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"unrecognized selector sent to instance" error in Objective-C（40个答案）
3小时前关门了。
由于ios中未捕获异常，无法识别的选择器发送到示例并终止应用程序（& T）。由于ios中未捕获异常，无法识别的选择器发送到示例并终止应用程序（& T）//Close UIBarButtonItem * closeButton =[[UIBarButtonItem alloc] initWithTitle：[[I18n sharedInstance] cancelButton] style：UIBarButtonSystemItemCancel target：self action：@selector（dismsSignatureView：）];[自导航项设置左栏按钮项：关闭按钮];[关闭按钮释放];

// Close
    UIBarButtonItem *closeButton = [[UIBarButtonItem alloc] initWithTitle:[[I18n sharedInstance] cancelButton]
                                                                    style:UIBarButtonSystemItemCancel
                                                                   target:self
                                                                   action:@selector(dismissSignatureView:)];
    [self.navigationItem setLeftBarButtonItem:closeButton];
    [closeButton release];
    
    
    // Close Button
    UIBarButtonItem *eraseButton = [[UIBarButtonItem alloc] initWithTitle:@"Clear"
                                                                    style:UIBarButtonItemStyleBordered
                                                                   target:self
                                                              action:@selector(eraseSignature:)];
    
    [self.navigationItem setLeftBarButtonItem:eraseButton];
    [eraseButton release];
    
    // Close and Save
    UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithTitle:[[I18n sharedInstance] okButton]
                                                                   style:UIBarButtonItemStyleBordered
                                                                  target:self
                                                                  action:@selector(dismissSignatureViewAndSelect:)];
    doneButton.tag = fieldTag;
  
    [self.navigationItem setRightBarButtonItem:doneButton];
    [doneButton release];
    
    [self.signatureSheet.navigationBarView setItems:[NSArray arrayWithObjects:closeButton, eraseButton, doneButton, nil]];
   
    [self.signatureSheet viewWillAppear:NO];