iOS8之后苹果发布了指纹识别的功能,通过touch ID来识别用户,做用户授权,主要是依赖于LocalAuthentication库
指纹识别:一判断设备是否支持指纹识别功能
二识别指纹,成功后做相应的动作,失败后提醒用户指纹识别失败
先引入#import <LocalAuthentication/LocalAuthentication.h>
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LAContext *context = [[LAContext alloc] init];
NSError *error = nil;
//验证是否支持指纹识别
if ([context canEvaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics error:&error]) {
NSLog(@ "支持指纹识别的应用" );
//验证身份
[context evaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics localizedReason:NSLocalizedString(@ "需要指纹来验证你的身份" , @ "hello" ) reply:^(BOOL success, NSError *error) {
if (success) {
NSLog(@ "成功" );
} else {
switch (error.code) {
case LAErrorUserCancel:
NSLog(@ "用户取消了授权 - %@" , error.localizedDescription);
break ;
case LAErrorUserFallback:
NSLog(@ "用户点击了“输入密码”按钮 - %@" , error.localizedDescription);
break ;
case LAErrorAuthenticationFailed:
NSLog(@ "您已授权失败3次 - %@" , error.localizedDescription);
break ;
case LAErrorTouchIDLockout:
NSLog(@ "指纹被锁定 - %@" , error.localizedDescription);
break ;
case LAErrorSystemCancel:
NSLog(@ "应用程序进入后台 - %@" , error.localizedDescription);
break ;
default :
NSLog(@ "++%@--%zd" , error.localizedDescription, error.code);
break ;
}
}
}];
} else {
switch (error.code) {
case LAErrorPasscodeNotSet:
NSLog(@ "未设置密码 - %@" , error.localizedDescription);
break ;
case LAErrorTouchIDNotEnrolled:
NSLog(@ "未注册 Touch ID - %@" , error.localizedDescription);
break ;
case kLAErrorTouchIDNotAvailable:
NSLog(@ "该设备不支持 Touch ID - %@" , error.localizedDescription);
break ;
default :
NSLog(@ "--%@--%zd" , error.localizedDescription, error.code);
break ;
}
}
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原文链接:http://www.cnblogs.com/liyy2015/archive/2016/12/13/6169880.html