如何创建密码视图 iphone

Question

我想在我的应用中添加密码锁...
我创建了视图，但我不知道如何让它工作......

这是我希望它必须做的：
- 如果用户正在设置他的密码，他必须输入两次，并且密码必须验证第二次输入的密码是否与第一次相同。
- 如果密码控制器被设置视图调用，例如设置密码，它必须在导航栏上有一个取消按钮，但如果在应用启动时调用它，则不能启用取消按钮。

summaryLabel 是显示“密码不匹配。再试一次”之类的消息的标签。当密码与之前写入或保存的密码不同时。

EDIT1：如何使用 textField:shouldChangeCharactersInRange:replacementString 方法来做到这一点？

这是代码：

#import "PasscodeController.h"

@implementation PasscodeController

@synthesize panelView;
@synthesize summaryLabel;
@synthesize titleLabel;
@synthesize textField1;
@synthesize textField2;
@synthesize textField3;
@synthesize textField4;
@synthesize hiddenTF;

-(void)viewDidLoad {
self.title = @"Passcode"; 
self.view.backgroundColor = [UIColor groupTableViewBackgroundColor];
titleLabel = [[UILabel alloc] initWithFrame:CGRectMake(25, 22, 270, 30)];
titleLabel.font = [UIFont boldSystemFontOfSize:15];
titleLabel.textAlignment = UITextAlignmentCenter;
titleLabel.textColor = [UIColor colorWithRed:66.0/255.0 green:85.0/255.0 blue:102.0/255.0 alpha:1.0];
titleLabel.backgroundColor = [UIColor clearColor];
[self.view addSubview:titleLabel];
[titleLabel release];

summaryLabel = [[UILabel alloc] initWithFrame:CGRectMake(25, 130, 270, 40)];
summaryLabel.font = [UIFont boldSystemFontOfSize:12];
summaryLabel.numberOfLines = 0;
summaryLabel.baselineAdjustment = UIBaselineAdjustmentNone;
summaryLabel.textAlignment = UITextAlignmentCenter;
summaryLabel.textColor = [UIColor colorWithRed:66.0/255.0 green:85.0/255.0 blue:102.0/255.0 alpha:1.0];
summaryLabel.backgroundColor = [UIColor clearColor];
[self.view addSubview:summaryLabel];
[summaryLabel release];

textField1 = [[UITextField alloc] initWithFrame:CGRectMake(25, 60, 60, 60)];
textField1.borderStyle = UITextBorderStyleBezel;
textField1.textColor = [UIColor blackColor];
textField1.textAlignment = UITextAlignmentCenter;
textField1.font = [UIFont systemFontOfSize:41];
textField1.secureTextEntry = YES;
textField1.backgroundColor = [UIColor whiteColor];
textField1.keyboardType = UIKeyboardTypeNumberPad;
[self.view addSubview:textField1];
[textField1 release];

textField2 = [[UITextField alloc] initWithFrame:CGRectMake(95, 60, 60, 60)];
textField2.borderStyle = UITextBorderStyleBezel;
textField2.textColor = [UIColor blackColor];
textField2.textAlignment = UITextAlignmentCenter;
textField2.font = [UIFont systemFontOfSize:41];
textField2.secureTextEntry = YES;
textField2.backgroundColor = [UIColor whiteColor];
textField2.keyboardType = UIKeyboardTypeNumberPad;
[self.view addSubview:textField2];
[textField2 release];

textField3 = [[UITextField alloc] initWithFrame:CGRectMake(165, 60, 60, 60)];
textField3.borderStyle = UITextBorderStyleBezel;
textField3.textColor = [UIColor blackColor];
textField3.textAlignment = UITextAlignmentCenter;
textField3.font = [UIFont systemFontOfSize:41];
textField3.secureTextEntry = YES;
textField3.backgroundColor = [UIColor whiteColor];
textField3.keyboardType = UIKeyboardTypeNumberPad;
[self.view addSubview:textField3];
[textField3 release];

textField4 = [[UITextField alloc] initWithFrame:CGRectMake(235, 60, 60, 60)];
textField4.borderStyle = UITextBorderStyleBezel;
textField4.textColor = [UIColor blackColor];
textField4.textAlignment = UITextAlignmentCenter;
textField4.font = [UIFont systemFontOfSize:41];
textField4.secureTextEntry = YES;
textField4.backgroundColor = [UIColor whiteColor];
textField4.keyboardType = UIKeyboardTypeNumberPad;
[self.view addSubview:textField4];
[textField4 release];

hiddenTF = [[UITextField alloc] initWithFrame:CGRectZero];
hiddenTF.hidden = YES;
hiddenTF.delegate = self;
hiddenTF.keyboardType = UIKeyboardTypeNumberPad;
[self.view addSubview:hiddenTF];
[hiddenTF release];
[hiddenTF becomeFirstResponder];
}

非常感谢！

Answer 1

另一种解决方案 KVPasscodeViewController（我的）可在此处获得：https://github.com/Koolistov/Passcode（BSD 许可证）。

Answer 2

如果这对其他人有帮助，我用 GitHub 上的源代码解决了我的问题：PTPasscodeViewController。
我对其进行了一些更改以使其适应我的需要，现在效果很好:)

如果你想使用它，在项目页面或文件中都有关于如何使用它的所有信息（如果你已经下载了）；）

希望对您有所帮助！

P.S.：非常感谢 Lasha Dolidze 提供此代码！

Answer 3

PINCode 1.0