如何设置活动的指示，在导航吧?

Question

我是新来的iphone发展。我想设置一个活动的指示，在导航条。我看到我活动的指示以下的导航条。我的代码就在这里

- (IBAction) gomethod : (id) sender {
    xxMapSubviewcontroller = [[XxMapSubviewcontroller alloc] init];
    [self.navigationController pushViewController:xxMapSubviewcontroller animated:YES];

    activityIndicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
    activityIndicator.frame = CGRectMake(0.0, 0.0, 20.0, 20.0);
    [activityIndicator startAnimating];

    [xxMapSubviewcontroller.view addSubview:activityIndicator];
}

我怎么可以把我的活动的指示，在导航吧?请帮助我。谢谢。

Answer 1

我添加下面的代码段中，其中i想在导航栏的活性指示器的视图。

activityIndicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
UIBarButtonItem * barButton = [[UIBarButtonItem alloc] initWithCustomView:activityIndicator];
[self navigationItem].rightBarButtonItem = barButton;
[activityIndicator startAnimating];

Answer 2

Swift代码：

let activityIndicator = UIActivityIndicatorView(frame: CGRect(x: 0, y: 0, width: 20, height: 20))
let barButton = UIBarButtonItem(customView: activityIndicator)
self.navigationItem.setRightBarButtonItem(barButton, animated: true)
activityIndicator.startAnimating()

Answer 3

您正在创建这里新活动的指标来看，这是很好的，但你是不是指在状态栏上的活动指示灯。

要显示在状态条中的活动的指标，只需调用这样：

[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:YES];

Answer 4

这在斯威夫特为我工作：

let activityIndicator: UIActivityIndicatorView = UIActivityIndicatorView.init(activityIndicatorStyle: .White)
let refreshBarButton: UIBarButtonItem = UIBarButtonItem(customView: activityIndicator)
self.navigationItem.leftBarButtonItem = refreshBarButton
activityIndicator.startAnimating()

Answer 5

在情节串连图板：是在导航栏创建BarButtonItem。 添加视图是你BarButtonItem和ActivityIndicator的儿子是你的View的儿子。

Answer 6

例如WhatsApp：

//声明

let activityIndicator = UIActivityIndicatorView(activityIndicatorStyle: .gray)

// viewDidLoad中

self.activityIndicator.hidesWhenStopped = true

func showIndicator() {
    self.navigationItem.titleView = self.activityIndicator
    self.activityIndicator.isHidden = false
}

func hideIndicator() {
    self.navigationItem.titleView = nil
}

Answer 7

谢谢！现在我的指示器工作。

我分担同胞菜鸟一个代码示例，把这种上下文。

<强> - （无效）viewDidLoad中

// custom button images
UIImage *customImage = [UIImage imageNamed:@"menu24"];
UIImage *customImage2 = [UIImage imageNamed:@"search24"];
UIImage *customImage3 = [UIImage imageNamed:@"back24"];

// These are linked in my story board to Navigation Item
[self customiseBarBtnItem:[self menu_button] 
    customImage:customImage selector:@selector(menuPressed:)];
[self customiseBarBtnItem:[self search_button] 
    customImage:customImage2 selector:@selector(searchPressed:)];
[self customiseBarBtnItem:[self backButton] 
    customImage:customImage3 selector:@selector(backPressed:)];

//initialize the activity indicator - as @antf comment suggests for ios7   
UIActivityIndicatorView *actInd=[[UIActivityIndicatorView alloc]                                      
     initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];

//store it as a property on the view controller
self.activityIndicator = actInd;

// this sets up activity indicator    
UIBarButtonItem *progress_indicator = [[UIBarButtonItem alloc] 
     initWithCustomView:[self activityIndicator]];

// link custom buttons AND activity indicator in desired order to navigation bar
self.navigationItem.rightBarButtonItems =
    [NSArray arrayWithObjects:
         self.menu_button,
         self.search_button, 
         progress_indicator, 
         nil];

//为了完整 - 这是我如何编程显示/隐藏我的背部按钮

if ( bShowBack == YES ) 
     self.navItemBar.leftBarButtonItem = self.backButton;
else 
     self.navItemBar.leftBarButtonItem = Nil;

<强> //使用我与一个UIWebView活动的指标如下所以触发它

  - (void)webViewDidStartLoad:(UIWebView *)webView
  {    
    [[self activityIndicator] startAnimating];
  }

  - (void)didFailLoadWithError:(UIWebView *)webView 
          didFailLoadWithError:(NSError *)error
  {    
     [[self activityIndicator] stopAnimating];
  }

  - (void)webViewDidFinishLoad:(UIWebView *) webView
  {
     [[self activityIndicator] stopAnimating];
  }

Answer 8

在夫特，我做了以下：

启用： UIApplication.sharedApplication().networkActivityIndicatorVisible = true

停用 UIApplication.sharedApplication().networkActivityIndicatorVisible = false

Answer 9

Swift

1. 连接 UIBarButtonItem 从 storyboard 要 yourViewController
2. 删除 week 从其定义，如： @IBOutlet var btNavigaitonRight: UIBarButtonItem!

3. 使用这些方法对于启动和停止活动的指标：

   var activityIndicator = UIActivityIndicatorView()
   
   func startBarButtonIndicator() {
       activityIndicator = UIActivityIndicatorView(frame: CGRect(x: 0, y: 0, width: 20, height: 20))
       activityIndicator?.color = .gray
       let barButton = UIBarButtonItem(customView: activityIndicator!)
       self.navigationItem.setRightBarButton(barButton, animated: true)
       activityIndicator?.startAnimating()
   }
   
   func stopBarButtonIndicator() {
       activityIndicator?.stopAnimating()
       navigationItem.setRightBarButton(btNavigaitonRight, animated: true)
   }
   

Answer 10

我与响应一个类似的问题这里： iphone - 编程修改导航栏按钮活动的指标

我想改变在导航栏到活动的指标，然后再返回的刷新按钮。

Answer 11

尝试：self.navigationItem.leftBarButtonItem.customView = your_view

Answer 12

我试图使用它现在代码中提到由战士没有工作的完全一样。我不得不改变初始化的activityIndicator:

activityIndicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];

随着这一变化，它应按预期工作。