#import <LocalAuthentication/LocalAuthentication.h>
//指纹识别的操作
-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
//1. 判断系统版本
if ([UIDevice currentDevice].systemVersion.floatValue >= 8.0) {
//2. LAContext : 本地验证对象上下文
LAContext *context = [LAContext new];
//3. 判断是否可用
//Evaluate: 评估 Policy: 策略,方针
//LAPolicyDeviceOwnerAuthenticationWithBiometrics: 允许设备拥有者使用生物识别技术
if (![context canEvaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics error:nil]) {
dispatch_async(dispatch_get_main_queue(), ^{
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"对不起, 指纹识别技术暂时不可用" message:nil delegate:nil cancelButtonTitle:@"确定" otherButtonTitles: nil];
[alertView show];
});
}
//4. 开始使用指纹识别
//localizedReason: 指纹识别出现时的提示文字, 一般填写为什么使用指纹识别
[context evaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics localizedReason:@"开启了指纹识别, 将打开隐藏功能" reply:^(BOOL success, NSError * _Nullable error) {
if (success) {
NSLog(@"指纹识别成功");
// 指纹识别成功，回主线程更新UI,弹出提示框
dispatch_async(dispatch_get_main_queue(), ^{
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"指纹识别成功" message:nil delegate:nil cancelButtonTitle:@"确定" otherButtonTitles: nil];
[alertView show];
});
}
if (error) {
// 错误的判断chuli
if (error.code == -2) {
// 取消操作，回主线程更新UI,弹出提示框
dispatch_async(dispatch_get_main_queue(), ^{
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"用户取消了操作" message:nil delegate:nil cancelButtonTitle:@"确定" otherButtonTitles: nil];
[alertView show];
});
} else {
NSLog(@"错误: %@",error);
// 指纹识别出现错误，回主线程更新UI,弹出提示框
dispatch_async(dispatch_get_main_queue(), ^{
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:nil message:@"指纹验证失败" delegate:nil cancelButtonTitle:@"确定" otherButtonTitles: nil];
[alertView show];
});
}
}
}];
} else {
dispatch_async(dispatch_get_main_queue(), ^{
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"对不起, 该手机不支持指纹识别" message:nil delegate:nil cancelButtonTitle:@"确定" otherButtonTitles: nil];
[alertView show];
});
}
}
网友评论