iOS8.0 How to use Touch ID for verification

For Objective-c, just a few lines of code can be done.

Like what:

#import <localauthentication/localauthentication.h>-(void) viewdidload{[Super Viewdidload]; //additional setup after loading the view, typically from a nib.Lacontext*context =[[Lacontext alloc] init]; if(![Context Canevaluatepolicy:lapolicydeviceownerauthenticationwithbiometrics Error:nil]) NSLog (@"Touch ID not supported!"); [Context evaluatepolicy:lapolicydeviceownerauthenticationwithbiometrics Localizedreason:@"Retrieve password"reply:^void(BOOL success, Nserror *error) {NSLog (@"Is success?%d", success); if(!success) {            Switch(error.code) { CaseLaerrorauthenticationfailed:nslog (@"Authentication Failed");  Break;  CaseLaerrorusercancel:nslog (@"User Cancelled");  Break;  CaseLaerroruserfallback:nslog (@"User Fallback");  Break;  CaseLaerrorsystemcancel:nslog (@"System Cancelled");  Break;  CaseLaerrorpasscodenotset:nslog (@"Passcode not Set");  Break;  CaseLaerrortouchidnotavailable:nslog (@"Touch ID not Available");  Break; default:                     Break; }        }    }];}

iOS8.0 How to use Touch ID for verification