導(dǎo)入頭文件

#import <LocalAuthentication/LocalAuthentication.h>

因?yàn)橹讣y識(shí)別是蘋(píng)果在iOS8才出的一個(gè)功能债蓝，所以進(jìn)行判斷是不是iOS8以及之后的系統(tǒng)版本

if ([UIDevice currentDevice].systemVersion.floatValue < 8.0) {
        return;
    }

獲取指紋識(shí)別

- (void)getTouchIDMethod
{
    //創(chuàng)建LAContext
    LAContext* context = [[LAContext alloc] init];
    NSError* error = nil;
    NSString* result = @"請(qǐng)驗(yàn)證已有指紋";
    
    //首先使用canEvaluatePolicy 判斷設(shè)備支持狀態(tài)
    if ([context canEvaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics error:&error]) {
        //支持指紋驗(yàn)證
        [context evaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics localizedReason:result reply:^(BOOL success, NSError *error) {
            if (success) {
                //驗(yàn)證成功苛骨，主線(xiàn)程處理UI
                NSLog(@"驗(yàn)證成功");
            }
            else
            {
                NSLog(@"%@",error.localizedDescription);
                switch (error.code) {
                    case LAErrorSystemCancel:
                    {
                        //系統(tǒng)取消授權(quán)运悲，如其他APP切入
                        break;
                    }
                    case LAErrorUserCancel:
                    {
                        //用戶(hù)取消驗(yàn)證Touch ID
                        break;
                    }
                    case LAErrorAuthenticationFailed:
                    {
                        //授權(quán)失敗
                        break;
                    }
                    case LAErrorPasscodeNotSet:
                    {
                        //系統(tǒng)未設(shè)置密碼
                        break;
                    }
                    case LAErrorTouchIDNotAvailable:
                    {
                        //設(shè)備Touch ID不可用，例如未打開(kāi)
                        break;
                    }
                    case LAErrorTouchIDNotEnrolled:
                    {
                        //設(shè)備Touch ID不可用熟丸，用戶(hù)未錄入
                        break;
                    }
                    case LAErrorUserFallback:
                    {
                        [[NSOperationQueue mainQueue] addOperationWithBlock:^{
                            //用戶(hù)選擇輸入密碼，切換主線(xiàn)程處理
                            
                        }];
                        break;
                    }
                    default:
                    {
                        [[NSOperationQueue mainQueue] addOperationWithBlock:^{
                            //其他情況，切換主線(xiàn)程處理
                        }];
                        break;
                    }
                }
            }
        }];
    }
    else
    {
        //不支持指紋識(shí)別，LOG出錯(cuò)誤詳情
        NSLog(@"不支持指紋識(shí)別");
        
        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);
    }
}