在按鈕上更改導航按鈕項目

Question

我希望能夠將正確的導航欄按鈕更改爲具有名稱和操作的其他按鈕。

爲例：

btnOpenImage按下並rightNavButton1變爲rightNavButton2

Answer 1

-(IBAction) btnOpenImage_Clicked:(id)sender{ 

//1. IF buttons are UIBarButtonItem then use bellow code 
        // This bellow line for Change the action(Target) 
       [rightNavButton1 setAction:@selector(rightNavButton2_Clicked)]; 

       //This bellow line For Change the Title 
       [rightNavButton1 setTitle:@"rightNavButton2_Clicked"]; 

//OR 2. IF buttons are UIButton then use bellow code 

       // This bellow line for Change the action(Target) 
       [rightNavButton1 addTarget:self action:@selector(rightNavButton2_Clicked) forControlEvents:UIControlEventTouchUpInside]; 

       //This bellow line For Change the Title 
       [rightNavButton1 setTitle: @"rightNavButton2" forState: UIControlStateNormal]; 
    } 

Answer 2

試試這個：

[btnOpenImage addTarget:self 
       action:@selector(aMethod) 
    forControlEvents:UIControlEventTouchDown]; 

- (void)aMethod 
{ 
    [rightNavButton1 setTitle: @"rightNavButton2" forState: UIControlStateNormal]; 

}