ios自定义hub指示器

UIView *loadingView = [[UIViewalloc]initWithFrame:CGRectMake((self.view.frame.size.width - 80) /2.0f, ([UIScreenmainScreen].bounds.size.height - 80.f)/2.0f,80.0f,80.0f)];

    [loadingViewsetBackgroundColor:[UIColorgrayColor]];

    [loadingView.layersetCornerRadius:10.0f];

    [loadingView.layersetMasksToBounds:YES];

    

    UIActivityIndicatorView *loading = [[UIActivityIndicatorViewalloc]initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];

    [loading startAnimating];

    [loading setFrame:CGRectMake(30.f,30.0f,20.0f,20.0f)];

    [loadingViewaddSubview:loading];

    [self.viewaddSubview:loadingView];

    [loadingViewsetHidden:NO];