2回目のタッチ後にUIButton EXC_BAD_ACCESS？

Question

「Touch Up Inside」でUIButtonをタッチするたびに、アプリケーションがEXC_BAD_ACCESSでクラッシュする2回目です。私は問題を見つけられず、すべてが問題ないと思う。ここで

は私の.hファイルである：

#import <UIKit/UIKit.h> 

@interface AnleitungWebViewController : UIViewController { 

    UIWebView *anleitungwebview; 
    NSURL *pdfpfad_anleitung; 
    NSString *aktuellesBild; 
    NSString *nummer; 
    IBOutlet UIActivityIndicatorView *indicator; 
    IBOutlet UILabel *laden; 
    IBOutlet UIButton *vor; 
} 

@property (nonatomic, retain) IBOutlet UIWebView *anleitungwebview; 
@property (nonatomic, retain) IBOutlet UIActivityIndicatorView *indicator; 
@property (nonatomic, retain) IBOutlet UILabel *laden; 
@property (nonatomic, retain) IBOutlet UIButton *vor; 
@property (nonatomic, retain) NSURL *pdfpfad_anleitung; 
@property (nonatomic, retain) NSString *aktuellesBild; 
@property (nonatomic, retain) NSString *nummer; 

- (IBAction)zuruck:(id)sender; 
- (IBAction)vor:(id)sender; 


@end 

そして、私の.mファイル：アイデアと

#import "AnleitungWebViewController.h" 

@implementation AnleitungWebViewController 

@synthesize anleitungwebview, pdfpfad_anleitung, indicator, laden, aktuellesBild, nummer, vor; 

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil 
{ 
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; 
    if (self) { 
     // Custom initialization 
    } 
    return self; 
} 

- (void)didReceiveMemoryWarning 
{ 
    // Releases the view if it doesn't have a superview. 
    [super didReceiveMemoryWarning]; 

    // Release any cached data, images, etc that aren't in use. 
} 

#pragma mark - View lifecycle 

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view from its nib. 
    //NSURLRequest *request = [[NSURLRequest alloc] initWithURL:pdfpfad_anleitung]; 
    //[anleitungwebview loadRequest:request]; 

    //aktuellesBild = @"anl_30148_120701-de-001"; 

    NSString *path = [[NSBundle mainBundle] pathForResource:aktuellesBild ofType:@"jpg"]; 
    NSURL *url = [NSURL URLWithString:path]; 

    NSURLRequest *request = [[NSURLRequest alloc] initWithURL:url]; 
    [anleitungwebview loadRequest:request]; 
} 

- (void)webViewDidStartLoad:(UIWebView *) webView { 

    [indicator startAnimating]; 
    indicator.hidden = NO; 
    laden.hidden = NO; 

} 

- (void)webViewDidFinishLoad:(UIWebView *) webView { 

    [indicator stopAnimating]; 
    indicator.hidden = YES; 
    laden.hidden = YES; 

} 

- (void)viewDidUnload 
{ 
    [super viewDidUnload]; 
    // Release any retained subviews of the main view. 
    // e.g. self.myOutlet = nil; 
} 

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation 
{ 
    // Return YES for supported orientations 
    return (interfaceOrientation == UIInterfaceOrientationPortrait); 
} 

- (IBAction)zuruck:(id)sender { 

    nummer = [aktuellesBild substringFromIndex:[aktuellesBild length]-3]; 

    int num = [nummer intValue]; 
    num = num - 1; 

    if (num < 10) { 
     nummer = @"00"; 
     nummer = [nummer stringByAppendingString:[NSString stringWithFormat:@"%d", num]]; 
    } 
    else if (num > 9) { 
     nummer = @"0"; 
     nummer = [nummer stringByAppendingString:[NSString stringWithFormat:@"%d", num]]; 
    } 
    else{ 
     nummer = [nummer stringByAppendingString:[NSString stringWithFormat:@"%d", num]]; 
    } 

    aktuellesBild = [aktuellesBild substringToIndex:[aktuellesBild length]-3]; 
    aktuellesBild = [aktuellesBild stringByAppendingString:nummer]; 

    NSString *path = [[NSBundle mainBundle] pathForResource:aktuellesBild ofType:@"jpg"]; 
    NSURL *url = [NSURL URLWithString:path]; 

    NSURLRequest *request = [[NSURLRequest alloc] initWithURL:url]; 
    [anleitungwebview loadRequest:request]; 

    NSLog(@"%@", aktuellesBild); 
} 

- (IBAction)vor:(id)sender { 

    NSLog(@"TEST"); 

    nummer = [aktuellesBild substringFromIndex:[aktuellesBild length]-3]; 

    int num = [nummer intValue]; 
    num = num + 1; 

    if (num < 10) { 
     nummer = @"00"; 
     nummer = [nummer stringByAppendingString:[NSString stringWithFormat:@"%d", num]]; 
    } 
    else if (num > 9) { 
     nummer = @"0"; 
     nummer = [nummer stringByAppendingString:[NSString stringWithFormat:@"%d", num]]; 
    } 
    else{ 
     nummer = [nummer stringByAppendingString:[NSString stringWithFormat:@"%d", num]]; 
    } 

    aktuellesBild = [aktuellesBild substringToIndex:[aktuellesBild length]-3]; 
    aktuellesBild = [aktuellesBild stringByAppendingString:nummer]; 

    NSString *path = [[NSBundle mainBundle] pathForResource:aktuellesBild ofType:@"jpg"]; 
    NSURL *url = [NSURL URLWithString:path]; 

    NSURLRequest *request = [[NSURLRequest alloc] initWithURL:url]; 
    [anleitungwebview loadRequest:request]; 

    NSLog(@"%@", aktuellesBild); 
} 

- (void)dealloc { 

    [anleitungwebview release]; 
    [laden release]; 
    [indicator release]; 
    [pdfpfad_anleitung release]; 
    [aktuellesBild release]; 
    [nummer release]; 
    [vor release]; 
    [super dealloc]; 
} 


@end 

誰ですか？

Answer 1

あなたは

nummer = [aktuellesBild substringFromIndex:[aktuellesBild length]-3];