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我正在开发一个需要“锁定屏幕”的应用程序，用户必须输入密码才能访问存储在应用程序中的数据。

每当应用程序启动和用户不活动几分钟后，应显示此锁定屏幕。

目前，我的故事板中有一个单独的 UIViewController，它没有连接到故事板中的任何其他视图。我知道我可以通过将 instantiateViewControllerWithIdentifier 发送到 [self storyboard] 来访问这个视图控制器。但是，这不适用于应用程序委托。

但是我需要在应用程序委托尝试打开数据库之前从应用程序委托调用锁定屏幕。

什么是实现这一点的好方法？

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3 回答 3

4

这可能是一个迟到的答案，但我必须为我的一位使用 Storyboard 的客户实现相同的要求。您可以从这里下载完整的项目。希望这可以帮助某人。

我创建了两个 Viewcontroller，一个是 MainView，另一个需要一个四位数的代码才能关闭。我在 MainView 和 BlockKeypadViewController 之间创建了一个模态 segue，并将其命名为“lockItSegue”。在 MainView 上，我插入了一个调用“lockIt”方法的 RoundRectButton。该方法只执行segue“lockItSegue”。 

- (IBAction)lockIt:(id)sender 
{
    [self performSegueWithIdentifier:@"lockItSegue" sender:self];
}

在 BlockKeypadViewController.h 上，我创建了

//
//  BlockKeypadViewController.h
//  Consultablet
//
//  Created by EDGARD AGUIRRE ROZO on 22/03/13.
//  Copyright (c) 2013 Colombia Creative Software. All rights reserved.
//

#import <UIKit/UIKit.h>
#import <QuartzCore/QuartzCore.h>

@interface BlockKeypadViewController : UIViewController
@property (strong, nonatomic) IBOutlet UILabel *wrongCodeLabel;//*codigoIncorrectoLabel;
@property (strong, nonatomic) IBOutlet UILabel *tryAgainLabel;//*trateNuevamenteLabel;

@property (strong, nonatomic) IBOutlet UILabel *digit1;//*caracter1;
@property (strong, nonatomic) IBOutlet UILabel *digit2;//*caracter2;
@property (strong, nonatomic) IBOutlet UILabel *digit3;//*caracter3;
@property (strong, nonatomic) IBOutlet UILabel *digit4;//*caracter4;
@property int counter;//contador;
@property int codeIn;//claveIngresado;
@property int unlockCode;//claveDesbloqueo;
-(void) calculate:(int)number;//calcular:(int)numero;
- (IBAction)one:(id)sender;//uno:(id)sender;
- (IBAction)two:(id)sender;//dos:(id)sender;
- (IBAction)three:(id)sender;//tres:(id)sender;
- (IBAction)four:(id)sender;//cuatro:(id)sender;
- (IBAction)five:(id)sender;//cinco:(id)sender;
- (IBAction)six:(id)sender;//seis:(id)sender;
- (IBAction)seven:(id)sender;//siete:(id)sender;
- (IBAction)eight:(id)sender;//ocho:(id)sender;
- (IBAction)nine:(id)sender;//nueve:(id)sender;
- (IBAction)zero:(id)sender;//cero:(id)sender;
- (IBAction)cancel:(id)sender;//cancel:(id)sender;
-(void)checkCode;//verificarClave;

@end

在 BlockKeypadViewController.m 上：

//
//  BlockKeypadViewController.m
//  Consultablet
//
//  Created by EDGARD AGUIRRE ROZO on 22/03/13.
//  Copyright (c) 2013 Colombia Creative Software. All rights reserved.
//

#import "BlockKeypadViewController.h"
@implementation UILabel (My2)
//- (void)setImage:(UIImage *)image forState:(UIControlState)state animated:(BOOL)animated
- (void)setHidden:(BOOL)hidden animated:(BOOL)animated
{
    //[self setImage:image forState:state];
    [self setHidden:hidden];
    if (animated)
    {
        CATransition *animation = [CATransition animation];
        [animation setType:kCATransitionFade];
        [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];
        [animation setFillMode:kCAFillModeBoth];
        [animation setDuration:.3];
        [[self layer] addAnimation:animation forKey:@"UILabelSetAnimationKey"];
    }
}
- (void)setHidden:(BOOL)hidden animated:(BOOL)animated seconds:(int)seconds
{
    //[self setImage:image forState:state];
    [self setHidden:hidden];
    if (animated)
    {
        CATransition *animation = [CATransition animation];
        [animation setType:kCATransitionFade];
        [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];
        [animation setFillMode:kCAFillModeBoth];
        [animation setDuration:seconds];
        [[self layer] addAnimation:animation forKey:@"UILabelSetAnimationKey"];
    }
}
@end
@interface BlockKeypadViewController ()

@end

@implementation BlockKeypadViewController
@synthesize digit1,digit2,digit3,digit4,counter,codeIn,unlockCode,wrongCodeLabel,tryAgainLabel;

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.counter = 1;
    self.codeIn=0;

    self.unlockCode=1234;
    NSLog(@"Unlock Code %d",self.unlockCode);

    [digit1 setHidden:YES animated:YES];
    [digit2 setHidden:YES animated:YES];
    [digit3 setHidden:YES animated:YES];
    [digit4 setHidden:YES animated:YES];
}
-(void)checkCode
{
    if(self.codeIn==self.unlockCode)
    {
        [self dismissViewControllerAnimated:YES completion:nil];
    }
    else
    {
        [wrongCodeLabel setHidden:NO animated:YES seconds:.1];
        [tryAgainLabel setHidden:NO animated:YES seconds:.1];
        [self.digit1 setHidden:YES animated:YES];
        [self.digit2 setHidden:YES animated:YES];
        [self.digit3 setHidden:YES animated:YES];
        [self.digit4 setHidden:YES animated:YES];
        self.codeIn = 0;

        NSLog(@"Wrong Code");
    }
}
- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
}
-(void) calculate:(int)number
{
    if(self.counter==1)
    {
        [wrongCodeLabel setHidden:YES animated:YES seconds:.2];
        [tryAgainLabel setHidden:YES animated:YES seconds:.2];
        [self.digit1 setHidden:NO animated:YES];
        self.codeIn = number*1000;
    }
    if(self.counter==2)
    {
        [self.digit2 setHidden:NO animated:YES];
        self.codeIn = self.codeIn+number*100;
    }
    if(self.counter==3)
    {
        [self.digit3 setHidden:NO animated:YES];
        self.codeIn = self.codeIn+number*10;
    }
    if(self.counter==4)
    {
        [self.digit4 setHidden:NO animated:YES];
        self.codeIn = self.codeIn+number;
        [self performSelector:@selector(checkCode) withObject:nil afterDelay:0.2];
    }
    if(self.counter<4)
    {
        self.counter++;
    }
    else
    {
        self.counter=1;
    }
}
- (IBAction)one:(id)sender
{
    [self calculate:1];
}
- (IBAction)two:(id)sender
{
    [self calculate:2];
}
- (IBAction)three:(id)sender
{
    [self calculate:3];
}
- (IBAction)four:(id)sender
{
    [self calculate:4];
}
- (IBAction)five:(id)sender
{
    [self calculate:5];
}
- (IBAction)six:(id)sender
{
   [self calculate:6];
}
- (IBAction)seven:(id)sender
{
    [self calculate:7];
}
- (IBAction)eight:(id)sender
{
    [self calculate:8];
}
- (IBAction)nine:(id)sender
{
    [self calculate:9];
}
- (IBAction)zero:(id)sender
{
    [self calculate:0];
}
- (IBAction)cancel:(id)sender
{
    [self.digit1 setHidden:YES animated:YES];
    [self.digit2 setHidden:YES animated:YES];
    [self.digit3 setHidden:YES animated:YES];
    [self.digit4 setHidden:YES animated:YES];
    self.codeIn = 0;
    self.counter = 1;
}


@end
于 2013-04-09T23:04:12.103 回答
0

不需要（我实际上不建议将它用于这只海豚）使用AppDelegate来实现这个或任何LockScreen解决方案。RootViewController您应该从to创建一个 segueLockScreen并根据需要命名（例如lockItSegue）。然后从按钮动作调用[self performSegueWithIdentifier:@"lockItSegue" sender:self]; 的逻辑（BlockKeypadViewController.m）上LockScreen（一旦用户输入了正确的代码），调用[self dismissViewControllerAnimated:YES completion:nil];

于 2013-04-13T16:21:16.427 回答
0

要从 appDelegate 在 HomeVC 上显示 lockVC，请使用以下命令：

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
HomeVC *hvc = [storyboard instantiateViewControllerWithIdentifier:@"HomeVC"];
self.window.rootViewController = hvc;
[self.window makeKeyAndVisible];

LockVC *lvc = [storyboard instantiateViewControllerWithIdentifier:@"LockVC"] 
[self.window.rootViewController presentViewController:lvc animated:YES completion:nil];
于 2013-01-29T20:21:39.587 回答