我想在我的应用程序中添加密码锁...
我创建了 View ,但我不知道如何让它工作......
这就是我希望它必须做的:
- 如果用户设置密码,则必须输入两次,并且代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 Controller 由设置 View 调用,例如,为了设置密码,它必须在导航栏上有一个取消按钮,但如果在应用程序启动时调用它,则不得启用取消按钮。
summaryLabel 是显示“密码不匹配。请重试”之类消息的标签。当密码与之前写入或保存的密码不同时。
编辑1:如何使用textField:shouldChangeCharactersInRange:replacementString方法来执行此操作?
这是代码:
#import "PasscodeController.h"<p></p> <p>@implementation PasscodeController</p> <p>@synthesize panelView; @synthesize summaryLabel; @synthesize titleLabel; @synthesize textField1; @synthesize textField2; @synthesize textField3; @synthesize textField4; @synthesize hiddenTF;</p> <p>-(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];</p> <p>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];</p> <p>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];</p> <p>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];</p> <p>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];</p> <p>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];</p>
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!
最佳答案
另一个解决方案,KVPasscodeViewController(我的),可以在这里找到:https://github.com/Koolistov/Passcode (BSD 许可证)。
关于iphone - 如何创建 iphone 密码查看,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/4528707/