iOS开发之指纹解锁

引入依赖框架:

#import 指纹验证的实现 - (void)authenticateUser { //初始化上下文对象 LAContext* context = [[LAContext alloc] init]; //错误对象 NSError* error = nil; NSString* result = @"Authentication is needed to access your notes."; //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); [self showPasswordAlert]; }}对几种情况的说明 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);

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