iOS 指纹解锁 验证TouchID

iOS指纹解锁

1、首先,引入依赖框架 LocalAuthentication.framework

#import <LocalAuthentication/LocalAuthentication.h>

2、然后,判断系统是否为iOS8及以上

//iOS8.0后才支持指纹识别接口
if ([UIDevice currentDevice].systemVersion.floatValue < 8.0) {
return;
}

3、最后,在APP启动时调用以下方法即可完成指纹解锁的全部功能集成

- (void)evaluateAuthenticate
{
//创建LAContext
LAContext* context = [[LAContext alloc] init];
NSError* error = nil;
NSString* result = @"请验证已有指纹"; //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:
{
//系统取消授权,如其他APP切入
break;
}
case LAErrorUserCancel:
{
//用户取消验证Touch ID
break;
}
case LAErrorAuthenticationFailed:
{
//授权失败
break;
}
case LAErrorPasscodeNotSet:
{
//系统未设置密码
break;
}
case LAErrorTouchIDNotAvailable:
{
//设备Touch ID不可用,例如未打开
break;
}
case LAErrorTouchIDNotEnrolled:
{
//设备Touch ID不可用,用户未录入
break;
}
case LAErrorUserFallback:
{
[[NSOperationQueue mainQueue] addOperationWithBlock:^{
//用户选择输入密码,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
NSLog(@"不支持指纹识别"); 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);
}
}
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