iOS中应用内添加指纹识别的实例代码
iOS8之后苹果发布了指纹识别的功能，通过touchID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>
LAContext*context=[[LAContextalloc]init];
NSError*error=nil;
//验证是否支持指纹识别
if([contextcanEvaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometricserror:&error]){
NSLog(@"支持指纹识别的应用");
//验证身份
[contextevaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometricslocalizedReason:NSLocalizedString(@"需要指纹来验证你的身份",@"hello")reply:^(BOOLsuccess,NSError*error){
if(success){
NSLog(@"成功");
}else{
switch(error.code){
caseLAErrorUserCancel:
NSLog(@"用户取消了授权-%@",error.localizedDescription);
break;
caseLAErrorUserFallback:
NSLog(@"用户点击了“输入密码”按钮-%@",error.localizedDescription);
break;
caseLAErrorAuthenticationFailed:
NSLog(@"您已授权失败3次-%@",error.localizedDescription);
break;
caseLAErrorTouchIDLockout:
NSLog(@"指纹被锁定-%@",error.localizedDescription);
break;
caseLAErrorSystemCancel:
NSLog(@"应用程序进入后台-%@",error.localizedDescription);
break;
default:
NSLog(@"++%@--%zd",error.localizedDescription,error.code);
break;
}
}
}];
}else{
switch(error.code){
caseLAErrorPasscodeNotSet:
NSLog(@"未设置密码-%@",error.localizedDescription);
break;
caseLAErrorTouchIDNotEnrolled:
NSLog(@"未注册TouchID-%@",error.localizedDescription);
break;
casekLAErrorTouchIDNotAvailable:
NSLog(@"该设备不支持TouchID-%@",error.localizedDescription);
break;
default:
NSLog(@"--%@--%zd",error.localizedDescription,error.code);
break;
}
}