31

如何将 UIActivityIndi​​catorView 微调器圈添加到 UIBarButton 中，以便当用户点击导航栏上的这些按钮之一时，他们会在加载时看到微调器？

4

6 回答 6

49

如果您尝试在导航栏按钮中显示活动轮（例如，您的导航栏上可能有一个刷新按钮） - 您可以创建一个新UIBarButtonItem的自定义视图UIActivityIndicatorView：

Objective-C

uiBusy = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite];
uiBusy.hidesWhenStopped = YES;
[uiBusy startAnimating];
[self.navigationItem.rightBarButtonItem initWithCustomView:uiBusy];

迅速

let uiBusy = UIActivityIndicatorView(activityIndicatorStyle: .White)
uiBusy.hidesWhenStopped = true
uiBusy.startAnimating()
self.navigationItem.rightBarButtonItem = UIBarButtonItem(customView: uiBusy)

rightBarButtonItem这会用纺车覆盖你。完成后，只需重新创建rightBarButtonItem.

于 2011-02-01T20:22:54.553 回答
6 
activityIndicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite];
activityIndicator.hidesWhenStopped = YES;
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:activityIndicator];

将以下内容放在需要的地方：

[activityIndicator startAnimating];
[activityIndicator stopAnimating];
于 2013-02-21T08:00:34.700 回答
2

实际上活动指示器没有添加为工具栏项。这是当前视图的子视图。


    UIActivityIndicatorView *act = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite];
    [act setCenter:CGPointMake(20, 20)];
    [act startAnimating];
    [self.view addSubview:act];

记得在-(void)dealloc.

于 2009-11-12T07:59:14.823 回答
0

使用此方法

-(void)startAniatingActivityIndicator{
@try {
    activityIndicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite];
    activityIndicator.frame = CGRectMake(self.window.frame.size.width-30, 32.5, activityIndicator.bounds.size.width, activityIndicator.bounds.size.height);
    [self.window addSubview:activityIndicator];
    [activityIndicator startAnimating];
    [self.window bringSubviewToFront:activityIndicator];
}
@catch (NSException *exception) {

}
@finally {

}

}

-(void)stopAniatingActivityIndicator{
[activityIndicator stopAnimating];
[activityIndicator removeFromSuperview];
activityIndicator = nil;

}

于 2014-04-26T05:54:32.623 回答
-1

UIActivityIndi​​catorView 是一种视图。将其框架设置在您的按钮内，并使用 -addSubview 将其添加到 UIBarButton 的视图层次结构中。

我过于简单化了，因为您必须尝试使其适合空间（可能通过缩放）并将其居中...

于 2009-11-12T05:38:20.083 回答
-2

伪代码，我不打算在 Xcode 中检查这个，但是这样的东西应该可以工作：

UIActivityIndicatorView *act = [[UIActivityIndicatorView alloc] init];
act.frame = CGMakeRect(3,3,25,25);
[myBarButton addSubview:act];
[act release];
于 2009-11-12T05:41:49.563 回答