Ios 返回UIApplicationMain（argc、argv、nil、NSStringFromClass（[AppDelegate类]）；线程1:SIGBART

每当我尝试运行我的应用程序时，都会出现此错误消息

viewController.h

#import "ViewController.h"

@interface ViewController ()

@end

---

viewController.m

@implementation ViewController

- (void)viewDidLoad {

    // Do any additional setup after loading the view, typically from a nib
    [super viewDidLoad];

    label.text = @"Number";

}

- (void)didReceiveMemoryWarning {

    // Dispose of any resources that can be recreated
    [super didReceiveMemoryWarning];

}


- (IBAction)numberButton {

    int number;
    number = arc4random() %100;

    // Turns the integer (number) into a string
    NSString *numberDisplay = [NSString stringWithFormat: @"%i", number];

    // Because the text has to be a string, i.e. an NSString
    label.text = numberDisplay;

}

- (IBAction)numButton {

    int number;
    number = arc4random() %100;

    // Turns the integer (number) into a string
    NSString *numberDisplay = [NSString stringWithFormat: @"%i", number];

    // Because the text has to be a string, i.e. an NSString
    label.text = numberDisplay;

}

- (IBAction)color {

    int color;
    color = rand() %4;

    switch (color) {
        case 0:
            label.textColor = [UIColor redColor];
            break;

        case 1:
            label.textColor = [UIColor purpleColor];
            break;

        case 2:
            label.textColor = [UIColor blueColor];
            break;

        case 3:
            label.textColor = [UIColor greenColor];
            break;

        default:
            break;
    }

}

- (IBAction)fontSize {

    int fontSize;
    fontSize = rand() %6;

    switch (fontSize) {
        case 0:
            [label setFont: [UIFont fontWithName:@"" size:5]];
            break;

        case 1:
            [label setFont: [UIFont fontWithName:@"" size: 15]];
            break;

        case 2:
            [label setFont: [UIFont fontWithName:@"" size: 25]];
            break;

        case 3:
            [label setFont: [UIFont fontWithName:@"" size: 35]];
            break;

        case 4:
            [label setFont: [UIFont fontWithName:@"" size: 40]];
            break;

        case 5:
            [label setFont: [UIFont fontWithName:@"" size: 45]];
            break;

        default:
            break;
    }
}

@end

My.h具有所有相同的操作。我已经反复检查了是否有拼写错误和/或连接错误。还有什么问题吗？

取出

int number; 
number = arc4random() %100;

---

在行动中。没有必要拥有它们。

我在一个测试项目中尝试了您的代码，效果很好

我想也许你在这方面犯了一个错误。确认您的iAction连接没有冗余连接

这是我的代码（实际上我几乎没做任何更改）：

---

您能在问题中更清楚地说明问题所在吗？请确保您的代码正确突出显示，并且我在两行之间找不到任何错误消息。设置一个异常断点，让我们知道您在哪一行崩溃。另外，发布完整的符号化堆栈跟踪。谢谢大家。很抱歉，我的代码格式不好，这是我第一次在网站上修复它。故事板中的视图控制器存在一个问题，按下黄色按钮后，我可以删除。感谢所有有用的评论和回答！下次我将更好地制定我的代码！谢谢这是如何解决OP的崩溃问题的？此外，OP正在设置一个文本标签，其结果为

number

，因此删除此代码实际上没有帮助。好吧，但这仍然不是答案。充其量应该是一个评论。

#import "ViewController.h"


@interface ViewController()

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

@end

@implementation ViewController


@synthesize label;

- (void)viewDidLoad {

    // Do any additional setup after loading the view, typically from a nib
    [super viewDidLoad];

    label.text = @"Number";

}

- (void)didReceiveMemoryWarning {

    // Dispose of any resources that can be recreated
    [super didReceiveMemoryWarning];

}


- (IBAction)numberButton {

    int number;
    number = arc4random() %100;

    // Turns the integer (number) into a string
    NSString *numberDisplay = [NSString stringWithFormat: @"%i", number];

    // Because the text has to be a string, i.e. an NSString
    label.text = numberDisplay;

}

- (IBAction)numButton {

    int number;
    number = arc4random() %100;

    // Turns the integer (number) into a string
    NSString *numberDisplay = [NSString stringWithFormat: @"%i", number];

    // Because the text has to be a string, i.e. an NSString
    label.text = numberDisplay;

}

- (IBAction)color {

    int color;
    color = rand() %4;

    switch (color) {
        case 0:
            label.textColor = [UIColor redColor];
            break;

        case 1:
            label.textColor = [UIColor purpleColor];
            break;

        case 2:
            label.textColor = [UIColor blueColor];
            break;

        case 3:
            label.textColor = [UIColor greenColor];
            break;

        default:
            break;
    }

}

- (IBAction)fontSize {

    int fontSize;
    fontSize = rand() %6;

    switch (fontSize) {
        case 0:
            [label setFont: [UIFont fontWithName:@"" size:5]];
            break;

        case 1:
            [label setFont: [UIFont fontWithName:@"" size: 15]];
            break;

        case 2:
            [label setFont: [UIFont fontWithName:@"" size: 25]];
            break;

        case 3:
            [label setFont: [UIFont fontWithName:@"" size: 35]];
            break;

        case 4:
            [label setFont: [UIFont fontWithName:@"" size: 40]];
            break;

        case 5:
            [label setFont: [UIFont fontWithName:@"" size: 45]];
            break;

        default:
            break;
    }
}

@end