iPhone中心活动指示器，无论屏幕方向如何

How can I center an activity indicator programmatically regardless of screen orientation?

无论屏幕方向如何,我如何以编程方式居中显示活动指示器?

2 个解决方案

#1

Try setting the center property of your activity view, like this:

尝试设置活动视图的center属性,如下所示:

 activity.center = CGPointMake(self.view.frame.size.width/2,self.view.frame.size.height/2);

In viewDidLoad, register for notifications for the device rotation:

在viewDidLoad中,注册设备轮换的通知:

- (void)viewDidLoad {
   [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
   [[NSNotificationCenter defaultCenter] addObserver:self
        selector:@selector(didRotate:)
        name:UIDeviceOrientationDidChangeNotification object:nil];
}

and implement didRotate:

并实现didRotate:

-(void)didRotate:(NSNotification *)notification {   
   if (activity) {
    activity.center = CGPointMake(self.view.frame.size.width/2,self.view.frame.size.height/2);
    }
}

#2

I suggest you use https://github.com/jdg/MBProgressHUD Which is a great library for doing all kinds of "Loading" screens.

我建议你使用https://github.com/jdg/MBProgressHUD这是一个很棒的库,用于做各种“加载”屏幕。

#1