指紋驗(yàn)證這個(gè)功能現(xiàn)在在一些app中經(jīng)常常見，常常與數(shù)字解鎖，手勢解鎖聯(lián)合起來使用。前幾天接到說實(shí)現(xiàn)一個(gè)指紋驗(yàn)證的功能，搗鼓了挺久，然后今天，我就簡單的介紹下指紋驗(yàn)證，會(huì)做個(gè)簡單的demo實(shí)現(xiàn)一下基本的功能。
支持系統(tǒng)和機(jī)型：ios系統(tǒng)的指紋識(shí)別功能最低支持的機(jī)型為iphone 5s，最低支持系統(tǒng)為ios 8。實(shí)現(xiàn)起來呢，其實(shí)還是很簡單的，下面我們就用純代碼方式實(shí)現(xiàn)一個(gè)簡單的demo1。
第一部分：調(diào)用原生服務(wù)實(shí)現(xiàn)指紋驗(yàn)證
這部分了解個(gè)大概就可以了
第一步：添加localauthentication.framework庫
第二步：在appdelegate.m中添加代碼
這個(gè)不說其實(shí)大家也都知道的吧。
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#import "appdelegate.h"#import "viewcontroller.h"@interface appdelegate ()@end@implementation appdelegate- (bool)application:(uiapplication *)application didfinishlaunchingwithoptions:(nsdictionary *)launchoptions { //appdelegate _window = [[uiwindow alloc]initwithframe:[uiscreen mainscreen].bounds]; _window.backgroundcolor = [uicolor whitecolor]; [_window makekeyandvisible]; viewcontroller *vc = [[viewcontroller alloc]init]; uinavigationcontroller *na = [[uinavigationcontroller alloc]initwithrootviewcontroller:vc]; _window.rootviewcontroller = na; return yes;} |
第三步
引入頭文件
#import <localauthentication/localauthentication.h>
第四步：實(shí)現(xiàn)指紋驗(yàn)證
這一步就是很重要的地方了，在- (void)viewdidload中寫入驗(yàn)證實(shí)現(xiàn)的代碼，這里只有兩步，因?yàn)閘acontext在官方文檔中只有兩個(gè)方法:
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-canevaluatepolicy:error: //-(bool)canevaluatepolicy:(lapolicy)policy error:(nserror * __autoreleasing *)error __attribute__((swift_error(none))); -evaluatepolicy:localizedreason:reply: //- (void)evaluatepolicy:(lapolicy)policy localizedreason:(nsstring *)localizedreason reply:(void(^)(bool success, nserror * __nullable error))reply; |
一個(gè)是判斷設(shè)備是否支持touchid，一個(gè)是進(jìn)行驗(yàn)證返回不同的結(jié)果，之前在網(wǎng)上經(jīng)常可以一些文章中寫了，指紋驗(yàn)證的第一步都是先判斷設(shè)備的系統(tǒng)版本等等，現(xiàn)在似乎都不需要了，只要調(diào)用該方法就可以了。全部的代碼 如下：
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- (void)viewdidload { [super viewdidload]; self.title = @"touchidsimpledemoone"; lacontext *context = [[lacontext alloc]init]; nserror *error; nsstring *result = @"需要你身份驗(yàn)證呢"; if ([context canevaluatepolicy:lapolicydeviceownerauthenticationwithbiometrics error:&error]) { [context evaluatepolicy:lapolicydeviceownerauthenticationwithbiometrics localizedreason:result reply:^(bool success, nserror *error) { if (success) { //驗(yàn)證成功，主線程處理ui //這個(gè)地方呢就是寫一些驗(yàn)證成功之后需要做些什么事情的代碼。 nslog(@"驗(yàn)證成功"); } else { //以下是一些驗(yàn)證失敗的原因啥的 nslog(@"%@",error.localizeddescription); switch (error.code) { case laerrorsystemcancel: { nslog(@"切換到其他app，系統(tǒng)取消驗(yàn)證touch id"); //切換到其他app，系統(tǒng)取消驗(yàn)證touch id break; } case laerrorusercancel: { nslog(@"用戶取消驗(yàn)證touch id"); //用戶取消驗(yàn)證touch id break; } case laerroruserfallback: { nslog(@"用戶選擇輸入密碼"); [[nsoperationqueue mainqueue] addoperationwithblock:^{ //用戶選擇其他驗(yàn)證方式，切換主線程處理 }]; break; } default: { nslog(@"laerrorauthenticationfailed，授權(quán)失敗"); //授權(quán)失敗 [[nsoperationqueue mainqueue] addoperationwithblock:^{ //其他情況，切換主線程處理 }]; break; } } } }]; }else { //不支持指紋識(shí)別，log出錯(cuò)誤詳情 switch (error.code) { case laerrortouchidnotenrolled: { nslog(@"設(shè)備touch id不可用，用戶未錄入"); break; } case laerrorpasscodenotset: { nslog(@"系統(tǒng)未設(shè)置密碼"); break; } case laerrortouchidnotavailable: { nslog(@"設(shè)備touch id不可用，例如未打開"); break; } default: { nslog(@"系統(tǒng)未設(shè)置密碼"); break; } } nslog(@"%@",error.localizeddescription); } } |
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//指紋驗(yàn)證返回值typedef ns_enum(nsinteger, laerror){ /// authentication was not successful, because user failed to provide valid credentials. laerrorauthenticationfailed = klaerrorauthenticationfailed, /// authentication was canceled by user (e.g. tapped cancel button). laerrorusercancel = klaerrorusercancel, /// authentication was canceled, because the user tapped the fallback button (enter password). laerroruserfallback = klaerroruserfallback, /// authentication was canceled by system (e.g. another application went to foreground). laerrorsystemcancel = klaerrorsystemcancel, /// authentication could not start, because passcode is not set on the device. laerrorpasscodenotset = klaerrorpasscodenotset, /// authentication could not start, because touch id is not available on the device. laerrortouchidnotavailable = klaerrortouchidnotavailable, /// authentication could not start, because touch id has no enrolled fingers. laerrortouchidnotenrolled = klaerrortouchidnotenrolled, /// authentication was not successful, because there were too many failed touch id attempts and /// touch id is now locked. passcode is required to unlock touch id, e.g. evaluating /// lapolicydeviceownerauthenticationwithbiometrics will ask for passcode as a prerequisite. laerrortouchidlockout ns_enum_available(10_11, 9_0) = klaerrortouchidlockout, /// authentication was canceled by application (e.g. invalidate was called while /// authentication was in progress). laerrorappcancel ns_enum_available(10_11, 9_0) = klaerrorappcancel, /// lacontext passed to this call has been previously invalidated. laerrorinvalidcontext ns_enum_available(10_11, 9_0) = klaerrorinvalidcontext} ns_enum_available(10_10, 8_0); |
以上呢，就是一個(gè)簡單的demo了，可能有些小問題，到時(shí)候需要的話可以自調(diào)整。這里附上這個(gè)demo的guithub鏈接看這里看這里，鏈接在這呢。
第二部分：利用現(xiàn)有的第三方組件實(shí)現(xiàn)
這個(gè)部分可以好好學(xué)習(xí)一下。
在這里呢，我要推薦一個(gè)別人寫的一個(gè)第三方的組件，就是[wjtouchid](https://github.com/hu670014125/wjtouchid);這個(gè)控件的話，在這個(gè)鏈接上其實(shí)已經(jīng)有寫出怎么用了，其實(shí)不需要我再都說什么，但是我還是要說下吧。
調(diào)用時(shí)只需要一兩行代碼調(diào)用，但是回調(diào)函數(shù)還是需要寫不少東西的。
1:復(fù)制文件進(jìn)去
2:引入頭文件
#import "wjtouchid.h"
3:遵守協(xié)議
@interface viewcontroller ()<wjtouchiddelegate>
4: 創(chuàng)建對象
@property (nonatomic, strong) wjtouchid *touchid;
5:調(diào)用
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- (void)viewdidload { [super viewdidload]; //初始化 wjtouchid *touchid = [[wjtouchid alloc]init]; [touchid startwjtouchidwithmessage:wjnotice(@"自定義信息", @"the custom message") fallbacktitle:wjnotice(@"", @"fallback title") delegate:self]; self.touchid = touchid;} |
6:實(shí)現(xiàn)回調(diào)函數(shù)
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@required //touchid驗(yàn)證成功- (void)wjtouchidauthorizesuccess; //touchid驗(yàn)證失敗- (void)wjtouchidauthorizefailure;@optional //當(dāng)前設(shè)備不支持指紋識(shí)別- (void)wjtouchidisnotsupport; //當(dāng)前軟件被掛起取消了授權(quán)(如突然來了電話,應(yīng)用進(jìn)入前臺(tái))- (void)wjtouchidauthorizeerrorappcancel; //取消touchid驗(yàn)證 (用戶點(diǎn)擊了取消)- (void)wjtouchidauthorizeerrorusercancel; //在touchid對話框中點(diǎn)擊輸入密碼按鈕- (void)wjtouchidauthorizeerroruserfallback; //在驗(yàn)證的touchid的過程中被系統(tǒng)取消 例如突然來電話、按了home鍵、鎖屏...- (void)wjtouchidauthorizeerrorsystemcancel; //無法啟用touchid,設(shè)備沒有設(shè)置密碼- (void)wjtouchidauthorizeerrorpasscodenotset; //多次連續(xù)使用touch id失敗，touch id被鎖，需要用戶輸入密碼解鎖- (void)wjtouchidauthorizeerrortouchidlockout; //當(dāng)前軟件被掛起取消了授權(quán) (授權(quán)過程中,lacontext對象被釋)- (void)wjtouchidauthorizeerrorinvalidcontext; //設(shè)備沒有錄入touchid,無法啟用touchid- (void)wjtouchidauthorizeerrortouchidnotenrolled; //該設(shè)備的touchid無效- (void)wjtouchidauthorizeerrortouchidnotavailable; |
這些方法實(shí)現(xiàn)結(jié)束后呢，這個(gè)功能也基本上算是完成了。因?yàn)楹孟衿L了，看得人肯定也嫌煩，所以我準(zhǔn)備另寫一篇做一個(gè)在app被喚醒的時(shí)候啟動(dòng)指紋驗(yàn)證，分別用彈出控制器和彈出自定義view這兩個(gè)方式來實(shí)現(xiàn)，感興趣的話可以看下。
以上就是本文的全部內(nèi)容，希望對大家的學(xué)習(xí)有所幫助，也希望大家多多支持服務(wù)器之家。
