如何检查是否启用TouchID [英] How to check TouchID enable or not

问题描述

有什么方法可以检查我的应用是否已启用TouchID，

Is there any way to check my application is enable with TouchID,

如何检查我的应用程序是否已启用TouchID，

How can i check if my application is enable with TouchID,

例如:

DropBox具有启用图形打印传感器启用的功能.现在有什么方法可以检查我的应用程序是否基于启用touchid来显示TouchID屏幕.

DropBox have capability to enable figure print sensor enable. now is there any method to check if my application showing TouchID screen based on touchid enable.

推荐答案

根据您使用的 Objective-C

According you use Objective-C

首先，添加检查iOS版本的方法

First, add method to check iOS Version

TouchID需要iOS8 +才能运行

TouchID needs iOS8+ to work

#define SYSTEM_VERSION_EQUAL_TO(v)                  ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedSame)
#define SYSTEM_VERSION_GREATER_THAN(v)              ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedDescending)
#define SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(v)  ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedAscending)
#define SYSTEM_VERSION_LESS_THAN(v)                 ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedAscending)
#define SYSTEM_VERSION_LESS_THAN_OR_EQUAL_TO(v)     ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedDescending)

然后，使用LAContext canEvaluatePolicy:error:评估TouchID是否存在

Then, use LAContext canEvaluatePolicy:error: to evaluate if TouchID exist

取消验证策略，以查看验证是否可能成功

Preflights an authentication policy to see if it is possible for authentication to succeed

- (BOOL)isTouchIDAvailable {
    if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"8.0")) {
        return [[[LAContext alloc] init] canEvaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics error:nil];
    }
    return NO;
}

这篇关于如何检查是否启用TouchID的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！