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December 17, 2019 14:27
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show and hide a fullscreen overlay UIView with a spinner; works even in Action/Share extensions that don't have [UIApplication sharedApplication]
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#define OVERLAY_VIEW_TAG 298739 | |
-(void)showSpinner | |
{ | |
UIView *back = [[UIView alloc]initWithFrame:CGRectMake(0, 0, UIScreen.mainScreen.bounds.size.width, UIScreen.mainScreen.bounds.size.height)]; | |
back.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:0.6]; | |
back.tag = OVERLAY_VIEW_TAG; | |
[self.view addSubview:back]; | |
UIActivityIndicatorView *spinner = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge]; | |
spinner.center = back.center; | |
spinner.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin|UIViewAutoresizingFlexibleRightMargin|UIViewAutoresizingFlexibleBottomMargin|UIViewAutoresizingFlexibleTopMargin; | |
[back addSubview:spinner]; | |
[spinner startAnimating]; | |
self.navigationController.navigationBar.layer.zPosition = -1; | |
} | |
-(void)hideSpinner | |
{ | |
[[self.view viewWithTag:OVERLAY_VIEW_TAG] removeFromSuperview]; | |
self.navigationController.navigationBar.layer.zPosition = 1; | |
} |
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