iOS-删除对我已删除的属性的引用 [英] iOS - removing reference of a property I had deleted

问题描述

我之前创建了一个按钮作为IBAction，并将其命名为"hi".我从 .h 和 .m 文件中手动删除了代码，并从情节提要中删除了按钮，现在出现以下错误:

I had created a button earlier as an IBAction and named it 'hi.' I manually deleted the code from my .h and .m file, and deleted the button from the storyboard and now I'm getting the error below:

2014-02-08 18:31:53.135 MadLibs2 [7645:70b] * 由于以下原因终止了应用 未捕获的异常"NSUnknownKeyException"，原因: '[setValue:forUndefinedKey:]:此类 不符合密钥Hi的密钥值编码要求.'

2014-02-08 18:31:53.135 MadLibs2[7645:70b] * Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[ setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key hi.'

如何删除"hi"参考?

How do I remove the 'hi' reference?

//  JBViewController.h
//  MadLibs2

#import <UIKit/UIKit.h>

@interface JBViewController : UIViewController

// Properties manage an object's internal data
//// A properties data is stored in an instance variable or ivar (e.g., *sliderLabel)
// The property accesses ivars via getter/setter methods (aka accessors)
// put @property in front of the declaration of the ivar
// We access properties using the self keyword
@property (weak, nonatomic) IBOutlet UILabel *sliderLabel;
- (IBAction)sliderChanged:(id)sender;
- (IBAction)toggleShowHide:(id)sender;

@property (weak, nonatomic) IBOutlet UIView *settingsView;

@property (weak, nonatomic) IBOutlet UISwitch *endingSwitch;

@property (weak, nonatomic) IBOutlet UILabel *petsLabel;

@property (weak, nonatomic) IBOutlet UIStepper *petsStepper;

- (IBAction)stepperChanged:(id)sender;

- (IBAction)createStory:(id)sender;
@end

//  JBViewController.m
//  MadLibs2

#import "JBViewController.h"

@interface JBViewController ()

@end

@implementation JBViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (IBAction)sliderChanged:(id)sender {
    UISlider *slider = (UISlider *)sender;
    //why not NSInteger?
    int numberAsInt = (int) (slider.value + 0.5f);
    NSString *newText = [[NSString alloc] initWithFormat:@"%d", numberAsInt];
    //self is used to access properties
    /// What is 'text' used for? Is it a method?
    self.sliderLabel.text = newText;
}

- (IBAction)toggleShowHide:(id)sender {
    UISegmentedControl *segmentedControl =
    (UISegmentedControl *)sender;
    NSInteger segment = segmentedControl.selectedSegmentIndex;
    if (segment == 0)
        // self is used to access properties
        [self.settingsView setHidden:YES];
    else
        [self.settingsView setHidden:NO];

}
- (IBAction)stepperChanged:(id)sender {
    // update petsLabel to increase or decrease value
    UIStepper *stepper = (UIStepper *) sender;
    //NSLog([NSString stringWithFormat:@"%d",(int)stepper.value]);
    int stepperNum = (int)stepper.value;
    NSString *numPets = [[NSString alloc] initWithFormat:@"%d", stepperNum];
    self.petsLabel.text = numPets;
}

- (IBAction)createStory:(id)sender {
}
@end

推荐答案

您应该选择该按钮，然后在连接检查器"中查找，引用应该出现在其中.

You should select the button and look in the "connections inspector", the reference should appear there.

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