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
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#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
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//// 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
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//// 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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原文链接：https://www.jianshu.com/p/b28fc638c92f
