PINViewios加密解锁

PINView 让你实现加密解锁屏幕的操作，需要输入 4 个数字解锁码。

使用方法：

GCPINViewController *PIN = [[GCPINViewController alloc]
                            initWithNibName:nil
                            bundle:nil
                            mode:GCPINViewControllerModeCreate];
PIN.messageText = @"Create Passcode";
PIN.errorText = @"The passcodes do not match";
PIN.verifyBlock = ^(NSString *code) {
    NSLog(@"setting code: %@", code);
    return YES;
};
[PIN presentFromViewController:self animated:YES];
[PIN release];