按下按钮时更改导航按钮项

Question

我希望能够将右侧导航栏按钮更改为具有名称和操作的其他按钮。

举个例子：

btnOpenImage 被按下，右导航按钮 1 更改为右导航按钮 2

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

试试这个：

[btnOpenImage addTarget:self 
               action:@selector(aMethod)
     forControlEvents:UIControlEventTouchDown];
- (void)aMethod
{
   [rightNavButton1 setTitle: @"rightNavButton2" forState: UIControlStateNormal];
}