redColor];   btn.layer.cornerRadius = 20;   btn.layer.borderWidth = 1;   btn.layer.borderColor = [UIColor redColor].CGColor;   [btn addTarget:self action:@selector(btnClick) forControlEvents:UIControlEventTouchUpInside];   [imageV addSubview:btn];  } }}//点击按钮保存第一次登录的标记到本地并且跳入登录界面- (void)btnClick{ //保存标记到本地 NSUserDefaults * userDef = [NSUserDefaults standardUserDefaults]; [userDef setBool:YES forKey:@"isNotFirst"]; [userDef synchronize]; //切换视图控制器 [UIApplication sharedApplication].keyWindow.rootViewController = [[LoginViewController alloc]init];}-(UIPageControl *)pageControl{ if (!_pageControl) {  _pageControl = [[UIPageControl alloc]initWithFrame:CGRectMake(ScreenWidth/self.images.count, ScreenHeight * 15/16.0, ScreenWidth/2, ScreenHeight/16.0)];  //设置总页数  _pageControl.numberOfPages = self.images.count;  //设置分页指示器颜色  _pageControl.pageIndicatorTintColor = [UIColor blueColor];  //设置当前指示器颜色  _pageControl.currentPageIndicatorTintColor = [UIColor redColor];  _pageControl.enabled = NO; } return _pageControl;}#pragma mark UIScrollViewDelegate-(void)scrollViewDidScroll:(UIScrollView *)scrollView{ self.pageControl.currentPage = (NSInteger)self.mainScrollV.contentOffset.x/ScreenWidth;}@end

//// LoginViewController.m// 指纹验证//// Created by hj on 2018/1/31.// Copyright © 2018年 hj. All rights reserved.//#import "LoginViewController.h"#import "LocalAuthentication/LocalAuthentication.h"@interface LoginViewController ()@end@implementation LoginViewController- (void)viewDidLoad { [super viewDidLoad]; if ([UIDevice currentDevice].systemVersion.floatValue < 8.0) {//8.0以后才支持指纹  return; }  UIButton * btn = [UIButton buttonWithType:UIButtonTypeCustom]; btn.frame = CGRectMake(0, 0, 160, 50); btn.center = self.view.center; [btn setTitle:@"点击一下,指纹登录" forState:0]; [btn setTitleColor:[UIColor redColor] forState:0]; btn.backgroundColor = [UIColor yellowColor]; btn.layer.borderColor = [UIColor orangeColor].CGColor; btn.layer.borderWidth = 2; btn.layer.cornerRadius = 20; [btn addTarget:self action:@selector(btnClick) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:btn];}- (void)btnClick{ [self fingerprintVerification];}- (void)fingerprintVerification{ //创建LAContext LAContext* context = [[LAContext alloc] init]; NSError* error = nil; if ([context canEvaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics error:&error]) {  //支持指纹验证  [context evaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics localizedReason:@"请验证已有指纹" reply:^(BOOL success, NSError *error) {   if (success) {    //验证成功，主线程处理UI    NSLog(@"成功啦");        //用户选择输入密码，切换主线程处理    dispatch_async(dispatch_get_main_queue(), ^{     [self showMessage:@"指纹登录成功!"];    });   }   else   {    NSLog(@"%@",error.localizedDescription);    switch (error.code) {     case LAErrorSystemCancel:     {       [self showMessage:@"系统取消授权，如其他APP切入"];      //系统取消授权，如其他APP切入      break;     }     case LAErrorUserCancel:     {      //用户取消验证Touch ID      [self showMessage:@"用户取消验证Touch ID"];      break;     }     case LAErrorAuthenticationFailed:     {      //授权失败      [self showMessage:@"授权失败"];      break;     }     case LAErrorPasscodeNotSet:     {      //系统未设置密码      [self showMessage:@"系统未设置密码"];      break;     }     case LAErrorBiometryNotAvailable:     {      //设备Touch ID不可用，例如未打开      [self showMessage:@"设备Touch ID不可用，例如未打开"];      break;     }     case LAErrorBiometryNotEnrolled:     {      //设备Touch ID不可用，用户未录入      [self showMessage:@"设备Touch ID不可用，用户未录入"];      break;     }     case LAErrorUserFallback:     {      [[NSOperationQueue mainQueue] addOperationWithBlock:^{       //用户选择输入密码，切换主线程处理       [self showMessage:@"用户选择输入密码，切换主线程处理"];             }];      break;     }     default:     {      [[NSOperationQueue mainQueue] addOperationWithBlock:^{       //其他情况，切换主线程处理       [self showMessage:@"其他情况，切换主线程处理"];      }];      break;     }    }   }  }]; } else {  //不支持指纹识别，LOG出错误详情  NSLog(@"不支持指纹识别");  switch (error.code) {   case LAErrorBiometryNotEnrolled:   {    NSLog(@"TouchID is not enrolled");    [self showMessage:@"TouchID is not enrolled"];    break;   }   case LAErrorPasscodeNotSet:   {    NSLog(@"A passcode has not been set");    [self showMessage:@"A passcode has not been set"];    break;   }   default:   {    NSLog(@"TouchID not available");    [self showMessage:@"TouchID not available"];    break;   }  }    NSLog(@"error : %@",error.localizedDescription); }}-(void)showMessage:(NSString *)msg{ UIAlertView * alert = [[UIAlertView alloc]initWithTitle:@"提示" message:msg delegate:nil cancelButtonTitle:@"取消" otherButtonTitles:@"确定", nil]; [alert show];}@end