這篇文章給大家分享的是有關iOS指紋驗證TouchID怎么用的內容。小編覺得挺實用的,因此分享給大家做個參考,一起跟隨小編過來看看吧。
第一部分:調用原生服務實現指紋驗證
這部分了解個大概就可以了
第一步:添加LocalAuthentication.framework庫



第二步:在appdelegate.m中添加代碼
這個不說其實大家也都知道的吧。
#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:實現指紋驗證
這一步就是很重要的地方了,在- (void)viewDidLoad中寫入驗證實現的代碼,這里只有兩步,因為LAContext在官方文檔中只有兩個方法:
-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;
一個是判斷設備是否支持touchid,一個是進行驗證返回不同的結果,之前在網上經??梢砸恍┪恼轮袑懥?,指紋驗證的第一步都是先判斷設備的系統版本等等,現在似乎都不需要了,只要調用該方法就可以了。全部的代碼 如下:
- (void)viewDidLoad {
[super viewDidLoad];
self.title = @"TouchIDSimpleDemoOne";
LAContext *context = [[LAContext alloc]init];
NSError *error;
NSString *result = @"需要你身份驗證呢";
if ([context canEvaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics error:&error])
{
[context evaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics localizedReason:result reply:^(BOOL success, NSError *error)
{
if (success)
{
//驗證成功,主線程處理UI
//這個地方呢就是寫一些驗證成功之后需要做些什么事情的代碼。
NSLog(@"驗證成功");
}
else
{
//以下是一些驗證失敗的原因啥的
NSLog(@"%@",error.localizedDescription);
switch (error.code) {
case LAErrorSystemCancel:
{
NSLog(@"切換到其他APP,系統取消驗證Touch ID");
//切換到其他APP,系統取消驗證Touch ID
break;
}
case LAErrorUserCancel:
{
NSLog(@"用戶取消驗證Touch ID");
//用戶取消驗證Touch ID
break;
}
case LAErrorUserFallback:
{
NSLog(@"用戶選擇輸入密碼");
[[NSOperationQueue mainQueue] addOperationWithBlock:^{
//用戶選擇其他驗證方式,切換主線程處理
}];
break;
}
default:
{
NSLog(@"LAErrorAuthenticationFailed,授權失敗");
//授權失敗
[[NSOperationQueue mainQueue] addOperationWithBlock:^{
//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
switch (error.code) {
case LAErrorTouchIDNotEnrolled:
{
NSLog(@"設備Touch ID不可用,用戶未錄入");
break;
}
case LAErrorPasscodeNotSet:
{
NSLog(@"系統未設置密碼");
break;
}
case LAErrorTouchIDNotAvailable:
{
NSLog(@"設備Touch ID不可用,例如未打開");
break;
}
default:
{
NSLog(@"系統未設置密碼");
break;
}
}
NSLog(@"%@",error.localizedDescription);
}
}//指紋驗證返回值
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,就是一個簡單的demo了,可能有些小問題,到時候需要的話可以自調整。這里附上這個demo的guithub鏈接看這里看這里,鏈接在這呢。
第二部分:利用現有的第三方組件實現
這個部分可以好好學習一下。
在這里呢,我要推薦一個別人寫的一個第三方的組件,就是[WJTouchID](https://github.com/hu670014125/WJTouchID);這個控件的話,在這個鏈接上其實已經有寫出怎么用了,其實不需要我再都說什么,但是我還是要說下吧。
調用時只需要一兩行代碼調用,但是回調函數還是需要寫不少東西的。
1:復制文件進去

2:引入頭文件
#import "WJTouchID.h"
3:遵守協議
@interface ViewController ()<WJTouchIDDelegate>
4: 創建對象
@property (nonatomic, strong) WJTouchID *touchID;
5:調用
- (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:實現回調函數
@required //TouchID驗證成功 - (void)WJTouchIDAuthorizeSuccess; //TouchID驗證失敗 - (void)WJTouchIDAuthorizeFailure; @optional //當前設備不支持指紋識別 - (void)WJTouchIDIsNotSupport; //當前軟件被掛起取消了授權(如突然來了電話,應用進入前臺) - (void)WJTouchIDAuthorizeErrorAppCancel; //取消TouchID驗證 (用戶點擊了取消) - (void)WJTouchIDAuthorizeErrorUserCancel; //在TouchID對話框中點擊輸入密碼按鈕 - (void)WJTouchIDAuthorizeErrorUserFallback; //在驗證的TouchID的過程中被系統取消 例如突然來電話、按了Home鍵、鎖屏... - (void)WJTouchIDAuthorizeErrorSystemCancel; //無法啟用TouchID,設備沒有設置密碼 - (void)WJTouchIDAuthorizeErrorPasscodeNotSet; //多次連續使用Touch ID失敗,Touch ID被鎖,需要用戶輸入密碼解鎖 - (void)WJTouchIDAuthorizeErrorTouchIDLockout; //當前軟件被掛起取消了授權 (授權過程中,LAContext對象被釋) - (void)WJTouchIDAuthorizeErrorInvalidContext; //設備沒有錄入TouchID,無法啟用TouchID - (void)WJTouchIDAuthorizeErrorTouchIDNotEnrolled; //該設備的TouchID無效 - (void)WJTouchIDAuthorizeErrorTouchIDNotAvailable;
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