Question

当我点击按钮（刷新）时，我想在NavigationBar中显示一个循环进度指示器代替标题，当刷新成功时，指示消失，标题将再次显示。

有什么建议吗？谢谢。

Answer 1

您可以编写将UIActivityIndicatorView添加到UInavigatiobar中的代码，如： -

 UIView *activityView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 44)];
 activityView.backgroundColor = [UIColor clearColor];
 UIActivityIndicatorView *act =[[UIActivityIndicatorView alloc] init]; //create this globule so u can stop it while your progress finished
 act.frame=CGRectMake(0, 0, 30, 30);
 [activityView addSubview:act];
 self.navigationItem.titleView = activityView;

注意： - [act startAnimating];和[act stopAnimating];符合您的需要

或者您可以将其添加到UInavigation BarbuttonItem

中

    UIView *activityView = [[UIView alloc] initWithFrame:CGRectMake(0,0,30,30)];
    UIActivityIndicatorView *act =[[UIActivityIndicatorView alloc] init];
    act.frame=CGRectMake(0, 0, 30, 30);
    UIBarButtonItem *actItem = [[[UIBarButtonItem alloc] initWithCustomView:activityView] autorelease];
    [activityView addSubview:act];
    self.navigationItem.rightBarButtonItem = actItem;

注意： - [UIActivityIndicatorView startAnimating];和[UIActivityIndicatorView stopAnimating];符合您的需要

在Navigationbar中显示progressIndicator

1 个答案: