Iphone UIStoryboard中的UIBarButtonItem显示动作方法中的错误

在UIstoryboard中添加了uibarbuttonim，并声明了uibarbuttonim的操作方法

当为action方法编写代码时，它会在这一行显示错误

[_bookmarkbtn setBookmarkState:NO];

在这条线上

[_bookmarkbtn setBookmarkState:YES];

在下面的uibarbuttonite操作方法中

uibarbuttonitem没有可见的@interface声明选择器“setBookmarkState”

- (IBAction)bookmarkAction:(id)sender {

    currentIndex = [modelArray indexOfObject:contentViewController.page];

    if ([contentViewController.bookmarks containsIndex:currentIndex]) // Remove bookmark
    {
        [_bookmarkbtn setBookmarkState:NO]; [contentViewController.bookmarks removeIndex:currentIndex];
    }
    else // Add the bookmarked page index to the bookmarks set
    {
        [_bookmarkbtn setBookmarkState:YES]; [contentViewController.bookmarks addIndex:currentIndex];
    }
}

使用故事板时，我如何为此发出target:self action:@selector语句

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这可能对你有帮助。试试看。

谢谢，但那没用。而是通过这样写来修复它_bookmarkbtn.enabled=NO；和_bookmarkbtn.enabled=是；检查在接口方法setBookmarkState:（或属性bookmarkState）中是否有类UIBarButtonim。我在UIBarButtonim的文档中找不到任何名为bookmarkState的属性。。。

 -(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];
}