通过LAContext的使用，调用系统指纹解锁功能来实现APP的解锁。
代码封装
接口文件.h
#import <Foundation/Foundation.h>
@interface AuthenManager : NSObject
- (void)authen:(void (^)(void))start complete:(void (^)(BOOL success, NSInteger errorCode))complete;
@end
实现文件.m
#import "AuthenManager.h"
// 指纹解锁必须的头文件
#import <LocalAuthentication/LocalAuthentication.h>
@interface AuthenManager ()
@property (nonatomic, strong) LAContext *context;
@end
@implementation AuthenManager
- (void)authen:(void (^)(void))start complete:(void (^)(BOOL success, NSInteger errorCode))complete
{
// 开始回调
if (start) {
start();
}
// 判断设备是否支持指纹识别
NSError *error = nil;
BOOL isValidTouch = [self.context canEvaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics error:&error];
if (isValidTouch)
{
NSLog(@"支持指纹识别");
[self.context evaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics localizedReason:@"请按home键指纹解锁" reply:^(BOOL success, NSError * _Nullable error) {
if (success)
{
NSLog(@"验证成功 刷新主界面");
}
else
{
NSLog(@"%@", error.localizedDescription);
switch (error.code)
{
case LAErrorSystemCancel:
{
NSLog(@"系统取消授权，如其他APP切入");
break;
}
case LAErrorUserCancel:
{
NSLog(@"用户取消验证Touch ID");
break;
}
case LAErrorAuthenticationFailed:
{
NSLog(@"授权失败");
break;
}
case LAErrorPasscodeNotSet:
{
NSLog(@"系统未设置密码");
break;
}
case LAErrorTouchIDNotAvailable:
{
NSLog(@"设备Touch ID不可用，例如未打开");
break;
}
case LAErrorTouchIDNotEnrolled:
{
NSLog(@"设备Touch ID不可用，用户未录入");
break;
}
case LAErrorUserFallback:
{
[[NSOperationQueue mainQueue] addOperationWithBlock:^{
NSLog(@"用户选择输入密码，切换主线程处理");
}];
break;
}
default:
{
[[NSOperationQueue mainQueue] addOperationWithBlock:^{
NSLog(@"其他情况，切换主线程处理");
}];
break;
}
}
}
// 成功回调
if (complete) {
complete(success, error.code);
}
}];
}
else
{
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);
// 失败回调
if (complete) {
complete(NO, error.code);
}
}
}
- (LAContext *)context
{
if (_context == nil) {
// 创建LAContext
_context = [LAContext new];
// 这个设置的使用密码的字体，当text=@""时，按钮将被隐藏，也设置指纹输入失败之后的弹出框的选项
_context.localizedFallbackTitle = @"密码解锁";
// 这个设置的取消按钮的字体
_context.localizedCancelTitle = @"取消";
}
return _context;
}
@end
封装类使用
#import "ViewController.h"
// 导入封装类头文件
#import "AuthenManager.h"
@interface ViewController ()
@property (nonatomic, strong) AuthenManager *authenManager;
@property (nonatomic, strong) UILabel *authenLabel;
@property (nonatomic, strong) NSString *message;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.navigationItem.title = @"指纹解锁";
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"authen" style:UIBarButtonItemStyleDone target:self action:@selector(authenClick)];
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"alert" style:UIBarButtonItemStyleDone target:self action:@selector(alertClick)];
self.authenLabel = [[UILabel alloc] initWithFrame:CGRectMake(10.0, 10.0, (self.view.frame.size.width - 10.0 * 2), 40.0)];
[self.view addSubview:self.authenLabel];
self.authenLabel.backgroundColor = [UIColor colorWithWhite:0.5 alpha:0.2];
self.authenLabel.textAlignment = NSTextAlignmentCenter;
self.authenLabel.text = @"等待解锁~";
//
self.message = @"请先进行指纹解锁！";
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)authenClick
{
if (self.authenManager == nil) {
self.authenManager = [[AuthenManager alloc] init];
}
ViewController __weak *weakSelf = self;
[self.authenManager authen:^{
weakSelf.navigationItem.leftBarButtonItem.enabled = NO;
weakSelf.navigationItem.rightBarButtonItem.enabled = NO;
weakSelf.authenLabel.text = @"正在进行【指纹】解锁……";
} complete:^(BOOL success, NSInteger errorCode) {
weakSelf.navigationItem.leftBarButtonItem.enabled = YES;
weakSelf.navigationItem.rightBarButtonItem.enabled = YES;
if (success) {
weakSelf.authenLabel.text = @"【指纹】解锁成功！";
weakSelf.message = @"已经进行指纹解锁！可以进行一下步操作了~";
} else {
weakSelf.authenLabel.text = @"【指纹】解锁失败！";
weakSelf.message = @"【指纹】解锁失败！";
}
}];
}
- (void)alertClick
{
[[[UIAlertView alloc] initWithTitle:nil message:self.message delegate:nil cancelButtonTitle:nil otherButtonTitles:@"知道了", nil] show];
}
@end
