Question

我一直在研究ipad应用程序。在这个应用程序中，我有几个视图。这是流程

欢迎屏幕＆gt;主屏幕＆gt;剩下的其他部分

我在所有屏幕的导航栏上应用了主页图标（按钮）。在任何屏幕上按主页图标都会将用户带到主屏幕。我在Home类的viewDidLoad中编写了以下代码

//**** Home button on navigation bar ****//
CGRect frame1 = CGRectMake(975.0, 4.0, 35, 35);
UIImage *buttonImage1 = [UIImage imageNamed:@"HomeIcon.png"];
UIButton *homeButton = [UIButton buttonWithType:UIButtonTypeCustom];

homeButton.frame = frame1;
[homeButton setBackgroundImage:buttonImage1 forState:UIControlStateNormal];
homeButton.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
homeButton.contentHorizontalAlignment = UIControlContentHorizontalAlignmentCenter;
[homeButton addTarget:self action:@selector(goHome:) forControlEvents:UIControlEventTouchUpInside];
[homeButton setBackgroundColor:[UIColor clearColor]];

[self.navigationController.navigationBar addSubview:homeButton];

此按钮功能正常。 goHome是@selector中应用的方法的名称。我想从主屏幕中删除此按钮并将其保留在其余屏幕上。我已经应用了几件事，但我不知道该怎么做。这似乎很简单，但我仍然没有得到它。请指导..

此致 PC

Answer 1

在“主屏幕”viewDidAppear方法中执行以下操作：

for(UIView* view in self.navigationController.navigationBar.subviews)
{
     if(view.tag == 10)
     {
        view.hidden = YES;
     }
}

在您创建主页按钮的按钮设置标记为10的其他视图控制器中。

/**** Home button on navigation bar ****//
CGRect frame1 = CGRectMake(975.0, 4.0, 35, 35);
UIImage *buttonImage1 = [UIImage imageNamed:@"HomeIcon.png"];
UIButton *homeButton = [UIButton buttonWithType:UIButtonTypeCustom];
[homebutton setTag:10]; // Set tag to 10 or any value
homeButton.frame = frame1;
[homeButton setBackgroundImage:buttonImage1 forState:UIControlStateNormal];
homeButton.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
homeButton.contentHorizontalAlignment = UIControlContentHorizontalAlignmentCenter;
[homeButton addTarget:self action:@selector(goHome:) forControlEvents:UIControlEventTouchUpInside];
[homeButton setBackgroundColor:[UIColor clearColor]];

[self.navigationController.navigationBar addSubview:homeButton];

在你的viewDidAppear中：这个其他视图控制器：

for(UIView* view in self.navigationController.navigationBar.subviews)
{
    if(view.tag == 10)
    {
      view.hidden = NO;
    }
}

Answer 2

试试这个：

self.navigationItem.backBarButtonItem = nil;

如何从导航栏中删除按钮？

2 个答案: