iOS实现启动引导页与指纹解锁的方法详解

前言

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!

效果图:

引导页及指纹识别效果图1

引导页及指纹识别效果图2

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 ()<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

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

总结

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