iOS指纹解锁，几行代码解决，特简单

来源：互联网发布：矩阵行列式计算器编辑：程序博客网时间：2024/06/06 02:08

没什么好说的，iOS8.0以后才推出的
先判断一下系统版本，在判断一下当前设备是否支持指纹解锁
LocalAuthentication.framework 有一整套的交互，指纹不行输入密码之类的，都封装好了，不用开发者去操心

引入依赖框架 LocalAuthentication.framework

#import "ViewController.h"#import <LocalAuthentication/LocalAuthentication.h>@interface ViewController ()<UIWebViewDelegate>@property (nonatomic, strong) UIWebView *webview;@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];    //iOS8.0后才支持指纹识别接口    if ([UIDevice currentDevice].systemVersion.floatValue < 8.0) {        return;    }    _webview = [[UIWebView alloc]initWithFrame:CGRectMake(0, 0, 300, 400)];    _webview.delegate = self;    [self.view addSubview:_webview];    [self createLa];}-(void)webViewDidStartLoad:(UIWebView *)webView{    NSLog(@"开始了");}-(void)webViewDidFinishLoad:(UIWebView *)webView{    NSLog(@"结束了");}-(void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error{    NSLog(@"失败了 %@",error);}- (void)createLa{    //创建LAContext    LAContext* context = [[LAContext alloc] init];    NSError* error = nil;    NSString* result = @"请验证已有指纹";    //首先使用canEvaluatePolicy 判断设备支持状态    if ([context canEvaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics error:&error]) {        //支持指纹验证        [context evaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics localizedReason:result 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(), ^{                    [_webview loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"https://www.baidu.com"]]];                    NSLog(@"刷新啦");                });            }            else            {                NSLog(@"%@",error.localizedDescription);                switch (error.code) {                    case LAErrorSystemCancel:                    {                        //系统取消授权，如其他APP切入                        break;                    }                    case LAErrorUserCancel:                    {                        //用户取消验证Touch ID                        break;                    }                    case LAErrorAuthenticationFailed:                    {                        //授权失败                        break;                    }                    case LAErrorPasscodeNotSet:                    {                        //系统未设置密码                        break;                    }                    case LAErrorTouchIDNotAvailable:                    {                        //设备Touch ID不可用，例如未打开                        break;                    }                    case LAErrorTouchIDNotEnrolled:                    {                        //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                        }];                        break;                    }                    default:                    {                        [[NSOperationQueue mainQueue] addOperationWithBlock:^{                            //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 LAErrorTouchIDNotEnrolled:            {                NSLog(@"TouchID is not enrolled");                break;            }            case LAErrorPasscodeNotSet:            {                NSLog(@"A passcode has not been set");                break;            }            default:            {                NSLog(@"TouchID not available");                break;            }        }        NSLog(@"%@",error.localizedDescription);    }}

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