iOS8之后苹果发布了指纹识别的功能，通过touch ID来识别用户，做用户授权，主要是依赖于LocalAuthentication库
指纹识别：一判断设备是否支持指纹识别功能
二识别指纹，成功后做相应的动作，失败后提醒用户指纹识别失败
先引入#import <LocalAuthentication/LocalAuthentication.h>
LAContext *context = [[LAContext alloc] init];
NSError *error = nil;
//验证是否支持指纹识别
if ([context canEvaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics error:&error]) {
NSLog(@"支持指纹识别的应用");
//验证身份
[context evaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics localizedReason:NSLocalizedString(@"需要指纹来验证你的身份", @"hello") reply:^(BOOL success, NSError *error) {
if (success) {
NSLog(@"成功");
} else {
switch (error.code) {
case LAErrorUserCancel:
NSLog(@"用户取消了授权 - %@", error.localizedDescription);
break;
case LAErrorUserFallback:
NSLog(@"用户点击了“输入密码”按钮 - %@", error.localizedDescription);
break;
case LAErrorAuthenticationFailed:
NSLog(@"您已授权失败3次 - %@", error.localizedDescription);
break;
case LAErrorTouchIDLockout:
NSLog(@"指纹被锁定 - %@", error.localizedDescription);
break;
case LAErrorSystemCancel:
NSLog(@"应用程序进入后台 - %@", error.localizedDescription);
break;
default:
NSLog(@"++%@--%zd", error.localizedDescription, error.code);
break;
}
}
}];
} else {
switch (error.code) {
case LAErrorPasscodeNotSet:
NSLog(@"未设置密码 - %@", error.localizedDescription);
break;
case LAErrorTouchIDNotEnrolled:
NSLog(@"未注册 Touch ID - %@", error.localizedDescription);
break;
case kLAErrorTouchIDNotAvailable:
NSLog(@"该设备不支持 Touch ID - %@", error.localizedDescription);
break;
default:
NSLog(@"--%@--%zd", error.localizedDescription, error.code);
break;
}
}
