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iOS启动引导页及指纹解锁

2018-01-31 18:50 编辑: 四门三连 分类:澳门银河在线 来源:Lovely_Juanjuan

一.思路

应用程序启动时有些会有引导页,目的是用户第一次登录时对应用程序的一些简单了解介绍,一般就是几张轮播图片,当引用程序第一次进入时会跳到引导页,以后不再显示,这时就需要将不是第一次登录的标致flag保存到内存中,推荐用户偏好设置NSUserDefaults,第一直接去取值取这个flag取不到(因为是第一次登录)就跳引导页,然后在引导页进入登录页或者首页时将flag值保存到偏好设置中,以后再进来就可以取到不是第一登录的flag就直接跳过引导页.方式有两种:一种是直接切换UIWindow的根控制器本文是第一种,另一种是模态弹出,根据具体需求决定!以下直接上代码:

AppDelegate文件中

#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;
}

引导页控制器:GuidePagesViewController

//
//  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 ()
@property(nonatomic ,strong) UIScrollView * mainScrollV;
@property(nonatomic ,strong) UIPageControl * pageControl;
@property(nonatomic ,strong) NSMutableArray * images;
@end
@implementation GuidePagesViewController
- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor redColor];
    [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"];
        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/self.images.count, 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.backgroundColor = [UIColor yellowColor];
        _pageControl.enabled = NO;
    }
    return _pageControl;
}
#pragma mark UIScrollViewDelegate
-(void)scrollViewDidScroll:(UIScrollView *)scrollView{
    self.pageControl.currentPage = (NSInteger)self.mainScrollV.contentOffset.x/ScreenWidth;
}
@end

指纹解锁很简单,导入头文件#import "LocalAuthentication/LocalAuthentication.h",验证手机系统是否支持指纹解锁 iOS 8以后才行,验证本手机是否开启了指纹识别,是否录入了指纹等

指纹登录验证:LoginViewController

//
//  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
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