Как исправить ошибку компиляции в Objective-C?

Question

[Vanya Ivanov]

При компиляции выдает вот такую вот ошибку:

"
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)
"

Как с этим бороться?

Comments

[anyd3v]

код приведите

[Vanya Ivanov]

@anyd3v

#import "SMViewController.h"

@interface SMViewController () {
    
    NSNumber *x, *y;
    NSString *operation;
}

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


@end

@implementation SMViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    [self.display setText:@"0"];
	
}


- (IBAction)digitButton:(id)sender {
    
    NSString *stringDigit = self.display.text;
    
    if ([operation isEqualToString:@"+"]
        || [operation isEqualToString:@"-"]
        || [operation isEqualToString:@"x"]
        || [operation isEqualToString:@"÷"])
    {
        operation = stringDigit;
    }
    else if ([operation isEqualToString:@"="]) {
        
        NSArray *resultArr = [self.display.text componentsSeparatedByString:operation];
        
        if ([resultArr count] == 2) {
            
            x = [NSNumber numberWithFloat:[resultArr [0] floatValue]];
            y = [NSNumber numberWithFloat:[resultArr [1] floatValue]];
            
            [self goOperation];
            return;
        }
        else {
            
            [self.display setText:@"error"];
            [self performSelector:@selector(clearDisplay) withObject:nil afterDelay:1];
        }
    }
    // else
    // Get digit on display
    {
        if ([self.display.text isEqualToString:@"0"]) {
            
            [self.display setText:@""];
        }
        NSString *getDigitOnDisplay = [self.display.text stringByAppendingString:stringDigit];
        
        [self.display setText:getDigitOnDisplay];
    }
}

- (void)goOperation {
    
    if (x > 0 || x < 0 || y > 0 || y < 0) {
        
        NSString *result = @"";
        
        if ([operation isEqualToString:@"+"]) {
            
            NSNumber *resultNumber = [NSNumber numberWithFloat:[x floatValue] + [y floatValue]];
            result = [NSString stringWithFormat:@"%@", resultNumber];
        }
        else if ([operation isEqualToString:@"-"]) {
            
            NSNumber *resultNumber = [NSNumber numberWithFloat:[x floatValue] - [y floatValue]];
            result = [NSString stringWithFormat:@"%@", resultNumber];
        }
        else if ([operation isEqualToString:@"x"]) {
            
            NSNumber *resultNumber = [NSNumber numberWithFloat:[x floatValue] * [y floatValue]];
            result = [NSString stringWithFormat:@"%@", resultNumber];
        }
        else if ([operation isEqualToString:@"÷"]) {
            
            NSNumber *resultNumber = [NSNumber numberWithFloat:[x floatValue] / [y floatValue]];
            result = [NSString stringWithFormat:@"%@", resultNumber];
        }
        else if ([operation isEqualToString:@"+%"]) {
            
            NSNumber *resultNumber = [NSNumber numberWithFloat:[x floatValue] + [y floatValue] / 100 * [x floatValue]];
            result = [NSString stringWithFormat:@"%@", resultNumber];
        }
        else if ([operation isEqualToString:@"-%"]) {
            
            NSNumber *resultNumber = [NSNumber numberWithFloat:[x floatValue] -  [y floatValue] / 100 * [x floatValue]];
            result = [NSString stringWithFormat:@"%@", resultNumber];
        }
        else if ([operation isEqualToString:@"."]) {
            
            result = [NSString stringWithFormat:@"."];
        }
        
        [self.display setText:result];
    }
}

- (void)clearDisplay {
    
    [self.display setText:@"0"];
}

- (IBAction)clearDisplayButton:(id)sender {
    
    [self.display setText:@"0"];
}


- (IBAction)clearLastElementFromDisplay:(id)sender {
    
    NSString *clearLastElement = self.display.text;
    
        clearLastElement = [clearLastElement substringToIndex:[clearLastElement length] - 1];
        
        [self.display setText:clearLastElement];

}

@end

Answer 1

[Denis Morozov]

1. откройте xcode
2. на панели что находится вверху экрана нажмите debug
3. выбирите breakpoints
4. нажмите create exception breakpoint

таким образов вы увидите на какой строчке падает exception

Answer 2

[mozilla9]

Тут падает не при компиляции (это важно), а при старте приложения.
Возможно что-то в storyboard не так. Внимательно просмотрите.