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;
}
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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
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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
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总结
以上就是这篇文章的全部内容了，希望本文的内容对大家的学习或者工作具有一定的参考学习价值，如果有疑问大家可以留言交流，谢谢大家对服务器之家的支持。
原文链接：https://www.jianshu.com/p/b28fc638c92f