基于标签的多功能UIButton更改UILabel的线程中断

Question

我有一个 UIButton，它有多种方法。正如您将在我的代码中看到的那样，每次按下 UIButton 时，它都会更改其标签，从而让我让它每次都做不同的事情（所以第一次做事情 A，第二次做事情 B，等等）。我确实发现由于某种原因 iPhone 一次会执行两种这样的方法，所以我在每个真实的方法之间添加了一个无用的方法。这工作得很好，但由于某种原因它刚刚停止工作，我不知道为什么。现在它在第一次按下 UIButton 时就出现了线程中断。任何帮助表示赞赏。

ViewController.h：

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController  <UITextViewDelegate> {
    IBOutlet UITextView *textEnterView;
    IBOutlet UILabel *promptLabel;
    IBOutlet UIButton *nextButton;

    NSString *topicString;
    NSString *firstString;
    NSString *firstSubString;
    NSString *secondString;
    NSString *secondSubString;
    NSString *thirdString;
    NSString *thirdSubString;
    NSString *conclusionString;
}
@property (nonatomic, retain) UITextView *textEnterView;
@property (nonatomic, retain) UILabel *promptLabel;
@property (nonatomic, retain) UIButton *nextButton;

@property (nonatomic, retain) NSString *topicString;
@property (nonatomic, retain) NSString *firstString;
@property (nonatomic, retain) NSString *firstSubString;
@property (nonatomic, retain) NSString *secondString;
@property (nonatomic, retain) NSString *secondSubString;
@property (nonatomic, retain) NSString *thirdString;
@property (nonatomic, retain) NSString *thirdSubString;
@property (nonatomic, retain) NSString *conclusionString;


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

ViewController.m：

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController
@synthesize textEnterView, promptLabel, nextButton, firstSubString, firstString, secondSubString, secondString, thirdSubString, thirdString, conclusionString, topicString;

- (void)viewDidLoad
{
    UIButton *button = nextButton;
    [button setTag:1234];
    [button addTarget:self action:@selector(next:) forControlEvents:UIControlEventTouchUpInside];
    textEnterView.delegate = self;
    promptLabel.text = @"First Label";
    textEnterView.text = @" ";
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

}
- (IBAction) next:(UIButton *)sender {
    if(nextButton.tag==1234) {
    promptLabel.text = @"Second Label";
        [nextButton setTag:2];
        topicString = textEnterView.text;
        //FAKE METHOD
    }
    else if (nextButton.tag==2) {
        promptLabel.text = @"Third Label";
        textEnterView.text = @" ";
        [nextButton setTag:3];
        //REAL METHOD
    }
    else if (nextButton.tag==3) {
        promptLabel.text = @"Fourth Label";
        firstString = textEnterView.text;
        [nextButton setTag:4];
        //FAKE METHOD
    }
    else if (nextButton.tag==4) {
        promptLabel.text = @"Fifth Label";
        textEnterView.text = @" ";
        [nextButton setTag:5];
        //REAL METHOD
    }

    else if (nextButton.tag==5) {
        promptLabel.text = @"Sixth Label";
        firstSubString = textEnterView.text;
        [nextButton setTag:6];
        //FAKE METHOD
    }
    else if (nextButton.tag==6) {
        promptLabel.text = @"Seventh Label";
        textEnterView.text = @" ";
        [nextButton setTag:7];
        //REAL METHOD
    }
    else if (nextButton.tag==7) {
        promptLabel.text = @"Eighth Label";
        secondString = textEnterView.text;
        [nextButton setTag:8];
        //FAKE METHOD
    }
    else if (nextButton.tag==8) {
        promptLabel.text = @"Ninth Label";
        textEnterView.text = @" ";
        [nextButton setTag:9];
    //REAL METHOD
    }
    else if (nextButton.tag==9) {
        promptLabel.text = @"Tenth Label";
        secondSubString = textEnterView.text;
        [nextButton setTag:10];
    //FAKE METHOD
    }
    else if (nextButton.tag==10) {
        promptLabel.text = @"Eleventh Label";
        textEnterView.text = @" ";
        [nextButton setTag:11];
    //REAL METHOD
    }
    else if (nextButton.tag==11) {
        promptLabel.text = @"Twelfth Label";
        thirdString = textEnterView.text;
        [nextButton setTag:12];
    //FAKE METHOD
    }
    else if (nextButton.tag==12) {
        promptLabel.text = @"Thirteenth Label";
        textEnterView.text = @" ";
        [nextButton setTag:13];
    //REAL METHOD
    }
    else if (nextButton.tag==13) {
        promptLabel.text = @"Fourteenth Label";
        thirdSubString = textEnterView.text;
        [nextButton setTag:14];
    //FAKE METHOD
    }
    else if (nextButton.tag==14) {
        promptLabel.text = @"Fifteenth Label";
        textEnterView.text = @" ";
        [nextButton setTag:15];
    //REAL METHOD
    }
    else if (nextButton.tag==15) {
        promptLabel.text = @"Sixteenth Label";
        conclusionString = textEnterView.text;
        [nextButton setTag:16];
    }
    else if (nextButton.tag==16) {
        promptLabel.text = @"Seventeenth Label";
        textEnterView.text = @" ";
        [nextButton setTag:17];
    }
    else if (nextButton.tag==17) {
        [nextButton setTag:18];
    }
    else {
        promptLabel.text = @"Eighteenth Label";
        [nextButton setTag:1234];
    }

}

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

@end

很明显，这些标签除了“第十八个标签”之外还说了些什么，但如果我说明为什么这么说，我就会放弃这个应用程序的想法。但是，所有其余代码都与应用程序中的完全相同。感谢您的帮助！

Answer 1

我在我的 iPod Touch 上运行了它，它运行得非常好——但只有在没有插入计算机的情况下。我认为 Xcode 以某种方式搞砸了它，因为该应用程序在 iPod 未连接时工作，但在连接 iPod 并且计算机正在记录结果时不能工作。然而，重要的是它可以独立工作，所以虽然错误的原因仍然未知，但它已经解决了，因此并不重要。但是，如果有人想出一个真正解释该问题的解决方案，我当然会将其作为该问题的官方“答案”。可能问题在于它是为错误的构建设置构建的，例如 Arm__（其中 __ 是错误的字母 - 不确定哪些是正确的，哪些不是）。无论如何，这个问题似乎得到了奇怪的解决。