如果设备支持Touch ID [英] If Device Supports Touch ID

问题描述

想知道我如何确定用户是否支持Touch ID API的设备？希望将此作为布尔值。

Wondering how I can determine if the device the user has supports the Touch ID API? Hopefully have this as a boolean value.

谢谢！

推荐答案

试试这个：

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

或者像@rckoenes建议：

or like @rckoenes suggest:

- (BOOL)canAuthenticateByTouchId {
    if ([LAContext class]) {
        return [[[LAContext alloc] init] canEvaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics error:nil];
    }
    return NO;
}

更新

我忘了，检查一下：我们如何以编程方式检测运行设备的iOS版本？来定义 SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO

I forgot, check this: How can we programmatically detect which iOS version is device running on? to define SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO

这篇关于如果设备支持Touch ID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！