Touch ID的基本用法

2017-01-14 10:04:52来源:http://www.jianshu.com/p/10ff5bddb133作者:smanx人点击


Xcode 8.1 or later
iOS 8.0 or later
引入指纹解锁必须的头文件
#import <LocalAuthentication/LocalAuthentication.h>

判断设备是否支持TouchID
- (BOOL)canEvaluatePolicy:(LAPolicy)policy error:(NSError * __autoreleasing *)error __attribute__((swift_error(none)));

弹出框出来验证TouchID,Block返回成功和失败的回调
- (void)evaluatePolicy:(LAPolicy)policy localizedReason:(NSString *)localizedReason reply:(void(^)(BOOL success, NSError * __nullable error))reply;

验证的例子
//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
}
else
{
NSLog(@"%@",error.localizedDescription);
switch (error.code) {
case LAErrorSystemCancel:
{
NSLog(@"Authentication was cancelled by the system");
//切换到其他APP,系统取消验证Touch ID
break;
}
case LAErrorUserCancel:
{
NSLog(@"Authentication was cancelled by the user");
//用户取消验证Touch ID
break;
}
case LAErrorUserFallback:
{
NSLog(@"User selected to enter custom password");
[[NSOperationQueue mainQueue] addOperationWithBlock:^{
//用户选择其他验证方式,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
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);
}

几种返回的错误的枚举值
typedef NS_ENUM(NSInteger, LAError)
{
//授权失败
LAErrorAuthenticationFailed = kLAErrorAuthenticationFailed,
//用户取消Touch ID授权
LAErrorUserCancel = kLAErrorUserCancel,
//用户选择输入密码
LAErrorUserFallback = kLAErrorUserFallback,
//系统取消授权(例如其他APP切入)
LAErrorSystemCancel = kLAErrorSystemCancel,
//系统未设置密码
LAErrorPasscodeNotSet =kLAErrorPasscodeNotSet,
//设备Touch ID不可用,例如未打开
LAErrorTouchIDNotAvailable = kLAErrorTouchIDNotAvailable,
//设备Touch ID不可用,用户未录入
LAErrorTouchIDNotEnrolled = kLAErrorTouchIDNotEnrolled, } NS_ENUM_AVAILABLE(10_10, 8_0);
}

Touch ID的简单例子:https://github.com/smanx/Touch-ID-Demo




最新文章

123

最新摄影

微信扫一扫

第七城市微信公众平台