添加指纹识别功能

iPhone 5S开始硬件支持指纹识别功能，在iOS 8以后支持指纹识别，今天随意试了试指纹识别功能的识别，写了一个小demo

1.环境

引入头文件

#import <LocalAuthentication/LocalAuthentication.h>

　　

2.创建两个页面

第一个页面添加一个button，用来触发指纹识别的功能

第二个页面就加个label//

//  ViewController.m
//  FingerPrint
//
//  Created by Silence on 16/1/22.
//  Copyright (c) 2016年 Silence. All rights reserved.
//

#import "ViewController.h"
#import "SecondViewController.h"
#import <LocalAuthentication/LocalAuthentication.h>
@interface ViewController ()
{
LAContext * _context;
}
@end

@implementation ViewController

- (void)viewDidLoad {
[super viewDidLoad];

// Do any additional setup after loading the view, typically from a nib.
}

- (IBAction)buttonDidClick:(id)sender {

_context = [[LAContext alloc]init];

BOOL isSupport = [_context canEvaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics error:nil];

if ([UIDevice currentDevice].systemVersion.floatValue < 8.0) {
UIAlertController * alert = [UIAlertController alertControllerWithTitle:@"提示" message:@"当前系统版本不支持指纹识别" preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction * action = [UIAlertAction actionWithTitle:@"提示" style:UIAlertActionStyleDefault handler:nil];
[alert addAction:action];
[self presentViewController:alert animated:YES completion:nil];
}else if (!isSupport){
UIAlertController * alert = [UIAlertController alertControllerWithTitle:@"提示" message:@"当前设备不支持指纹识别" preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction * action = [UIAlertAction actionWithTitle:@"提示" style:UIAlertActionStyleDefault handler:nil];
[alert addAction:action];
[self presentViewController:alert animated:YES completion:nil];
}else{
[_context evaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics localizedReason:@"请按手印" reply:^(BOOL success, NSError *error) {
if(success)
{
　　　　　　　　　　//这部分处理验证成功的逻辑
SecondViewController * se = [[SecondViewController alloc]init];
[self presentViewController:se animated:YES completion:nil];
　　　　　　　　　　　　
}
}];

}

}

- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

@end

　　

指纹识别功能的初步集成还是比较简单的。