前言
應用程序啟動時有些會有引導頁,目的是用戶第一次登錄時對應用程序的一些簡單了解介紹,一般就是幾張輪播圖片,當引用程序第一次進入時會跳到引導頁,以后不再顯示,這時就需要將不是第一次登錄的標致flag保存到內存中,推薦用戶偏好設置nsuserdefaults,第一直接去取值取這個flag取不到(因為是第一次登錄)就跳引導頁,然后在引導頁進入登錄頁或者首頁時將flag值保存到偏好設置中,以后再進來就可以取到不是第一登錄的flag就直接跳過引導頁.方式有兩種:一種是直接切換uiwindow的根控制器本文是第一種,另一種是模態彈出,根據具體需求決定!
效果圖:
引導頁及指紋識別效果圖1
引導頁及指紋識別效果圖2
以下直接上代碼:
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"]) {//如果用戶是第一次登錄 self.window.rootviewcontroller = [[guidepagesviewcontroller alloc]init]; }else{//否則直接進入登錄頁面 self.window.rootviewcontroller = [[loginviewcontroller alloc]init]; } [self.window makekeyandvisible]; return yes;} |
引導頁控制器:guidepagesviewcontroller
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//// guidepagesviewcontroller.m// 登錄引導頁開發//// 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){//最后一張圖片時添加點擊進入按鈕 imagev.userinteractionenabled = yes; uibutton * btn = [uibutton buttonwithtype:uibuttontypecustom]; btn.frame = cgrectmake(screenwidth * 0.5 - 80, screenheight * 0.7, 160, 40); [btn settitle:@"點擊一下,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]; } }}//點擊按鈕保存第一次登錄的標記到本地并且跳入登錄界面- (void)btnclick{ //保存標記到本地 nsuserdefaults * userdef = [nsuserdefaults standarduserdefaults]; [userdef setbool:yes forkey:@"isnotfirst"]; [userdef synchronize]; //切換視圖控制器 [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)]; //設置總頁數 _pagecontrol.numberofpages = self.images.count; //設置分頁指示器顏色 _pagecontrol.pageindicatortintcolor = [uicolor bluecolor]; //設置當前指示器顏色 _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 |
指紋解鎖很簡單,導入頭文件#import "localauthentication/localauthentication.h",驗證手機系統是否支持指紋解鎖 ios 8以后才行,驗證本手機是否開啟了指紋識別,是否錄入了指紋等
指紋登錄驗證:loginviewcontroller
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//// loginviewcontroller.m// 指紋驗證//// 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以后才支持指紋 return; } uibutton * btn = [uibutton buttonwithtype:uibuttontypecustom]; btn.frame = cgrectmake(0, 0, 160, 50); btn.center = self.view.center; [btn settitle:@"點擊一下,指紋登錄" 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{ //創建lacontext lacontext* context = [[lacontext alloc] init]; nserror* error = nil; if ([context canevaluatepolicy:lapolicydeviceownerauthenticationwithbiometrics error:&error]) { //支持指紋驗證 [context evaluatepolicy:lapolicydeviceownerauthenticationwithbiometrics localizedreason:@"請驗證已有指紋" reply:^(bool success, nserror *error) { if (success) { //驗證成功，主線程處理ui nslog(@"成功啦"); //用戶選擇輸入密碼，切換主線程處理 dispatch_async(dispatch_get_main_queue(), ^{ [self showmessage:@"指紋登錄成功!"]; }); } else { nslog(@"%@",error.localizeddescription); switch (error.code) { case laerrorsystemcancel: { [self showmessage:@"系統取消授權，如其他app切入"]; //系統取消授權，如其他app切入 break; } case laerrorusercancel: { //用戶取消驗證touch id [self showmessage:@"用戶取消驗證touch id"]; break; } case laerrorauthenticationfailed: { //授權失敗 [self showmessage:@"授權失敗"]; break; } case laerrorpasscodenotset: { //系統未設置密碼 [self showmessage:@"系統未設置密碼"]; break; } case laerrorbiometrynotavailable: { //設備touch id不可用，例如未打開 [self showmessage:@"設備touch id不可用，例如未打開"]; break; } case laerrorbiometrynotenrolled: { //設備touch id不可用，用戶未錄入 [self showmessage:@"設備touch id不可用，用戶未錄入"]; break; } case laerroruserfallback: { [[nsoperationqueue mainqueue] addoperationwithblock:^{ //用戶選擇輸入密碼，切換主線程處理 [self showmessage:@"用戶選擇輸入密碼，切換主線程處理"]; }]; break; } default: { [[nsoperationqueue mainqueue] addoperationwithblock:^{ //其他情況，切換主線程處理 [self showmessage:@"其他情況，切換主線程處理"]; }]; break; } } } }]; } else { //不支持指紋識別，log出錯誤詳情 nslog(@"不支持指紋識別"); 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:@"確定", nil]; [alert show];}@end |
總結
以上就是這篇文章的全部內容了，希望本文的內容對大家的學習或者工作具有一定的參考學習價值，如果有疑問大家可以留言交流，謝謝大家對服務器之家的支持。
原文鏈接：https://www.jianshu.com/p/b28fc638c92f
