ModalViewController消除選擇器的視圖

Question

我有一個模式的視圖控制器，從我的主視圖呈現，我在視圖的右上角添加了一個「完成」按鈕（navigationcontroller）。但是，我無法讓選擇器調用正確的方法。下面是我使用的設置模式視圖代碼：

GraphView *graphView = [[[GraphView alloc] initWithNibName:@"GraphView" bundle:nil] autorelease]; 

//Set values in the graphView view 
[graphView setInterest:interestRateSlider.value/10]; 
[graphView setMonths: (loanTermSlider.value/2.0) * 12]; // Years * 12 = months 
[graphView setPrincipal:[principal intValue]]; 

//show the graph view as a modal navigation controller view 
UINavigationController *graphNavigationController = [[UINavigationController alloc] initWithRootViewController:graphView]; 
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc ] 
           initWithBarButtonSystemItem:UIBarButtonSystemItemCancel 
           target:graphView 
           action:@selector(dismissView:)]; 
graphView.navigationItem.rightBarButtonItem = doneButton; 
[graphNavigationController.navigationItem.rightBarButtonItem setTitle:@"Done"]; 
[graphView.navigationItem setTitle:@"Graph"]; 
[self presentModalViewController:graphNavigationController animated:YES]; 
[graphNavigationController release]; 
[doneButton release]; 

然後在我的graphView類我有方法：

-(void) dismissView { 
    [self dismissModalViewControllerAnimated: YES]; 
} 

但是，當運行代碼時，我得到無法識別的選擇。選擇器試圖調用UINavigationController變量的方法。我怎樣才能讓選擇器調用正確的方法？

感謝

Answer 1

您調用選擇時做了一個錯誤的：

UIBarButtonItem *doneButton = [[UIBarButtonItem alloc ] 
          initWithBarButtonSystemItem:UIBarButtonSystemItemCancel 
          target:graphView 
          action:@selector(dismissView:)]; 

時dismissView被定義爲

-(void) dismissView; 

你應該定義dismissView爲

-(void) dismissView:(id)sender; 

或C所有它沒有冒號

UIBarButtonItem *doneButton = [[UIBarButtonItem alloc ] 
          initWithBarButtonSystemItem:UIBarButtonSystemItemCancel 
          target:graphView 
          action:@selector(dismissView)];